Prorated Rent Calculator

When does prorating apply?

Prorated rent is a partial rent charge for the days a tenant actually occupies a unit when they don't move in on the 1st (or move out before the last day) of the month. Instead of charging a full month for a few days, you charge a fair share based on a daily rate.

You'll typically prorate rent when:

• Move-in mid-month — the tenant takes possession on, say, the 12th, so the first month covers only the 12th through the end of that month.
• Move-out mid-month — the lease ends partway through the final month, so you charge only up to the move-out day.
• Lease start dates that don't align to the 1st — common with month-to-month conversions or staggered renewals.

Two common billing methods:

• Actual days in the month — daily rate = monthly rent ÷ the real number of days in that calendar month (28–31). The most precise method and the one most courts and leases expect.
• Banker's 30-day month — daily rate = monthly rent ÷ 30, regardless of the actual month length. Simpler and consistent month to month, but slightly off for 28-, 29-, and 31-day months.

Always check your lease and local landlord-tenant law — some jurisdictions specify which method must be used, and the lease itself may define the formula.