6 min read · Last updated September 2, 2026
- Every SNAP benefit equals the maximum allotment for a household’s size minus 30% of its net monthly income, under one federal formula set by the U.S. Department of Agriculture (USDA).
- The maximum monthly allotment for a four-person household in the 48 contiguous states and Washington, D.C. is $994 for fiscal year 2026.
- Six separate deductions, not gross income, determine the “net income” the 30% is calculated from, which is why two households reporting the same paycheck can land on different benefit amounts.
- The excess shelter deduction is capped at $744 a month unless the household includes someone elderly or disabled, at which point the cap is removed entirely.
In this article
- How the formula actually works
- Why deductions decide the number
- A full calculation, start to finish
- Common misconceptions about the number
- Frequently asked questions
The Supplemental Nutrition Assistance Program (SNAP), the federal food-assistance program most people know as food stamps, runs on exactly one calculation nationwide. The U.S. Department of Agriculture (USDA) sets a maximum monthly allotment by household size, then subtracts 30 percent of that household’s net monthly income. For fiscal year 2026, running October 1, 2025 through September 30, 2026, that maximum tops out at $994 a month for a household of four in the 48 contiguous states and Washington, D.C. Nobody looks up a benefit amount on a chart tied to a pay stub. Every dollar comes out of that single subtraction.
How the formula actually works
SNAP applies two income tests before it ever calculates a benefit. Gross income, a household’s total income before any deductions, has to fall under 130% of the federal poverty line for that household size. Net income, gross income minus a specific list of deductions, has to fall under 100% of the federal poverty line. Only households that clear both tests move on to the benefit formula itself.
That poverty line is not something SNAP itself calculates. It comes from a separate federal figure the Department of Health and Human Services updates every January, using a formula that traces back to the 1960s. For a look at how that number is actually set and why it applies the same way nationwide, see how the federal poverty guidelines are set.
The formula is deliberately simple once net income is known: multiply net monthly income by 0.3, then subtract that number from the maximum allotment for the household’s size. The logic behind the 30% figure is that Congress expects a household to spend roughly three-tenths of its own resources on food before SNAP fills in the rest. A household with $0 in net income gets the full maximum allotment. A household right at the net income limit gets close to nothing.
Why deductions decide the number
This is where two households with identical paychecks end up with different benefits. Net income is not simply gross income with a percentage lopped off. USDA allows six deductions, applied in a fixed order, before the 30% math ever starts: a 20% deduction on earned income only, a flat standard deduction ($209 a month for a household of one to three in the 48 states, rising for larger households), a dependent care deduction for childcare tied to work or training, a medical expense deduction for elderly or disabled household members with costs over $35 a month, legally owed child support payments in states that allow it, and an excess shelter deduction.
The excess shelter deduction does the most damage to a simple mental model of the program. It only counts shelter costs, rent or mortgage, taxes, and utilities, that exceed half of a household’s income after the other five deductions are already applied. That excess is capped at $744 a month for most households, but the cap disappears entirely if the household includes someone elderly or disabled. A family paying high rent in an expensive metro area can end up with a meaningfully lower net income, and a meaningfully higher benefit, than a family with the same paycheck paying less for housing.
A full calculation, start to finish
Consider a three-person household with one working adult earning $2,000 a month in wages and no other income. The gross income limit for a three-person household is $2,888, so this household clears the gross test and moves to net income.
| Step | Calculation | Running total |
|---|---|---|
| Start: gross income | $2,000 in monthly wages | $2,000 |
| 20% earned income deduction | $2,000 x 0.20 = $400 | $1,600 |
| Standard deduction (household of 3) | subtract $209 | $1,391 |
| Dependent care deduction | subtract $150 in after-school care | $1,241 |
| Excess shelter deduction | $1,050 rent and utilities, minus half of $1,241 ($620.50), equals $429.50 excess | $811.50 net income |
| Apply the 30% rule | $811.50 x 0.30 = $243.45 | subtract from max allotment |
| Final benefit | $785 maximum allotment for household of 3, minus $243.45 | $541 a month |
This household’s net income of $811.50 sits well under the $2,221 net income limit for a three-person household, so it passes the second test too. The final allotment, $541 a month, is what actually loads onto the household’s Electronic Benefit Transfer card.
Common misconceptions about the number
The most common misunderstanding is that SNAP pays a flat amount by household size, the way some other programs do. It doesn’t. The maximum allotment is only the ceiling; almost no household earning any income actually receives it. A second misconception is that unearned income, such as Social Security, unemployment benefits, or child support received, counts the same as a paycheck. It doesn’t get the 20% earned income deduction, so a household living on $1,500 in unearned income nets less favorably than a household earning the same $1,500 through work.
Frequently asked questions
How often does the SNAP maximum allotment change? USDA updates the maximum allotment, the standard deduction, and the shelter cap once a year, effective every October 1, tied to the cost of the USDA’s Thrifty Food Plan. The current figures apply through September 30, 2026, when the next annual adjustment takes effect.
Does overtime pay count as earned income for SNAP? Yes. Overtime is wages, so it counts as earned income and receives the same 20% earned income deduction as regular pay before the net income calculation runs. It also raises gross income, which is checked against the 130% gross income limit first.
Why does the shelter deduction cap disappear for some households? Congress removed the cap for households with an elderly or disabled member specifically because those households tend to carry higher, less flexible housing and utility costs. Every other household’s excess shelter deduction stops at $744 a month regardless of how much their actual costs exceed that figure.
Is SNAP funded the same way in every state? The benefit dollars themselves are 100% federally funded and calculated by this same formula nationwide. States split the administrative cost of running the program, roughly half and half with the federal government, which is why application processes and wait times can differ by state even though the benefit math does not.
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