Prorated Rent Calculator
Calculate prorated rent for a move-in or move-out in the middle of the month — by actual days in the month, by a yearly daily rate or a 30-day banker’s month — plus what is due on move-in day.
How it works
Actual days: daily rate = rent ÷ days in the month · yearly: daily rate = rent × 12 ÷ 365 · banker’s: daily rate = rent ÷ 30 · move-in days = days in month − move-in day + 1 · move-out days = move-out day · prorated rent = daily rate × days
When a lease starts or ends partway through a month, landlords usually charge only for the days you occupy the home. The most common method divides the monthly rent by the number of days in that month; some leases use a yearly daily rate (12 months of rent ÷ 365) so every day costs the same all year, and others use a 30-day “banker’s month”. Both the move-in and move-out days count as occupied. Your lease decides which method applies.
Worked example
Rent is 1,500 and you move in on October 18, 2026. October has 31 days, so you occupy 14 days (31 − 18 + 1). At 1,500 ÷ 31 = 48.39 a day, the prorated rent is 677.42. If the landlord also collects November’s rent at signing, you pay 2,177.42 on move-in day.
Sources: Investopedia — Prorate: definition and how to calculate · Wikipedia — Pro rata
Frequently asked questions
How do I calculate prorated rent?
Divide the monthly rent by the number of days in the month to get a daily rate, then multiply by the days you will live there, counting the move-in day. For 1,500 rent and 14 days in a 31-day month: 1,500 ÷ 31 × 14 = 677.42.
Which method is fairest?
The yearly method (rent × 12 ÷ 365) charges the same daily rate in every month, so February is not more expensive per day than July. The actual-days method is the most common; the 30-day method is simplest. Use whatever your lease states.
Is the move-in day included?
Yes — you have the keys that day, so it is normally charged. When moving out, the last day you occupy the unit is usually charged too.
Do I have to pay the prorated rent and the next month together?
Many landlords collect the partial month plus the first full month at signing, especially when you move in late in the month. Others add the prorated amount to the second month. Ask before you sign.
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Educational estimate, not financial advice. Your income, prices, taxes and returns will differ — use it to plan, then check the numbers against your own bank statements and, for big decisions, a qualified adviser.