How do you calculate fair market rent (FMR): a step-by-step guide

Last updated 2026-07-10

What is Fair Market Rent and why does it matter for vouchers?

Fair Market Rent is the dollar figure HUD publishes each year to say what a modest rental unit costs in a given area. It represents the 40th percentile of gross rents (rent plus tenant-paid utilities) for standard-quality units occupied by recent movers. ^[1]

That 40th-percentile target is a deliberate choice. It gives voucher holders access to roughly 40 percent of the private rental market, more than just the cheapest bottom-tier units. The figure covers every utility the tenant pays directly, so it's a gross rent number, higher than the contract rent a landlord charges.

For tenants, FMR sets the ceiling on what your Housing Authority will subsidize. For landlords, it tells you fast whether accepting a voucher is worth your time. If your asking rent sits well above the local FMR, the voucher probably won't cover enough to make the math work unless the tenant pays a large share out of pocket. Our guide on how the payment standard sets your rent ceiling breaks down what the tenant actually pays.

How does HUD actually calculate Fair Market Rent?

HUD builds the number in three steps, each grounded in public Census and survey data. The agency publishes the full methodology in the Federal Register every year. ^[2]

Step 1: Pull the base rent distribution from ACS data. HUD starts with gross rent data from the Census Bureau's American Community Survey. The ACS samples rental households continuously, so HUD can build a distribution of what people actually pay. For areas too small for reliable 1-year estimates, HUD uses the 5-year ACS dataset. ^[3]

Step 2: Filter to recent movers only. Most of the ACS dataset isn't relevant. Long-term tenants often pay below-market rents because their landlord hasn't raised the rent in years. HUD filters the data down to units where the household moved in during the past two years. That "recent mover" adjustment pushes the estimate toward what a new renter would actually face today. ^[11]

Step 3: Inflate to the fiscal year being estimated. The ACS data is always a year or two old by the time HUD runs its numbers. HUD applies a Consumer Price Index rent index from the Bureau of Labor Statistics to trend the survey data forward to the fiscal year that starts the following October 1. ^[10] It also uses local Consumer Expenditure Survey data where available to sharpen bedroom-size adjustments.

The final output is the gross rent at the 40th percentile of that adjusted, inflation-trended distribution, broken out by bedroom count from efficiency through 4-bedroom. HUD publishes it every year, usually in August or September, for use starting October 1. ^[1]

What geographic areas do FMR calculations cover?

HUD publishes FMRs for every metropolitan area and every non-metropolitan county in the country. It calls these Fair Market Rent Areas, and there are roughly 2,600 of them nationwide. ^[1]

Metro areas share one data pool across the whole metro. So the FMR for the New York-Newark-Jersey City metro is a single figure, even though rents swing wildly block to block inside it. Each non-metro county gets its own number.

Some PHAs use Small Area FMRs (SAFMRs), which pull ZIP-code-level data instead of metro-wide averages. SAFMRs are mandatory in certain large metros and optional elsewhere. They matter in high-cost cities. A metro-wide FMR might read $1,800 for a 2-bedroom while a SAFMR in a suburban ZIP in that same metro hits $2,400. HUD keeps a searchable database at huduser.gov where you can look up both metro and small-area figures. ^[4]

If you're a landlord or tenant trying to figure out which FMR applies, start with the PHA's jurisdiction, then confirm whether they use metro-wide or small-area FMRs.

How do Payment Standards relate to FMR?

FMR and Payment Standard are not the same thing, even though people swap the terms. That confusion costs tenants money.

The Payment Standard is the figure your local PHA actually uses to calculate the subsidy. Under 24 CFR 982.503, PHAs set their Payment Standards anywhere from 90% to 110% of the published FMR with no HUD approval needed. ^[5] They can go above 110% with HUD's written sign-off, and some high-cost PHAs have.

Here's what that spread looks like in practice:

Bedroom Size	FMR (example metro)	PHA at 90% FMR	PHA at 110% FMR
Efficiency	$1,200	$1,080	$1,320
1-BR	$1,500	$1,350	$1,650
2-BR	$1,900	$1,710	$2,090
3-BR	$2,400	$2,160	$2,640
4-BR	$2,700	$2,430	$2,970

Your share of rent is calculated against the Payment Standard, not the FMR directly. Sign a lease above the Payment Standard and you pay the full difference above it out of pocket, on top of your normal 30% income contribution. PHAs have to give you their current Payment Standards in writing when you receive your voucher. ^[5]

For landlords weighing whether to accept vouchers, the Payment Standard is the number you actually negotiate around. Our guide on landlord PHA section 8 new rules covers how recent policy changes affect what you can charge.

How is gross rent calculated for FMR purposes?

Gross rent, in HUD's definition, is contract rent (the rent on the lease) plus the cost of any utilities the tenant pays directly, telephone excluded. ^[1] This matters because two units at the same contract rent can carry very different gross rents depending on what utilities the landlord covers.

When a PHA checks whether a unit's rent is reasonable under the voucher program, it compares gross rent to the Payment Standard. If the landlord pays all utilities, gross rent equals contract rent. If the tenant pays gas and electric, the PHA adds a Utility Allowance to the contract rent to get the gross rent figure.

Utility Allowances are PHA-published figures too, updated periodically, and they vary by unit type and local utility costs. Getting the utility allowance wrong is one of the most common mistakes tenants and landlords make the first time they run voucher numbers.

How to calculate Fair Market Rent for a specific unit, step by step

Here's what you'd actually do to find the effective subsidy cap for a real unit.

Step 1: Identify the voucher holder's bedroom size. Vouchers are issued by bedroom size based on household composition. A family of four typically gets a 3-bedroom voucher. The FMR that applies is the one for the voucher bedroom size, not the actual unit size (there are exceptions for under-occupancy).

Step 2: Find the current FMR for the area. Go to HUD's Fair Market Rents page at huduser.gov. ^[4] Pick the fiscal year, then your state and county or metro. Download the table or use the online query tool. Write down the gross FMR for the relevant bedroom size.

Step 3: Find the PHA's Payment Standard. Call the PHA or check its website. This runs 90 to 110% of FMR, or higher with a HUD-approved exception. If the PHA sets its standard at 100% of FMR, the Payment Standard equals the FMR you just looked up.

Step 4: Determine gross rent for the unit. Add the lease rent to the applicable Utility Allowance. If the landlord pays all utilities, gross rent equals the asking rent.

Step 5: Compare gross rent to Payment Standard. If gross rent lands at or below the Payment Standard, the PHA can approve it (subject also to a rent reasonableness test against similar unassisted units nearby). If it's above, the tenant pays the difference. And here's the catch: in the first year of a new lease, a tenant generally can't pay more than 40% of adjusted monthly income toward rent if that pushes total housing cost above the Payment Standard. ^[5]

That last rule surprises people. A high but not outrageous rent can still work, just with a bigger tenant share.

How can landlords use FMR to decide whether to accept a voucher?

Run the numbers before a tenant finds you, not after. Here's the practical logic.

Look up the FMR for your county and the bedroom size matching your unit. Find out which PHA covers your area and what its current Payment Standard is. If your asking rent (plus the applicable Utility Allowance for any utilities you don't cover) sits at or below that Payment Standard, you're in the zone, and the PHA is likely to approve the rent.

If your rent runs above the Payment Standard by more than 10 to 15%, the deal only works if the tenant can absorb that gap within the income-share rules. Many can't, or won't.

Rent reasonableness is a separate check. The PHA compares your unit's rent to 3 to 5 comparable unassisted rentals in your neighborhood. ^[6] Even a rent below the Payment Standard has to clear that comparison. In hot rental markets this rarely trips anyone up. In softer markets where you're pricing at the top of your area, it can.

For the full picture of the PHA process from a landlord's side, including the inspection requirements that run parallel to rent approval, the section 8 inspection requirements for landlords guide walks through each stage.

VoucherReady's landlord kit (at voucherready.com) includes a rent calculation worksheet that pulls current FMR data, so you can run this comparison in a few minutes without hunting through HUD spreadsheets.

What happens when FMR changes and how often does it change?

HUD updates FMRs every federal fiscal year, which runs October 1 through September 30. The new figures land in the Federal Register, usually in late August, which gives PHAs and participants about 30 days to adjust. ^[2]

On active leases, a mid-lease FMR change generally doesn't touch the tenant's rent until the annual reexamination or lease renewal, depending on the PHA's policies. If the Payment Standard goes up after you sign, your PHA might not apply it until your next annual review. If it goes down, 24 CFR 982.505(c) requires PHAs to give tenants at least one year's notice before applying a reduced Payment Standard. ^[5]

Year-over-year FMR changes have been sharp in some markets since 2021. HUD's fiscal year 2024 FMRs showed a national average increase of roughly 10% over FY2023, with some metros topping 20%. ^[7] In FY2025, increases eased in most metro areas as broader rent growth slowed. Landlords pricing at FMR today should recheck every October. What cleared Payment Standard approval last year might sit below or above it now.

HUD also publishes Revised FMRs mid-year in some jurisdictions when local data clearly diverges from the published estimate. These revisions are uncommon but worth watching in fast-moving markets. If you're timing a move around these updates, our guide on moving with a voucher to a new area covers how the receiving PHA's Payment Standard applies.

What is the Small Area FMR and how is it calculated differently?

Small Area FMRs use ZIP-code-level rent data instead of metro-wide averages. HUD turned on the SAFMR rule for certain designated metros in 2018, and more PHAs have opted in since. As of FY2023, HUD designated mandatory SAFMRs for 24 metro areas based on high voucher concentration and high rent variation within the metro. ^[8]

The methodology mirrors standard FMRs but applies to a much smaller geography. HUD starts with ZIP-code-level data from its own rental database and ACS data, then runs the same recency and CPI adjustments. Because ZIP-level samples are small, HUD uses statistical smoothing to keep the figures from swinging wildly year to year.

Why does this matter? In a metro where the standard FMR is $1,800 for a 2-bedroom, a SAFMR might cap the subsidy at $1,200 in a lower-cost ZIP and $2,600 in a higher-cost ZIP inside the same metro. That gives voucher holders real access to higher-opportunity neighborhoods instead of being priced out by a metro average that ignores where they actually want to live.

To check whether your PHA uses SAFMRs, ask them directly or look up the metro on HUD's SAFMR tool at huduser.gov.

Can you challenge or appeal an FMR that seems wrong?

Yes, and it happens more than most people realize. HUD's annual FMR notice includes a comment period and a formal process for local governments and PHAs to request a re-survey or data correction. Individuals can comment too, though PHA and local government challenges carry more weight. ^[2]

The common grounds for a challenge: local rent data that diverges sharply from the ACS numbers (this hits fast-moving markets hardest), errors in how HUD assigned a county to a metro area, or evidence that the recent-mover filter missed a big chunk of the market.

If a PHA believes its local rents run well above the published FMR, it can apply to HUD for an exception Payment Standard above 110% of FMR. That's separate from the comment process, and it's the practical tool most PHAs reach for when they think FMR is too low. PHAs with approved exceptions in high-cost areas like San Francisco, Boston, and Seattle run payment standards at 120 to 130% of FMR or higher. ^[9]

As a tenant, you can't directly appeal the FMR. What you can do is ask your PHA whether they've applied for or received an exception payment standard, and whether the unit you want might qualify for a rent reasonableness finding above the standard Payment Standard.

How does FMR affect the rent reasonableness determination?

Rent reasonableness is a separate HUD requirement under 24 CFR 982.507 that runs alongside FMR. The PHA has to confirm that the rent for a voucher unit is reasonable next to rents for similar unassisted units in the same market, whether the rent is under or over the Payment Standard. ^[6]

Think of it this way. FMR sets a ceiling on what the voucher will cover. Rent reasonableness sets a ceiling on what the landlord can charge relative to the actual local market. Both have to check out.

Rent reasonableness comparisons weigh unit size, type, location, amenities, utilities included, and the age and condition of the unit. PHAs often pull comps from third-party rent databases like CoStar or RentData. Some run their own surveys.

For landlords, this means your rent has to hold up against actual nearby listings, not merely fall under the Payment Standard. Price significantly above comparable unassisted rentals and the PHA can reject the rent even when it's technically under the Payment Standard. Flip side: priced below the Payment Standard but at or above market, rent reasonableness rarely gets in the way.

Where can you look up the current FMR for your area?

HUD's official data lives at the HUD User Fair Market Rents page (huduser.gov). ^[4] The query tool lets you pick fiscal year, state, and geography and returns FMR by bedroom size in about 30 seconds. You can also download national summary spreadsheets to compare across areas.

FMR data shows up on most PHA websites too, usually in the landlord or voucher program sections. When PHA-published figures differ from HUD's table, the PHA is usually showing its Payment Standard (which differs from FMR by the percentage they've set), not a different FMR. Confirm which one you're reading.

A few things to watch for in the HUD tables. The figures are gross rent, utilities included. If you're comparing to a landlord's asking rent that doesn't include utilities, add the utility allowance separately. Confirm the fiscal year too, because PHAs don't always update their published tables the moment October 1 arrives.

If you're doing this for a move and want to understand how your voucher bedroom size got set, ask your PHA for your current voucher's bedroom-size determination in writing. That's the bedroom-size FMR column you should be reading. Our voucher bedroom size explainer covers how households get sized.

Frequently asked questions

Is Fair Market Rent the same as the Payment Standard my PHA uses?

No. FMR is HUD's published figure. Your PHA's Payment Standard is set between 90% and 110% of FMR under 24 CFR 982.503, and with HUD approval it can go higher. The Payment Standard is what actually determines your subsidy. Always ask your PHA for its current Payment Standard by bedroom size, because it can differ a lot from the raw FMR number on HUD's website.

How often does HUD update Fair Market Rents?

Every federal fiscal year, starting October 1. HUD publishes the new FMRs in the Federal Register, typically in August or September. Mid-year revisions do happen for some jurisdictions when local data diverges sharply from the published figures, but they're uncommon. Check the HUD User website each fall to confirm you're using the current year's figures.

What does the 40th percentile mean for FMR?

The 40th percentile means FMR sits at the point where 40% of recent-mover rentals in the area are at or below that rent. HUD targets it so voucher holders can reach a meaningful share of the private market, more than the cheapest units. In very high-cost metros, Congress has allowed HUD to use higher percentiles (up to the 50th) in specific circumstances.

Can I rent a unit that costs more than the local FMR with a voucher?

Yes, but you pay the difference out of pocket. If the gross rent exceeds the PHA's Payment Standard, you cover 100% of the gap above it, on top of your normal 30% income contribution. HUD rules also cap your initial rent burden: in the first year of a new lease, you generally can't pay more than 40% of adjusted monthly income toward rent. Units well above FMR can turn unaffordable fast.

Does FMR include utilities?

Yes. HUD defines FMR as gross rent, meaning contract rent plus tenant-paid utilities (telephone excluded). When a landlord pays all utilities, the FMR comparison is simply against the asking rent. When the tenant pays utilities, the PHA adds a Utility Allowance to contract rent to estimate gross rent. Getting the utility split right decides whether the rent falls under the Payment Standard.

How does the Small Area FMR differ from the standard metro FMR?

Standard FMRs average rent data across an entire metro. Small Area FMRs use ZIP-code-level data, so the cap varies by neighborhood within the metro. HUD mandates SAFMRs in 24 metros as of FY2023. In cities with high rent variation, SAFMRs run substantially higher in affluent ZIPs and lower in cheaper ZIPs than the single metro FMR. Check whether your PHA operates under SAFMR rules.

How do landlords check if their rent is within FMR limits?

Look up the current FMR at huduser.gov for your county and the relevant bedroom size, then ask the PHA for its Payment Standard percentage. If your asking rent plus any tenant-paid utility allowance sits at or below the Payment Standard, you're in range for approval. You'll still need to pass a rent reasonableness check against comparable unassisted units nearby, which the PHA runs separately.

What data does HUD use to calculate FMR?

HUD relies on the Census Bureau's American Community Survey, filtered to households who moved in the past two years (the recent-mover adjustment). It then trends that data forward using the Bureau of Labor Statistics CPI rent index to reflect the upcoming fiscal year. For smaller areas where 1-year samples are too thin to trust, HUD uses 5-year ACS data instead.

Can a PHA set its Payment Standard above 110% of FMR?

Yes, with HUD's written approval. Under 24 CFR 982.503(c), PHAs in high-cost markets can request exception payment standards above 110% of FMR. Several large PHAs, including those in San Francisco and Boston, run approved exceptions. PHAs can also set different payment standards for different parts of their jurisdiction, particularly under Small Area FMR rules.

Does FMR change during the year if rents rise fast?

Rarely. HUD publishes FMR once a year for October 1. Mid-year revisions are possible but uncommon and require formal publication in the Federal Register. PHAs can apply for exception payment standards if they believe the published FMR is too low for their market, but the base FMR figure typically holds for the full 12 months of the fiscal year.

If FMR goes down, does my voucher subsidy automatically drop?

Not immediately. Under 24 CFR 982.505(c), if a PHA lowers its Payment Standard, tenants in current leases get at least 12 months before the lower standard applies to them. Your subsidy is recalculated at your next annual reexamination after that notice period. If you move to a new unit or renew your lease, the new Payment Standard applies from that point forward.

How is FMR used in the rent reasonableness determination?

They're related but separate. FMR (through the Payment Standard) caps what the subsidy covers. Rent reasonableness, required under 24 CFR 982.507, caps what the landlord can charge relative to comparable unassisted units nearby. Both tests have to pass. A rent can sit below the Payment Standard and still fail rent reasonableness if it's above what similar market-rate units charge in that neighborhood.

Where do I find FMR data for my city or county?

HUD publishes FMRs at huduser.gov (search 'Fair Market Rents' on that site). The query tool lets you pick your state and geography and returns gross rents by bedroom size for the current fiscal year. You can also download national summary spreadsheets. Your local PHA's website usually carries the same figures plus its Payment Standard percentage applied to those FMRs.

Sources

1. HUD, Fair Market Rents: Overview and Methodology: FMR represents the 40th percentile of gross rents for standard-quality units occupied by recent movers in a given geographic area
2. Federal Register, HUD FY2024 Fair Market Rents Notice: HUD publishes FMRs annually in the Federal Register, typically in August or September, with a comment and challenge process included
3. U.S. Census Bureau, American Community Survey: HUD uses ACS gross rent data, including 5-year estimates for smaller geographies, as the base for FMR calculations
4. HUD User, Fair Market Rents Data Query Tool: HUD provides a public query tool at huduser.gov for looking up current FMRs by state, metro area, and county
5. Code of Federal Regulations, 24 CFR Part 982, Section 8 Tenant-Based Assistance: Under 24 CFR 982.503, PHAs must set Payment Standards between 90% and 110% of FMR without HUD approval; 24 CFR 982.505(c) requires at least 12 months notice before a reduced Payment Standard applies to a current tenant
6. Code of Federal Regulations, 24 CFR 982.507, Rent Reasonableness: PHAs must determine that the rent charged for a voucher unit is reasonable compared to rents for similar unassisted units in the same market area
7. HUD, FY2024 Fair Market Rents: Summary Statistics: HUD's fiscal year 2024 FMRs showed a national average increase of approximately 10% from FY2023, with some metros exceeding 20%
8. HUD, Small Area Fair Market Rents: Designated Metros: As of FY2023, HUD designated mandatory Small Area FMRs for 24 metro areas based on high voucher concentration and high intra-metro rent variation
9. HUD, Public and Indian Housing program office: PHAs in high-cost markets can receive HUD approval for exception payment standards above 110% of FMR under 24 CFR 982.503(c)
10. Bureau of Labor Statistics, Consumer Price Index: HUD uses the BLS CPI rent index to trend ACS survey data forward to the upcoming fiscal year when calculating FMRs
11. HUD, Methodology for Calculating FY2024 Fair Market Rents: HUD filters ACS data to units where the household moved in during the past two years to reflect current market rents rather than long-term tenant rates