Rent Increase Calculator: How Much Is Your Landlord Allowed to Raise Rent?

Last updated: March 2026 · 7 min read

Frequently Asked Questions

What is the formula to calculate rent increase percentage?

The percentage increase formula is: Rent Increase % = ((New Rent − Old Rent) ÷ Old Rent) × 100. This formula helps you understand how much your rent has increased. For example, if your old rent was $1,400 and your new rent is $1,540, the increase would be 10%.

How do I know if the rent increase is legal?

To determine if the rent increase is legal, you need to check the rent control laws in your state. Some states have statewide caps, while others have local laws that apply to specific cities or building types. You can use our rent increase calculator and check the laws in your area to understand your rights as a renter.

What are the rent control laws in my state?

Rent control laws vary by state, with some states having statewide caps and others having local laws. For example, California has a statewide cap of 5% + CPI, while New York has strict limits in NYC. You can check the specific laws in your state to understand how much your landlord can raise your rent.

How do I approach the conversation with my landlord about the rent increase?

Before approaching your landlord, calculate the rent increase percentage and check if it's within the legal limits. Then, review your budget using our rent affordability calculator to determine if the new rent is still affordable for you. When discussing with your landlord, be prepared to negotiate and provide evidence to support your case.

You just got a rent increase notice. Before you react, do the math — then understand whether it's legal, whether it's worth fighting, and whether staying or moving makes more financial sense. This guide covers how to calculate the percentage increase, what rent control laws apply in your state, and how to approach the conversation with your landlord.

How to Calculate Your Rent Increase Percentage

The percentage increase formula:

Rent Increase % = ((New Rent − Old Rent) ÷ Old Rent) × 100

Example: Old rent was $1,400, new rent is $1,540.
($1,540 − $1,400) ÷ $1,400 × 100 = 10% increase
Old Rent3% Increase5% Increase10% Increase15% Increase
$900$927$945$990$1,035
$1,100$1,133$1,155$1,210$1,265
$1,300$1,339$1,365$1,430$1,495
$1,500$1,545$1,575$1,650$1,725
$1,800$1,854$1,890$1,980$2,070
$2,000$2,060$2,100$2,200$2,300
$2,500$2,575$2,625$2,750$2,875

After calculating the increase, use our rent affordability calculator to check whether the new rent is still within your budget at your current income.

States with Rent Control or Rent Stabilization

Rent control limits how much and how often landlords can raise rent. It's more limited than most renters think — only a handful of states allow it, and most only apply to specific cities or building types.

StateRent Control StatusKey Details
CaliforniaStatewide cap + local lawsAB 1482: max 5% + CPI (up to 10%) for most buildings 15+ years old. SF, LA, Oakland have stronger local rules.
New YorkYes (NYC + some municipalities)NYC rent stabilization covers ~1 million apartments. Strict limits apply. Luxury deregulation largely ended.
New JerseyLocal onlyMany NJ cities (Newark, Jersey City, etc.) have local rent control. Varies widely by municipality.
OregonStatewideRent increases capped at 7% + CPI (max 10%) per year. Applies to buildings 15+ years old.
MarylandLocal onlyMontgomery County and Takoma Park have local ordinances.
Washington DCYesStrong rent control covering most pre-1975 buildings.
MinnesotaLocal onlySaint Paul has rent stabilization (3% annual cap).
All other statesNone or preemptedMany states (TX, FL, AZ, GA, etc.) explicitly prohibit cities from enacting rent control.
Important: Rent control laws change frequently. Always verify current rules with your local housing authority. This table reflects approximate status as of early 2026.

What's Legal Without Rent Control

In states without rent control, landlords can generally raise rent by any amount, subject to these requirements:

When to Negotiate a Rent Increase

Many tenants assume rent increases are non-negotiable. They often are — but not always. The best time to negotiate is before signing a renewal, when the landlord faces the cost of finding a new tenant:

When to Consider Moving Instead

Sometimes the math favors moving despite the hassle. Roughly calculate the break-even:

If the new apartment is $200/month cheaper, that's $2,400/year in savings. But if moving costs $3,000 upfront, you break even after 15 months. Moving only makes financial sense if you're staying in the new place long enough to recover the transition costs.

Also factor in: the new apartment's rent will be at market rate and can be increased just as aggressively at its next renewal. Check your affordability at the new rate using our calculator before deciding.

Notice Requirements by State: Quick Reference

For rent increases in states without rent control, advance notice requirements vary:

If your landlord gives insufficient notice, the increase may not be legally enforceable. Consult a local tenant rights organization if you receive a notice you believe is procedurally defective.

Sources: HUD.gov · Bureau of Labor Statistics · State rent control statutes · Last verified March 2026

Disclaimer: This content is for informational purposes only and does not constitute financial advice. Rent control laws change frequently — verify with your local housing authority. Source data from HUD.gov and BLS.gov. Last updated: March 2026.