SSI and Social Security are not the same, though the names sound similar

SSI (Supplemental Security Income) and Social Security are two separate federal programs run by the same agency — the Social Security Administration — but they have different rules, different funding sources, and different reasons you might receive them. Social Security is an insurance program you pay into through payroll taxes during your working years. SSI is a needs-based program funded by general tax revenue, designed for people with low income and few assets, regardless of work history.

The confusion is understandable because both programs can pay you if you are disabled, and both are administered by SSA. But the path to getting money, how much you receive, and what happens if you earn other income are completely different. Understanding which one you might be dealing with matters because the rules that affect your payments are not the same.

Key Takeaways

  • Social Security is an earned benefit based on your work history and payroll tax contributions; SSI is a needs-based program for people with low income and limited assets.
  • You can receive Social Security without meeting any income or asset limits, but SSI payments stop or reduce if your income or resources exceed the program's thresholds.
  • Social Security Disability Insurance (SSDI) is the disability version of Social Security and requires a work history; SSI disability payments do not require you to have worked.
  • Both programs use the same disability definition, but SSI also counts your household's income and assets, while SSDI does not.
  • You can receive both SSDI and SSI at the same time if your SSDI payment is low enough, though the total amount is capped.

How Social Security and SSI differ in who can receive them

To receive Social Security, you must have worked and paid Social Security taxes for a certain number of quarters (three-month periods). The amount you receive is based on your earnings record — the higher your lifetime earnings, the higher your payment. You can receive Social Security at age 62 (with a reduced payment), at your full retirement age (which varies by birth year), or at age 70 (with a higher payment). You can also receive it if you are disabled or if you are the spouse, ex-spouse, or child of someone who is receiving or may have access to to Social Security.

SSI has no work requirement. You can receive it if you are disabled, blind, or age 65 or older, and if your income and resources fall below the program's limits. SSI does not care whether you ever worked or paid taxes. It is designed for people with very limited means. Your household's income — including income from a spouse or parent if you are under 18 — counts toward the limit. Your assets (savings, property, vehicles) also count, with some exceptions like your home and one car.

The income and asset limits for SSI change each year. As of 2024, the monthly limit for an individual is around $943 in countable income, though this varies by state because some states add their own money to the federal SSI payment. The resource limit is $2,000 for an individual and $3,000 for a couple. If you earn money from work, SSI has rules that let you keep some of it without losing benefits, but Social Security does not reduce your payment based on other income you earn.

The disability rules are the same, but SSI also checks your finances

Both Social Security and SSI use the same medical definition of disability: a condition that prevents you from doing substantial work and is expected to last at least 12 months or result in death. The Social Security Administration evaluates your condition the same way whether you are explore for SSDI (Social Security Disability Insurance, which is the disability version of Social Security) or SSI disability.

The difference is what happens after the medical decision. If you are approved for SSDI, you receive a payment based on your work history. There is no income or asset limit — you could have a million dollars in the bank and still receive your full SSDI payment. If you are approved for SSI, the payment is the same for everyone (the federal base amount, plus any state supplement), but you only receive it if your income and resources stay below the limits. If you earn money from work or receive other income, your SSI payment shrinks or stops.

Some people receive both SSDI and SSI. This happens when your SSDI payment is very low — perhaps because you did not work many years before becoming disabled. SSI tops up your SSDI payment to bring you to the federal benefit rate, as long as your other income and resources stay within the SSI limits.

How work and other income affect your payments

If you receive Social Security (either retirement or disability), you can earn as much as you want without losing your benefit. There is no earnings test. However, if you are under your full retirement age and receiving retirement benefits early, Social Security reduces your payment by $1 for every $2 you earn above a certain amount (the limit changes each year). Once you reach your full retirement age, there is no reduction no matter how much you earn.

If you receive SSI, earned income directly reduces your payment. SSI lets you keep the first $65 of monthly earnings plus half of anything above that, but the rest counts against your benefit. Unearned income — such as gifts, child support, or other benefits — counts dollar-for-dollar. This means if you receive $200 in monthly unearned income, your SSI payment drops by $200. The income rules are strict because SSI is a needs-based program.

If you are trying to work while on SSI, the program has a Plan to Achieve Self-Support (PASS) that lets you set aside income and resources for a work goal without losing benefits. A PASS is a written plan you create with a work counselor that shows how you will use the money to reach a specific job goal. While you are following the plan, the income and resources you set aside do not count toward the SSI limits.

Medicare, Medicaid, and other benefits differ between the programs

When you receive Social Security Disability Insurance (SSDI), you become covered by Medicare after you have been on SSDI for 24 months. Medicare is health insurance, not a needs-based program, so you keep it regardless of your income or resources. You pay premiums for Medicare Part B and Part D (prescription drug coverage) based on your income, but you are covered.

When you receive SSI, you are usually covered by Medicaid, which is a needs-based health program. Medicaid coverage continues as long as you meet the SSI income and resource limits. If your income rises above the SSI limit and you lose SSI, you may also lose Medicaid coverage, though some states have programs that let you keep Medicaid even if you earn too much for SSI. This is called Medicaid Buy-In or a 1619(b) continuation (the latter applies to SSDI recipients who earn too much to keep their benefit).

If you receive both SSDI and SSI, you have Medicare as your primary health coverage and Medicaid as a secondary payer. The Medicaid covers costs Medicare does not, such as copayments and deductibles.

What happens if you work or your situation changes

If you are on SSDI and you want to work, you can do a trial work period where you work for up to nine months without losing your benefit, regardless of how much you earn. After the trial work period ends, Social Security continues to pay you for up to three more years as long as your earnings stay below a certain amount (the substantial gainful activity level, which is around $1,550 per month in 2024, though this changes yearly). If your earnings go above that level for nine months, your SSDI ends, but you have a grace period where you can go back on SSDI if your earnings drop again.

If you are on SSI and you work, your payment shrinks when ready based on the income rules described above. There is no trial work period. However, SSI has the PASS program mentioned earlier, which is the main tool for people on SSI who want to work toward a job goal.

If your situation changes — you inherit money, move in with someone, get married, or your medical condition improves — you must report it to Social Security. For SSI, changes in income or resources can affect your payment right away. For SSDI, changes in your medical condition can lead to a continuing disability review, where Social Security checks whether you still meet the disability definition.

How to find out which program you are on

If you are already receiving a payment, your Social Security statement or award letter will tell you which program you are on. It will say "Social Security Retirement Benefits," "Social Security Disability Insurance," or "Supplemental Security Income." If the letter says SSI, you are on the needs-based program. If it says SSDI or retirement, you are on Social Security.

If you are not yet receiving benefits and you are trying to figure out which program you might be on, the answer depends on your situation. If you have a work history and are disabled, you would likely explore for SSDI first, because it does not have income or asset limits and the payment is usually higher. If you have little or no work history, or if your SSDI payment would be very low, you might be on SSI instead. You can explore for both at the same time by contacting your local Social Security office or explore online at ssa.gov.

Frequently Asked Questions

Can I receive both SSDI and SSI at the same time?

Yes. If your SSDI payment is low enough that you still fall below the SSI income limit, you can receive both. SSI will top up your SSDI payment to the federal benefit rate. However, your total payment from both programs combined cannot exceed the SSI federal benefit rate, which is around $943 per month for an individual in 2024.

If I inherit money, will I lose my SSI?

If you inherit money and you are on SSI, your payment will stop once your resources exceed $2,000 (for an individual). You must report the inheritance to Social Security. If you are on SSDI instead, the inheritance does not affect your payment at all. This is one of the biggest practical differences between the two programs.

What is the difference between SSDI and Social Security retirement?

SSDI is for people who are disabled, blind, or the dependent of someone who is disabled. Social Security retirement is for people age 62 or older who have a work history. Both are based on your earnings record, and both have no income or asset limits. The main difference is the age and medical requirement.

If I am on SSI and I get married, what happens to my payment?

Your SSI payment will likely change. SSI counts your spouse's income and resources toward your limit. If your spouse has income or resources, your SSI payment will reduce or stop. You must report the marriage to Social Security within 10 days. If you marry someone who is also on SSI, you both become a couple, and the resource limit rises to $3,000, but the income limit applies to both of you together.

Can I work while on SSI or SSDI?

Yes, but the rules are different. On SSDI, you have a nine-month trial work period where you can earn any amount without losing your benefit. On SSI, you can work, but your payment reduces based on your earnings when ready — you keep the first $65 plus half of anything above that. SSI also has a PASS program that lets you set aside income for a work goal without losing benefits.