Section 218 agreements (whether public employees are covered at all)

Linda Nakamura spent thirty years in front of a classroom in Sacramento. She knows her CalSTRS pension almost to the dollar. What she couldn't answer — and what quietly worried her for years — was simpler and more basic: *“Did my teaching job pay into Social Security at all? And if it didn't, how was I ever supposed to know?”* That is the fear this lesson is built to answer, and it belongs to millions of public workers — teachers, firefighters, police officers, city and state employees — who genuinely don't know which side of the line their paycheck sits on.

Here is the honest, reassuring shape of the answer before we build it out. Whether a public job pays into Social Security is not random, and it's not a mystery you're expected to solve from memory. It comes down to two things: whether your state signed a Section 218 agreement covering your kind of job, and — if it didn't — whether a 1991 safety-net rule pulls you in anyway. And you can check which one applies to you in about five minutes, using paper you already have. Nobody has to guess.

Start with a piece of history that explains everything downstream. When Social Security began in 1935, it deliberately left state and local government workers out — there were constitutional worries about the federal government taxing the states. So for the program's first fifteen years, a teacher or a county clerk simply could not pay into Social Security, even if they wanted to.

The fix arrived in the 1950 Social Security Amendments, which added Section 218 to the Social Security Act. Since January 1, 1951, a state can voluntarily bring its public employees into Social Security by signing a Section 218 agreement — a formal, voluntary agreement between the state and the Social Security Administration. That's the whole definition, and it's worth saying plainly: a Section 218 agreement is the document by which a state chooses to extend Social Security coverage to its public workers. No agreement, no coverage-by-this-route — which is exactly why coverage for public jobs is a patchwork instead of a single national rule.

• It's voluntary. The federal government didn't order states in; it offered a door. Each state decided which of its public workers to bring through it, and when.
• It covers Social Security *and* Medicare. A Section 218 agreement can provide both Social Security and Medicare Hospital Insurance (HI) coverage, or in some cases Medicare-HI-only — a distinction that matters when you read your pay stub later.
• It grew in stages. Originally (1951) agreements could only cover employees not already in a public retirement system. The 1954 Amendments opened a second door: a state could bring in employees who *are* in a retirement system, but only if that group votes for coverage in a referendum.

The scale of adoption surprises people: every one of the 50 states, plus Puerto Rico, the Virgin Islands, and about 60 interstate instrumentalities, has a Section 218 agreement with Social Security. So the honest headline isn't *“some states have agreements and some don't.”* Every state has one. The real question — the one that decides Linda's case and yours — is which workers each state's agreement actually covers. That's the next section, and it's where the confusion lives.

Here is the single most misunderstood fact in the whole topic, and getting it straight makes everything else click. A Section 218 agreement does not flip a whole state to “covered” in one move. Instead, a state brings in its workers one group at a time — SSA calls these coverage groups — and the agreement covers only the groups the state actually named. A state can cover its city sanitation workers and county nurses while leaving its teachers out entirely, all under the same statewide agreement.

So the sentence *“California has a Section 218 agreement”* is true and almost useless on its own. California does have one — every state does. What matters is whether your position was ever placed into a covered group under it. This is why “I work for the government” tells you nothing, and why even “my state signed an agreement” tells you nothing. You have to get down to the level of your job, your employer, and your retirement system.

• Absolute coverage groups — positions not under a public retirement system. These were the original 1951 doorway and are the simplest to bring in.
• Retirement system coverage groups — positions that are under a public retirement system. Since 1954, a state can cover these too, but the affected employees generally must vote for it in a referendum first. No successful vote, no coverage for that group.
• Later modifications — a state can amend its agreement over the decades to add new groups. So coverage can also be a matter of timing: a district covered in 1975 and one that never held a referendum can sit side by side.

Now Linda's case is no longer a mystery — it's a clean example of the rule. California has a Section 218 agreement, and it covers plenty of the state's public workers. But Linda's teaching position sits under CalSTRS, and her district's teachers were never brought into a covered group under that agreement — no referendum ever put them in. Same state, same agreement, and yet her thirty classroom years were non-covered: no Social Security tax, no Social Security credits. A teacher one district or one state over, whose group *did* hold a covering referendum, pays in for the identical work.

If coverage depended only on whether your exact group was ever voted into a Section 218 agreement, huge numbers of public workers would fall through the cracks with no retirement protection at all. So Congress built a floor. Since July 2, 1991 (from the Omnibus Budget Reconciliation Act of 1990), there's a mandatory-coverage default: a state or local government employee who is not a member of a qualifying public retirement system is covered by Social Security automatically — Section 218 agreement or not.

Read that carefully, because the logic is the reverse of what most people assume. The default for a modern public job is covered. You only escape Social Security if you clear both exits at once: you're in a qualifying retirement system *and* your group was never brought into a Section 218 coverage group. Miss either one — no qualifying pension, or a 218 group that covers you — and you're paying into Social Security like everyone else.

1. In a Section 218 coverage group? → Covered. The state chose to bring your job in. Social Security tax applies; credits accrue.
2. Not in a 218 group, but no qualifying retirement system either? → Covered by the 1991 default. The safety net catches you.
3. Not in a 218 group and in a qualifying retirement system? → Non-covered. This is the only combination that keeps a public job out of Social Security — and it's Linda's.

What makes a retirement system “qualifying” for this purpose? It has to meet minimum standards — a defined-benefit plan that provides benefits comparable to Social Security, or a defined-contribution plan meeting a minimum contribution level (a common safe-harbor benchmark is total contributions of at least 7.5%). The point isn't to memorize the threshold; it's to see the fairness behind the rule: a public job can only skip Social Security if it offers a real pension in its place. Non-covered was never meant to mean unprotected.

Put a real working life next to the rule. Linda's career has two halves that landed on opposite sides of the line. Before she ever taught, she spent 12 years in private-sector jobs — covered work, Social Security tax out of every check. Then came 30 years of teaching under CalSTRS — non-covered, for the reason we just traced: a qualifying pension, and no Section 218 coverage group that included her. Twelve covered, thirty non-covered, 42 working years in all.

And here's the part that answers Linda's original fear head-on. At up to 4 credits a year, those 12 covered years could have earned as many as 48 credits — comfortably past the 40 that make a worker fully insured (Lesson 15). So Linda has a Social Security retirement benefit of her very own, built entirely from that early private-sector decade. Her thirty non-covered teaching years didn't add to it — but they never erased it either. *The twelve years count, and they always did.* Meanwhile the thirty years weren't wasted: they built her CalSTRS pension, a whole separate retirement.

There's a concrete piece of paper at the center of non-covered public work, and if you started a non-covered government job in the last two decades, you signed one — probably without registering what it was. It's Form SSA-1945, titled “Statement Concerning Your Employment in a Job Not Covered by Social Security” Federal law (Section 419(c) of Public Law 108-203, the Social Security Protection Act of 2004) requires a public employer to give this form to — and collect a signature from — every new hire in a non-covered position, for hires on or after January 1, 2005.

What it does is simple and honest: in writing, on day one, it tells you this particular job won't pay into Social Security, so you won't earn Social Security credits on these wages — and, historically, it warned that a pension from this work could reduce your other Social Security through WEP and GPO. It isn't a bill and it isn't a benefit application; it's a disclosure, designed so no public worker is blindsided years later. Linda's own hiring predates the 2005 requirement, so she never signed one — but every teacher who joined her district since does.

• The masthead & title — “Social Security Administration · Statement Concerning Your Employment in a Job Not Covered by Social Security.” Seeing this title at all means the employer is treating the job as non-covered.
• The employer & position block — who you work for and the job. This is the level at which coverage is actually decided — the employer and coverage group, not “the state.”
• The core statement — that your earnings from this job are not covered under Social Security, and you will not earn credits on them. This is the load-bearing sentence.
• The historical WEP/GPO warning — that a non-covered pension could reduce your other Social Security. On the March 2025 edition this is updated to reflect that both were repealed — the warning no longer bites.
• Your signature & date — you sign only to acknowledge you received the explanation. It doesn't waive anything and doesn't change your coverage; it's a receipt.

You do not need to know your state's referendum history by heart. For almost anyone, five ordinary places will answer *“is this job covered?”* — and any one of them usually settles it. This is the part to keep after the lesson ends.

1. Your pay stub. Look for a Social Security, FICA, or OASDI deduction. If Social Security tax is coming out, the job is covered, full stop. If you see Medicare only — a Medicare line but no Social Security/OASDI line — that's a strong signal the job is non-covered (remember Medicare-Qualified Government Employment). Neither line at all can mean an older non-covered job.
2. Your Social Security Statement / earnings record. Covered years show reported earnings; non-covered years show as zeros or gaps, because nothing was ever reported to Social Security. Reading that record line by line is Lesson 16; getting the free my Social Security account is Lesson 11.
3. Your HR or payroll office. A public employer can tell you directly whether your position is in a Section 218 coverage group and whether your retirement system is treated as qualifying. This is the fastest authoritative answer.
4. The SSA-1945 you may have signed. If you were handed and signed one when you started (hires since 2005), that signed form is paper-trail proof the position is non-covered.
5. Call Social Security — 1-800-772-1213. SSA can confirm your coverage and read your earnings record with you, at no cost. This lesson never predicts your benefit; it points you to where the real answer lives.

It's tempting to treat non-covered public work as a rare corner case. It isn't. According to the Social Security Bulletin (Vol. 80, No. 3, 2020) — SSA's own peer-reviewed research journal, in an article by Quinby, Aubry, and Munnell — “In 2018, one-quarter of state and local government employees — approximately 6.5 million workers — were not covered by Social Security on their current job.” That's a structural feature of the system, not a footnote. You'll also see it rounded to “about 25–28%” in other write-ups; the precise, sourced anchor is one-quarter, roughly 6.5 million, as of 2018.

That non-coverage is concentrated, not spread evenly — it clusters in particular states and, above all, among teachers and public-safety workers. And this is exactly where you must be careful, because it's where bad information thrives. You will see confident lists online — *“the 15 states where teachers don't get Social Security.”* Treat every such list as illustrative, not official.

Confusion is a scammer's raw material, and few topics are as confusing to the people it affects as public-employee coverage. So a predictable hustle targets exactly the readers of this lesson: *“Your public job isn't in Social Security — for a fee, we'll confirm your Section 218 coverage / get you added / file the paperwork so you start earning credits.”* Sometimes it's pitched as fixing a coverage “error”; sometimes as claiming a refund. It's a scam.

The tell that dismantles the whole thing: your coverage is set by your state's Section 218 agreement and by federal law — not by anyone you can pay. An individual cannot buy their way into Social Security coverage for a non-covered job; only the state, through its agreement (and any required referendum), can extend coverage to a group. And you can check your own status for free — on your pay stub, your Statement, or by calling SSA. Anyone charging a fee to “confirm,” “add,” “restore,” or “expedite” your Section 218 coverage, or asking for your bank login or SSN to do it, is running a scam. If it reaches you, report it — the SSA Office of the Inspector General at oig.ssa.gov, the SSA at 1-800-772-1213, and the FTC at reportfraud.ftc.gov — and know that being targeted after a career in public service is not a mistake you made.

Set the Scam Watch aside — this is the softer note it's distinct from. A lot of public workers carry a quiet, years-long unease about this exact question, and often a second fear layered on top: that a public pension would somehow poison whatever other Social Security they'd earned. If that's you, sit with a few true things before you go.

You can find the answer, and it's free. Nobody expects you to know your district's 1970s referendum history — your pay stub, your earnings record, your HR, and a free call to 1-800-772-1213 will tell you, and this lesson's checklist walks you straight to it. Your non-covered years were not wasted — they built a real pension, a second retirement system working on your behalf; non-covered has never meant unprotected. And the layered fear is genuinely resolved: the old penalties — WEP (on your own benefit) and GPO (on spousal/survivor benefits) — that once cut the Social Security of people with non-covered pensions were repealed in 2025, so a non-covered pension no longer reduces your other Social Security. If you once skipped applying for a spousal or survivor benefit because you were told a public pension would zero it out, that may be worth revisiting now — the mechanics and Linda's numbers are Lesson 97.

Put the whole mechanism to work in one place. Set three switches — your employer type, whether you're in a qualifying retirement system, and whether your job was placed in a Section 218 coverage group — and the tool shows the likely coverage result, *why*, and how to confirm it. It starts pre-filled with Linda's case. It reasons over the rules on example inputs — it never asks for your name, your SSN, or your earnings, and it never predicts a benefit.

The questions public workers and their families ask most about Section 218 and coverage — answered plainly, with 2026 facts.

• Section 218 agreement — the voluntary agreement a state has had available since January 1, 1951 to enter with Social Security, extending Social Security and Medicare coverage to its public employees, group by group.
• Coverage group — the unit a Section 218 agreement covers: a set of positions (an entity, a job class). An agreement covers only the groups the state named — an absolute group (positions not under a retirement system) or a retirement-system group (brought in by referendum).
• Referendum — the vote required, since the 1954 Amendments, to bring a group of retirement-system members into Social Security coverage under a Section 218 agreement.
• Mandatory coverage — the default since July 2, 1991: a state/local employee not in a qualifying public retirement system is covered by Social Security automatically, Section 218 or not.
• Qualifying (public) retirement system — a public pension meeting Social Security's minimum standards (a defined-benefit plan comparable to Social Security, or a defined-contribution plan meeting a safe-harbor contribution level, commonly 7.5%) — the pension that can stand in for Social Security on a non-covered job.
• Medicare-Qualified Government Employment — non-covered public work that still pays the Medicare (HI) portion, for employees hired after March 31, 1986; why a non-covered pay stub often shows Medicare but no Social Security.
• Form SSA-1945 — “Statement Concerning Your Employment in a Job Not Covered by Social Security,” the disclosure a non-covered public hire signs (hires on/after January 1, 2005); still required after the 2025 repeal.
• WEP / GPO (repealed) — the former penalties that reduced a non-covered worker's own (WEP) and spousal/survivor (GPO) Social Security; repealed by the Social Security Fairness Act in 2025 (worked in full at Lesson 97).