Prorated Rent Calculator
Calculate prorated rent for a mid-month move-in or move-out, or any date range, using actual days in the month, a 365-day year or a 30-day month.
When a lease starts or ends partway through a month, tenants usually pay only for the days they occupy the unit. Landlords work out that partial rent in one of three ways, and the choice can move the figure by a noticeable amount. This calculator handles move-ins, move-outs and longer date ranges with each method so you can check a bill or a move-in statement.
How to use this tool
- Enter the full monthly rent.
- Choose moving in, moving out or a custom date range.
- Enter the move-in or move-out date (and the end date for a range).
- Pick the daily rate method your lease uses, or compare all three.
Formula
Prorated rent = days charged × daily rate
Daily rate is rent ÷ days in that month (actual), rent × 12 ÷ 365 (yearly), or rent ÷ 30 (30-day month). Both endpoints are charged. Full calendar months use full rent; each partial month is capped at monthly rent. Check that this convention matches your agreement.
Example
Rent is $1,200 and you move in on 10 February 2026. February 2026 has 28 days, so you pay for 19 days (the 10th to the 28th). With actual days the daily rate is $1,200 ÷ 28 = $42.86 and the prorated rent is $814.29. The 365-day method gives $1,200 × 12 ÷ 365 × 19 = $749.59, and the 30-day method gives $1,200 ÷ 30 × 19 = $760.00.
Frequently asked questions
Which proration method is most common?
Actual-days uses the calendar month length. The fixed 365-day divisor keeps the daily rate unchanged, including leap years. Use your agreement rather than assuming a universal method.
Is the move-in day included?
This model counts both endpoints. Whether a date is billable depends on your agreement and local rules; enter the first and last dates that should be charged.
Why is February so different?
With the actual-days method the daily rate in February is rent ÷ 28, higher than in a 31-day month, so the same number of days costs more.
This tool gives an estimate for general information only. It is not financial, tax, legal or medical advice — check with a qualified professional before you rely on the result.
Last updated: 2026-10-30