Prorated rent calculator
A tenant moving in on the 15th shouldn't pay a full month — but the "right" prorated amount depends on which method the lease uses, and the difference between methods can be $40+ on a typical rent. This calculator shows all three so you can charge (or check) the correct number.
Prorated rent calculator
| Method | Daily rate | Days charged | Prorated rent |
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Frequently asked questions
How is prorated rent normally calculated?
The most common method divides the monthly rent by the actual number of days in that month, then multiplies by the days the tenant occupies. A $1,800 rent in a 30-day month is $60/day; moving in on the 16th (15 days of occupancy) gives $900.
What is the banker's month method?
It treats every month as 30 days regardless of length: daily rate = rent ÷ 30. Some leases and property managers prefer it for consistency across months. In 31-day months it slightly favors the landlord; in February it favors the tenant.
Which proration method is legally required?
In most states, none — the lease controls. Whichever method your lease names is the one to use; if the lease is silent, actual-days-in-month is the convention courts and property managers default to.
Do landlords have to prorate rent at all?
Usually no statute requires it, but charging a full month for partial occupancy invites disputes and bad reviews. Prorating at move-in (and stating the method in the lease) is standard practice.
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