SSI and SSDI are separate programs with different rules about income, assets, and who can receive them

Supplemental Security Income (SSI) and Social Security Disability Insurance (SSDI) are both run by the Social Security Administration, both require a medical condition that prevents work, and both use the same disability information process. But they are not the same program, and the differences matter for your money, your family members, and how long you can receive benefits.

The core difference: SSDI is based on your work history and the taxes you or a family member paid into Social Security. SSI is a needs-based program for people with low income and few assets, regardless of work history. That one fact changes nearly everything else about how much you receive, whether your spouse or children get money, and what happens if you earn income.

Many people receive one or the other. Some people receive both at the same time, though the rules about how that works are strict. Understanding which program you might receive — or whether you could receive both — requires knowing the specific rules for each.

Key Takeaways

  • SSDI is based on your own work record or a family member's work record; SSI is based on your current income and assets, not work history.
  • SSDI has no income or asset limits; SSI limits your income to roughly $1,000 per month and your assets to $2,000 (these amounts vary by state and change yearly).
  • Your spouse and children can receive benefits on your SSDI record; SSI benefits are individual and do not extend to family members.
  • You can receive both SSDI and SSI at the same time if your SSDI payment is low enough, though the total is capped and varies by location.
  • The medical information is the same for both programs, but the financial rules are completely different.

How work history determines which program you might receive

SSDI requires that you or a family member have worked and paid Social Security taxes for a certain period. The Social Security Administration looks at your work credits — you earn these by working and paying taxes, and you need a specific number depending on your age when you became disabled. If you became disabled before age 24, you need fewer credits. If you were disabled between 24 and 31, you need credits from half the years since you turned 21. After 31, you generally need 40 credits total, with at least 20 earned in the 10 years before you became disabled.

SSI does not care about work history at all. You do not need to have worked, and you do not need anyone else's work record. SSI is purely about your current financial situation: how much money you have coming in each month and how many assets you own.

This is why someone who has never worked can receive SSI but cannot receive SSDI on their own record. It is also why a person who worked for many years but has been out of the workforce for a long time might not have enough recent work credits for SSDI, even though they paid taxes for decades.

Income and asset limits are strict for SSI but do not exist for SSDI

SSI has a resource limit of $2,000 for an individual and $3,000 for a couple (these amounts have not changed since 1989, though some states add their own money and may have different limits). Resources include cash, bank accounts, stocks, and property you own — but not your home or one vehicle. If you have more than the limit, you do not receive SSI.

SSI also has an income limit. In 2024, the federal SSI payment is $943 per month for an individual, though this varies by state. If you have other income — wages, pensions, unemployment, child support — SSI reduces your payment by roughly 65 cents for every dollar you earn above $65 per month. This means earning even a small amount of money can reduce or eliminate your SSI payment.

SSDI has no income limit and no asset limit. You can have a million dollars in the bank and still receive your full SSDI payment. You can work and earn money and still receive SSDI, though there are limits on how much you can earn before your benefits are reduced (this is called the substantial gainful activity threshold, and in 2024 it is $1,550 per month for non-blind individuals). The point is that SSDI does not care about your current finances — it only cares about your work record and your medical condition.

Family members can receive benefits on your SSDI record but not on SSI

If you receive SSDI, your spouse, ex-spouse, and children may be able to receive their own benefits based on your work record. A spouse can receive benefits at any age if they are caring for your child under 16, or at age 62 or older. Children can receive benefits until age 19 if they are in high school full-time, or until age 18 if they are not in school. Disabled adult children can receive benefits for life if their disability began before age 22.

These family members do not need their own work record. They receive benefits because of your record. The total amount paid to your entire family is capped at a percentage of your benefit amount — typically 150 to 180 percent — but individual family members can still receive substantial payments.

SSI does not work this way. SSI is an individual benefit. Your spouse and children do not receive SSI based on your SSI. They can each apply for their own SSI if they meet the disability, age, or blindness requirements and have low enough income and assets. But there is no family connection to the benefit.

You can receive both programs at the same time under specific conditions

Some people receive both SSDI and SSI simultaneously. This happens when your SSDI payment is low enough that you still fall below the SSI income limit for your state. The Social Security Administration pays your SSDI first, then tops up the difference with SSI to bring you to the state's SSI payment level.

This is called concurrent receipt, and it is common for people who have minimal work history and therefore may have access to for a very small SSDI payment. For example, if you have just barely enough work credits to may have access to for SSDI, your payment might be $400 per month. If your state's SSI limit is $943 per month, you would receive your $400 SSDI plus $543 in SSI to reach the state limit.

However, the SSI resource limits still apply. Even if you are receiving SSDI, if you have more than $2,000 in assets, you cannot receive the SSI portion. And if you earn income, it reduces the SSI portion of your payment (though not the SSDI portion).

The medical information is identical, but the financial rules are not

Both SSDI and SSI use the same definition of disability: a medical 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 uses the same doctors, the same medical evidence, and the same decision process to determine whether you are disabled under this definition.

This means that if you are denied for SSDI because your condition does not meet the disability standard, you will also be denied for SSI on medical grounds. Conversely, if you are approved for SSDI, you could potentially also receive SSI if your SSDI payment is low enough and you meet the financial requirements.

But the financial part — income limits, asset limits, family benefits — is completely different between the two programs. You might be approved for disability under both programs but receive only SSDI because your assets are too high for SSI, or receive only SSI because you do not have enough work credits for SSDI.

Frequently Asked Questions

Can I receive SSDI if I have never worked?

No, you cannot receive SSDI on your own record without work history. However, you may be able to receive SSDI based on a parent's work record if you became disabled before age 22, or based on a spouse's record in some cases. Otherwise, you would need to explore SSI if you meet the income and asset requirements.

What happens to my SSI if I inherit money or receive a settlement?

If you receive money that brings your assets above $2,000, your SSI stops until your assets fall back below the limit. Some types of payments are excluded from the resource limit for a period of time — for example, tax refunds are excluded for nine months — but a large inheritance or settlement will affect your may be able to access. You should contact Social Security before accepting any large payment.

If I am approved for SSDI, do I automatically get SSI too?

No. You receive SSI only if your SSDI payment is low enough that you still fall below your state's SSI income limit, and only if you have fewer than $2,000 in assets. Many people approved for SSDI do not receive SSI because their SSDI payment is too high or their assets exceed the limit.

Can my children receive benefits if I am on SSI?

No, SSI does not extend to family members. Your children can each apply for their own SSI if they are disabled, blind, or under 18 and meet the income and asset requirements. They can also receive benefits on your SSDI record if you are receiving SSDI, but not based on your SSI alone.

Does earning money affect SSDI and SSI the same way?

No. Earning money does not reduce your SSDI payment (unless you earn above the substantial gainful activity threshold, which is $1,550 per month in 2024). But earning money reduces your SSI payment by roughly 65 cents for every dollar you earn above $65 per month. If you receive both, your SSDI is protected but your SSI portion shrinks with earnings.