SSI Calculator for a Child: 2026 Deeming Formula and Example

To run an SSI calculator for a child in 2026, start with the federal benefit rate of $994 per month and subtract the portion of parental income the Social Security Administration “deems” available to the child. Most families receive less than the full $994 because of that deeming process, but the calculation follows a fixed sequence of allowances and exclusions that you can work through with a pay stub and a few household details.

The 2026 Numbers You Need

Every figure in the calculation ties back to the federal benefit rate, which rose 2.8 percent for 2026.1Social Security Administration. Cost-of-Living Adjustment (COLA) Information Keep these amounts in front of you:

  • Individual federal benefit rate (FBR): $994 per month
  • Couple FBR: $1,491 per month
  • Ineligible child allocation: $497 per month per non-disabled sibling
  • General income exclusion: $20 per month
  • Earned income exclusion: $65 per month, plus half the remainder
  • Student earned income exclusion: $2,410 per month, up to $9,730 per year
  • Resource limit: $2,000 for a one-parent household, $3,000 for two parents

The $994 individual rate is both the starting point for the child’s benefit and the parental living allowance in a single-parent home. The $1,491 couple rate is the parental living allowance when two parents live in the household.2Social Security Administration. SSI Federal Payment Amounts for 2026 Some states add a supplement on top of the federal amount, so the actual check may run slightly higher depending on where you live.

The Step-by-Step Deeming Formula

Parental deeming applies when the child is under 18 and lives at home with a parent or parents.3Social Security Administration. Spotlight on Deeming Parental Income and Resources Federal regulations require the deductions to run in a specific order, and applying them out of sequence produces the wrong result.4Social Security Administration. 20 CFR 416.1165 – How We Deem Income to You from Your Ineligible Parent(s)

Before you start, separate parental income into two buckets. Earned income is gross wages before deductions. Unearned income is everything else: Social Security benefits, pensions, interest, dividends, child support paid to the parents, and similar. Set aside anything the SSA disregards entirely, including SNAP benefits and federal earned income tax credit refunds.5eCFR. 20 CFR 416.1161 – Income We Do Not Count6Social Security Administration. 20 CFR 416.1112 – Earned Income We Do Not Count

Then work the steps in order:

  1. Subtract $497 from unearned income for each non-disabled child under 18 (or under 22 if a student) living in the home. If a sibling has their own income, reduce that sibling’s $497 allocation by the amount of their income first. If parental unearned income runs out before the allocation is used up, apply the leftover against earned income.
  2. Subtract the $20 general exclusion from what remains of unearned income. If unearned income is already at zero, apply the $20 to earned income.
  3. From remaining earned income, subtract $65, then divide by two. Only half of earned income above $65 gets counted.
  4. Add remaining unearned income and remaining earned income together. That total is countable parental income.
  5. Subtract the parental living allowance: $1,491 for a two-parent home, $994 for a single parent.
  6. Whatever is left is deemed income to the child. Subtract it from $994 to get the child’s monthly SSI payment. If the result of step 5 is zero or negative, the child receives the full $994.

A Worked Example

Take a two-parent household with $4,500 in monthly wages, $200 in bank interest, one disabled child, and one non-disabled sibling with no income of their own.

Step 1: Subtract the $497 allocation for the sibling. The $200 of unearned income drops to $0, and the remaining $297 comes off earned income. Earned income is now $4,500 − $297 = $4,203.

Step 2: With no unearned income left, the full $20 general exclusion comes off earned income: $4,203 − $20 = $4,183.

Step 3: Apply the earned income exclusion. $4,183 − $65 = $4,118. Divide by two: $2,059.

Step 4: Countable parental income is $0 + $2,059 = $2,059.

Step 5: Subtract the couple living allowance. $2,059 − $1,491 = $568 in deemed income.

Step 6: Child’s SSI payment is $994 − $568 = $426 per month.

Household composition swings the answer sharply. If this family had two non-disabled siblings instead of one, a second $497 allocation would erase most of the deemed amount and push the child’s benefit closer to the full $994. Count everyone in the home carefully before running the numbers.

When Living Arrangements Override the Formula

The deeming formula assumes the child lives with a parent. If the child instead lives in someone else’s household for a full calendar month and receives both food and shelter from that person without paying a proportionate share, the SSA skips the deeming math and applies the one-third reduction rule: it counts one-third of the federal benefit rate as additional unearned income to the child.7Social Security Administration. 20 CFR 416.1131 – The One-Third Reduction Rule In 2026 that reduction is roughly $331, which drops the maximum benefit from $994 to about $663.

The common scenario is a child staying with grandparents who cover rent, utilities, and groceries. If a parent pays for the child’s food and shelter out of pocket while living in a relative’s home, the one-third rule does not apply and standard deeming controls. Keeping receipts or a written agreement about who pays for what can prevent the SSA from applying the wrong rule and can move the monthly payment by hundreds of dollars.

What the Child’s Own Earnings Do

A child who works while attending school gets a substantial break called the student earned income exclusion. In 2026, up to $2,410 per month of the student’s own wages is excluded, capped at $9,730 for the year.8Social Security Administration. Student Earned Income Exclusion for SSI The exclusion comes off before any other earned income deductions, so it shelters a large slice of wages from touching the SSI payment.

To qualify, the child must be under 22, regularly attending school (including certain home-schooling and vocational programs), and not married or the head of a household.9Social Security Administration. Understanding Supplemental Security Income SSI for Children – 2025 Edition A teenager earning $2,000 at a summer job would have the entire amount excluded, with no reduction to the monthly SSI check. Families who don’t know about the exclusion sometimes discourage a child from working out of fear of losing benefits, when the math actually protects the wages.

The Resource Check That Comes First

Before running any income calculation, confirm the household’s countable assets are below the resource limit. One parent: $2,000. Two parents: $3,000.10eCFR. 20 CFR 416.1205 – Limitation on Resources Exceeding the limit disqualifies the child regardless of income. The SSA checks resources at the start of each month, so a tax refund landing on the first can temporarily push a family over.

Countable resources include cash, bank balances, stocks, bonds, and property beyond the family home. Several categories are excluded:

If an ABLE account is available for the child, moving excess cash there before month-end keeps it from counting against the limit.

What Changes at Age 18

Two shifts hit the calculation the month after the child turns 18. Parental deeming stops entirely.3Social Security Administration. Spotlight on Deeming Parental Income and Resources Parental income and resources no longer count against the benefit, and a young adult who was denied SSI or received a reduced payment because of parental income may suddenly qualify for the full $994. A previous denial is worth revisiting after the 18th birthday.

The SSA also conducts an age-18 redetermination under the adult disability standard, which asks whether the impairment prevents substantial gainful work. In 2026, substantial gainful activity means earning more than $1,690 per month.15Social Security Administration. Determinations of Substantial Gainful Activity Some conditions that clearly qualified a child may not meet the adult test if the young adult is physically capable of work, so updated medical documentation should be in place well before the birthday.

Keeping the Calculation Accurate

The result of your calculation is only good until the household changes. Any change in income, living arrangements, resources, or who lives in the home must be reported no later than 10 days after the end of the month in which it happened.16Social Security Administration. Understanding Supplemental Security Income Reporting Responsibilities Missing that deadline can trigger a penalty of $25 to $100 per occurrence, and knowingly withholding information can suspend payments for six months on the first offense, longer for subsequent violations.

Late reporting also creates overpayments. If income rose two months ago and you didn’t report it, the SSA will recalculate retroactively and demand the excess back, typically by withholding 10 percent of the monthly SSI payment.17Social Security Administration. Resolve an Overpayment Common triggers families overlook include a parent starting a new job, a change in child support, a non-disabled sibling turning 18 or moving out, and a relative moving into or out of the home. Each of these changes at least one input in the deeming formula, and running the numbers again the same month is the best defense against a surprise bill later.