The Social Security Administration pays both SSDI and SSI, but the money comes from different sources

Your disability payments come from the Social Security Administration (SSA), a federal agency. However, the money itself originates from two separate funding streams depending on which program you receive.

If you receive Social Security Disability Insurance (SSDI), your payments come from the Social Security Trust Fund — specifically the Disability Insurance Trust Fund. This fund is financed by payroll taxes (FICA) that you and your employers paid while you worked. You are drawing on money that was set aside in your name.

If you receive Supplemental Security Income (SSI), your payments come from the U.S. Treasury's general revenue. SSI is a needs-based program, not an insurance program, so it does not depend on your work history. The federal government funds it through income taxes and other general revenue sources.

Key Takeaways

  • SSDI payments come from the Disability Insurance Trust Fund, which is built from payroll taxes you paid during your working years.
  • SSI payments come from general federal revenue (income taxes), not from a dedicated trust fund tied to your work record.
  • The SSA processes and mails both types of payments, but the funding source determines how much you receive and what other income or resources affect your payment.
  • If you receive both SSDI and SSI (called "concurrent" benefits), you receive one combined payment, with SSDI counted first and SSI making up the difference if needed.

How the Disability Insurance Trust Fund works

The Disability Insurance Trust Fund is one part of the larger Social Security Trust Fund. Workers and employers each contribute 0.9% of wages (up to the annual wage cap) to fund SSDI, along with Medicare's Hospital Insurance program. That money sits in the trust and is paid out to current beneficiaries.

When you worked and paid Social Security taxes, part of that went into this pool. You do not have a personal account with your name on it — the system is pay-as-you-go. Current workers' taxes pay current beneficiaries. But the trust fund itself holds reserves, and the SSA draws from those reserves when payments exceed incoming tax revenue in any given year.

The size of your SSDI payment depends on your Primary Insurance Amount (PIA), which is calculated from your average earnings record. The SSA uses your 35 highest-earning years (or fewer if you have not worked that long) to compute this amount. Your payment does not change based on how many other people are receiving benefits or how full the trust fund is.

How SSI funding differs from SSDI

SSI is not an insurance program, so it has no trust fund and no connection to your work history. The federal government funds it directly from general revenue each year, similar to how it funds other social programs. This means SSI payments are subject to annual appropriations — Congress must approve funding each fiscal year, though in practice this is routine.

Because SSI is means-tested, your payment amount depends on your other income and resources. The federal SSI payment in 2024 is $943 per month for an individual (this amount changes each January based on cost-of-living adjustments). If you have other income, your SSI payment is reduced dollar-for-dollar after a small exclusion. If you have resources above $2,000 (or $3,000 if you are married), you are ineligible for SSI entirely.

Some states add their own money to the federal SSI payment, creating a state supplement. In those states, you receive both the federal payment and the state addition. The state funds its supplement from its own budget, not from Social Security.

What happens if the Disability Trust Fund runs low

The Disability Insurance Trust Fund has faced periods of depletion in the past. The most recent concern occurred in 2016, when the fund's reserves were projected to run out. Congress did not act, but instead the SSA reallocated funds from the Old-Age and Survivors Insurance (OASI) Trust Fund to the Disability Fund, which is a power Congress granted the agency.

If the trust fund reserves were to become exhausted and Congress did not act, the SSA would still collect incoming payroll taxes. However, it could only pay out benefits up to the amount of incoming revenue — roughly 80% of scheduled benefits, according to the Social Security Trustees. This would mean automatic cuts to all SSDI payments.

This scenario is a policy question, not an when ready threat. The Trustees project the combined trust funds will remain solvent through 2034. But it illustrates why SSDI is sometimes described as facing a "solvency" issue — the funding mechanism depends on the ratio of workers to beneficiaries, which has shifted as the population ages.

Payment methods and timing

The SSA pays both SSDI and SSI by direct deposit to your bank account, or by debit card (the Direct Express card) if you do not have a bank account. Payments are issued on a schedule based on your birth date. Most beneficiaries receive payments on the second, third, or fourth Wednesday of each month.

The SSA does not mail paper checks for ongoing benefits, though it will issue a check if you request it. Direct deposit is the default and fastest method. If you change banks or your account is closed, you must update your information with the SSA to avoid payment delays.

Both SSDI and SSI payments are subject to federal income tax withholding if you request it, though most beneficiaries do not owe federal tax. You can arrange withholding through your my Social Security account or by calling the SSA.

Concurrent benefits and payment coordination

If you are may have access to to both SSDI and SSI — which can happen if your SSDI payment is very low — the SSA pays you one combined payment. Your SSDI is paid first, and then SSI is added to bring you up to the federal SSI payment level (minus any other income you have).

For example, if your SSDI payment is $500 and the federal SSI payment is $943, you would receive $443 in SSI to reach the $943 total. If you have other income, such as earnings from work, that income reduces the SSI portion only, not the SSDI portion.

The payment you receive shows as one amount on your bank statement, but the SSA tracks the SSDI and SSI portions separately for purposes of Medicare, Medicaid, and work incentive programs.

How work affects which program pays you

If you are working and earning above the Substantial Gainful Activity (SGA) level, you may lose SSDI may be able to access, which means the Disability Insurance Trust Fund stops paying you. The SGA threshold in 2024 is $1,550 per month for non-blind individuals (higher for blind individuals).

However, SSDI has work incentives that allow you to test work without when ready losing benefits. The Trial Work Period lets you earn any amount for nine months without affecting your SSDI payment. After that, the SSA applies a different calculation. If you remain disabled and your earnings fall back below SGA, your SSDI payments resume.

SSI has stricter rules. Earnings above $65 per month reduce your SSI payment by $1 for every $2 you earn (after the first $65 exclusion and a $20 general exclusion). If your earnings push you above the SSI payment level, you lose SSI but may keep Medicaid under a work incentive called Medicaid continuation.

Frequently Asked Questions

Can the government take back my disability payments if I no longer need them?

Yes. If the SSA determines you are no longer disabled, your SSDI or SSI payments stop. You have the right to appeal this decision. If you disagree with a medical review finding, you can request reconsideration or a hearing before an administrative law judge. The SSA must prove you are no longer disabled; you do not have to prove you still are.

What happens to my disability payments if I move to another country?

SSDI payments continue if you move abroad, with a few exceptions (certain countries are restricted). SSI payments stop if you leave the United States for more than 30 days. You must notify the SSA before you move. Some countries have agreements with the U.S. that allow SSI to continue, but this is rare and requires advance approval.

Do my disability payments count as income for taxes?

SSDI and SSI are treated differently for tax purposes. Up to 85% of SSDI may be taxable if your combined income (adjusted gross income plus half your SSDI plus any tax-exempt interest) exceeds certain thresholds. SSI is never taxable. You can request federal tax withholding from your payment if you expect to owe tax.

If I inherit money, will it affect my disability payments?

An inheritance does not affect SSDI at all. For SSI, an inheritance counts as a resource. If your total resources exceed $2,000 (or $3,000 if married), you lose SSI may be able to access. However, you can set aside inherited funds in an ABLE account or a special needs trust to protect your SSI without counting the money as a resource.

Who do I contact if my payment is late or wrong?

Contact the SSA directly through your my Social Security account, by phone at 1-800-772-1213, or at your local Social Security office. Bring your Social Security card and a recent payment statement. The SSA can tell you the reason for a delay and correct payment errors, though corrections may take one to two billing cycles to appear.