Landlord math toolkit

Rent Increase Calculator

Compare the current rent to a proposed increase.

How We Calculated This

If the new-rent mode is selected, subtract the current rent from the new rent to find the dollar increase.
If percent mode is selected, multiply the current rent by one plus the percent increase.
Convert the final difference back into both a dollar change and a percent change for easy comparison.

Current rent is $1,600 and you are considering a 4.5% increase.

This calculator does not check local notice periods or rent control limits.
Results show the math only and should be paired with your lease and local rules.
If you enter both a new rent and a percent, the selected mode determines which one is used.

This tool is for informational use only and is not legal, tax, or financial advice.

What if my increase is negative?

This tool will show the math, but it is designed primarily for increases. A lower new rent will appear as a negative change.

Can I use this for annual leases?

Yes. The result is still monthly rent math. Notice timing and legal compliance are separate from the calculator.

Should I round the new rent?

Most landlords round to a whole dollar amount for easier communication, but the calculator supports cents if needed.