Last updated 2026-07-10
TL;DR
Your rent portion under the Housing Choice Voucher program is generally 30% of your adjusted monthly income, minus a utility allowance if you pay utilities yourself. The housing authority pays the landlord the difference, up to its local payment standard. If rent runs above the payment standard, you cover the gap on top of your 30% share.
What is the basic formula the housing authority uses?
You pay about 30% of your adjusted monthly income toward rent and utilities. The housing authority pays the rest, up to a ceiling called the payment standard. That's the whole idea in one breath. [1]
The federal rule sits in 24 CFR Part 982. Your family share at initial lease-up cannot exceed 40% of monthly adjusted income, and most PHAs build their numbers so the baseline share lands at exactly 30%. [1]
Here's the math, broken out:
1. Start with your annual gross income from all sources. 2. Subtract HUD-approved deductions to get adjusted annual income. 3. Divide by 12 for adjusted monthly income (AMI). 4. Multiply by 0.30. That's your Total Tenant Payment (TTP). 5. Subtract your utility allowance, if any. What's left is your monthly rent-to-owner payment.
The housing authority then pays the landlord the Housing Assistance Payment, or HAP: actual rent minus your TTP. But the HAP cannot go above the payment standard minus your TTP. Charge more than the payment standard, and you personally cover the excess on top of your 30%. [1]
Every calculation flows from one number: your adjusted monthly income. Get that right and the rest falls into place.
What counts as income in the housing authority's calculation?
HUD's income definition is wide. Under 24 CFR 5.609, it counts wages, salaries, tips, net self-employment income, Social Security, SSI, disability payments, pension and retirement income, unemployment, alimony, child support, and most regular contributions from people outside the household. [2]
A few things stay out entirely. Full-time student earnings above $480 for a dependent, the income of a live-in aide, certain adoption assistance payments, and earnings of a household member under 18 are all excluded. [2] The HUD Occupancy Handbook (4350.3) carries the full exclusion list and it runs several pages, so if you have an odd income source, ask your caseworker straight out whether it counts.
One thing trips people up. Overtime counts even when it's irregular, figured from year-to-date earnings averaged over the months you worked. The housing authority usually wants pay stubs covering the last 30 to 60 days and may ask for a letter from your employer.
Self-employment income is gross receipts minus legitimate business expenses. Keep records. Housing authorities do audit this.
What deductions lower your adjusted income?
HUD allows a fixed set of deductions from annual income to reach "adjusted annual income," which is what your 30% actually rests on. [3]
The standard deductions under 24 CFR 5.611 are:
| Deduction | Amount (as of 2024) |
|---|---|
| Dependent deduction (per dependent) | $480/year |
| Elderly or disabled family deduction | $400/year |
| Medical expense deduction (elderly/disabled only) | Unreimbursed expenses exceeding 3% of annual income |
| Disability assistance expense deduction | Reasonable expenses enabling a disabled adult to work, up to earned income of that adult |
| Child care deduction | Reasonable costs allowing adult to work or attend school, up to earned income of the lowest-earning adult |
The elderly/disabled medical deduction is the one most people miss. If your household has a member who is 62 or older or disabled, you can deduct medical costs above 3% of annual income. On a $15,000 income, anything past $450 in unreimbursed medical spending cuts your adjusted income dollar for dollar. Prescription copays, dental, vision, Medicare premiums, home health aides, they all count if insurance didn't cover them. [3]
Bring documentation: receipts, Medicare Summary Notices, pharmacy printouts. The deduction is real, but the housing authority can't apply it without proof.
What is the payment standard and how does it affect your share?
The payment standard is the most a housing authority will pay for a given bedroom size in a given area. The local PHA sets it, but it has to land between 90% and 110% of HUD's published Fair Market Rent (FMR) for that unit size and market, unless HUD approves an exception. [4]
HUD updates Fair Market Rents every year, usually publishing them in late September for the coming federal fiscal year. You can look them up by metro area or county in HUD's FMR database. [4]
Payment standards matter because they set the HAP ceiling. Say the payment standard for a two-bedroom in your area is $1,400 and the landlord charges $1,600. The housing authority still pays only as if rent were $1,400. You'd owe your 30% share plus the $200 difference. That gap is sometimes called a "top-up" payment.
Here's a concrete example. Your adjusted monthly income is $1,200. Your TTP is $360 (30% of $1,200). The payment standard is $1,300. The landlord charges $1,300.
- HAP = $1,300 (rent) minus $360 (TTP) = $940
- You pay: $360 to the landlord
Now suppose the landlord charges $1,550:
- HAP ceiling = $1,300 (payment standard) minus $360 (TTP) = $940
- You pay: $360 + ($1,550 minus $1,300) = $360 + $250 = $610
At initial lease-up, HUD caps your share at 40% of adjusted monthly income. But renewals and rent increases can push that share higher over time if you don't move or the landlord keeps raising rent. [1]
For a broader look at how local PHAs set these limits, see our overview of the housing choice voucher program.
How does the utility allowance change what you actually pay?
Pay any utilities directly (gas, electric, water, trash) and the housing authority gives you a utility allowance. That allowance comes off your TTP to get your actual rent payment to the landlord. [5]
The PHA sets the allowance based on the typical cost to heat and cool a unit of that size in that climate, not your actual bill. PHAs have to update their utility allowance schedules at least once a year. [5]
If your utility allowance runs bigger than your TTP, you get a utility reimbursement payment from the housing authority every month. That's real money, deposited or mailed to you. It covers utilities for someone whose income is low enough that 30% of it doesn't even reach the typical utility cost.
Example: TTP is $250. Utility allowance for the unit is $300. You owe $0 rent to the landlord, and the housing authority sends you $50 a month toward utilities. [5]
Ask your housing authority for a copy of its utility allowance schedule. These are public documents, and they vary a lot by bedroom size, unit type (apartment vs. house), and heating fuel.
Does your rent share change when your income changes?
Yes, and this is where a lot of voucher holders get confused. Your share is tied to your certified income, not whatever you happen to be earning this week.
Most housing authorities run an annual recertification. At that appointment you report all income sources, and the PHA recalculates your adjusted income, your TTP, and your share. Income up, share up. Income down, share down.
Between annual recertifications, most PHAs require you to report income increases above a threshold, often a $200/month change or any new income source. Skip the report, and if the housing authority spots an undisclosed increase at your next recertification, you may owe back rent. That bill can get big.
Interim recertifications cut the other way too. Lose a job or watch your income drop hard, and you can usually request an interim recertification to lower your share right away instead of waiting for your annual date. [6] Some PHAs move faster than others. Call and ask. Don't assume you have to wait.
For how this fits the wider program rules, our rental assistance overview covers the annual recertification process in more detail.
What is the minimum rent and does it apply to you?
HUD lets PHAs set a minimum rent of up to $50 a month under 24 CFR 982.505(d). [7] Some PHAs charge less. Some charge the full $50. This is the floor: even if your 30% calculation comes out to zero, you may still owe the minimum.
But HUD requires PHAs to grant a hardship exemption when paying the minimum rent creates a financial hardship. The statutory hardship categories include: the family has lost eligibility for, or is awaiting a determination on, a federal, state, or local assistance program; the family would be evicted because of the minimum rent; family income has dropped because of changed circumstances, including job loss; a death has occurred in the family; or other situations the PHA decides warrant it. [7]
If you're in a hardship, request the exemption in writing. The housing authority has to grant it temporarily while it reviews your case. You should not be evicted for non-payment of the minimum rent while that request is pending.
Minimum rent exemptions are rarely advertised. Ask.
How is your share calculated differently for project-based vs. tenant-based vouchers?
The 30%-of-adjusted-income formula runs the same for both tenant-based Housing Choice Vouchers (the portable kind) and project-based vouchers (tied to a specific unit). The structural differences are what you need to know. [8]
With a tenant-based voucher, you can move anywhere that accepts vouchers within the program rules, and the payment standard travels with the voucher size your PHA authorized. Port to a new city and the receiving PHA's payment standard applies, which can raise or lower what you pay if rent levels differ a lot.
With project-based vouchers, the subsidy sticks to the unit. The calculation is identical (30% of adjusted income), but you can't take the subsidy with you when you move. You'd have to apply for a tenant-based voucher separately or find another project-based unit.
Public housing (government-owned units) also uses a 30%-of-adjusted-income formula, but the mechanics differ because there's no HAP going to a private landlord. The housing authority owns the unit and sets rent directly. [8]
For how these programs split apart, our section 8 article breaks down the full set of voucher types.
Can the landlord charge more than the payment standard?
Yes, and it's one of the most common sources of confusion for tenants and landlords both.
A landlord can set rent above the payment standard. The housing authority won't reject the tenancy for that reason alone. What changes is who pays the difference: you do, out of pocket, on top of your standard 30% share. At initial lease-up, your total share (gap included) can't exceed 40% of adjusted monthly income. After that first lease, later rent increases aren't capped the same way, so your effective percentage can creep up. [1]
Some PHAs actively counsel voucher holders against units above the payment standard, because that gap compounds when the landlord raises rent every year. A $150 gap in year one becomes $250 in year two if rent climbs and the payment standard doesn't keep pace.
For landlords deciding whether to list at or above the payment standard, the plain reality is that fewer voucher holders can absorb a big gap payment, so pricing at or near the payment standard usually fills the unit faster. section 8 houses for rent has more on how landlords handle this.
HUD's rent reasonableness requirement adds another layer. Even when the payment standard allows a certain subsidy, the housing authority has to independently confirm the unit's rent is reasonable next to unassisted units of similar size, location, and condition in the same market. [9] Rent above comparable market rate can be rejected on reasonableness grounds no matter what the payment standard says.
How does a housing authority verify income and calculate adjustments?
Housing authorities don't take your word for income. They run a federally required verification process built around EIV, the Enterprise Income Verification system. EIV is a HUD-operated database that pulls wage and benefit data from SSA and HHS records for every household member. [6]
EIV data gets matched against what you reported. Any gap triggers a request for third-party documentation: pay stubs, employer letters, Social Security award letters, tax returns. If EIV turns up income the tenant didn't disclose, the PHA calculates repayment of the overpaid HAP, and that becomes a debt the tenant owes.
Deduction verification is document-heavy. Medical deduction claims need receipts or insurance EOBs. Child care deductions need a letter from the provider showing cost and necessity. Disability expense deductions need documentation that the expense is work-enabling.
The HUD Occupancy Handbook 4350.3 (Chapter 5) is the authoritative guide to what verification PHAs must collect and how to settle conflicts. [3] It's public and readable. If you want to see exactly how a housing authority should be figuring your income, reading Chapter 5 is the single most useful thing you can do.
VoucherReady's free income worksheet tool can help you estimate your adjusted income before your recertification appointment, so you don't walk in cold.
What happens if the housing authority calculates your share wrong?
Errors happen. If you think the housing authority miscalculated your income, deductions, or TTP, you have the right to an informal hearing. That right is guaranteed under 24 CFR 982.555. [10]
You can request an informal hearing to dispute a determination of your income, denial of a deduction you believe you qualify for, or a termination or reduction in assistance. The request usually has to come within a set number of days of the adverse decision, often 10 to 30 days, and the exact deadline is in your voucher paperwork.
At the hearing, bring documentation: bank statements, pay stubs, medical receipts, anything that backs your position. You can bring a representative, including a lawyer or housing advocate, at no cost to the PHA.
If the hearing officer rules against you, you can pursue a grievance through HUD's complaint channels or, in some cases, through state or federal court. The hearing itself isn't court, but it's a formal proceeding and the outcome is binding.
Don't skip the informal hearing even if it intimidates you. Many calculation errors get fixed right there without escalation. Housing authorities make mistakes on deductions, utility allowances, and income averaging more often than they'd admit.
How does porting your voucher affect your rent calculation?
Port a Housing Choice Voucher to a new jurisdiction and the receiving PHA takes over administering it, applying its own payment standard and utility allowance schedule to the new unit. [11]
Your adjusted income still gets figured the same way (30% of adjusted monthly income), but the payment standard ceiling shifts to the receiving PHA's number. Move from a low-cost market to a high-cost one and the receiving PHA's payment standard may be higher, so the subsidy covers more. Move the other direction and you could face a larger gap between the rent you want and what the subsidy covers.
The receiving PHA will run a fresh income certification if your last one is more than 60 days old. They'll also apply their own utility allowance schedule, which may run higher or lower than your original PHA's.
Porting can improve or worsen your affordability depending on the markets involved. Always request the payment standards and utility allowance schedule from the receiving PHA before you commit to a unit in that jurisdiction. Our hud housing overview covers the porting process in more detail.
Frequently asked questions
What percentage of my income do I pay for Section 8 rent?
The standard is 30% of your adjusted monthly income, not your gross income. Adjusted income is gross income minus HUD-approved deductions for dependents, elderly or disabled status, medical expenses, and child or disability care costs. Your utility allowance is then subtracted from that 30% figure to get your actual payment to the landlord. Some households end up paying less than 30% of gross income once deductions and allowances apply.
What is the Total Tenant Payment (TTP)?
TTP is the greater of: 30% of adjusted monthly income, 10% of gross monthly income, the welfare rent (if applicable in your state), or the PHA's minimum rent (up to $50). For most working or Social Security households, 30% of adjusted monthly income is the controlling number. TTP is the starting point for every rent calculation; the utility allowance and any gap above the payment standard are applied after.
What deductions can reduce my rent payment under Section 8?
HUD allows deductions of $480 per dependent per year, a $400 annual deduction for elderly or disabled households, unreimbursed medical expenses above 3% of annual income (elderly/disabled households only), reasonable child care costs up to the lower-earning adult's income, and disability assistance expenses that enable a disabled adult to work. Each deduction requires documentation. The medical deduction alone can drop your share a lot if your household has high out-of-pocket health costs.
How does the payment standard affect how much I pay?
The payment standard is the maximum HAP the housing authority will pay for your unit size in your market. If rent equals the payment standard, you pay your 30% share and the housing authority covers the rest. If rent exceeds the payment standard, you pay your 30% share plus the entire gap. At initial lease-up, your combined share cannot exceed 40% of adjusted monthly income, but that cap doesn't stop your share from rising after later rent increases.
What happens to my rent share if my income goes up?
Your rent share rises proportionally. Most PHAs require you to report income increases above a threshold (often $200/month or any new income source) between annual recertifications. Fail to report and then get caught at your next annual review, and you'll owe back rent for the months you paid too little. If you expect a raise, contact your housing authority proactively rather than waiting; the liability for underreporting can be significant.
Can I get my Section 8 rent recalculated if my income drops?
Yes. You can request an interim recertification any time your income drops materially. Most PHAs process these, though timelines run from a few weeks to a couple of months. An interim recertification lowers your adjusted income, which lowers your TTP, which lowers your rent share. You don't have to wait for your annual review. Submit the request in writing and include documentation of the income change.
What is a utility allowance and how does it lower my rent?
A utility allowance is a dollar amount the PHA sets to represent typical utility costs for a unit of your size and type. It's subtracted from your TTP before you pay the landlord. If your utility allowance is larger than your TTP, you receive the difference as a monthly utility reimbursement payment. PHAs update allowance schedules at least annually. Always ask for the current schedule and verify your unit type (apartment, house) is matched correctly.
What is the minimum rent for Section 8 housing?
HUD allows PHAs to charge a minimum rent of up to $50 per month, even if your 30% calculation comes out lower. Some PHAs charge less. If paying the minimum creates a financial hardship, you can request an exemption in writing. The housing authority must grant a temporary exemption while reviewing your case. Hardship categories include lost income, pending assistance eligibility determination, and imminent eviction risk.
How does HUD's rent reasonableness requirement affect the rent calculation?
Before approving a unit, the housing authority must verify the landlord's rent is reasonable next to unassisted similar units in the same market. Even if the payment standard would theoretically support a higher subsidy, rent above what comparable unassisted units charge can be rejected. Rent reasonableness is judged on size, location, condition, amenities, and age. If the landlord refuses to lower rent to a reasonable level, you cannot lease that unit with a voucher.
What rights do I have if the housing authority calculates my rent share incorrectly?
You have the right to an informal hearing under 24 CFR 982.555. You must request it within the deadline stated in your adverse action notice, typically 10 to 30 days. Bring all documentation supporting your position: pay stubs, medical receipts, bank statements. You may bring a representative. If the hearing officer rules against you, you can file a complaint with HUD. Many errors, especially on deductions and utility allowances, get corrected at the informal hearing stage.
Does moving to a different city change how my rent is calculated?
The 30%-of-adjusted-income formula stays the same, but the payment standard and utility allowance change to the receiving PHA's numbers. A higher-cost market usually means a higher payment standard, which can cover more of the rent. A lower-cost market may mean a lower payment standard. Always request the receiving PHA's payment standard schedule and utility allowances before choosing a unit in a new jurisdiction; your affordability can shift a lot.
How often does the housing authority recalculate my rent portion?
At minimum, once a year at your annual recertification. Between recertifications, most PHAs require you to report significant income changes, and you can request an interim recertification if income drops. Payment standard changes, which affect the housing authority's share, typically take effect at your next annual recertification or lease renewal, not mid-lease. Your landlord's rent increases are also subject to recalculation at lease renewal with proper notice.
What income is excluded from the Section 8 rent calculation?
HUD's exclusion list under 24 CFR 5.609 includes income of a live-in aide, earnings of household members under 18, certain adoption assistance payments, lump-sum inheritances, student financial aid, income from the employment of a full-time student (above $480), and certain other irregular or one-time receipts. If you have an unusual income source, ask your PHA in writing whether it's included or excluded before your recertification.
Sources
- HUD, 24 CFR Part 982 (Code of Federal Regulations), Sections 514 and 505: Family rent share formula, 30% of adjusted monthly income, 40% cap at initial lease-up, payment standard as HAP ceiling
- HUD, 24 CFR Part 5 Subpart F, Section 609 (Annual Income definition): Definition of annual income for HUD programs, inclusions and exclusions
- HUD Occupancy Handbook 4350.3, Chapter 5 (Income and Asset Verification), via HUDCLIPS: HUD deduction amounts: $480 per dependent, $400 elderly/disabled, medical expense threshold, verification requirements
- HUD Office of Policy Development and Research, Fair Market Rents: Payment standards must be set between 90% and 110% of HUD Fair Market Rents; FMRs updated annually
- HUD, 24 CFR Part 982 Section 517 (Utility Allowances): Utility allowance subtracted from TTP; if allowance exceeds TTP, tenant receives utility reimbursement; PHA must update schedules at least annually
- HUD, Public and Indian Housing, Enterprise Income Verification (EIV) System: PHAs required to use EIV to verify income; discrepancies trigger documentation requests; overpaid HAP becomes tenant debt
- HUD, 24 CFR Part 982 Section 505(d) (Minimum Rent and Hardship Exemptions): PHAs may set minimum rent up to $50/month; hardship exemptions must be granted pending review
- HUD, Housing Choice Voucher Program (Public and Indian Housing): Comparison of tenant-based vs. project-based vouchers and public housing rent calculation methods
- HUD, 24 CFR Part 982 Section 507 (Rent to Owner: Reasonable Rent): Housing authorities must verify rent is reasonable compared to unassisted similar units before approving subsidy
- HUD, 24 CFR Part 982 Section 555 (Informal Hearing Procedures): Tenants have the right to an informal hearing to dispute income determinations, deduction denials, and terminations
- HUD, 24 CFR Part 982 Subpart H, Section 353 (Portability): Receiving PHA applies its own payment standard and utility allowance when a voucher is ported; income recertification required if over 60 days old