Nonresident-alien taxation

Here is the fear, said plainly: “I worked in the United States, I earned this benefit — and now that I live abroad, a chunk of it disappears before it ever reaches me.” For someone on a fixed income, far from the office that pays them, that is a real and heavy worry. This lesson meets it head-on, then hands you the one lever that can change the answer.

We follow Fatou, Amara Diallo’s mother, age 70. She worked about a decade in the United States, earned her retirement benefit, and then went home to Dakar, Senegal. She is now a nonresident alien — a non-citizen living outside the US — collecting the benefit she earned. Amara, back in the Bronx, keeps noticing the check is smaller than the letters said it would be, and wants to understand why.

The short version, which we will build carefully: for a nonresident alien, 85% of the benefit is taxed at 30%, which works out to a flat 25.5% withheld from every payment — unless a tax treaty in the country where you live lowers or eliminates it. So two things are true at once: the default takes a real bite, and where you live can change everything. The rest of the lesson is those two truths, in full.

The whole tax result turns on one label. A nonresident alien is, for tax purposes, a person who is not a US citizen and does not count as a US resident for the year. If you are a US citizen living abroad, you are not a nonresident alien — you keep being taxed like a resident. Fatou is a non-citizen who now lives permanently in Senegal, so she is a nonresident alien. That single word is what routes her to the flat rule instead of the resident rule.

How is that status actually determined? Broadly, someone is a resident for tax if they are a lawful permanent resident (a green-card holder) or meet the day-count “substantial presence” test; otherwise they are a nonresident alien. The full mechanics — the tests, the exceptions, dual-status years — are named here but taught in depth in the taxes track, because they can get intricate. For Social Security’s purposes, the practical trigger is simpler, and worth memorizing.

For Fatou, who moved home and stayed, that six-month line was crossed long ago. So from here on, her benefit is taxed under the nonresident-alien rule — and the next section is exactly what that rule is.

Here is the rule with nothing hidden. For a nonresident alien, 85% of the benefit is treated as taxable, and that portion is taxed at a flat 30%. Multiply the two and you get the number that actually matters on the check: 0.85 × 0.30 = 0.255, an effective 25.5% withheld from the whole benefit, every payment.

Now put Fatou’s numbers through it. Her monthly benefit is $1,200 — an illustrative figure for this lesson (a modest amount reflecting about a decade of covered work; the reader’s own benefit is never computed here). 85% of $1,200 is $1,020 subject to tax. 30% of $1,020 is $306, withheld each month. And $306 is exactly 25.5% of $1,200 — the two ways of figuring it always agree. What lands in Fatou’s account is $1,200 − $306 = $894 a month.

Notice what the rule does not ask. It does not ask how much other income Fatou has. It does not ask her to fill in a worksheet. It does not care what tax bracket she would be in. It is a flat slice off the top — which is what makes it feel so blunt, and why the next section matters: it is nothing like the tax a resident pays.

A reader who just finished Lessons 88 and 89 might assume this is the same tax, moved overseas. It isn’t. They share three words — “tax on benefits” — and almost nothing else. The difference is worth seeing side by side, because it explains why a benefit that would be taxed lightly or not at all for a US resident is cut by a quarter for a nonresident alien.

The resident rule is conditional. You add up provisional income (your other income plus half your benefits). Below $25,000 single / $32,000 joint, none of your benefits are taxed. Above those tiers, up to 50% and then up to 85% of the benefits are included in your taxable income — and that included amount is taxed at your ordinary marginal bracket (10%, 12%, 22%…). Because of the thresholds, a modest-income retiree can owe $0.

The nonresident-alien rule is unconditional. There is no threshold to sit under, no worksheet, and no bracket. It is a flat 25.5% from the first dollar. A nonresident alien with a small benefit still loses a quarter of it; a US resident with the same small benefit might lose nothing. Same program, same check — opposite machinery.

So the honest headline is not “abroad you pay more tax.” It is “abroad you pay a flat rate instead of a graduated one” — and for many people that flat rate lands harder. Which raises the obvious question: is there anything that changes it? There is exactly one thing.

A tax treaty is an agreement between the United States and another country about how each will tax the other’s residents. For Social Security benefits, some treaties do something powerful: they reduce or eliminate the nonresident-alien withholding. That means the rate a person actually pays depends on the country they live in — not on the benefit itself.

For Social Security specifically, the SSA recognizes a defined list of countries whose treaties fully exempt benefits — the withholding drops to 0% and the entire check arrives. As of 2026 that list is Canada, Egypt, Germany, Ireland, Israel, Italy, Japan, Romania, and the United Kingdom. Some carry conditions — Italy, for example, generally requires that you also be a citizen of Italy. And the US has treaties with other countries that do not exempt Social Security, so the presence of a treaty is not enough; it must be one that covers these benefits.

How is relief claimed? You certify your country of residence to the payer, typically on Form W-8BEN (Certificate of Foreign Status), which goes to SSA or the withholding agent directly. It is free. No one charges a fee to apply a treaty — a promise worth holding onto, because it is the exact tell in the scam we cover shortly.

It would be easy to end on the hopeful note — “check for a treaty!” — and leave the people it doesn’t help behind. We won’t. For Fatou, there is no US–Senegal income-tax treaty at all, let alone one that exempts Social Security. So the relief simply is not available to her, and the full 25.5% default applies.

That means her numbers are exactly the ones we computed: $1,200 benefit, $306 withheld, $894 in hand each month — $3,672 withheld over the year. No treaty, no worksheet, no way to dial it down under today’s rules. Saying so plainly is more respectful than pretending a lever exists where it doesn’t.

And yet plenty is still true and still worth doing. The benefit is hers, still paid, and still COLA-adjusted each January. Amara can help by confirming her mother’s residence and mailing details are current with SSA, by keeping each year’s SSA-1042S for any filing, and by checking — honestly — whether Fatou might one day reside in a treaty country. And she can guard the one real danger: no one can “recover” the withholding for a fee. That offer is always a scam.

Every January, residents get an SSA-1099 summarizing the year’s benefits for tax season (walked box-by-box in Lesson 89). Nonresident aliens get its sibling: the SSA-1042S. It reports the benefits paid and the tax withheld at the nonresident rate. It is the document that proves what was taken — the paper version of the 25.5% story.

We show the SSA-1042S lightly here — the boxes that matter, not a full field-by-field walkthrough — because L92’s job is the tax rule, not the form. For Fatou it would show roughly $14,400 in benefits paid, a 25.5% nonresident-alien rate, and $3,672 withheld, with Senegal as the country of residence. Keep it; it is what a tax preparer or a treaty claim will ask for.

It is a common and costly mix-up to hear “25.5% withheld” and think the benefit is being stopped. It isn’t. The money is being paid and taxed. Whether it can be paid at all in a particular country is L139’s territory — and a few countries do bar payment entirely, which is exactly why the two lessons are neighbors.

This lesson’s danger is tailor-made from its fear. Scammers know that people abroad — and their families back home — are worried about that missing quarter of the check. So the con is simple: “We can recover the Social Security tax withheld from your benefits abroad — just pay a fee first.” It targets nonresident-alien beneficiaries and, very often, the US relative who feels responsible.

Hold onto the tell, because it cuts through every version: treaty relief is claimed through official channels for free — no one recovers your withholding for a fee. Real relief comes from filing a W-8BEN or contacting SSA, at no cost. Anyone asking for an upfront “recovery” or “filing” fee — especially in gift cards, wire, or crypto — is running a scam, no matter how much they know about your case.

Set the fear down for a moment. The withholding is not a penalty, not a mistake, and not something you did wrong. It is a default rule for nonresident aliens — and defaults can have exceptions. Nothing here means the benefit is being taken away; it means part is withheld for tax, and there is a real, free way to check whether that rate has to be your future.

The single most useful thing you can do is check whether your country of residence has a treaty that lowers or eliminates it — a treaty country can take the rate to 0%. And the honest doors for that are free: SSA, a US embassy’s Federal Benefits Unit (which serves people living abroad), and, for filing, a cross-border tax professional. None of them charge a “recovery fee.” For Fatou, the treaty door happens to be closed today — but she still receives her earned, COLA-adjusted benefit every month, and Amara has real doors to knock on.

How is my benefit taxed if I live abroad as a non-citizen? Under the nonresident-alien rule: 85% of the benefit is subject to a 30% tax, an effective 25.5% withheld from every payment — a flat rate, from the first dollar.

Is there any way to lower it? Yes — a tax treaty in your country of residence. Some treaties reduce or eliminate the withholding, taking it as low as 0%. It is the one real lever.

Does my country have a treaty? You have to check — it is country-specific. SSA’s recognized exempt list includes Canada, Egypt, Germany, Ireland, Israel, Italy, Japan, Romania, and the UK. Senegal is not on any such list (and has no US tax treaty at all), so Fatou faces the default.

What document reports it? The SSA-1042S — the nonresident version of the SSA-1099. It shows the benefits paid and the tax withheld. Keep it for any filing or treaty claim.

Is this the same as the tax residents pay? No. Residents face a graduated rule with thresholds and brackets (Lessons 88–89), where a modest income can owe $0. The nonresident-alien rule is a flat 25.5% with no thresholds. Different machinery entirely.

Does living abroad also affect whether I get paid at all? Sometimes — but that is a separate question, covered in Lesson 139. A few countries bar payment; most don’t. Being taxed abroad and being paid abroad are two different rules that happen to share the six-month clock.

When does the nonresident rate kick in? Generally once you have been outside the US for six full calendar months in a row, at which point SSA treats you as a nonresident alien for this withholding.

Put the rule in your hands. The calculator below takes a monthly benefit and a treaty status and shows, live, the 85% taxable share, the amount withheld, and the net check — plus the yearly totals. It starts on Fatou’s numbers so you can watch $306 come out of $1,200 and $894 arrive, then flip the treaty status to see how the country of residence moves the result.

Two things to try: switch to “Treaty country (exempt)” and watch the withholding fall to $0 with the full $1,200 arriving — that is what a treaty can do. Then remember the guardrail: this illustrates our example, never your own benefit. For your actual numbers, look at your my Social Security Statement, and for treaty and filing questions, talk to SSA, a Federal Benefits Unit, or a cross-border tax professional.

• Nonresident alien (NRA), for tax — a person who is not a US citizen and does not count as a US resident for the year; the label that routes a beneficiary to the flat withholding rule.
• The 85% × 30% = 25.5% rule — 85% of a nonresident alien’s benefit is subject to a 30% flat tax, an effective 25.5% withheld from every payment; statutory (IRC §871(a) and §86), not COLA-indexed.
• Tax treaty — an agreement between the US and another country; some treaties reduce or eliminate (to 0%) the nonresident-alien withholding on Social Security benefits.
• Form W-8BEN — the Certificate of Foreign Status a beneficiary files to certify residence and claim treaty relief — for free.
• SSA-1042S — the nonresident version of the SSA-1099; the yearly statement reporting benefits paid and tax withheld to a nonresident alien.
• Federal Benefits Unit (FBU) — the office at many US embassies/consulates that serves Social Security beneficiaries living abroad.
• Provisional (combined) income — the resident-rule measure (other income + half of benefits) that decides how much of a US resident’s benefit is taxed (Lessons 88–89); it has no role in the nonresident-alien rule.