OASDI Meaning: What Is the OASDI Tax on Your Pay Stub?

What Does OASDI Mean?

OASDI is the acronym for Old-Age, Survivors, and Disability Insurance, the federal insurance program almost everyone knows by its friendlier name: Social Security. The program was created by the Social Security Act of 1935 and is run by the Social Security Administration (SSA). When payroll software needs a precise label for the Social Security deduction on your wages, it prints OASDI — which is why millions of workers meet the acronym on a pay stub years before they ever meet it in a textbook.

The tax itself is imposed under FICA — the Federal Insurance Contributions Act. FICA bundles two payroll taxes: the 6.2% OASDI (Social Security) tax and the 1.45% Medicare tax. They are withheld together, reported together, and fund two different programs — a distinction that matters every January, because only the OASDI half has an annual wage cap.

The Three Parts: Old-Age, Survivors, Disability

The name is a table of contents. Your OASDI tax funds three kinds of benefits:

Part	Who It Pays	What Triggers It
Old-Age	Retired workers (and often their spouses)	Reaching retirement age with enough work credits — the benefit most people picture
Survivors	Widows/widowers, children, and dependent parents of a deceased worker	The worker’s death — a form of life insurance built into every paycheck
Disability Insurance	Workers who develop a severe, long-lasting disability (and their families)	A medical condition that prevents substantial work and is expected to last at least a year or result in death

Most workers only ever think about the first row, but actuaries will tell you the other two are quietly enormous: for a young worker with a family, the survivors and disability protection earned through OASDI contributions can be worth as much as a substantial private insurance policy — one you have been funding since your first job.

OASDI on Your Pay Stub: Labels and Codes

Payroll systems label the same deduction many ways. The codes that confuse people most, decoded:

Label	Meaning
OASDI	The Social Security tax itself
Fed OASDI/EE	Federal OASDI, Employee share — the 6.2% taken out of your pay
OASDI/ER	The Employer share — a matching 6.2% your employer pays on top of your wages; you generally will not see it on your stub
FICA-SS / FICA-OASDI	The same deduction, labeled by its parent law (FICA) and program (Social Security)
SS Tax / Soc Sec	Plain-language labels for the identical line

A stub example: on a $1,000 paycheck, the “Fed OASDI/EE” line reads $62.00. Your employer sends another $62.00 of its own money with it — $124.00 total flows to the Social Security trust funds from that one check, but only your $62 reduced your take-home pay. This deduction sits alongside the separate Medicare line (1.45%, or $14.50 on that check) and federal income tax withholding, which is calculated completely differently. For the umbrella picture, see our guide to FICA meaning.

The OASDI Rate and the 2026 Wage Limit

Fact (2026)	Figure
Employee rate	6.2% of gross wages
Employer rate	Another 6.2% (12.4% combined)
Self-employment rate	12.4% (both halves, via SECA)
Wage base (taxable maximum)	$184,500 — up from $176,100 in 2025
Maximum employee OASDI tax	$11,439 for 2026

Worked examples: a salary of $50,000 produces $3,100 of OASDI tax for the year (about $119.23 per biweekly check). A salary of $200,000 produces tax only on the first $184,500 — exactly the $11,439 maximum — because earnings above the wage base are simply not OASDI-taxable. The wage base rises most years, indexed to national average wages, which is why the limit you remember from a previous job is probably out of date.

Why OASDI Stops Mid-Year for High Earners

High earners get a famous late-year surprise: the OASDI line vanishes from their pay stubs and their take-home pay jumps. Nothing is broken. Payroll tracks your year-to-date wages; the moment they cross the wage base ($184,500 in 2026), the 6.2% withholding shuts off automatically — no forms, no request — and stays off until January 1, when the counter resets and withholding resumes from the first dollar. A $250,000 salary paid biweekly typically crosses the line around mid-October. Note what does not stop: the Medicare tax continues on every dollar, and above $200,000 of wages an extra 0.9% Additional Medicare Tax begins. So the FICA deduction shrinks late in the year, but it never reaches zero.

One multi-job wrinkle: the wage cap applies per employer, not per person. Two employers can each withhold up to the cap, pushing your total above $11,439 — the excess is then credited back on your tax return. It is one of the few payroll overpayments the system refunds automatically.

OASDI vs. Medicare vs. FICA

	OASDI (Social Security)	Medicare (HI)
Employee rate	6.2%	1.45%
Wage cap	Yes — $184,500 (2026)	None
Extra tax at high wages	No	+0.9% Additional Medicare Tax above $200,000 (single threshold)
Funds	Retirement, survivors, disability benefits	Hospital insurance for 65+ and certain disabled people
Together	Combined, they are the FICA payroll tax: 7.65% employee + 7.65% employer = 15.3%

A Short History of OASDI

The acronym grew in stages, and each letter-group marks an expansion of who America decided to insure. The original Social Security Act of 1935, signed by President Franklin D. Roosevelt in the depths of the Great Depression, created only old-age insurance — retirement benefits for workers 65 and over, with the first payroll taxes collected in 1937 and the first monthly checks paid in 1940. 1939 amendments added benefits for a worker’s dependents and, crucially, for the families of workers who died — the survivors half of the name. Disability insurance arrived last, in 1956, initially for workers aged 50–64, and was extended to all ages in 1960. Only then did the program carry the full name it has today: Old-Age, Survivors, and Disability Insurance. (Medicare, created in 1965, is a separate program with its own tax — which is why it sits on a different line of your stub.) Nearly a century on, the same three-part structure from those Depression-era decisions is still printed, in miniature, on every paycheck in the country.

Where Your OASDI Money Goes

OASDI taxes flow into two federal trust funds — the Old-Age and Survivors Insurance (OASI) fund and the Disability Insurance (DI) fund. The system is fundamentally pay-as-you-go: the money withheld from your check this month is not deposited into a personal account with your name on it; it pays this month’s beneficiaries — today’s retirees, widows, and disabled workers — exactly as future workers’ taxes will one day fund your benefits. What you personally accumulate is credits (sometimes called quarters of coverage): most workers need 40 credits — roughly ten years of work — to qualify for retirement benefits, with younger workers needing fewer for disability and survivors coverage. Your benefit amount is then computed from your highest 35 years of taxed earnings, which is the long game hidden inside that small stub line.

Who Pays OASDI — and Who Is Exempt

• Employees: 6.2% withheld automatically — there is no opt-out and no form to defer it.
• Employers: a matching 6.2% paid on top of wages, deposited with the employee share.
• Self-employed: both halves — 12.4% — under SECA (the Self-Employed Contributions Act), paid with the annual tax return via Schedule SE; half is deductible as a business expense.
• Narrow exemptions exist: certain religious groups with certified objections, some student employees working at their own school, certain nonresident aliens on specific visas, and a few other defined categories. Most workers, most of the time, simply pay it.

One practical warning: if you are classified as a 1099 contractor, no OASDI line appears on anything — not because you are exempt, but because the obligation moved to you as self-employment tax. Confusing the two is how new freelancers meet an unexpected four-figure tax bill.

Frequently Asked Questions

What does OASDI stand for?
Old-Age, Survivors, and Disability Insurance — the official name of the Social Security program whose benefits cover retirees, survivors of deceased workers, and people with qualifying disabilities.

Is OASDI the same as Social Security tax?
Yes. OASDI is the formal program name; “Social Security tax” is the common name; “FICA-SS” is the payroll-label version. All three describe the same 6.2% deduction.

What is the OASDI tax rate in 2026?
6.2% for employees, matched by another 6.2% from employers, on wages up to $184,500. Self-employed workers pay the combined 12.4%.

What is the maximum OASDI tax in 2026?
$11,439 per employee (6.2% × $184,500). Once your year-to-date wages pass $184,500, OASDI withholding stops until January.

What does Fed OASDI/EE mean on my pay stub?
Federal OASDI, Employee share — your 6.2% Social Security contribution. The “/ER” employer share exists too, but your employer pays it separately, so it usually does not appear on your stub.

Is OASDI a federal income tax?
No. It is a payroll tax under FICA, calculated as a flat percentage of wages with a cap — completely separate from the progressive federal income tax, which has different rates, deductions, and refunds.

Can I opt out of OASDI?
For nearly everyone, no. Exemptions are narrow (certain religious groups, some student employees, specific visa categories). Employees cannot decline the withholding.

Do I get my OASDI money back?
Not as a refund — it is insurance, not savings. You “get it back” as monthly retirement, survivors, or disability benefits if and when you qualify, funded by the system as a whole.

Why did OASDI disappear from my paycheck?
You crossed the annual wage base ($184,500 in 2026). Withholding stops automatically for the rest of the year and restarts in January. Medicare tax, by contrast, never stops.

Does OASDI apply to bonus and overtime pay?
Yes — bonuses, overtime, commissions, and most other wages count toward OASDI exactly like regular salary, including toward the wage-base cap.

Source: For more on OASDI withholding, rates, and limits, see LegalClarity’s OASDI withholding guide.