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Prorated rent calculator for move-ins and move-outs

The short answer

To prorate rent, divide the monthly rent by the days in the month, then multiply by the days the tenant is charged for. Moving in on March 15 at $1,500 a month is 17 of 31 days: $1,500 ÷ 31 × 17 = $822.58. Some leases use a 30-day month or a 365-day year instead, so use the method yours names.

Work out rent for a partial month when a tenant moves in or out. See the daily rate and the days charged, then copy the calculation for your records or the tenant.

Prorated rent

$822.58

17 of 31 days, Sunday, Mar 15, 2026 through Tuesday, Mar 31, 2026.

Rent per day: $48.39
Days charged: 17

Arithmetic, not legal advice. Your lease and state or local rules decide how rent is prorated.

How it works

The prorated rent formula

Prorated rent = (monthly rent ÷ days in the month) × days charged.

$1,500 rent, moving in March 15 (17 days charged), by method
Method	Rent per day	Prorated rent
Actual days (31)	$48.39	$822.58
A 30-day month	$50.00	$850.00
365 days a year	$49.32	$838.36

Using the calculator

Enter the monthly rent and whether the tenant is moving in or out.
Choose the date. Moving in counts from that date through the end of the month; moving out counts from the 1st through that date.
Choose the method your lease names.

The three methods

Actual days: rent ÷ the days in that month.
A 30-day month: rent ÷ 30, whatever the month. The amount never goes above a full month’s rent.
365 days a year: rent × 12 ÷ 365.

This is arithmetic, not legal advice. Your lease and your state or local rules decide how rent is prorated.

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Common questions

How do I calculate prorated rent?

Divide the monthly rent by the days in the month and multiply by the days charged. At $1,500 in a 31-day month, that’s $48.39 a day.

Does the move-in day count?

Usually yes, since the tenant has the home that day. This calculator counts it. Follow your lease if it says otherwise.

Is prorated rent required?

It depends on your lease and where the property is. Some leases and places require it and others don’t. Check your lease and local rules, or ask an attorney.

Which proration method should I use?

The one in your lease. If it doesn’t say, actual days is the most common, and the easiest to explain to a tenant.

When is prorated rent due?

Often with the move-in payment, along with the first full month if the move-in is late in the month. Put the date and amount in writing.

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