SSDI vs SSI: Differences, 2027 Amounts and Who Qualifies

SSDI vs SSI in one sentence: SSDI is insurance you earned by working and paying Social Security taxes, while SSI is a needs-based payment for people with very little income and almost no savings. Both are run by the Social Security Administration (SSA), and both use the same medical definition of disability for adults. That shared office and shared application are why the two are so often confused.

The figures below are the official 2027 amounts SSA published on October 14, 2026, after the 3.6% cost-of-living adjustment. Our COLA 2027 page has the full table of changes.

SSDI vs SSI at a glance

	SSDI	SSI
Full name	Social Security Disability Insurance	Supplemental Security Income
Who it is for	Disabled workers (and some family members)	People who are disabled, blind or 65+ with limited income and resources
Work history needed	Yes, enough recent work credits	No
Asset limit	None	$2,000 individual, $3,000 couple
How the amount is set	Based on your lifetime earnings	Flat federal amount minus countable income
2027 amount	Average disabled worker about $1,701/mo	Up to $1,029/mo individual, $1,544/mo couple (federal)
Funded by	Social Security payroll taxes	General U.S. Treasury funds
Waiting period	5 full months after disability onset	None (paid from the month after you apply, if eligible)
Health coverage	Medicare after 24 months of benefits	Medicaid in most states, usually right away
Family benefits	Yes, for eligible spouses and children	No; each eligible person qualifies separately
Payment day	2nd, 3rd or 4th Wednesday by birth date (some on the 3rd)	1st of the month

Who qualifies for SSDI

SSDI has two tests: a work test and a medical test.

The work test. You earn Social Security credits by working in jobs covered by Social Security. In 2027 one credit takes $1,970 of earnings (up from $1,890 in 2026), and you can earn up to four credits a year. SSA's general rule is that you need 40 credits, 20 of them earned in the last 10 years ending with the year you became disabled. Younger workers can qualify with fewer credits because they have had less time to work.

The medical test. You must be unable to do substantial work because of a medical condition that has lasted or is expected to last at least 12 months, or is expected to result in death. "Substantial" is measured by substantial gainful activity (SGA): $1,770 a month in 2027 for non-blind people and $2,950 for people who are blind.

SSDI does not care about savings, a house, a spouse's income or a retirement account. It is insurance, so what matters is whether you paid into it long enough.

Who qualifies for SSI

SSI is for people who are 65 or older, blind, or disabled, and who have limited income and limited resources. Children with disabilities can qualify too, and in that case part of the parents' income and resources is counted.

• Resources: countable assets must be $2,000 or less for an individual and $3,000 or less for a couple. Your home, one car and some other items are not counted.
• Income: almost all income reduces SSI. SSA ignores the first $20 of most income, the first $65 of monthly earnings and half of earnings above that.
• Living arrangements: if someone else provides your food or shelter, SSI can be reduced.
• Citizenship and residence: you generally must be a U.S. citizen or a qualifying noncitizen and live in the United States.

The medical rules for adults are identical to SSDI. Only the money rules differ.

SSI and SSDI amounts for 2027

Figure	2026	2027
SSI federal payment, individual	$994/mo	$1,029/mo
SSI federal payment, couple	$1,491/mo	$1,544/mo
SSI resource limit, individual / couple	$2,000 / $3,000	$2,000 / $3,000
Average SSDI benefit, all disabled workers	$1,642/mo	$1,701/mo (estimate after COLA)
Average SSDI benefit, disabled worker, spouse and children	$2,970/mo	$3,077/mo (estimate after COLA)
Substantial gainful activity, non-blind	$1,690/mo	$1,770/mo
Substantial gainful activity, blind	$2,830/mo	$2,950/mo
Trial work period month	$1,210/mo	$1,270/mo

The first SSI payment at the new rate is dated December 31, 2026, because January 1 is a holiday. SSDI recipients see the 3.6% increase in their January 2027 payment.

Can you get SSDI and SSI at the same time?

Yes. SSA calls this "concurrent" benefits. It happens when someone qualifies for SSDI but their work record produces a small benefit. SSA treats the SSDI check as unearned income for SSI purposes:

1. Start with the SSDI amount.
2. Subtract the $20 general income exclusion.
3. Subtract what is left from the SSI federal payment.

Example for 2027: your SSDI benefit is $700 a month and you have no other income. Countable income is $700 minus $20, or $680. SSI is $1,029 minus $680, or $349. You receive $700 from SSDI plus $349 from SSI, for a total of $1,049.

That is why the answer to "how much does SSI and SSDI pay together" is usually $1,049 a month in 2027 at the federal level, as long as the SSDI benefit is below that figure and there is no other income. A state supplement can add to it. Once SSDI reaches $1,049 or more, SSI stops, though SSA notes that Medicaid may continue in some cases.

SSI can also fill the gap during SSDI's five-month waiting period. If you qualify financially, SSI may start before SSDI does.

How do I know if I get SSI or SSDI?

• Check the payment date. A payment on the 1st is SSI. A payment on a Wednesday is SSDI. A payment on the 3rd is usually SSDI for long-time beneficiaries or people receiving both.
• Read your award letter or log in to my Social Security. The letter names the program. Your online account shows benefit details and lets you download a benefit verification letter.

Working while on disability benefits

Both programs let you try working, but the rules differ.

SSDI gives a trial work period: nine months (not necessarily in a row) within a rolling 60-month window in which any month you earn more than $1,270 in 2027 counts. You keep full benefits during those months. After that, SSA compares your earnings to SGA.

SSI phases out gradually. After the first $65 of monthly earnings, SSI drops by $1 for every $2 you earn. Section 1619(b) can keep Medicaid going even when earnings stop your SSI cash payment.

How to apply

You can apply for SSDI online at SSA.gov, by phone at 1-800-772-1213, or at a local office. One application can be screened for both programs, so tell SSA if you have limited income and resources. Have your medical records, a list of doctors and medications, your work history for the last five years and your bank details ready. Processing takes months, so apply as soon as you expect your condition to last a year or more.

If you are turned down, you have 60 days from receiving the notice to appeal. Many approvals come at the reconsideration or hearing stage.

Bottom line

SSDI rewards your work record and ignores your savings. SSI ignores your work record and looks hard at your income and savings. For 2027 the SSI federal payment is $1,029 for an individual, the average SSDI disabled-worker benefit is about $1,701, and people with a small SSDI benefit can receive both programs together, typically totalling $1,049 a month. If you are not sure which you qualify for, apply anyway and let SSA screen you for both.

Cover photo: President Franklin D. Roosevelt signs the Social Security Act, August 14, 1935. Public domain, via Wikimedia Commons.