Capital-Gain & Tax-Loss Harvesting

"Tax-loss harvesting." "Gain harvesting." The words sound like something a private wealth manager does for people with a comma or two more than you in their account — or worse, like a clever-sounding maneuver that gets ordinary people audited. Both fears are common, and both are wrong, and this lesson exists to replace them with something you can actually use. Here is the honest frame before we teach a single number: harvesting is not a loophole and it is not a gray area. It is two ordinary, fully legal moves the tax code openly invites, and the more surprising one — realizing a gain and paying zero tax on it — is available precisely to people with modest incomes, not just the wealthy.

Let's name the two moves plainly, because once you see them side by side the fear drains out. The first is tax-loss harvesting: you sell an investment that's worth less than you paid, which creates a capital loss, and that loss cancels out gains you owe tax on (and even a slice of your ordinary income). You don't have to leave the market to do it — you buy something similar back. The second is gain harvesting: in a year when your income is low enough, you deliberately sell an investment that has gone *up*, realize the gain, and pay tax on it at the 0% long-term capital-gains rate — yes, a real 0% — then buy it right back at the new, higher price. You didn't owe a cent, and you permanently raised your cost basis so a future sale is smaller. One move harvests a loss to cut this year's bill; the other harvests a gain at no cost to shrink a future one.

We'll learn this through three of our filers, each carrying a different piece. Priya and Raj Malhotra — a dual-income Seattle couple earning over $275,000 with a real brokerage account — lead the loss-harvesting story, because their higher income is exactly where a harvested loss saves the most. Nadia Okonkwo, the 26-year-old marketing coordinator in Columbus earning $58,000, carries the move that proves this isn't only for the wealthy: she'll realize a gain and pay $0 federal tax on it. And Chad Molina, a crypto trader in Denver, shows the one place the wash-sale rule doesn't reach — yet. By the end you'll be able to look at your own account in a down market, or in a low-income year, and know which harvest is yours — and how to make it without tripping the one rule that can undo it all.

The word borrows from farming on purpose: you let something grow, and then, at the right moment, you deliberately gather it in. In investing, harvesting means intentionally triggering a taxable event — a sale — not because you need the money or want out of the investment, but because the *tax result* of selling right now is valuable. You then usually get right back into a very similar position, so your money stays invested. The whole art is in the timing and in staying inside the rules while you do it.

To use the two moves you only need a handful of ideas you've met before, so here is the fast recap — the machinery, not the full course. A capital gain is the profit when you sell an investment for more than your basis (what you paid, adjusted for things like reinvested dividends); a capital loss is the opposite. Hold the investment more than one year and the result is long-term — taxed at the gentle 0%, 15%, or 20% rates; hold it one year or less and it's short-term — taxed at your ordinary income rates, the same as wages. When you have both, they net against each other: losses first cancel gains of the same type, then across types, and if a net loss remains, up to $3,000 of it comes off your ordinary income, with anything left carried forward to future years. The wash-sale rule polices one thing — it stops you from claiming a loss if you rebuy the same investment too quickly. And the 3.8% Net Investment Income Tax (NIIT) is an extra tax higher earners pay on investment income. That's the toolbox. Every strategy below is just a clever arrangement of those parts.

Notice what the map shows: the two moves point in opposite directions but rhyme. A gain harvest deliberately *pays* tax — at a 0% rate, so "pays" means nothing — to step your basis *up*. A loss harvest deliberately *books* a loss to pull your tax *down*. In both, you end the day still invested in essentially the same thing. The rest of the lesson is these two columns, one at a time, with the wash-sale rule standing guard over the right-hand one.

Start with the fact that disarms the "only for the rich" fear, because it's genuinely startling the first time you meet it: there is a 0% federal tax rate on long-term capital gains, and it is not a rounding trick or a temporary promotion. It is a permanent, built-in bracket, and it exists specifically for people with lower and middle incomes. If your total taxable income is modest enough, you can sell a long-held, appreciated investment, realize the gain, and owe the federal government exactly nothing on it. Most people go their whole lives without knowing the bracket is there, which is the real tragedy — it's a free basis reset, and it goes unclaimed.

For tax year 2026, the long-term capital-gains rates work in three bands, keyed to your taxable income (that's your income after your standard or itemized deduction — an important detail we'll use in a moment). The exact 2026 breakpoints, verified against the IRS's official inflation-adjustment figures (Revenue Procedure 2025-32), are:

Now the crucial mechanic that makes the 0% bracket usable, and that trips up almost everyone the first time — stacking. Your ordinary income (wages, interest, short-term gains) is counted *first* and fills the brackets from the bottom. Your long-term gains and qualified dividends are then stacked on top of that, and they get the 0% rate only for the portion that still falls below the 0% breakpoint. So the amount you can harvest at 0% isn't the breakpoint itself — it's the breakpoint minus the ordinary taxable income you already have. That leftover space is your "0% room." Fill it with long-term gains and they're taxed at nothing; go past it and the overflow is taxed at 15%. Let's put a real person in it.

Nadia's 0% room, to the dollar

Nadia earns $58,000 at one W-2 job. From her foundation return we know the numbers cold: her total income is $58,180 (wages plus $180 of bank interest), she subtracts $900 of student-loan interest to reach an adjusted gross income of $57,280, and after the 2026 single standard deduction of $16,100 her ordinary taxable income is $41,180. That $41,180 is what fills her brackets first. The single 0% capital-gains breakpoint for 2026 is $49,450. So her 0% room is:

Sit with that. Nadia is not wealthy, not retired, not in some special year — she's a 26-year-old on an ordinary salary, and she still has $8,270 of room to realize gains at a 0% federal rate. Say she owns an index-fund lot she bought years ago for $12,000 that's now worth $20,270 — an $8,270 long-term gain sitting there unrealized. She sells the whole lot. The $8,270 gain stacks on top of her $41,180 and lands right at the $49,450 ceiling, so every dollar of it is taxed at 0%. Her total federal tax for the year stays exactly $4,694 — the same as if she'd never sold. She realized $8,270 of profit and her tax bill did not move by a single dollar.

Here's why she'd bother, since she didn't need the cash: the instant she sells, she can buy the same fund right back — the wash-sale rule doesn't restrict gains, remember — and her new basis resets up to $20,270. She's now holding the same investment, but the government has, in effect, blessed $8,270 of past growth as already-taxed (at 0%). If that fund keeps growing and she sells it years later in a year when she's in the 15% bracket, she'll owe tax on $8,270 *less* gain — a future saving of about 15% × $8,270 ≈ $1,240, bought today for free. Gain harvesting is quietly one of the best deals in the tax code, and it's aimed squarely at people like Nadia.

Nadia's story makes the democratizing point, so let's say it directly: the 0% gain harvest is most powerful for people with *lower* incomes, because the lower your ordinary income, the more 0% room you have. A person between jobs, a graduate student, someone taking unpaid leave, an early retiree living off savings before pensions and Social Security kick in, a business owner in a lean year — these are the people with the *most* room, sometimes tens of thousands of dollars of it. Where a high earner has zero 0% room (their ordinary income already blows past the breakpoint), a modest-income filer can reset the basis on a big chunk of a portfolio at no cost. The wealthy get the headlines; the 0% bracket belongs to everyone else.

But an honest strategy names its catch, and gain harvesting has one worth respecting: a gain taxed at 0% is still income for every other purpose. Realizing it raises your adjusted gross income and your "modified" AGI, even though the tax on it is zero. That higher AGI can quietly cost you elsewhere — it can shrink an Affordable Care Act health-insurance subsidy, raise a retiree's Medicare premiums (the IRMAA surcharge), increase how much of your Social Security is taxable, tip you out of an income-based phase-out, or nudge a college financial-aid formula. None of these undo the 0% rate on the gain itself, but they mean a harvest is a decision to weigh, not a reflex. The move is real and it's free of *income tax*; just check that it isn't quietly moving something else.

Two smaller cautions round it out. First, your state may still tax the gain even when the federal rate is 0% — most states tax capital gains as ordinary income, and a few (like Washington, where Priya and Raj live) have their own capital-gains levy on large gains; "0% federal" is not "0% everywhere." Second, gain harvesting only helps if you actually *have* an appreciated long-term holding in a taxable brokerage account — gains inside an IRA or 401(k) are already tax-deferred, so there's nothing to harvest there. With those checks made, the move is clean: fill the room, rebuy, reset the basis, owe nothing.

Now the move most people have at least heard of, and the one that fits Priya and Raj. Tax-loss harvesting is selling an investment that's worth less than you paid, on purpose, to turn a paper loss into a *realized* loss the tax code will use for you. A paper loss — a holding that's down but that you still own — does nothing on your tax return; the market can cut your position in half and, until you sell, the IRS neither knows nor cares. The instant you sell, that loss becomes a tool. And here's the reframe that dissolves the "this feels like giving up" discomfort: you are not abandoning the investment or admitting defeat. You are converting a temporary dip into a permanent tax benefit, and then — this is the key — getting right back into the market so you don't miss the recovery.

What does a realized loss actually do? It works through the netting order you met in the recap, in a specific sequence. First, losses cancel gains of the same character: long-term losses first offset long-term gains, short-term losses offset short-term gains. Then the two nets combine, so a leftover loss of one type can cancel a gain of the other. If, after all that, you still have a net loss, up to $3,000 of it comes off your ordinary income this year ($1,500 if you're married filing separately) — a cap that has stood unchanged for decades and has never been adjusted for inflation. And whatever loss is *still* left doesn't vanish: it carries forward indefinitely, keeping its short- or long-term character, ready to cancel gains or take another $3,000 bite next year, and the year after, until it's used up. Individuals can only carry losses *forward*, never back to a past year.

Priya and Raj harvest a loss — the worked numbers

Priya (a software engineer, $185,000 plus equity) and Raj (a consultant, about $90,000) file jointly with a combined income over $275,000 and a real taxable brokerage account. In 2026 they rebalanced and, in doing so, sold some long-held winners, booking $40,000 of long-term capital gains they'll owe tax on. They also hold a concentrated position — a sector fund they bought near a peak — that is now deep underwater, sitting on a $55,000 long-term paper loss. Harvesting is almost too tidy here. They sell the losing fund, realizing the $55,000 loss, and net it against everything:

Read the payoff in dollars, because it's large. Those $40,000 of gains weren't going to be taxed at just 15% — Priya and Raj's income is over the $250,000 threshold where the 3.8% Net Investment Income Tax kicks in, so each dollar of long-term gain really faced about 15% + 3.8% = 18.8%. Wiping out the $40,000 of gains therefore saves them 18.8% × $40,000 = $7,520. Then the $3,000 that comes off their ordinary income saves tax at their 24% marginal rate — another $720. So this single harvest cuts their 2026 federal tax by about $8,240, and it *also* banks $12,000 of losses to cut future years' taxes. They spent nothing to get it; they simply sold a position that was already down.

One nuance worth naming so the NIIT saving isn't a black box: the 3.8% tax is charged on the smaller of your net investment income or the amount your income sits above the threshold. Because harvesting a loss *reduces your net investment income* — gains only count "to the extent they aren't offset by losses" — it shrinks that 3.8% base right alongside the ordinary tax. For a higher earner, that's the quiet bonus: every harvested dollar of loss is working against two taxes at once. (We'll meet the NIIT in full in its own lesson; here it's just the reason Priya and Raj's harvest is worth 18.8% a dollar, not 15%.)

Here's the fear that keeps people from harvesting losses at all: "What if I sell for the loss, buy back in, and it turns out I broke a rule and ruined everything?" That rule is the wash-sale rule, and it's worth learning precisely, because once you know exactly where the tripwire is, you can walk right up to it and harvest with total confidence. The rule is narrow and mechanical — it is not a trap that springs on the unwary; it's a clearly drawn line.

The rule, from IRS Publication 550 and the statute behind it (Internal Revenue Code §1091): if you sell a stock or security at a loss, and within 30 days before or 30 days after that sale you buy a substantially identical stock or security, the loss is disallowed for now — the IRS calls it a wash sale. Count the window carefully: 30 days before the sale, the sale day itself, and 30 days after is a 61-day window in total. Buy the same thing back inside that window and you can't claim the loss on this year's return. Note the two words that do all the work: it only applies to a loss (gains are free), and only to a substantially identical replacement.

Now the reassurance that changes how the whole thing feels — and it's the single most important thing to know if you're afraid of getting this wrong. A disallowed loss in a normal taxable account is not lost. It is deferred. When a wash sale disallows your loss, the tax code doesn't burn it; it adds the disallowed loss to the basis of the replacement shares and lets the old holding period carry over. Picture Raj selling 100 shares for a $4,000 loss (he paid $10,000, sold for $6,000), then buying 100 shares back just 10 days later for $6,000. Wash sale: the $4,000 loss is disallowed *this year*. But that $4,000 is added to his new shares' basis, so instead of a $6,000 basis he has a $10,000 basis — meaning when he eventually sells for, say, $11,000, his gain is only $1,000, not $5,000. The $4,000 came back to him. He didn't lose the deduction; he just has to wait for it. A wash sale in a taxable account is a timing annoyance, not a catastrophe.

The four quiet ways people blow it

Almost nobody trips the wash-sale rule by obviously rebuying the same stock the next day — they know better. They trip it in the corners, where a purchase they didn't think of as a purchase lands inside the 61-day window. Here are the four:

1. A repurchase in your IRA or Roth IRA. As above — this is the worst one, because the loss is permanently forfeited, not merely deferred. The IRS explicitly counts an IRA purchase of substantially identical shares as your purchase.
2. A spouse's account. The rule reaches across a married couple: if you sell at a loss and your spouse (or a company you control) buys the substantially identical security inside the window, it's still a wash sale. The IRS treats the household as one for this. Coordinate harvests with your spouse's accounts, not just your own.
3. An auto-reinvested dividend (a DRIP). This is the sneakiest. If a fund or stock you're harvesting pays a dividend that's set to automatically reinvest, that reinvestment is a *purchase* of the same security — and if it lands within 30 days of your loss sale, it triggers a (usually partial) wash sale on the reinvested shares. A tiny automatic buy can taint part of a large harvested loss. Switch dividends to cash around a harvest.
4. A rebuy in the same account inside 30 days. The plain-vanilla version: you sell for the loss, then get nervous and buy the same fund back three weeks later. Wash sale. The fix is either to wait past day 31 or — far better — to buy a *different, not-substantially-identical* fund immediately so you're never out of the market.

That leaves the one genuinely gray area: what counts as substantially identical? Publication 550 is clear on the easy cases — the stocks of two *different* companies are "not ordinarily" substantially identical, so selling one company's shares at a loss and buying a competitor's is fine, and (the reason "stay invested" works) selling one fund and buying a *different* fund is generally fine. The unsettled case is two index funds that track the *same* index — say two different sponsors' S&P 500 funds. The IRS has never ruled on it, so cautious investors treat same-index funds as risky and reach for a fund tracking a *different* index (a total-market fund instead of an S&P 500 fund) to be safely clear. When in doubt, make the replacement genuinely different, not a near-clone.

Both harvests share a hidden lever most people never touch, and it can swing your taxable result by thousands of dollars on the *very same sale*. When you've bought the same investment more than once — a bit each month, or in a few lump sums — you own several lots, each with its own purchase date and its own basis. When you sell only part of your position, *which lot you're deemed to sell* decides the gain or loss you report. And you usually get to choose, if you speak up in time. That choice is called specific identification.

The default, if you say nothing, is FIFO — first in, first out — so the broker sells your *oldest* shares first. Those are often your lowest-basis, biggest-gain shares, which is frequently the worst possible choice at tax time. The alternative is to specifically identify the lot you want sold: you tell your broker, at or before the sale, exactly which shares to sell (by purchase date and price), and the broker confirms it in writing. (A separate method, average cost, pools your basis and is available for mutual-fund and dividend-reinvestment shares — convenient, but it gives up this control.) Specific identification is how you sell the high-basis lot to *shrink* a gain, or the deepest-underwater lot to *harvest the biggest loss*.

Watch the size of the swing with Priya's fund. She built a position in three lots, and the shares are now worth $90 each:

If Priya needs to sell 100 shares and says nothing, FIFO hands her Lot A and a $5,000 taxable gain — the opposite of what she wants. If instead she specifically identifies Lot C, the same 100-share sale produces a $6,000 harvestable loss. That's an $11,000 difference in her taxable result, from nothing but choosing the lot — the single highest-leverage habit in this entire lesson. The rule to carry: when you sell part of a holding, never let the default choose for you. Identify the lot that serves your plan — the high-basis lot to avoid a gain, the low-basis lot to fill a 0% harvest, the deepest-loss lot to harvest.

One more lever, and it's about *when* you sell, not what. The gap between short-term and long-term treatment is enormous: a short-term gain (held one year or less) is taxed at your ordinary income rate — as high as 37% — while a long-term gain (held more than a year) gets the gentle 0/15/20% rates. Sometimes you're sitting on a winner you've held for eleven months, and simply *waiting a few more weeks* to cross the one-year line converts the whole gain from ordinary rates to long-term rates. That's holding-period management.

Two details make it precise. First, the clock starts the day after you bought — so "more than one year" means you need one year plus one day; selling on the exact anniversary is still short-term. Second, the saving can be big. Suppose Priya holds a stock with a $10,000 gain and has owned it for eleven months. Sell now and it's short-term, taxed at her 24% ordinary rate plus the 3.8% NIIT — about 27.8%, or $2,780. Wait 32 more days to cross into long-term, and the same gain is taxed at 15% plus 3.8% — 18.8%, or $1,880. Those 32 days of patience are worth $900.

Chad Molina trades cryptocurrency alongside his software-QA job in Denver, and his world has a quirk that stops harvesters in their tracks when they first hear it: the wash-sale rule does not apply to crypto. Not "applies loosely" — it genuinely doesn't reach it, for tax year 2026. The reason is a technicality in the statute. The wash-sale rule (§1091) is written to cover "stock or securities." The IRS has classified cryptocurrency as property, not a security (going back to Notice 2014-21). Property isn't "stock or securities," so the rule simply doesn't apply. Chad can sell Bitcoin at a loss, harvest that loss in full, and buy it back the same minute — no 61-day window, no waiting, no substantially-identical worry.

That makes crypto loss-harvesting unusually clean: in a volatile down week, a crypto investor can realize losses to offset gains (and $3,000 of ordinary income, and carry the rest forward) without ever giving up their position or their upside. It's the one corner where you get the loss *and* stay in the exact same asset with no gap.

All of this eventually lands on paper — on Form 8949 (where each sale is listed line by line) and Schedule D (where those lines are totaled and netted). You don't need to fill these out by hand; software and your broker's records do most of it. But you should be able to *read* the harvesting story on them, because that's how you confirm your harvest worked, how you'd catch a broker's wash-sale adjustment, and how you'd track a carryover to next year. Let's read a sample built from Priya and Raj's harvest, with the specific-ID lots, the wash-sale code, and the carryover line all visible.

Walk it top to bottom, the way you'd check your own. Form 8949, Part II (long-term) lists each sale: the description, the dates acquired and sold, the proceeds, and the cost basis — and because Priya used specific identification, the basis shown is the exact lot she chose, not FIFO's. Any sale caught by a wash sale gets a code "W" in column (f) and the disallowed loss entered as a positive adjustment in column (g), which mechanically adds it back so it isn't deducted this year — that column is where a wash sale becomes visible on the return. Schedule D then carries the Form 8949 totals into Part II (long-term), combines them with any short-term results from Part I, and reaches the net figure on line 16 — here a −$15,000 loss. From there two things happen: line 21 sends the allowed $3,000 over to Schedule 1 and the 1040 to reduce ordinary income, and the Capital Loss Carryover Worksheet computes the $12,000 that rolls to 2027, keeping its long-term character on next year's Schedule D. Every number we computed by hand is sitting on these two forms — which is exactly how you'd verify a harvest really happened.

Harvesting is legitimate, but it lives next door to a few real dangers — some are honest mistakes the IRS will catch, and some are pitches designed to fool you. You don't need to memorize them; you need the tells and one protective rule.

Maybe this lesson landed with a small jolt of recognition — you sold something at a loss last year and bought it right back, or your IRA was quietly auto-investing while you harvested in your brokerage account, or you just filed and now you're not sure the loss you claimed was allowed. Take a breath. The rules here are genuinely intricate — the wash-sale rule catches full-time investors and even tax pros — and getting one wrong doesn't mean you cheated or that you're in trouble. It means you did something the system never explained, and almost all of it is fixable.

The most important reassurance is the one from the wash-sale section, and it bears repeating because it's the exact thing people panic about: in a normal taxable account, a disallowed loss is not lost — it's added to your replacement shares' basis, so it comes back to you when you eventually sell. You didn't set fire to the deduction; you deferred it. Here's what to do depending on what happened:

• You triggered a wash sale in your brokerage account. Usually nothing dramatic is required — your broker likely already applied the adjustment on your 1099-B, adding the disallowed loss to your new shares' basis. If you claimed the loss anyway and it should have been disallowed, file an amended return (Form 1040-X) to correct it; the loss isn't gone, it's just deferred into your basis.
• The repurchase was in your IRA. This is the hard one — that loss is permanently disallowed. There's no way to recover it, but there's a lesson to bank: pause IRA auto-invest around future harvests. Going forward you'll never repeat it, and one lost loss is a tuition payment, not a disaster.
• A wash sale came from an auto-reinvested dividend. Often only a small slice of your loss is affected (just the reinvested shares). Amend if you claimed the full loss, and switch that holding's dividends to cash before your next harvest.
• A notice arrived (a CP2000) because a claimed loss was disallowed. This is a computer match, not an audit — it proposes a change and gives you a specific window to agree or explain. Often the fix is simply agreeing and paying a small difference, or showing that the basis adjustment already handled it. Opening it is far less painful than the imagined version.

And if you *missed* a harvest you could have made — a 0% gain-harvest year that came and went, a loss you never booked — that's not a mistake to grieve, just a strategy to remember next time. Losses you already have carry forward indefinitely, waiting for you. The worst outcome in this whole area isn't a wash sale; it's never learning the moves at all. You're past that now.

Harvesting help has a natural ladder, and the good news is that the first two rungs are free and probably already yours. Most people never need a paid professional for a straightforward harvest; the records you need are sitting in your brokerage account. Here's the stack, most accessible first.

1. Your broker's realized gain/loss and wash-sale reports — start here. Every major brokerage gives you a running realized gain/loss report, a cost-basis view with your lots, a lot-selection tool for specific identification, and a wash-sale column that flags disallowed losses automatically. This is your primary instrument: it tells you your 0% room won't be blown, which lots to sell, and whether a wash sale is brewing. Learn where these live in your account before you harvest.
2. IRS Publication 550 and the Schedule D / Form 8949 instructions — the free, authoritative source. Pub 550 ("Investment Income and Expenses") is the plain-language rulebook for wash sales, basis, holding periods, and the loss limit; the Schedule D and 8949 instructions walk the mechanics. It's free at IRS.gov and it's what the pros are reading too.
3. A CPA or enrolled agent for a large or complex portfolio. When you're coordinating harvests across many accounts, holding concentrated or illiquid positions, dealing with equity compensation, or your harvest interacts with the AMT, NIIT, or a business, a professional who does this earns their fee — this is one of the clearer cases where paid advice pays for itself. Look for someone who'll model the harvest, not just record it after the fact.
4. The Taxpayer Advocate Service (TAS) if a harvest error becomes an IRS dispute you can't resolve. If a disallowed-loss notice spirals, or you're facing a hardship while trying to fix a return, TAS is the free, independent IRS office that helps when normal channels stall. It's the backstop, not the first stop — but it's there.

The same handful of harvesting questions come up again and again. Quick, plain answers, each pointing back to where the fuller story lives in this lesson.

• Can I really pay 0% tax on an investment gain? Yes — if your total taxable income (after your deduction) plus the gain stays under the 0% breakpoint ($49,450 single, $98,900 married filing jointly for 2026). Your ordinary income fills the space first; the gain that still fits below the breakpoint is taxed at 0%. It's a permanent bracket, aimed at modest incomes.
• I sold at a loss and rebought — did I ruin it? Probably not, and even if it's a wash sale, in a taxable account the disallowed loss is added to your new shares' basis and comes back when you sell. The only version that's permanently lost is a repurchase inside an IRA. Rebuying a *different* (not substantially identical) security is always fine.
• How long do I have to wait to buy back in? For a loss, avoid buying the substantially identical security for the full 61-day window (30 days before through 30 days after). But you don't have to sit in cash — buy a similar-but-different fund immediately and you're invested the whole time. For a gain, there's no waiting period at all; buy it right back.
• Which shares should I sell? Whichever lot serves your goal — use specific identification, not the FIFO default. Sell the highest-basis (smallest-gain or biggest-loss) lot to harvest a loss or avoid a gain; sell a low-basis lot to fill a 0% gain-harvest year. Tell your broker before the sale.
• Does harvesting a loss help my regular paycheck income? A little, directly: after losses cancel your capital gains, up to $3,000 of leftover loss comes off your ordinary income each year, and the rest carries forward. So yes, but it's capped at $3,000 a year against wages.
• Do capital losses ever expire? No. Unused losses carry forward indefinitely, keeping their short- or long-term character, until you use them up. (Individuals can't carry them *back* to past years, only forward.)
• Is a big refund from harvesting free money? No — much of a loss harvest's value is deferral, not elimination: booking a loss today often lowers your basis or offsets a gain you'd have paid later anyway. It's real and worth doing, especially for higher earners facing the extra 3.8% NIIT, but treat it as smoothing and shifting tax, not erasing it.
• My income is too high for the 0% bracket — is gain harvesting useless for me? For the 0% move, yes — if your ordinary income already exceeds the breakpoint, there's no 0% room. But loss harvesting is *more* valuable the higher your income, because your gains (and the 3.8% NIIT) are taxed harder, so each harvested loss saves more.
• Crypto — same rules? Not for the wash-sale rule: crypto is treated as property, so for 2026 there's no wash-sale restriction — you can sell a coin at a loss and rebuy instantly. That could change if Congress acts, so re-check each year; the full crypto picture is its own lesson.
• Should I harvest just because the market dropped? Only if it fits your plan. Harvesting a loss is worth doing when you have gains to offset or income to reduce and you can stay invested through a replacement — but don't sell a good long-term holding purely to book a loss if it complicates your portfolio or risks a wash sale. The tax tail shouldn't wag the investment dog.

You've seen both moves worked out — Nadia's 0% gain harvest and Priya and Raj's loss harvest. Now run your own numbers. The modeler below lets you pick either harvest. For a gain harvest, enter your filing status, your ordinary taxable income, and a gain you're thinking of realizing; it shows your 0% room and how much of the gain lands at 0% versus 15%. For a loss harvest, enter your realized gains and the loss you'd book; it shows what cancels, the $3,000 that comes off ordinary income, your carryover, and a rough tax saved — with a wash-sale reminder built in. It's pre-filled with Nadia's and Priya & Raj's exact figures so you can confirm the lesson's math, then clear it for your own.

As you experiment, watch two things. In gain mode, raise your ordinary income and watch the 0% room shrink to nothing — that's why a low-income year is the opportunity. In loss mode, notice how the first dollars of loss are worth the most (they cancel gains taxed at 15% or 18.8%), while everything past your gains plus $3,000 just becomes a carryover — valuable, but only next year. This is a teaching estimate that uses the 2026 federal brackets and skips state tax and the finer edges, but it makes the shape of your own harvest visible, which is the whole point.

Every term this lesson introduced, in one place — the vocabulary of deliberate harvesting.

• Harvesting — deliberately triggering a sale for its tax result (not because you need the money), then usually getting back into a similar position so you stay invested.
• Tax-loss harvesting — selling an investment that's down to realize a capital loss, using it to offset realized gains and up to $3,000 of ordinary income, and carrying the rest forward — while buying a not-substantially-identical replacement to stay in the market.
• Gain harvesting (basis reset) — in a low-enough-income year, deliberately realizing a long-term gain that falls in the 0% capital-gains bracket, paying $0 tax, and rebuying to step your cost basis up so a future sale is smaller.
• 0% capital-gains bracket — a permanent long-term-gains rate of 0% for taxable income up to a breakpoint ($49,450 single / $98,900 married filing jointly for 2026); the basis of gain harvesting.
• Stacking — the rule that ordinary income fills the brackets first and long-term gains sit on top, so your 0% room equals the 0% breakpoint minus your ordinary taxable income.
• Wash-sale rule (§1091) — disallows a loss if you buy a substantially identical security within 30 days before or after the loss sale (a 61-day window); the disallowed loss is added to the replacement's basis (deferred), except in an IRA, where it's permanently lost.
• Substantially identical — the wash-sale rule's test for a replacement: the same security (or same-index fund) is caught; a different company's stock or a different-index fund generally is not. The same-index-fund case is an unsettled gray area.
• Specific identification (specific-ID) — telling your broker exactly which lot of shares to sell (by date and price) at or before the sale, so you control the gain or loss — versus the FIFO default, which sells your oldest shares first.
• Lot — a batch of shares bought at one time and price, with its own basis and holding period; a holding built over time is made of several lots.
• Holding-period management — timing a sale to cross the more-than-one-year line so a gain is taxed at long-term (0/15/20%) rather than short-term (ordinary) rates; the clock starts the day after purchase.
• Capital-loss carryover — unused net capital loss above the $3,000 annual ordinary-income limit, carried forward indefinitely (keeping its short- or long-term character) to offset future gains and income.
• Net Investment Income Tax (NIIT) — an extra 3.8% tax on investment income for filers over $250,000 married filing jointly / $200,000 single (not inflation-indexed); harvesting a loss reduces the income it applies to.