Rent Increase Calculator accuracy and testing

Formula source

• New rent = target rent if provided, otherwise current rent x (1 + increase percent / 100). Annual incremental income = (new rent - current rent) x 12.

Test cases

Known limitations

• These calculators do not fetch live market rents, property values, platform fees, tax rates, mortgage quotes, rent-control rules, short-term rental regulations, or sale comps. Enter the current assumptions that apply to your property and review important decisions with qualified local professionals.

Assumptions

• All rents, nightly rates, occupancy, operating expenses, management fees, sale costs, appreciation, and reinvestment returns are user-entered assumptions.
• No platform rates, property management rates, rent caps, tax rates, brokerage fees, or market forecasts are hardcoded.
• Results are deterministic planning estimates and are not investment, legal, tax, accounting, lending, or property-management advice.
• Calculations run locally in the browser without uploading private property, tenant, reservation, financing, or sale data.

Unit handling

• Current Monthly Rent accepts values in $.
• Increase Percent accepts values in %.
• Target Monthly Rent accepts values in $.
• Annual Incremental Income is displayed as currency.
• New Monthly Rent is displayed as currency.
• Monthly Increase is displayed as currency.
• Effective Increase is displayed as a percentage.

Rounding rules

• Number displays use up to 2 decimal places in the calculator UI.
• Currency outputs are displayed with standard US dollar formatting.
• Percent outputs are displayed with two decimal places.
• Input precision follows configured step values where provided.

Version history

Change log