How Does the Housing Authority Calculate Rent?

The housing authority calculates your rent by adding up your household’s annual income, subtracting the deductions you qualify for, and then charging you the highest of four figures: 30% of your monthly adjusted income, 10% of your monthly gross income, a welfare rent if part of your public assistance is designated for housing, or the minimum rent your housing authority has set. That top figure is called your total tenant payment, and it applies whether you live in public housing or use a Housing Choice Voucher (Section 8). What you actually write on the check each month can be lower, because utility allowances and, for voucher holders, the payment standard shift the pieces around.

What Counts as Income

The housing authority adds up every dollar received by anyone in the household who is 18 or older, plus the head of household or spouse regardless of age, plus any unearned income received on behalf of children under 18.¹ The common categories are wages before payroll deductions, Social Security and disability benefits, unemployment, welfare, and regular cash gifts from people outside your household. Net self-employment income counts too, after you subtract operating expenses but not capital debt or expansion costs. Interest, dividends, and other returns on assets also go into the total.

Income That Isn’t Counted

Several categories are excluded outright, and identifying them during your review can meaningfully lower your rent. Earnings of children under 18 don’t count. Neither do foster care payments, insurance settlements for personal or property losses, reimbursements for medical expenses, or income received by a live-in aide.¹

Student financial assistance for tuition, books, and supplies is excluded, along with distributions from Coverdell education savings accounts and 529 plans. Military hostile-fire pay is excluded, and so are amounts set aside under a Plan to Attain Self-Sufficiency for people receiving SSI.¹ Flag any of these at your review so they aren’t accidentally added in.

Deductions That Lower the Calculation

Once gross income is added up, the housing authority subtracts mandatory deductions to reach your adjusted income. That adjusted number is what drives the 30% figure in the rent formula, so each deduction directly reduces the rent you’re charged. For 2026 the amounts are:²

$500 per dependent, meaning anyone under 18, a full-time student, or a person with a disability who is not the head of household or spouse.
$550 if the head of household, spouse, or sole member is 62 or older, or disabled.
Unreimbursed medical expenses that exceed 10% of annual income, for elderly or disabled families only.³
Reasonable childcare costs that let a household member work or attend school.

The 10% medical threshold is worth flagging. Before January 2024 it was 3% of annual income. Under the Housing Opportunity Through Modernization Act, it stepped up, and by 2026 most families have transitioned to the full 10%.³ If you had significant medical expenses under the old rule, you now need substantially higher costs before the deduction kicks in.

How Assets Change the Number

There’s an outright eligibility cap first: a household whose net family assets exceed $105,574 in 2026 is not eligible for assistance at all.² Net family assets are the cash value of bank accounts, real property, investments, and similar holdings, minus the reasonable costs of selling them. Retirement accounts, education savings accounts, and personal property essential for daily living, employment, education, or health are excluded from the cap.⁴

Below the cap, assets can still push your rent up. When net family assets exceed $52,787 in 2026 and actual income from those assets can’t be determined, the housing authority imputes a return at HUD’s current passbook rate and adds it to your annual income.¹ At or below that threshold, a simple self-certification is enough.⁵

The Four-Way Comparison That Sets Your Rent

With adjusted income in hand, the housing authority runs four calculations and charges you whichever is highest:⁶

30% of monthly adjusted income (annual adjusted income divided by 12, times 0.30).
10% of monthly gross income, before deductions.
A welfare rent, if part of your public assistance is specifically designated for housing.
The minimum rent set by your housing authority.

For most tenants the 30%-of-adjusted-income figure wins. For households with very low income and large deductions, the 10%-of-gross calculation or the minimum rent floor can end up being the highest number and become the total tenant payment.

One important point about that total tenant payment: it covers rent and utilities combined. It isn’t necessarily the check you write to your landlord.

How Utility Allowances Change What You Actually Pay

If you pay any utilities directly, the housing authority assigns a utility allowance that estimates reasonable monthly utility costs for your unit type. Your rent to the landlord is your total tenant payment minus that allowance, on the theory that a portion of your total tenant payment is already going to the utility company.⁷

If the utility allowance is larger than your total tenant payment, your rent to the landlord drops to zero and the housing authority sends you a utility reimbursement payment to help cover your bills.⁷ This is most common in units where tenants pay heating in expensive-to-heat areas.

Vouchers vs. Public Housing

The total tenant payment formula is the same in both programs, but the voucher program adds a layer called the payment standard. Each housing authority sets a payment standard for its area and unit sizes, typically between 90% and 110% of HUD’s Fair Market Rent.⁸

If you rent a unit whose gross rent (rent plus utilities) is at or below the payment standard, you pay your total tenant payment and the housing authority covers the rest. Pick a more expensive unit and you pay the difference out of pocket on top. At initial move-in, your combined housing cost cannot exceed 40% of your monthly adjusted income.⁹ That 40% ceiling drops away after the initial lease-up, so future landlord rent increases can push your share higher.

In public housing, the payment-standard layer doesn’t exist. The housing authority owns the unit and simply charges you your total tenant payment, adjusted for any utility allowance.

Minimum Rent and Hardship Exemptions

Housing authorities can set a minimum rent between $0 and $50 in public housing, the voucher program, and Section 8 moderate rehabilitation. In other Section 8 programs the minimum is $25. If you cannot afford even that, you can request a hardship exemption, which the housing authority must grant if your situation falls into one of these categories:¹⁰

You’ve lost eligibility for a government assistance program or are waiting on a determination.
You would be evicted if forced to pay the minimum rent.
Your income has dropped due to changed circumstances, including job loss.
There has been a death in the family.
Any other circumstance the housing authority or HUD recognizes.

Once you request the exemption, the housing authority must suspend the minimum rent starting the following month while it evaluates. In public housing, you cannot be evicted for nonpayment of minimum rent during a 90-day period after your request. If the hardship turns out to be temporary, the minimum rent is reinstated retroactively, but the housing authority must offer a reasonable repayment plan.¹⁰

Annual Reviews and Reporting Changes Along the Way

Housing authorities must reexamine every family’s income and household composition at least once every 12 months.¹¹ At each annual review, the housing authority verifies income, applies updated deductions, checks whether your unit size still fits your household, and recalculates your total tenant payment. Your rent may go up or down.

Between annual reviews, interim reexaminations handle significant changes like a job loss, a new household member, or an income increase. Federal rules don’t set a universal reporting deadline. Each housing authority sets its own window in its policies. HUD suggests a 10-day reporting window for families and 30 days for the housing authority to process the interim review.¹² Check your lease or the admissions plan for the specific deadline your housing authority enforces.

What Happens If You Don’t Report Income Changes

If the housing authority later discovers you were charged less than the formula required because you underreported or didn’t report income, you owe retroactive rent for the entire period of underpayment. The housing authority can calculate back rent for as many years as it has documentation.¹³

If you can’t pay in a lump sum, you’ll sign a written repayment agreement. The monthly repayment amount added to your regular rent contribution generally should not exceed 40% of your monthly adjusted income. Missing payments, or refusing to sign, can end your tenancy or housing assistance.¹³ Housing authorities cross-reference what you report against state wage databases and federal records through HUD’s Enterprise Income Verification system, so unreported wages are routinely flagged. Reporting a change promptly, even one you know will raise your rent, is much cheaper than the alternative.

1
eCFR. 24 CFR 5.609 – Annual Income
2
U.S. Department of Housing and Urban Development. 2026 HUD Inflation-Adjusted Values
3
eCFR. 24 CFR 5.611 – Adjusted Income
4
U.S. Department of Housing and Urban Development. HUD Multifamily Housing HOTMA Training Series – Net Family Assets
5
eCFR. 24 CFR 5.618 – Net Family Assets
6
eCFR. 24 CFR 5.628 – Total Tenant Payment
7
U.S. Department of Housing and Urban Development. Calculating Rent and Housing Assistance Payments
8
eCFR. 24 CFR 982.503 – Payment Standard Areas, Schedule, and Amounts
9
eCFR. 24 CFR 982.508 – Maximum Family Share at Initial Occupancy
10
eCFR. 24 CFR 5.630 – Minimum Rent
11
eCFR. 24 CFR 882.515 – Reexamination of Family Income and Composition
12
HUD Exchange. ACOP Toolkit – Annual and Interim Reexaminations Fact Sheet
13
U.S. Department of Housing and Urban Development. PIH Notice 2018-18 – EIV Administrative Notice