Home · Resource Center · How to Calculate Rent Growth Rate
Rent growth rate sounds like a simple percentage. It is not, because the source you pull it from changes the answer. A national CPI headline, a Census survey, and a local comp set can all disagree in the same quarter, and each one is measuring something different.
By RentalAnalytics Editorial Team · Last updated August 12, 2026
Rent growth rate is the percentage change in rent for the same unit, or a matched pool of comparable units, between two points in time. The formula is (current rent minus prior rent) divided by prior rent, multiplied by 100. The word that matters most in that sentence is "same": the comparison only means something if the unit, or the pool of units, is held constant.
This is where most informal rent growth numbers break down. Comparing this year's average asking rent across all current listings to last year's average asking rent across a different set of listings is not a growth rate. It is a comparison of two different samples that may differ in size, condition, and location, and the result can move for reasons that have nothing to do with actual price appreciation.
Three types of rent data exist, and they measure three different populations. A repeat-rent index like BLS CPI Shelter tracks the same sampled units over time, including tenants who have not moved in years. A household survey like the Census American Community Survey asks every responding renter what they currently pay, blending new leases with old ones. A market or listing index tracks only units currently advertised for rent, which skews toward turnover and new construction.
None of these is wrong. They answer different questions. CPI Shelter answers "how is the cost of housing changing for the average renter, including those who have not moved," while a listing-based index answers "what would a new tenant pay today." Landlords underwriting a deal need the second answer far more than the first.
The BLS Consumer Price Index Shelter index rose 3.3% over the 12 months ending June 2026, the most recent reading at the time of writing.[1] That single national figure hides meaningful regional spread. In the New York-Newark-Jersey City area, shelter prices were up 4.3% year over year, with owners' equivalent rent up 4.5% and rent of primary residence up 4.2%.[2] In the South region, shelter was up closer to 2.9%, with owners' equivalent rent up 2.8%.[3]
CPI Shelter also lags the market more than most landlords assume. NBER research on the relationship between CPI shelter and market rents found that landlords pass through only about 21% of accumulated market rent increases to renewing tenants, largely because roughly 60% of rentals sit on 12-month leases that block mid-term repricing.[6] During 2021-2022, market rents on new leases spiked to nearly 20% annualized growth in some data series, while CPI shelter did not peak until 2022-2023 and topped out closer to 8%. If you are pricing a lease signed today, CPI Shelter is a trend indicator, not a direct estimate of what a new tenant will pay.
The Census Bureau's American Community Survey gives a longer, slower-moving view. Comparing the 2020-2024 five-year estimates to the 2015-2019 five-year estimates, median gross rent nationally rose from $1,309 to $1,413, an increase of about $100 a month over the five-year window, with rent rising in 626 counties and falling in 330.[4] On a shorter horizon, an analysis of the 2024 one-year ACS data by the Center on Budget and Policy Priorities found median rent rose 5.8% in nominal terms from 2023 to 2024, while median renter household income rose 5.3% over the same period, meaning rent again slightly outpaced income.[5]
Census data is useful for the slow-moving structural story of rent burden versus income. It is a poor substitute for a current market read, since ACS figures look backward at survey data that can be a year or more old by publication.
Use each data source for what it does well instead of picking one and ignoring the rest. Anchor the current rent level with a HUD Fair Market Rent figure or a set of local comparable listings, the same approach covered in how to estimate rent the right way and reading HUD Fair Market Rent data. Then use CPI Shelter, ideally the regional or metro-area release rather than the national number, as the near-term trend line rather than the level.
Because CPI Shelter understates what new tenants actually pay, treat it as a conservative floor for a growth assumption, not a ceiling. If local comps show new-lease rents running well ahead of the regional CPI Shelter figure, that gap tells you how much repricing is still working through the CPI's repeat sample, and it is a reason to stay cautious about assuming the gap closes quickly.
Build at least two growth scenarios rather than one point estimate: a base case near the blended local and regional trend, and a downside case closer to the national CPI Shelter figure. Four steps get you there.
The most common mistake is comparing unmatched samples: this year's average asking rent for one set of listings against last year's average for a different set, then calling the difference a growth rate. A close second is projecting future rent growth off comps set during a documented boom year, which overstates what a deal can realistically support once the market normalizes. A third is applying the national CPI Shelter number to a specific submarket, when the regional or metro breakout can differ from the national figure by a percentage point or more.
There is no universal target because it depends on the metro. National CPI shelter growth has run around 3.3% for the 12 months ending June 2026, so a market tracking near that figure is in line with the national trend. A market running well above or below that number needs a local explanation, not just a national comparison.
No. CPI rent and CPI shelter measure a repeat sample that includes long-tenured renters whose leases have not turned over. NBER research finds landlords pass through only about 21% of accumulated market rent gains at renewal, so CPI understates what a new tenant signing today actually pays.
HUD publishes Fair Market Rents annually for every metro and county, ahead of each new federal fiscal year. Because the underlying survey data has a lag, the published figure reflects market conditions from roughly 12 to 18 months earlier and should be aged forward with a CPI shelter adjustment.
CPI shelter is the broader category and includes owners' equivalent rent, rent of primary residence, and lodging away from home. Rent of primary residence is the narrower renter-only component. Shelter is the number most often quoted in inflation headlines because it carries the largest weight in the overall CPI basket.
Start with BLS regional CPI news releases, which break shelter and rent out by metro area and region, and HUD's Fair Market Rent dataset for a metro-level rent anchor. Both are free and public. The RentalAnalytics rent growth tracker blends these with a national apartment index into one metro view.
No. National averages mask large metro-level spreads, for example a roughly 1.4 percentage point gap between the New York and South region shelter figures in the June 2026 CPI report. Pull the local trend and haircut it if it was set during a boom year before using it in underwriting.
More on RentalAnalytics → all articles · all tools · city reports