SSI and SSDI are separate programs with different rules about who gets money and how much

SSI (Supplemental Security Income) and SSDI (Social Security Disability Insurance) are both federal programs that pay people with disabilities, but they work in completely different ways. SSI is a needs-based program — you get money if your income and assets are low enough. SSDI is an insurance program — you get money because you or a family member paid Social Security taxes while working. A person can receive one, both, or neither depending on their work history and financial situation.

The confusion is common because both are run by the Social Security Administration, both require medical proof of disability, and both use the same definition of disability. But the money comes from different sources, the amounts differ, and the rules about working and earning money are not the same. Understanding which program you might be dealing with matters because it changes what paperwork you need, how long the process takes, and what happens if your situation changes.

Key Takeaways

  • SSI is for people with low income and assets who have a disability; SSDI is for people who have worked and paid Social Security taxes and now cannot work due to disability.
  • SSI payments are smaller and include strict limits on how much money and property you can own; SSDI payments are based on your work history and have no asset limits.
  • Both programs require the same medical proof that you cannot work, but the Social Security Administration evaluates your case using the same disability standards for both.
  • You can receive both SSI and SSDI at the same time if you meet the requirements for each, though the total amount you receive may be adjusted.
  • Working while on either program is possible but has different rules and thresholds for how much you can earn before payments are reduced.

How SSI works: income and assets matter most

SSI is designed for people with disabilities who do not have enough income or savings to support themselves. To receive SSI, you must have a disability (as defined by Social Security), be age 65 or older, or be blind. Your income must be below a certain level, and your countable assets must not exceed a limit. The asset limit is currently $2,000 for an individual and $3,000 for a couple, though some things — like your home, one vehicle, and certain personal items — do not count toward that limit.

The monthly payment amount is set by the federal government and is the same in most states, though a few states add a small supplement. The payment is meant to cover basic living expenses like food, shelter, and utilities. If you have other income — from a job, a pension, or family support — your SSI payment is reduced. SSI also comes with Medicaid in most states, which covers medical care.

How SSDI works: your work history determines may be able to access

SSDI is an insurance benefit. You become insured for SSDI by working and paying Social Security taxes. When you become disabled, you can draw on that insurance just as your family could draw survivor benefits if you died. You do not have to be poor to receive SSDI — there are no asset limits and no income limits from other sources. A person receiving SSDI can have a house, savings, investments, and other property without affecting their benefit.

The monthly payment amount is based on your earnings record. Someone who earned more and paid more in taxes generally receives a higher SSDI payment than someone who earned less. Your family members — a spouse, ex-spouse, or children — may also be able to receive benefits based on your work record, which can increase the total amount your household receives. SSDI also comes with Medicare after you have been receiving benefits for two years.

The disability definition is the same for both programs

Both SSI and SSDI use the same medical standard to decide whether someone has a disability. Social Security defines disability as the inability to work due to a medical condition that is expected to last at least 12 months or result in death. The condition must be severe enough that you cannot do any work that exists in the national economy, not just your old job.

This is a strict standard. Having a condition that makes work difficult is not the same as meeting Social Security's definition of disability. You must provide medical evidence — test results, doctor's notes, hospital records, imaging — that shows the severity of your condition. Social Security's doctors and specialists review this evidence. If you disagree with their decision, you can request reconsideration, then a hearing before an administrative law judge, and then further appeals.

Working while receiving SSI or SSDI has different rules

If you receive SSI and work, your benefit is reduced by $1 for every $2 you earn above $65 per month. This means you can earn some money without losing your entire benefit, but the reduction is steep. There are also work incentives built into SSI — periods where you can try working without losing Medicaid, and programs that help you keep some of your benefit while you work. These incentives exist because SSI is designed to help people move toward self-sufficiency.

SSDI has a different work rule called the Substantial Gainful Activity (SGA) limit. In 2024, if you earn more than a certain amount per month (the threshold changes yearly), Social Security will assume you are able to work and may stop your benefits. However, SSDI also has work incentives, including a trial work period where you can earn any amount for nine months without losing benefits, and an extended may be able to access period afterward. The goal is to let you test whether you can actually work without immediately losing your safety net.

You can receive both SSI and SSDI at the same time

It is possible to may have access to for both programs. This happens when someone has a work history that qualifies them for SSDI, but their SSDI payment is very small — perhaps because they worked for only a short time or earned very little. If their SSDI payment plus any other income falls below the SSI limit, they can receive SSI to bring their total income up to the SSI payment level. This combined benefit is sometimes called "concurrent benefits."

When you receive both, the programs coordinate. Your SSDI payment is calculated first based on your work record. Then Social Security checks whether you also meet SSI's income and asset limits. If you do, you receive an SSI payment that tops up your SSDI to the SSI level. You would have both the work incentives available under SSDI and the asset limits of SSI, so the rules are more complex, but the combined benefit can provide more total income than either program alone.

How to tell which program you might be dealing with

If you have worked and paid Social Security taxes for several years, SSDI is likely the program you would be dealing with. If you have little or no work history, or your work history is very recent, SSI is more likely. If you are unsure, the Social Security Administration will evaluate you for both programs when you apply. You do not have to choose one or the other — Social Security will determine which programs you meet the requirements for.

When you receive your approval letter or your first payment, it will state which program or programs you are receiving. Your payment stub or benefit statement will also show which program the payment is from. If you have questions about which program you are on, you can call Social Security or visit your local office with your Social Security card and a photo ID.

Frequently Asked Questions

Can I receive SSDI if I have never worked?

No. SSDI requires a work history and Social Security tax contributions. If you have never worked, you would be evaluated for SSI instead, which has no work requirement. If you became disabled before age 22 and a parent is receiving Social Security retirement or disability benefits, you may be able to receive benefits on their record as an adult disabled child.

Does having a savings account disqualify me from SSI?

It depends on the amount. SSI has a $2,000 asset limit for individuals. If your countable assets exceed this, you are not may be able to access for SSI. Some assets do not count — your home, one vehicle, household goods, and certain other items. If you are close to the limit, a Social Security representative can explain which of your specific assets count.

What happens to my SSDI if I start working?

SSDI has a trial work period that allows you to earn any amount for nine months without losing benefits. After that, if your earnings exceed the monthly SGA limit, Social Security will review whether you can still work. You do not automatically lose benefits, but your case will be reassessed. Work incentives exist to help you keep some benefits while you work.

How long does it take to get approved for SSI or SSDI?

Initial decisions typically take three to five months, though it varies. If Social Security denies your case, you can request reconsideration, which takes another few months. If you disagree with reconsideration, you can request a hearing before a judge, which can take six months to over a year depending on your local office's backlog.

Can I receive both SSI and SSDI if I have a small work history?

Yes. If your SSDI payment based on your work record is very low, you may also receive SSI to bring your total income up to the SSI payment level. Social Security evaluates you for both programs and will pay whichever combination you are may be able to access for. The rules become more complex when you receive both, so ask Social Security to explain your specific situation.