How this calculator works
Daily rate = monthly rent ÷ the basis your lease uses (days in the actual month is most common; some leases use 30 days or 365 ÷ 12). Move-in charges from the move-in day through month end; move-out charges the days before it.
- Daily rate, actual days: monthly rent ÷ days in that month (the most common method).
- Daily rate, 30-day month: monthly rent ÷ 30.
- Daily rate, 365-day year: monthly rent × 12 ÷ 365.
- Move-in: days charged = days in month − move-in day + 1. Move-out: days charged = move-out day − 1. Prorated rent = daily rate × days charged.
Worked example
With these inputs: monthly rent $1,650; month 9; year 2026; move-in day 18; this is a Move-in; daily rate basis Days in that month.
The result is prorated rent due $715.00, with days charged 13 of 30 and daily rate $55.00.
Which daily-rate method does my lease use?
Look for "prorated" or "proration" in the lease. Most landlords divide by the actual number of days in that month, so a day costs more in February than in March. Some use a flat 30-day month, and some use the yearly rent ÷ 365. The difference is usually small, but on a high rent it's worth using the method your lease names.
If your lease doesn't say, ask the landlord which one they use before you pay. Having the number from this calculator ready makes that conversation quick.
Move-in vs move-out, day by day
Move-in counts the move-in day itself. Moving in on the 18th of a 30-day month means paying for the 18th through the 30th, which is 13 days. Move-out counts the days before the day you enter, so enter the first day you won't be living there. Entering the 16th charges days 1 to 15.
Some landlords collect the prorated amount with the first full month's rent. Add both to your bill tracker so the larger first payment doesn't catch you out.
Frequently asked questions
How do you calculate prorated rent?
Work out a daily rate (monthly rent ÷ days in the month is most common) and multiply it by the number of days you'll live there that month.
What is prorated rent for moving in on the 15th?
In a 30-day month, move-in on the 15th covers 16 days (15th to 30th), so prorated rent is 16/30 of the monthly rent. For $1,500 rent, that's $800.
Do landlords have to prorate rent?
It depends on your lease and local law. Many leases include proration for move-in. For move-out, it's common when you give proper notice and end the lease mid-month, but not guaranteed. Check your lease and local tenant rules.
Is the move-in day included in prorated rent?
Yes. You're charged from the move-in day through the last day of the month. For move-out, you pay through the last night you live there.
Why is prorated rent different in February?
With the actual-days method, February's daily rate is higher because the same monthly rent is split over 28 or 29 days instead of 30 or 31.