OASDI is simply the official name for Social Security tax — a mandatory 6.2% deduction on your wages, matched by your employer, on earnings up to…
By ExpertPaystubs Editorial Team. Published 2026-08-26
OASDI stands for Old-Age, Survivors, and Disability Insurance — it is the official name for Social Security tax. Every W-2 employee pays 6.2% of gross wages to OASDI, and your employer pays a matching 6.2% on top. In 2026, the tax applies to the first $184,500 you earn; wages above that are OASDI-free for the rest of the year. It is not a mistake, not optional, and not a company-specific fee — it is a federal payroll tax collected under FICA, and it funds the monthly checks paid to retirees, disabled workers, and the families of workers who have died.
If you searched for this after inspecting your first pay stub, you are in good company: "what is OASDI" and "what does OASDI stand for" are two of the most-asked paycheck questions in the country.
What Does OASDI Actually Pay For?
The name spells out the three benefit programs your deduction funds:
- Old-Age — monthly retirement benefits, claimable as early as 62 (with a reduction) or at full retirement age (67 for anyone born in 1960 or later).
- Survivors — benefits paid to the spouse and dependent children of a worker who dies.
- Disability — income for workers who become unable to work due to a qualifying disability, via the SSDI program.
OASDI is pay-as-you-go: today's workers fund today's beneficiaries, and your earnings record (built from the wages your employer reports) determines the benefit you will eventually receive. That is one practical reason to check your stubs — wages that never get reported never earn you credit. You can verify your recorded earnings any time with a free account at ssa.gov.
How Much OASDI Tax Do I Pay in 2026?
| Who pays | Rate | 2026 wage limit | Maximum annual tax |
|---|---|---|---|
| Employee | 6.2% | First $184,500 of wages | $11,439 |
| Employer (match) | 6.2% | First $184,500 of wages | $11,439 |
| Self-employed (SECA) | 12.4% | First $184,500 of net earnings | $22,878 |
A few things worth noticing in that table:
- Your employer pays as much as you do. The 6.2% on your stub is only half the total OASDI contribution made on your behalf.
- The wage base moves every year. The $184,500 cap for 2026 is indexed to national wage growth, so it rises most years.
- Self-employed workers pay both halves — 12.4% — through the Self-Employment Contributions Act (SECA), calculated on 92.35% of net self-employment earnings. The consolation: half of self-employment tax is deductible on your income tax return.
Quick example: on a $2,000 biweekly gross, OASDI takes $124 ($2,000 × 6.2%). On a $60,000 salary, that is $3,720 for the year.
OASDI vs. Medicare: What's the Difference?
OASDI is one half of FICA; Medicare tax is the other. They are calculated separately and behave differently:
| Feature | OASDI (Social Security) | Medicare |
|---|---|---|
| Employee rate | 6.2% | 1.45% |
| Employer match | 6.2% | 1.45% |
| 2026 wage cap | $184,500 | None — all wages taxed |
| High-earner surtax | None | +0.9% on wages over $200,000 |
| Funds | Retirement, survivor, disability benefits | Hospital insurance (Medicare Part A) |
Together they make up the familiar 7.65% FICA employee share. Note the asymmetry: OASDI stops at the wage base, while Medicare never stops — and actually increases by 0.9% (employee-only, no employer match) once your wages pass $200,000 in a calendar year. Our Medicare tax guide covers that surtax in detail.
Why Did OASDI Disappear From My Paycheck?
If you earn a high salary, your OASDI deduction can vanish partway through the year — and that is by design. Once your year-to-date wages with an employer reach $184,500 in 2026, the 6.2% withholding stops, and your take-home pay jumps for the remaining pay periods. In January it starts again from zero.
Two situations create real problems worth knowing about:
- Two jobs in one year. Each employer withholds OASDI on your wages with them, up to the full wage base — neither knows what the other paid you. If your combined wages exceed $184,500, you will overpay OASDI, and the excess comes back as a credit on your federal tax return (your employers' matching shares, however, are not refunded).
- A stub with no OASDI line at all from the first paycheck onward usually means you have been classified as an independent contractor — meaning you owe the full 12.4% yourself via SECA — or that you fall into one of the rare exempt groups below.
Can I Opt Out of OASDI?
For almost everyone, no. OASDI is mandatory for W-2 employees and self-employed workers alike. The narrow exceptions include:
- Some state and local government employees covered by a qualifying public retirement system instead of Social Security.
- Members of certain religious groups that formally object to public insurance, with an approved IRS exemption (Form 4029).
- Students working for their own school in on-campus jobs, in limited circumstances.
- Nonresident aliens on certain visas (F-1, J-1) performing services allowed by their visa status.
Unless you fit one of these categories, OASDI comes out of every paycheck — no W-4 election, filing status, or allowance can change it. That is a key difference from federal income tax withholding, which you can adjust.
How OASDI Appears on Your Pay Stub
Payroll systems label the same 6.2% tax many different ways, which is a major source of confusion. All of the following codes refer to the same deduction:
| Stub code | Meaning |
|---|---|
| OASDI / EE OASDI | Old-Age, Survivors, and Disability Insurance (employee share) |
| SS / SOC SEC / SOCSEC | Social Security tax |
| FICA-SS / FICA OASDI | The Social Security half of FICA |
| SSWT | Social Security Withholding Tax |
| Fed OASDI/EE | Federal OASDI, employee portion |
To verify the math on any stub: multiply the period's gross (before pre-tax deductions such as a 401(k) — those reduce income tax, not FICA, in most cases) by 0.062. If the number doesn't match, and your YTD wages are still under $184,500, ask payroll about it. Our pay stub codes guide decodes the rest of the abbreviations, and how to read a pay stub walks the full document line by line.
If you generate stubs for your own business or household employees, ExpertPaystubs applies the 6.2% rate and the $184,500 wage base automatically, so the OASDI line and its YTD totals reconcile on every stub.
What Does “Fed OASDI/EE” Mean on My Paycheck?
Fed OASDI/EE is the federal Social Security tax, employee share — the same 6.2% deduction, spelled out in full. Decode it piece by piece:
- Fed — a federal tax, identical in every state.
- OASDI — Old-Age, Survivors, and Disability Insurance, the formal name for Social Security.
- /EE — the employee portion. Payroll systems abbreviate employee as "EE" and employer as "ER," so a "Fed OASDI/ER" line (visible on some employer reports) is the company's matching 6.2%, which never comes out of your pay.
This label is the house style of certain payroll platforms — ADP statements use it heavily — which is why two people with identical taxes can see "Fed OASDI/EE" on one stub and simply "Social Security" on another. The math check is the same either way: the Fed OASDI/EE amount should be exactly 6.2% of your FICA-taxable wages for the period, and it stops for the year once your wages reach $184,500 in 2026. The related "Fed MED/EE" line is the Medicare twin — 1.45% with no cap.
Frequently Asked Questions
What is the OASDI limit for 2026?
The 2026 OASDI wage base is $184,500: the 6.2% tax applies to your first $184,500 of wages, making the maximum employee OASDI tax $11,439 for the year ($22,878 for the self-employed, who pay both halves). Wages above the base are OASDI-free until January, when the count restarts at zero under the next year's (typically higher) limit.
Is OASDI the same as Social Security tax?
Yes — identical. OASDI is the program's formal name; "Social Security tax" is the everyday one. Whether your stub says OASDI, SS, SOCSEC, or FICA-SS, it is the same 6.2% deduction. See the full Social Security tax entry in our glossary.
Do I get OASDI back on my tax return?
Not normally — it is a true tax, not a withholding estimate like federal income tax. The exception is overpayment: if two or more employers together withheld OASDI on more than $184,500 of 2026 wages, the excess is refunded as a credit when you file.
Why is my OASDI amount different from my coworker's?
OASDI is a flat percentage of gross wages, so the only variables are pay and the wage cap. A coworker with different gross pay, or one who has already crossed $184,500 for the year, will show a different amount — filing status and W-4 choices play no role.
Does OASDI apply to bonuses and overtime?
Yes. Bonuses, commissions, overtime, and most other cash compensation are all OASDI wages, up to the annual cap. A few pre-tax benefits — such as Section 125 health premiums — are exempt from FICA, which is why "Social Security wages" on your W-2 (Box 3) can differ slightly from gross pay.
Will Social Security still exist when I retire?
Under current projections the trust funds face a shortfall in the 2030s, at which point incoming payroll taxes would still cover roughly three-quarters of scheduled benefits unless Congress acts. Nothing about that changes today's withholding: 6.2% up to the wage base, every paycheck.
The bottom line: OASDI is Social Security tax under its legal name — 6.2% of your wages, matched by your employer, capped at $184,500 of earnings in 2026. It is mandatory, it funds retirement, survivor, and disability benefits, and its sudden disappearance late in the year just means a high earner hit the wage base. If the OASDI line on a stub is not exactly 6.2% of FICA-taxable gross, the stub — not the tax — is what needs fixing.