Rent Increase Calculator
Work out a rent increase three ways: see your new rent after a percentage hike, find the exact percent rise from an old and new figure, or project rent over several years of compounding increases. Optionally check the result against your income and a local rent-control cap.
Formula
Worked example
A 5% increase on $1,500 rent: monthly increase = 1,500 × 0.05 = $75, so the new rent is $1,575, costing $900 more over a year. Over 5 years at 5% a year it compounds to 1,500 × 1.05^5 = $1,914 a month.
How a rent increase is calculated
A percentage rent increase raises your monthly payment by that fraction of the current rent. Multiply the current rent by the increase as a decimal to find the extra dollars per month, then add that to the original rent to get the new figure. For example, a 5% increase on $1,500 adds $75 per month. Because rent is paid every month, even a small percentage compounds into a meaningful yearly cost when you multiply the monthly difference by twelve.
Finding the percent increase from two rents
If your landlord proposes a new rent and you want to know the percent rise, switch to the find-percent mode. Subtract the old rent from the new rent to get the dollar change, divide that by the old rent, then multiply by 100. Going from $1,500 to $1,650 is a difference of $150, which divided by $1,500 is 0.10, or a 10% increase. This is the same percentage-change formula used across finance, and it tells you instantly whether an offer is modest or steep.
Projecting future rent over several years
Rent increases compound: next year a percentage is applied to an already-higher rent, not the original. The future-rent mode multiplies your current rent by one plus the yearly rate, raised to the number of years, and shows a year-by-year table and chart. At 5% a year, $1,500 becomes about $1,914 after five years and $2,443 after ten, far more than simple addition would suggest. Seeing the compounding helps when deciding how long to stay or whether to lock in a longer lease.
Affordability and rent-control caps
Turn on the affordability check to see your new rent as a share of gross monthly income; a widely used benchmark is the 30% rule, which suggests keeping rent at or below about 30% of gross income. Turn on the cap comparison to check the increase against a local limit, for example California AB 1482 caps most increases at 5% plus local inflation up to a maximum of 10%, and many cities set their own figures. These are planning estimates: your actual rights and any legal caps depend on your lease and local law, so confirm with a tenant resource or housing authority before a renewal.
Reference: typical increases and example caps
| Situation | Typical figure | Notes |
|---|---|---|
| Modest annual increase | 0-3% | Often near or below inflation |
| Typical annual increase | 3-7% | Common in many rental markets |
| Steep increase | 10%+ | Worth negotiating or comparing listings |
| California AB 1482 cap | 5% + CPI, max 10% | Applies to many but not all units |
| Affordability guideline | ~30% of gross income | The 30% rule benchmark |
Caps change yearly and vary by city; confirm the current figure with your local housing authority.
Frequently asked questions
How do I calculate a 5% rent increase?
Multiply your current rent by 0.05 to get the monthly increase, then add it to the rent. On $1,500, that is $75 more per month, for a new rent of $1,575 and $900 extra over a full year.
How do I find the percent increase from my old and new rent?
Subtract the old rent from the new rent, divide by the old rent, and multiply by 100. Going from $1,500 to $1,650 is $150 ÷ $1,500 = 0.10, or a 10% increase. Use the find-percent mode to do this automatically.
How much will my rent be in 5 or 10 years?
Use the future-rent mode. It compounds the yearly increase, so at 5% a year $1,500 grows to about $1,914 after five years and $2,443 after ten. The year-by-year table shows each step and the total extra you pay across the period.
Is there a legal limit on how much rent can go up?
It depends on where you live. Some states and cities have rent control or rent stabilization laws that cap annual increases and require notice; California AB 1482, for example, limits many increases to 5% plus local inflation up to 10%. Many areas have no cap at all, so always check your lease and local housing authority.