Prorated Rent Calculator
Calculate prorated rent for a partial month when moving in or out mid-month — by the actual days in the month, a 30-day month or a 365-day year.
For information and education only — not financial advice. Results are estimates based on the numbers you enter; check important decisions with a qualified professional.
How to use
- 1Enter the monthly rent and the move-in (or move-out) date.
- 2Choose the proration method your lease uses.
How it's calculated
Days in month method: rent ÷ days in that month × days occupied. Banker's month: rent ÷ 30. Yearly: rent × 12 ÷ 365 per day.
Frequently asked questions
Which proration method is standard?
It depends on the lease and local law. 'Actual days in the month' is most common; check your lease for the exact wording.
Is the move-in day included?
Yes — you pay for the move-in day through the end of the month. For move-out, you pay from the 1st through the move-out day.
Can a landlord refuse to prorate?
Some leases require a full month's rent. Laws vary by state and country, so check your lease and local rules.