What Is OASDI?

OASDI (Old-Age, Survivors, and Disability Insurance) is the federal Social Security program administered by the Social Security Administration (SSA). It provides three types of benefits:

• Old-age (retirement) benefits — monthly income for retired workers
• Survivors benefits — income for the spouses and children of workers who have died
• Disability benefits — income for workers who become unable to work due to a qualifying disability

The tax that funds this program is deducted directly from your paycheck, and it’s this deduction — not the broader program — that appears on your pay stub as “OASDI.”

OASDI vs. Medicare vs. FICA

These three terms are related but not interchangeable, and mixing them up is one of the most common sources of pay stub confusion:

Together, OASDI and Medicare make up the full 7.65% FICA withholding you see on your paycheck. When people say “FICA tax,” they almost always mean the combination of these two; OASDI is specifically the larger, Social-Security-funding piece.

The 2026 Rate and Wage Cap

The wage base rises most years to keep pace with national average wage growth — it was $176,100 in 2025 and $168,600 in 2024. Once your year-to-date wages from a single employer cross $184,500 in 2026, that employer stops withholding OASDI for the remainder of the calendar year.

Where OASDI Appears on a Pay Stub

OASDI typically shows up as its own line item, separate from Medicare, though the exact label depends on your employer’s payroll system. Common variations include:

• OASDI
• Fed OASDI/EE (the “EE” indicates the employee-paid portion)
• Social Security or SS
• FICA-SS (distinguishing it from the Medicare portion of FICA)

What OASDI Actually Funds

Withheld OASDI contributions flow into two federal trust funds managed by the Social Security Administration:

It’s a pay-as-you-go system: the OASDI contributions withheld from your paycheck today largely fund benefits being paid to current retirees and beneficiaries, not a personal account set aside specifically for you. When you eventually claim benefits, they’ll be funded by workers contributing at that time.

OASDI Tax by Income Level

Because OASDI is a flat 6.2% rate up to the wage cap, it’s straightforward to estimate at any income level — until you cross the $184,500 cap, at which point the tax stops growing even though income keeps rising. Here’s what that looks like in practice:

This is different from Medicare tax, which has no cap at all — Medicare’s 1.45% rate (plus an extra 0.9% above certain thresholds) applies to every dollar earned, no matter how high income goes. That structural difference is a common point of confusion, since people sometimes assume both halves of FICA work the same way.

How OASDI Becomes Your Own Benefit

Paying OASDI tax isn’t just an obligation — it’s what makes you eligible for your own future Social Security benefits, tracked through a system of work credits.

• In 2026, you earn one work credit for every $1,890 in covered wages, up to a maximum of 4 credits per year
• Most workers need 40 credits (roughly 10 years of work) to be considered “fully insured” and eligible for retirement benefits
• Disability and survivor benefits may require fewer credits, depending on your age when disability or death occurs
• Your eventual monthly retirement benefit is calculated using an average of your highest 35 years of indexed earnings — so consistent OASDI-covered earnings over time directly shape your future benefit amount

Full Retirement Age and When You Choose to Claim

Earning enough work credits makes you eligible for OASDI retirement benefits, but the age at which you actually start claiming them significantly affects your monthly amount. The SSA calculates a baseline monthly benefit at your Full Retirement Age (FRA), and adjusts it up or down depending on when you actually file.

• You can start claiming as early as age 62, but your monthly benefit is permanently reduced — by as much as 30% compared to waiting until full retirement age
• Delaying past your full retirement age, up to age 70, increases your monthly benefit through delayed retirement credits — roughly an additional 8% per year of delay
• There’s no additional benefit to delaying past age 70, since delayed retirement credits stop accruing at that point

Checking Your Earnings Record

Since your future benefit is calculated from your lifetime OASDI-covered earnings, it’s worth periodically confirming the SSA has an accurate record of what you’ve actually earned and paid in.

1. Create or log into a my Social Security account at the SSA’s official website
2. Review your yearly earnings history, which should reflect the wages reported on your W-2s (specifically your Box 3 Social Security wages) each year
3. Compare a few recent years against your own pay stub YTD totals or W-2s to spot any obvious gaps or mismatches
4. If you find a discrepancy — a missing year, or an amount that looks wrong — contact the SSA directly with supporting documents like old pay stubs, W-2s, or tax returns to get it corrected
5. While logged in, you can also view your personalized estimated future benefit at different claiming ages

Self-Employed Workers Pay Both Halves

If you’re self-employed, there’s no separate employer to split the 12.4% with — you pay the full amount yourself through SECA (Self-Employment Contributions Act) tax rather than FICA.

Who Is Exempt From OASDI?

Exemptions are narrow, and most workers have no legal way to opt out. The recognized exceptions include:

• Certain members of recognized religious groups with conscientious objections to Social Security benefits, who file IRS Form 4029
• Some nonresident aliens on F-1, J-1, M-1, or Q visas performing authorized practical training (such as OPT) — see our guide to your first US paycheck on OPT for details
• Self-employed individuals with net earnings under $400 for the year, who fall below the threshold requiring SECA tax at all
• Certain state and local government employees covered by an alternate public retirement system in place of Social Security, under what’s known as a Section 218 agreement

An Important Update for Public-Sector Workers

If you’re a state or local government employee not covered by Social Security — meaning OASDI isn’t withheld from your public-sector paycheck — a major related rule changed recently. The Social Security Fairness Act, signed into law in January 2025, repealed two provisions called the Windfall Elimination Provision (WEP) and Government Pension Offset (GPO).

These provisions previously reduced Social Security benefits for people who received a government pension from non-OASDI-covered work but also qualified for Social Security benefits through other employment or a spouse. With WEP and GPO repealed, roughly 3.2 million affected teachers, police officers, firefighters, and other public employees are now eligible for higher monthly benefits, with retroactive payments back to January 2024 for those affected. If this applies to you and you never filed for a spousal or survivor benefit because GPO previously made it seem pointless, it’s worth checking with the SSA directly, since that benefit may now be available.

Overpaying OASDI: When It Happens and How to Get It Back

Unlike federal income tax, OASDI is not generally refundable — it’s an insurance contribution, not a pre-payment toward a return. But in one specific, common scenario, you actually can get money back.

The Multiple-Employer Scenario

If you work for two or more employers in the same calendar year, each employer withholds OASDI independently, without knowledge of what the others are withholding. If your combined wages across all employers exceed $184,500 in 2026, more than the maximum $11,439 may have been withheld in total.

1. Add up the OASDI (Social Security tax withheld) shown in Box 4 of each W-2 you received for the year
2. If the combined total exceeds the annual maximum ($11,439 for 2026), you overpaid
3. Claim the excess as a refundable credit on Schedule 3 of Form 1040 when filing your federal tax return
4. The overpayment is applied toward your total tax liability or included in your refund, the same as any other tax credit

Is Social Security Running Out? What the Trust Fund Numbers Actually Say

It’s a fair question to ask, given how much of your paycheck goes toward OASDI every period: will the program still be there when it’s your turn to collect? The honest answer, based on the Social Security Trustees’ 2026 annual report, is more nuanced than headlines often suggest.

The two trust funds (OASI for retirement/survivors and DI for disability) are technically separate, though they’re often discussed together as “OASDI.” The disability fund alone is projected to remain solvent through the full 75-year projection window; it’s the retirement fund specifically driving the more urgent 2032 date.

None of this changes what’s withheld from your paycheck today — the 6.2% rate and $184,500 cap apply regardless of the program’s long-term financing outlook. Congress has addressed similar funding gaps before through legislative changes to the rate, the cap, the benefit formula, or some combination, and has years of lead time before the projected depletion dates arrive. Whether and how lawmakers act remains a live political question, not something reflected in your current withholding.

Worked Example

Scenario: An employee earning $95,000 annually, paid semimonthly (24 paychecks/year), so each gross paycheck is $3,958.33.

Since this employee’s annual wages ($95,000) stay well under the $184,500 wage base, OASDI is withheld consistently at 6.2% on every paycheck all year, totaling $5,890 in OASDI tax for the year — no mid-year cutoff applies at this income level.

Common Misconceptions

FICA OASDI on a Paycheck — FAQs