RSDI Social Security stands for Retirement, Survivors, and Disability Insurance, the official name of the federal program that pays monthly benefits to retired workers, workers who become disabled, and the families of workers who die. It’s funded by the Social Security taxes withheld from your paycheck, and eligibility depends on how long you’ve worked and paid in. Most people qualify after about 10 years of covered work.1
The Social Security Administration also refers to the program as Old-Age, Survivors, and Disability Insurance, or OASDI. Same program, same benefits, different acronym.
The Three Kinds of Benefits RSDI Pays
RSDI bundles three separate protections that all draw from the same pool of payroll tax contributions you and your employer make throughout your working life.
Retirement benefits go to workers who have earned enough credits and reached at least age 62. This is what most people think of as Social Security.
Survivor benefits go to spouses, children, and in some cases dependent parents of workers who have died. A one-time lump-sum death payment of $255 is also available to a surviving spouse or eligible children, provided you apply within two years of the death.
Disability benefits (SSDI) go to workers who can no longer hold a job because of a serious medical condition. Each of the three has its own eligibility rules, but the credits you earn from working count toward all of them.
How You Qualify: The Credit System
Everything in RSDI runs on work credits. You earn credits by working in a job that pays Social Security taxes. In 2026, you get one credit for every $1,890 in earnings, up to four credits per year. So earning at least $7,560 in a year gives you the full four.
Retirement
You need 40 credits, which works out to roughly 10 years of work, to qualify for retirement benefits. Once you have them, you’re “fully insured” for life.
The earliest you can claim is age 62, but claiming early cuts your monthly check permanently. If your full retirement age is 67 (everyone born in 1960 or later), claiming at 62 reduces your benefit by 30%. Waiting past 67 goes the other direction: your benefit grows by 8% for each year you delay, up to age 70. Waiting beyond 70 does nothing.
Family Members of a Living Worker
A spouse can receive up to 50% of your full benefit at their own full retirement age, or a reduced amount as early as 62. A spouse of any age also qualifies if they’re caring for your child under 16 or a child with a qualifying disability.
A divorced spouse can qualify on your record if the marriage lasted at least 10 years, they’re at least 62, currently unmarried, and not entitled to a higher benefit on their own record. What they collect does not reduce anything you or your current spouse receives.
Children qualify if they’re unmarried and either under 18, under 19 and still in high school full-time, or any age if they developed a disability before age 22.
Survivors
A widow or widower can receive reduced survivor benefits at age 60, or age 50 with a qualifying disability, and full survivor benefits at their own full retirement age. You generally must have been married to the deceased for at least nine months before the death and must not have remarried before age 60 (or 50 if disabled).
A surviving spouse of any age qualifies while caring for the deceased worker’s child under 16 or a child with a disability. The children themselves qualify under the same age rules that apply to family benefits for living workers.
Disability
Disability has the strictest rules of the three. The SSA defines disability as the inability to perform any substantial work because of a medical condition expected to last at least 12 months or result in death. Partial disability doesn’t qualify.
The credit requirement depends on your age when the disability begins. Younger workers need fewer credits, with a minimum of six. Workers disabled at 31 or older generally need at least 20 credits earned in the 10 years right before the disability started.
In 2026, earning more than $1,690 per month (or $2,830 if you’re blind) is considered “substantial gainful activity” and will generally disqualify you, though a trial work period lets you test working without immediately losing benefits. Even after approval, there’s a five-month waiting period before payments begin. The one exception is ALS, which has no waiting period.
Initial denial rates run high. Historically, only about 20% to 37% of first-time disability applications result in an award. Many claims that fail initially succeed on appeal at the hearing level.
How Much RSDI Pays
Your benefit is based on your highest-earning 35 years. The SSA adjusts those earnings for inflation, averages them into your Average Indexed Monthly Earnings (AIME), and then runs the AIME through a formula to produce your Primary Insurance Amount (PIA) — the monthly amount you’d receive at full retirement age.
The 2026 formula pays:
- 90% of the first $1,286 of your AIME
- 32% of the AIME between $1,286 and $7,749
- 15% of the AIME above $7,749
The structure is progressive, so lower earners replace a larger share of their pre-retirement income than higher earners do. If you worked fewer than 35 years, zeros fill the missing slots and pull your average down. That’s where people with big gaps in their work history take the largest hit.
For 2026, the maximum monthly benefit for a worker retiring at full retirement age is $4,152. Claiming at 62 drops that to roughly $2,906. Delaying to 70 pushes it above $5,100.
Once you’re receiving benefits, the SSA adjusts them each year through a cost-of-living adjustment tied to inflation. Benefits go up when prices rise and never go down when prices fall. The 2026 COLA was 2.8%.
Working, Taxes, and Medicare
If you claim retirement benefits before full retirement age and keep working, an earnings test may temporarily withhold part of your check. In 2026, the SSA withholds $1 for every $2 you earn above $24,480 if you’ll be under full retirement age all year. In the year you reach full retirement age, it’s $1 for every $3 above $65,160, counting only earnings before the month you hit that age. At full retirement age and beyond, there’s no earnings test. Money withheld isn’t lost; the SSA recalculates your benefit at full retirement age to credit you for the withheld months.
Your benefits may also be taxable. Up to 85% of your Social Security benefits can be subject to federal income tax depending on your combined income (adjusted gross income, plus nontax-exempt interest, plus half your Social Security benefits). Single filers with combined income above $34,000 and joint filers above $44,000 can see up to 85% taxed. Those thresholds were set in 1983 and 1993 and have never been indexed to inflation, so about 40% of people receiving Social Security now pay federal tax on some of their benefits.
RSDI also ties into Medicare. If you’re already receiving Social Security retirement benefits at least four months before turning 65, the SSA automatically enrolls you in Medicare Part A and Part B. Part A is premium-free with 40 credits; Part B carries a monthly premium and can be declined. SSDI recipients get Medicare after a 24-month qualifying period, which in practice means about 29 months from the onset of disability once the five-month waiting period is added. ALS is again the exception, with no 24-month wait.
How to Apply
You can apply online at ssa.gov, by phone, or in person at a local Social Security office. The SSA recommends applying no more than four months before you want benefits to start.
Have these ready before you apply:
- Your Social Security card or a record of your number, plus your birth certificate (originals or certified copies from the issuing agency; photocopies aren’t accepted)
- Proof of U.S. citizenship or lawful immigration status if you weren’t born in the U.S.
- W-2 forms or self-employment tax returns from the most recent year
- Discharge papers (DD-214) if you served in the military
- Marriage certificates and divorce decrees if you’re applying for spousal or survivor benefits
- Birth dates, Social Security numbers, and birth certificates for any children being included
Retirement applications are usually straightforward. Disability applications take longer because the SSA has to evaluate your medical evidence, often contacting your doctors and sometimes scheduling a consultative exam.
If you’re denied, you have 60 days from receiving the notice to appeal, and the SSA assumes you received it five days after mailing. Missing that deadline generally means starting the whole application over.
RSDI Is Not the Same as SSI
People often mix up RSDI with Supplemental Security Income because the SSA runs both. They work very differently.
RSDI is an earned benefit. You qualify by working and paying Social Security taxes, and your benefit amount depends on your career earnings. Other income and assets don’t matter.
SSI is a need-based program funded by general tax revenue, not payroll taxes. It pays monthly benefits to people who are 65 or older, blind, or disabled and have very limited income and resources. In 2026, the maximum federal SSI payment is $994 per month for an individual and $1,491 for a couple, with some states adding a small supplement.
Some people qualify for both. If your RSDI benefit is very low and your resources are limited, SSI can bring your total income up to the SSI floor.