Is there a national limit on rent increases in the United States?

No. There is no federal cap and no national rent index. Landlord and tenant law is state law, and most states set no ceiling on the amount at all, regulating the notice period instead of the figure.

Which states cap rent increases?

California, Oregon and Washington cap the yearly rise by a formula of a fixed percentage plus a regional CPI, to a statutory maximum. The District of Columbia caps stabilised units the same way. New York sets the figure for rent stabilised units by board vote. Every other state leaves the amount to the lease.

How do I calculate a CPI based rent increase?

Take the fixed percentage the statute sets, add the regional consumer price index your state publishes, and cap the result at the statutory maximum. The CPI is regional rather than a national headline rate, and using the wrong one gives a figure that looks right and is not lawful.

My state has no cap. How much can a landlord raise the rent?

On a renewal or a month to month tenancy, generally yes as to the amount but not as to the manner. Every state sets a notice period, and it usually lengthens with the size of the rise and the length of the tenancy.

What about city rent control?

It overrides the state answer for an address inside it. Over a hundred New Jersey municipalities run their own rent control, Maryland caps in two counties, Maine has municipal ordinances, and Minneapolis and St Paul have adopted stabilisation by ballot.

Rent calculators

Rent increase calculator: the laws, state by state.

There is no national rent index in the United States and no federal ceiling. Rent increase laws are state law, and on this one question the states fall into three shapes rather than fifty: a CPI formula cap, a board set figure, or nothing at all beyond what the lease says.

Country

Region or state

Letting law is written below the country here, so the rules differ inside it.

Rent currently paid

Lease start date

It fixes the anniversary, and where an index applies, the starting index.

Revision date

The anniversary you are claiming.

Increase you intend

What the lease or the notice sets. A statutory ceiling brings it down where one applies.

Published CPI

The regional figure this jurisdiction publishes, not a national headline rate.

Rent today

$850.00

Revised rent

$875.50

The difference

+$25.50

$306.00 over a year

The working

$850.00 × (1 + 3,0 %) = $875.50

From 24 Sep 2026 the rent goes from $850.00 to $875.50, +$25.50 a month. There is no rent index here. United States, California caps the yearly rise at 5,0 % plus CPI, never above 10,0 % (Tenant Protection Act 2019 (AB 1482), Cal. Civ. Code § 1947.12), and 3,0 % is what that comes to.

Check before you send

No CPI was supplied, so the ceiling has been taken as 5,0 %, the fixed part of the formula alone. The lawful ceiling is that plus the CPI United States, California publishes, to a maximum of 10,0 %.

What governs in United States, California

Index: Statutory cap: 5% plus CPI, to 10%
Formula: new rent = current rent × (1 + the lower of (5% + CPI) and 10%)
Statutory ceiling: 10 %

Nobody here has read these rules in the law of United States, California yet, so every figure above is a plausible default rather than a confirmed one. Dardaris will not act on an unconfirmed rule on its own, and neither should you: check it in the source before you send anything.

Nothing is stored and nothing is sent. This runs the same calculation engine the product itself runs, in this browser.

Every state, and what it caps

Rent increase limits, state by state.

Five of them cap the yearly rise and the rest do not. A state with a cap has a page of its own; a state without one has this row, because a page saying nothing is a page nobody should land on.

State	What it caps
Alabama	No statewide cap. The lease governs the amount.
Alaska	No statewide cap. The lease governs the amount.
Arizona	No statewide cap. The lease governs the amount.
Arkansas	No statewide cap. The lease governs the amount.
California	5 % plus CPI, to 10 % (Tenant Protection Act 2019 (AB 1482), Cal. Civ. Code § 1947.12)
Colorado	No statewide cap. The lease governs the amount.
Connecticut	No statewide cap. The lease governs the amount.
Delaware	No statewide cap. The lease governs the amount.
District of Columbia	2 % plus CPI, to 10 % (Rental Housing Act, D.C. Code § 42-3502.08)
Florida	No statewide cap. The lease governs the amount.
Georgia	No statewide cap. The lease governs the amount.
Hawaii	No statewide cap. The lease governs the amount.
Idaho	No statewide cap. The lease governs the amount.
Illinois	No statewide cap. The lease governs the amount.
Indiana	No statewide cap. The lease governs the amount.
Iowa	No statewide cap. The lease governs the amount.
Kansas	No statewide cap. The lease governs the amount.
Kentucky	No statewide cap. The lease governs the amount.
Louisiana	No statewide cap. The lease governs the amount.
Maine	No statewide cap, but Portland and a few other Maine municipalities cap the yearly increase by ordinance
Maryland	No statewide cap, but Montgomery County and Prince George's County cap the yearly increase; the state does not
Massachusetts	No statewide cap. The lease governs the amount.
Michigan	No statewide cap. The lease governs the amount.
Minnesota	No statewide cap, but St Paul and Minneapolis have each adopted rent stabilisation by ballot; the state has none
Mississippi	No statewide cap. The lease governs the amount.
Missouri	No statewide cap. The lease governs the amount.
Montana	No statewide cap. The lease governs the amount.
Nebraska	No statewide cap. The lease governs the amount.
Nevada	No statewide cap. The lease governs the amount.
New Hampshire	No statewide cap. The lease governs the amount.
New Jersey	No statewide cap, but over a hundred New Jersey municipalities run their own rent control, and the ceiling is the town's rather than the state's
New Mexico	No statewide cap. The lease governs the amount.
New York	Set by board for stabilised units (Emergency Tenant Protection Act; NYC Rent Guidelines Board)
North Carolina	No statewide cap. The lease governs the amount.
North Dakota	No statewide cap. The lease governs the amount.
Ohio	No statewide cap. The lease governs the amount.
Oklahoma	No statewide cap. The lease governs the amount.
Oregon	7 % plus CPI, to 10 % (ORS 90.323, SB 608 (2019) as amended by SB 611 (2023))
Pennsylvania	No statewide cap. The lease governs the amount.
Rhode Island	No statewide cap. The lease governs the amount.
South Carolina	No statewide cap. The lease governs the amount.
South Dakota	No statewide cap. The lease governs the amount.
Tennessee	No statewide cap. The lease governs the amount.
Texas	No statewide cap. The lease governs the amount.
Utah	No statewide cap. The lease governs the amount.
Vermont	No statewide cap. The lease governs the amount.
Virginia	No statewide cap. The lease governs the amount.
Washington	7 % plus CPI, to 10 % (HB 1217 (2025), RCW 59.18)
West Virginia	No statewide cap. The lease governs the amount.
Wisconsin	No statewide cap. The lease governs the amount.
Wyoming	No statewide cap. The lease governs the amount.

The questions that follow.

Is there a national limit on rent increases in the United States?: No. There is no federal cap and no national rent index. Landlord and tenant law is state law, and most states set no ceiling on the amount at all, regulating the notice period instead of the figure.
Which states cap rent increases?: California, Oregon and Washington cap the yearly rise by a formula of a fixed percentage plus a regional CPI, to a statutory maximum. The District of Columbia caps stabilised units the same way. New York sets the figure for rent stabilised units by board vote. Every other state leaves the amount to the lease.
How do I calculate a CPI based rent increase?: Take the fixed percentage the statute sets, add the regional consumer price index your state publishes, and cap the result at the statutory maximum. The CPI is regional rather than a national headline rate, and using the wrong one gives a figure that looks right and is not lawful.
My state has no cap. How much can a landlord raise the rent?: On a renewal or a month to month tenancy, generally yes as to the amount but not as to the manner. Every state sets a notice period, and it usually lengthens with the size of the rise and the length of the tenancy.
What about city rent control?: It overrides the state answer for an address inside it. Over a hundred New Jersey municipalities run their own rent control, Maryland caps in two counties, Maine has municipal ordinances, and Minneapolis and St Paul have adopted stabilisation by ballot.

The same calculator, under other law.

A rent rises differently in each of these, and the page for each one says how. Anywhere else, the calculator still runs on that jurisdiction's own pack.

The calculation takes a minute. The date is what costs you.

Nobody forfeits a year because the arithmetic defeated them. They forfeit it because the anniversary fell in a quiet month, the index was not out yet, and by the time it was, there was nothing to remind them.

It watches the anniversary for youDardaris holds the lease, its reference quarter and its anniversary, and tells you a revision is due rather than waiting to be asked.
And works it out on the right two figuresThe reference quarter the lease names, against the same quarter a year earlier, applied to the rent in payment. The DPE block and the twelve month window are part of the same answer.
But it does not send itA letter that raises somebody's rent waits for you. Dardaris prepares it and says what it is based on, and you are the one who decides it goes.

The rules behind this depend on where the building is.Proration convention, deposit caps, notice periods and what a lease must carry are all set by the housing law your address sits in. Dardaris files every building under its own.How a pack works

The number is the easy part.

Dardaris keeps the lease, raises the invoice, matches the payment and writes down what it did. Bring one building and watch a month before you decide anything.

Start with one building

14 days before the first charge · Nothing is switched on until you say so