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Prorated rent calculator

Enter the monthly rent, the date and the day rent is due. You get the days charged, the daily rate and the prorated amount, worked out three common ways.

Example

A tenant moves in on October 20, 2026, rent is $1,500.00 a month and due on the 1st.

Prorated rent$580.6512 of 31 days

Daily rate $48.39

Charged from October 20, 2026 through October 31, 2026.

The first full month is due on November 1, 2026.

Actual days in the rent period

$580.65

Monthly rent ÷ days in that rent period × days charged. This is what Prop Rental OS uses.

30-day month

$600.00

Monthly rent ÷ 30 × days charged. Simple, but a 31-day month then costs slightly more than the rent.

365-day year

$591.78

Monthly rent × 12 ÷ 365 × days charged. The same daily rate all year.

Three ways to prorate

Your lease may say which method to use, and local law may limit what you can charge. When the lease is silent, actual days in the period is the most common.

Actual days in the rent period

Monthly rent ÷ days in that rent period × days charged. This is what Prop Rental OS uses.

30-day month

Monthly rent ÷ 30 × days charged. Simple, but a 31-day month then costs slightly more than the rent.

365-day year

Monthly rent × 12 ÷ 365 × days charged. The same daily rate all year.

Common questions

What is prorated rent?

Rent charged only for the days a tenant has the home in a rent period, instead of the full month: usually the first month when a lease starts after the due date, and the last month when it ends before the period does.

Is the move-in day charged?

Yes. In this calculator the move-in day is the first day charged, and the move-out day is the last day charged.

Should I collect the prorated rent and the first full month at move-in?

That is your choice and your lease's. When the next due date is only a few days after move-in, collecting both at once saves the tenant a second payment days later.

Does Prop Rental OS do this automatically?

Yes. When you create a lease that starts between due dates, it works out the prorated rent and lets you charge it alone, charge it with the first full month, or waive it with a reason. At move-out it reduces that month's rent to the days used.

This calculator is for general information. Check your lease and local law before you charge a tenant.

Let the prorated charge add itself

Prop Rental OS bills prorated rent at move-in and move-out for you. Try the full product free for 14 days.

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