Landlord math toolkit

Prorated Rent Calculator

Estimate what is due for a partial month.

How We Calculated This

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Find the daily rent by dividing the monthly rent by the number of days in the month or by 30 for banker-style proration.
Count the occupied days in the partial month.
Multiply the daily rent by occupied days to estimate prorated rent.

Example

A unit rents for $1,860 and the tenant moves in on June 12 with occupancy through June 30.

June has 30 days, so the daily rate is $1,860 / 30 = $62.00.
Occupancy from June 12 through June 30 is 19 days.
Prorated rent is 19 x $62.00 = $1,178.00.

Assumptions

This calculator assumes the rent period stays within one calendar month.
Occupied days are counted inclusively from the start date through the end date.
Lease language and local law may require a different proration convention.

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

See full methodology

Frequently Asked Questions

Should I use actual days or a 30-day method?

Use whichever method matches the lease or your house rules. If your lease is silent, use the same method consistently and confirm it aligns with local requirements.

Does this calculator work for move-outs too?

Yes. Enter the partial occupancy dates for the final month and the calculator will estimate the prorated amount for that date range.

Why does the result differ by month?

The actual-days method changes with the number of days in the month, so February and 31-day months produce different daily rates.