The difference comes down to your work history and how much you earned

SSDI (Social Security Disability Insurance) is based on your own work record or your parent's work record if you became disabled before age 22. SSI (Supplemental Security Income) is a needs-based program that does not require a work history — it depends on your income and assets right now.

The fastest way to know which one you receive is to check your Social Security statement online, call Social Security directly, or look at the paperwork you received when your benefits started. The approval letter will say either "SSDI" or "SSI" explicitly. If you receive both, the letter will say so.

Many people receive both programs at the same time. This happens when someone qualifies for SSDI based on work history but the SSDI payment is low enough that they also meet SSI's income limits. Social Security calls this "concurrent benefits."

Key Takeaways

  • Your Social Security approval letter states which program you receive — SSDI, SSI, or both — so checking that document is the most direct answer.
  • SSDI requires a work history (yours or a parent's); SSI requires low income and assets but no work history at all.
  • You can receive both programs simultaneously if your SSDI payment falls below SSI's income limit for your state.
  • Your My Social Security account online shows your current benefit type and payment amount each month.
  • If you are unsure, calling Social Security at 1-800-772-1213 takes about 10 minutes and gives you a definitive answer.

Check your Social Security account online

The easiest method is to log into your My Social Security account at ssa.gov. Once you are signed in, click "Benefit Verification" or "View Your Benefit Statement." The page will show your current monthly payment and the program type next to it.

If you do not have an online account, you can create one in about five minutes using your email, Social Security number, and a phone number. Social Security will send you a verification code by text or email. After that, you can check your benefit type anytime without calling.

Your statement also shows the date your benefits began and any recent changes to your payment. This is useful if you have been receiving benefits for years and want to confirm nothing has changed.

Look at your approval letter or award notice

When Social Security first approved your benefits, they sent you a letter called an Award Notice or Approval Letter. This document states the program name clearly — usually in the first or second paragraph. It also lists your monthly payment amount and the date benefits begin.

If you no longer have the original letter, you can request a copy by calling Social Security at 1-800-772-1213 or by visiting your local Social Security office. They can mail or email you a replacement within a few business days. You will need your Social Security number and date of birth.

The Award Notice also explains what you must report if your situation changes — for example, if you start working or if your living situation changes. SSDI and SSI have different reporting rules, so keeping this letter handy is useful.

Call Social Security to confirm

If you cannot find your letter or access your online account, call the Social Security Administration at 1-800-772-1213. Have your Social Security number ready. A representative will ask which program you think you receive and will confirm the correct one within a minute or two.

Social Security's phone lines are busiest early in the week and early in the month. Calling on a Wednesday, Thursday, or Friday afternoon usually means a shorter wait. You can also request a callback instead of waiting on hold.

If you are deaf or hard of hearing, use the TTY number 1-800-325-0778. If you speak a language other than English, Social Security has interpreters available at no cost.

Understand what each program means for your benefits

If you receive SSDI, your payment is based on your lifetime earnings record (or your parent's record). Your payment does not change if you inherit money, receive gifts, or have savings — only work income above a certain amount affects your benefits. You can work part-time and still receive SSDI as long as your earnings stay below the limit (called Substantial Gainful Activity, or SGA).

If you receive SSI, your payment is based on your current income and assets. If you have more than $2,000 in savings (or $3,000 if you are married), you may lose SSI benefits. If you earn money from work, SSI reduces your payment by roughly 65 cents for every dollar you earn after the first $65 per month. This means SSI is more restrictive about money you have right now.

If you receive both SSDI and SSI (concurrent benefits), the SSDI rules explore to your work income, but the SSI rules explore to your savings and other resources. Social Security will explain which rules affect you when you call or visit in person.

What to do if Social Security says you receive the wrong program

If you believe you are receiving the wrong benefit type, contact Social Security when ready. This can happen if you were approved for one program but should have been approved for another, or if your situation has changed and you now may have access to for a different program.

For example, if you were approved for SSI but later have a work history that qualifies you for SSDI, Social Security can switch you over. Or if you receive SSDI but your income drops so low that you also may have access to for SSI, they can add SSI to your benefits. These changes are not automatic — you must report the change to Social Security.

Call 1-800-772-1213 and explain what you think has changed. A representative will review your record and tell you whether you may have access to for a different program. If you do, they will start the process to switch or add benefits.

Frequently Asked Questions

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

Yes. This is called concurrent benefits and happens when your SSDI payment is low enough that you also meet SSI's income and resource limits. Social Security will pay you both amounts, though the total is usually capped at your state's SSI maximum payment. Ask Social Security whether you receive concurrent benefits when you call.

Does my payment amount tell me which program I receive?

Not always. SSDI payments vary widely based on your work history, while SSI payments are usually similar within a state. But the only reliable way to know is to check your account, your Award Notice, or call Social Security directly. Payment amount alone is not proof.

What if I lost my Award Notice and cannot access my online account?

Call Social Security at 1-800-772-1213 with your Social Security number and date of birth. They will tell you which program you receive and can mail you a replacement Award Notice. You can also visit your local Social Security office in person with a photo ID.

If I switch jobs or my income changes, do I need to tell Social Security which program I receive?

You must report work income changes to Social Security, but you do not need to tell them which program you receive — they already know. However, the rules for reporting are different for SSDI and SSI, so knowing which one you receive helps you understand what you must report and when.

Can Social Security make a mistake about which program I receive?

Rarely, but yes. If you believe you were approved for the wrong program, contact Social Security to ask them to review your case. Bring any documents that show your work history or income at the time you applied. If Social Security made an error, they can correct it and adjust your payment.