Prorated Rent Calculator – Move-In or Move-Out Partial Month (Free)

Prorated rent calculator

Tenant moving in or out mid-month? Work out the partial rent in seconds, using the method your lease specifies.

Prorated rent

Days in the month–

Days charged–

Daily rate–

Difference from full month–

Rent due–

The three proration methods

Actual days: rent ÷ days in that month × days occupied
30-day month: rent ÷ 30 × days occupied
365-day year: rent × 12 ÷ 365 × days occupied

Example: a tenant moves in on September 16 at $1,500 a month. September has 30 days and they occupy the 16th through the 30th, which is 15 days. At $50 a day, the prorated rent is $750. For a move-out, count from the 1st through the move-out day, so moving out on March 10 at $3,100 is 10 days × $100 = $1,000.

Both the move-in and move-out days count as occupied. February matters: $1,450 rent for a February 15 move-in is $750 in a 29-day leap-year February (2028), but more in a 28-day one. With the 30-day method, a 31-day month can work out above a full month's rent, so this calculator caps the result at the monthly rent.

Tips for landlords

Write the proration method into the lease so there's no argument later.
Many landlords collect the first full month at move-in and the prorated amount with the second month's rent, so the tenant's rent is due on the 1st from then on.
Log the prorated payment as rent income for that month. Our tracker's rent ledger flags it as a short month so you can see why it's partial.

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FAQ

How do you calculate prorated rent?

Divide the monthly rent by the number of days in the month (or 30, or use annual rent ÷ 365), then multiply by the days the tenant occupies the unit, counting both the move-in and move-out days.

Which proration method should I use?

Use whatever your lease specifies. Actual days in the month is the most common default. If the lease is silent, pick one method and use it consistently.

Do landlords have to prorate rent?

Rules vary by state and depend on the lease. Some leases make the tenant responsible through the end of a notice period. Check your lease and local law.