The core difference: work history versus income level

Social Security is a program you pay into through payroll taxes during your working years. When you turn 62, become disabled, or die, you or your family members receive monthly payments based on how much you earned and how long you worked. The amount you get depends on your earnings record, not on how much money you have right now.

Supplemental Security Income (SSI) is a needs-based program for people with very low income and few assets, regardless of work history. You do not need to have worked to receive SSI. Instead, the government looks at your current financial situation — how much money you have in the bank, what you own, and what you earn each month — and pays you if you fall below the income and asset limits.

The confusion happens because both programs are run by the Social Security Administration, both serve people who are disabled or elderly, and both can pay you monthly. But they are funded differently, have different rules, and serve different populations.

Key Takeaways

  • Social Security is based on your work history and payroll tax contributions; SSI is based on your current income and assets.
  • You can receive both programs at the same time, though your SSI payment will be reduced by the amount you get from Social Security.
  • Social Security has no asset limit; SSI limits you to $2,000 in countable resources (this amount varies slightly by state and changes annually).
  • Social Security Disability Insurance (SSDI) requires a work history; SSI has no work requirement and serves people of any age with disabilities or who are 65 and older.
  • If you receive SSI, you may also receive Medicaid; Social Security recipients typically may have access to for Medicare at 65 or after receiving disability benefits for two years.

How Social Security works: based on your earnings record

Social Security has three main payment types: retirement benefits (age 62 or older), disability benefits (called SSDI), and survivor benefits (paid to your family if you die). All three are based on your Primary Insurance Amount, which the Social Security Administration calculates from your highest 35 years of earnings.

To receive Social Security retirement benefits, you need at least 40 work credits, which you earn by paying Social Security taxes. In 2024, you earn one credit for each $1,705 in wages (the amount changes yearly). You can earn up to four credits per year, so 40 credits typically takes 10 years of work.

For SSDI, you also need work credits, but the number depends on your age when you become disabled. If you are under 24, you may need as few as six credits. The older you are, the more credits you typically need, up to 40.

Once you may have access to, your monthly payment is set by a formula tied to your earnings history. If you were a high earner, you get more. If you were a low earner, you get less. Your payment does not change based on whether you are rich or poor today — only on what you earned in the past.

How SSI works: based on your current financial situation

SSI pays a federal base amount to people who are disabled, blind, or 65 and older and who have very limited income and resources. In 2024, the federal base amount is $943 per month for an individual and $1,415 for a couple (these amounts increase each January). Some states add extra money on top of the federal amount.

To receive SSI, your countable resources must be below $2,000 for an individual or $3,000 for a couple. Countable resources include cash, bank accounts, stocks, and property you own — but not your home, your car (up to a certain value), household items, or life insurance. The Social Security Administration has a full list of what counts and what does not.

Your monthly income limit varies by state because some states supplement the federal payment. In most states, if you earn more than the federal base amount ($943 in 2024), your SSI payment shrinks by 50 cents for every dollar you earn above $65 per month. This means you can work and still receive SSI, but your payment will be reduced.

Unlike Social Security, SSI does not care whether you ever worked. A 25-year-old who has never held a job can receive SSI if they are disabled and have low income and resources. A 70-year-old with no work history can receive SSI if they meet the income and resource limits.

Can you receive both Social Security and SSI at the same time?

Yes. Many people receive both SSDI (Social Security disability) and SSI in the same month. This happens when someone qualifies for SSDI based on their work history but the SSDI payment is very small — perhaps because they worked only briefly or at low wages.

When you receive both, the Social Security Administration counts your SSDI payment as income toward your SSI limit. If your SSDI payment is $500 and the SSI federal base is $943, you would receive $443 in SSI (the difference). If your SSDI payment is $943 or more, you receive no SSI.

You cannot receive both regular Social Security retirement benefits and SSI at the same time in the same month. Once your retirement benefit reaches the SSI limit, SSI stops. However, you can receive retirement benefits and still be on SSI if your retirement payment is very small.

Asset and income limits: where the rules differ most

Social Security has no asset limit. You can have $1 million in the bank and still receive your full Social Security payment. Your income from work does affect your benefit if you claim before your full retirement age, but investment income, pensions, and other money do not.

SSI has strict limits. You can have no more than $2,000 in countable resources as an individual. This includes money in checking and savings accounts. If you inherit $5,000, you must spend it down to $2,000 or you lose SSI. Some states allow a small buffer — called a "resource exclusion" — but most follow the federal $2,000 limit.

Income rules also differ. Social Security has no income limit for retirement or survivor benefits (though earning wages before full retirement age reduces your benefit). SSI has a monthly income limit that varies by state but is typically around $943 for individuals in 2024.

Both programs count earned income (wages from work) and unearned income (pensions, interest, gifts). SSI excludes the first $65 of monthly earned income and half of earnings above that. Social Security counts all wages but only applies the earnings test if you are under full retirement age.

Healthcare coverage: Medicare versus Medicaid

Social Security recipients age 65 and older receive Medicare, the federal health insurance program. You are automatically enrolled in Medicare Part A (hospital insurance) and Part B (medical insurance) when you turn 65, even if you have not claimed your Social Security benefit yet. You pay premiums for Part B and Part D (prescription drug coverage).

SSDI recipients receive Medicare after they have been on disability for 24 months. This means if you are approved for SSDI in January, you become may be able to access for Medicare in January of the following year (after 24 months of benefits).

SSI recipients receive Medicaid, the joint federal-state health insurance program for low-income people. Medicaid covers doctor visits, hospital stays, and prescriptions with little or no cost to you. The exact coverage varies by state. In most states, if you receive SSI, you are automatically enrolled in Medicaid. In a few states, you must explore separately.

This is a major difference: Social Security leads to Medicare (which you pay for), while SSI leads to Medicaid (which is free for low-income recipients). If you are on both SSDI and SSI, you receive both Medicare and Medicaid.

How to determine which program you might receive

Ask yourself these questions in order:

  1. Have you worked and paid Social Security taxes for at least 10 years (40 credits)? If yes, you may receive Social Security retirement benefits at 62 or later, or SSDI if you become disabled.
  2. Are you disabled or blind right now, or are you 65 or older? If yes, you may be able to receive SSI if your income and resources are low enough.
  3. Is your Social Security payment (if you have one) very small — less than the SSI federal base amount? If yes, you might receive both SSDI and SSI.
  4. Do you have less than $2,000 in countable resources and low monthly income? If yes, SSI is possible even without a work history.

The Social Security Administration can tell you which programs you might receive based on your specific situation. You can create a my Social Security account online at ssa.gov to see your earnings record and get an estimate of your future benefits.

Frequently Asked Questions

Can I get Social Security if I never worked?

Not regular Social Security retirement or SSDI — both require a work history. However, you may receive SSI if you are disabled, blind, or 65 or older and have low income and resources. You can also receive Social Security survivor benefits if you are the spouse, child, or parent of someone who worked and paid Social Security taxes.

What happens to my SSI if I inherit money?

If you inherit more than $2,000 in countable resources, your SSI stops until you spend the inheritance down below $2,000. Some inheritances (like a house you live in) do not count toward the limit. Report any inheritance to the Social Security Administration right away — waiting to report it can result in overpayments you must repay.

Do I have to be a U.S. citizen to receive Social Security or SSI?

For Social Security, you must have a valid Social Security number and have worked and paid taxes. Citizenship is not required, but you must have work authorization. For SSI, you must be a U.S. citizen or a may have access to non-citizen (such as a lawful permanent resident or refugee). Rules vary, so check with the Social Security Administration if you are unsure of your status.

If I work, will I lose my SSI?

Not necessarily. SSI allows you to earn money and still receive a payment. The first $65 of your monthly earnings does not count. After that, your SSI payment is reduced by 50 cents for every dollar you earn. So if you earn $200 per month, only $135 counts as income ($200 minus $65), and your SSI payment drops by about $68.

What is the difference between SSDI and SSI?

SSDI (Social Security Disability Insurance) is based on your work history and the taxes you paid. SSI (Supplemental Security Income) is based on your current income and resources, not your work history. Both serve disabled people, but SSDI is an earned benefit and SSI is a needs-based benefit.