Your monthly SSI payment is calculated by starting with the Federal Benefit Rate, subtracting your countable income after a series of exclusions, and then adjusting for your living arrangement and any income deemed to you from a spouse or parent. That is the whole shape of how SSI is calculated. Everything else is detail about which dollars count, which get discounted, and which get ignored.
The federal maximum for 2026 is $994 per month for an eligible individual and $1,491 for an eligible couple.1Social Security Administration. SSI Federal Payment Amounts If you have no countable income and live on your own, that is what you receive. Most states add a supplementary payment on top, which varies by state and living arrangement.2Social Security Administration. Understanding Supplemental Security Income SSI Benefits
One thing to set aside before the math: SSI also has a resource limit ($2,000 for an individual, $3,000 for a couple) that determines whether you qualify in the first place.3Social Security Administration. Who Can Get SSI Resources are what you own; they gate eligibility. The payment calculation itself runs on income.
Earned Income and Unearned Income Are Treated Differently
Everything you receive falls into one of two buckets, and each is treated differently in the formula.
Earned income is wages, net self-employment earnings, and certain royalties and honoraria.4Social Security Administration. SSA Handbook 2605 – What Is Earned Income Employer-provided meals or lodging count as earned income too, with an exception for domestic and agricultural workers, where in-kind pay is treated as unearned.
Unearned income is everything else: Social Security retirement or disability benefits, pensions, interest, dividends, unemployment compensation, and cash from friends or family.5Social Security Administration. SSI Income – 2025 Edition
Some common income sources are not counted at all. SNAP benefits, Section 8 vouchers, rent rebates, property tax refunds, and TANF payments are all ignored.6Social Security Administration. Exceptions to SSI Income and Resource Limits Receiving them will not shrink your SSI check.
The Exclusions That Turn Gross Income Into Countable Income
Once SSA has sorted your income, it applies exclusions in a set order to arrive at your “countable income,” which is the number that actually reduces your payment.
The $20 general income exclusion goes against unearned income first. If your unearned income is less than $20, whatever is left of the exclusion carries over to reduce your earned income.5Social Security Administration. SSI Income – 2025 Edition
Then SSA turns to earned income. The first $65 is excluded outright. Of what remains, only half is counted.5Social Security Administration. SSI Income – 2025 Edition That 50-percent discount is why part-time work rarely wipes out an SSI check and often leaves you meaningfully better off than not working at all.
Your countable income is then subtracted from the FBR. That is your federal SSI payment for the month. If countable income equals or exceeds the FBR, the federal payment is zero.7Social Security Administration. POMS SI 00810.350 – Income Break-Even Points General Information For someone with only unearned income, that break-even point is $1,014. For someone with only earned income, it is $2,053, because of the 50-percent discount.
A Worked Example
Say you receive $100 a month in Social Security and earn $500 in wages.
- Unearned income: $100 minus the $20 general exclusion leaves $80 countable.
- Earned income: $500 minus the $65 exclusion leaves $435, then divided by two is $217.50 countable.
- Total countable income: $80 plus $217.50 is $297.50.
- Federal SSI payment: $994 minus $297.50 is $696.50.
Add any state supplement to that federal figure for your total check.
Work Incentives That Shelter More Income
Congress built several programs into SSI that let you exclude income beyond the standard $20 and $65. Each one plugs into the formula at a specific point.
If you are under 22 and regularly attending school, the Student Earned Income Exclusion lets you exclude up to $2,410 of earned income per month in 2026, with an annual cap of $9,730.8Social Security Administration. What’s New in 2026 It is applied before the $65 and 50-percent exclusions, so a student’s part-time paycheck can produce zero countable earned income in many months.
Impairment-Related Work Expenses cover out-of-pocket costs you incur because of your disability in order to work: things like vehicle modifications, service animals, prosthetic devices, and specialized transportation. The expense has to be necessary because of your impairment, paid by you without reimbursement, and reasonably priced.9Social Security Administration. Ticket to Work – Impairment-Related Work Expenses SSA deducts qualifying amounts from your earned income during the calculation.
Blind Work Expenses are broader. If you receive SSI on the basis of blindness, any reasonable, unreimbursed cost of earning income is deductible, whether or not the expense is tied to blindness. That includes income taxes withheld from your paycheck, transportation to work, meals during work hours, and professional dues.10Social Security Administration. POMS SI 00820.535 – Blind Work Expense The deduction is applied after the standard exclusions but cannot push earned income below zero.
A Plan to Achieve Self-Support (PASS) lets you set aside income and resources toward a specific occupational goal. Set-aside amounts are excluded from the calculation.11Social Security Administration. POMS SI 00810.430 – Plan to Achieve Self-Support as an Income Exclusion SSA has to approve the plan in advance, and it must spell out the goal, a timeline, and how the money will be spent.
Where You Live Changes the Starting Point
Living arrangements can shift the calculation in two ways, both tied to whether someone else is covering your shelter costs. Free food, as of September 30, 2024, is no longer counted as in-kind support.12Social Security Administration. SSI Spotlight on One Third Reduction Provision
The one-third reduction rule applies when you live in someone else’s household for the entire month and receive both meals and shelter there without paying your share. In that case, SSA cuts the FBR itself by one-third before running the rest of the calculation. For 2026 the starting point drops from $994 to $662.67.13Social Security Administration. Code of Federal Regulations 416.1130 – Introduction Pay your proportional share of household costs and the reduction does not apply.12Social Security Administration. SSI Spotlight on One Third Reduction Provision
The Presumed Maximum Value rule handles other free-shelter situations, like a friend paying your rent while you live in your own place. Here SSA treats the shelter as unearned income valued at one-third of the FBR plus $20, which is $351.33 in 2026.14Social Security Administration. POMS SI 00835.300 – Presumed Maximum Value Rule You can rebut the presumption by showing the actual value is lower, and SSA will use the lower figure.
Income Deemed From a Spouse or Parent
If you live with an ineligible spouse or, as a child, with ineligible parents, some of their income can be treated as yours in the calculation. This surprises many applicants.
For a spouse, SSA figures your spouse’s income using the normal exclusions, then subtracts an allocation for each ineligible child in the household. The per-child allocation is the difference between the couple FBR and the individual FBR, which is $497 for 2026 ($1,491 minus $994). Each child’s own income reduces that allocation dollar for dollar.15Social Security Administration. Code of Federal Regulations 416.1163 – How We Deem Income to You from Your Ineligible Spouse If the spouse’s remaining income exceeds $497, SSA combines it with yours, applies exclusions, and subtracts from the couple FBR of $1,491. If it does not exceed $497, none of the spouse’s income is deemed, and your SSI is calculated against the individual FBR using only your own income.
For a child under 18 living with ineligible parents, SSA runs a parallel process: figure the parents’ countable income, subtract allocations for ineligible children in the home, and deem any excess to the eligible child as unearned income. If more than one child in the household qualifies for SSI, the deemed income is split equally among them, and the $20 general exclusion still applies to what is deemed.16Social Security Administration. POMS – Deeming to Eligible Children from Parents Who Are Ineligible Because of Excess Income
Why Your Check Reflects Income From Two Months Ago
SSA does not use current-month income to calculate the current payment. Under Retrospective Monthly Accounting, your payment is based on countable income from two months earlier.17Social Security Administration. SSA Handbook 2183 – Retrospective Monthly Accounting Wages you earn in March show up in your May payment.
Two exceptions to know. During your first three months of eligibility, SSA uses income from the first month of eligibility rather than looking back two months, and a one-time payment received in that first month is removed for the second and third months so a lump sum does not drag down multiple checks.17Social Security Administration. SSA Handbook 2183 – Retrospective Monthly Accounting And in January and February, if you also receive Social Security, the annual COLA increase to that benefit is used immediately in the SSI calculation instead of after the usual two-month lag.
Reporting Changes Keeps the Calculation Right
The calculation only works if SSA has current information. You have to report changes in income, living arrangements, household composition, resources, and marital status no later than the tenth day of the month after the change.18Social Security Administration. Report Changes to Your Situation While on SSI You can report through your local office, by calling 1-800-772-1213, or through your my Social Security account.
Late reporting produces overpayments, which SSA will recover, generally by withholding up to 10 percent of your total monthly income from future payments.19Social Security Administration. Code of Federal Regulations 416.571 The changes people most often miss are small: a friend starts covering part of the rent, a grandchild moves in, a new savings account gets opened. Each of those feeds directly back into the formula.