How is the percentage increase calculated?

The new rent equals the current rent multiplied by (1 + percentage / 100). For example, a 5% increase on $1,200 gives $1,260.

How is the flat-dollar increase calculated?

The new rent simply equals the current rent plus the flat amount. For example, adding $75 to $1,200 gives $1,275.

What does the annual difference show?

It is the monthly difference multiplied by 12, representing how much more (or less) a tenant pays over a full year.

Can I calculate a rent decrease?

Yes. Enter a negative percentage (e.g., -3) or a negative flat amount (e.g., -50) to see the effect of a rent reduction.

Are there legal limits on rent increases?

Rent control laws vary by city and state. This tool performs the math only — always check local regulations before raising rent.

Rent Increase Calculator

Enter your current rent and a percentage or flat increase to see your new monthly rent and annual cost difference.

Rent Details

Current Monthly Rent ($)

Increase Type

Percentage Increase (%)

Use a negative number to calculate a rent decrease.

Results

Enter your rent details and click Calculate.

Summary

The Rent Increase Calculator helps landlords and tenants quickly determine the impact of a rent change. Enter your current monthly rent and specify either a percentage increase or a flat dollar amount — the tool instantly shows the new monthly rent, the monthly difference, and the total annual difference. All calculations are performed locally in your browser with no data sent to any server.

How it works

Enter your current monthly rent in the first field.
Choose whether to apply a percentage increase or a flat dollar increase.
Enter the increase amount (e.g., 5 for 5% or 100 for $100 flat).
The new monthly rent, monthly difference, and annual difference update instantly.
Use the Reset button to start over with a new calculation.

Use cases

Landlords calculating how much to raise rent at lease renewal.
Tenants evaluating whether a proposed rent increase is affordable.
Property managers forecasting annual rental income after rate adjustments.
Real estate investors modeling cash flow under different rent scenarios.
Renters budgeting for a new lease with a higher asking price.
Comparing the impact of a fixed dollar raise versus a percentage raise.

Frequently Asked Questions

Last updated: 2026-10-05 · Reviewed by Nham Vu