Rent Increase Calculator: Work Out a Rent Rise
Work out the percentage of a rent increase by comparing your current rent with the new amount a landlord is proposing.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Rent increase | Monthly increase |
|---|---|---|
| $1,800 to $1,944 | 8.00% | 144 |
| $1,200 to $1,260 | 5.00% | 60 |
| $2,500 to $2,750 | 10.00% | 250 |
| $950 to $1,045 | 10.00% | 95 |
How This Calculator Works
Enter your current monthly rent and the new rent. The calculator finds the dollar difference and divides it by the current rent to express the increase as a percentage. That percentage is what you can weigh against local rent caps, inflation, and the going rate for similar units.
The Formula
Percentage Change
Old is the starting value, New is the ending value
Worked Example
Rent rising from $1,800 to $1,944 a month is an increase of $144. Measured against the current rent, that is an 8% increase — and over a full year it adds $1,728 to what you pay.
Key Insight
A rent increase compounds year over year, so a string of moderate-looking raises adds up fast. Comparing each proposed increase against inflation shows whether your rent is merely tracking prices or outpacing them.
Frequently Asked Questions
How do I calculate a rent increase percentage?
Subtract your current rent from the new rent, divide by the current rent, and multiply by 100. The result is the increase as a percentage.
Is there a limit on how much rent can rise?
It depends where you live. Some cities and states have rent control or rent stabilization that caps annual increases; many places have no limit at all. Check local law.
How much does the increase cost over a year?
Multiply the monthly increase by twelve. A $144 monthly rise, for example, adds $1,728 across a full year of the lease.
Should I compare my rent increase to inflation?
Yes. An increase in line with the cited inflation figure simply tracks rising prices; one well above it means your rent is climbing in real terms.
Can I negotiate a rent increase?
Often, yes — especially if comparable units nearby are cheaper or you are a reliable long-term tenant. Knowing the exact percentage strengthens your case.
Related Calculators
Data Sources & Benchmarks
This calculator draws on 1 independent, dated source.
Methodology & Review
The increase is the new rent minus the current rent; the percentage divides that by the current rent. Comparing it against inflation shows whether rent is tracking prices or outpacing them.
Written by Ugo Candido · Last updated May 17, 2026.