Rent increase calculator
Enter the current rent and a percentage, an index change or the proposed new rent. You get the new rent, the percent, and what it adds per month and per year.
Runs in your browser: nothing you enter is sent anywhere.
How to use it
- Pick the mode: a percentage, an index change, or a proposed new rent.
- Enter the current rent and the matching figures.
- Read the new rent, the percent and the extra cost per month and per year.
How it works
Percent mode: new rent = rent × (1 + p ÷ 100). Index mode: new rent = rent × (index now ÷ index at the last change). New rent mode: p = (new ÷ rent − 1) × 100. The monthly difference is new − current and the yearly difference is 12 times that.
Worked example
Rent is 1,000 and the index moves from 100 to 103.2. The new rent is 1,000 × 1.032 = 1,032, an increase of 3.2%, or 32 a month and 384 a year.
Tips
- This tool does no legal checks. Maximum increases, notice periods and the indices allowed depend on where you live and on your contract.
- Several increases compound: 3% twice gives 6.09%, not 6%.
- To see what an increase does to a landlord’s return, try the rental yield calculator.
Frequently asked questions
How do I calculate a rent increase?
Multiply the current rent by 1 plus the increase as a decimal. A 3% increase on 1,000 gives 1,000 × 1.03 = 1,030, which is 30 more per month and 360 more per year.
How does an index-linked rent increase work?
The rent changes in the same proportion as the index. If the index went from 100 to 103.2, the rent is multiplied by 1.032, so 1,000 becomes 1,032. Use the index named in your lease.
Is there a legal limit on how much rent can go up?
Rules differ by country, region and type of lease, and some places have none. This calculator only does the arithmetic and does not check any limit, so check your lease and local rules before agreeing to a figure.
How do I find the percent of a proposed new rent?
Divide the new rent by the current rent, subtract 1 and multiply by 100. Going from 1,000 to 1,075 is a 7.5% increase.