Prorated Rent Calculator
Work out rent for a partial month when a tenant moves in or out mid-month. Enter the rent and the date to see the actual-days, 30-day and 365-day results side by side, then turn the amount you pick into a rent receipt.
Free, no signup, runs in your browser. Last updated: October 23, 2026
How each proration method works
Every method multiplies a daily rate by the number of days the tenant has the unit that month. The only difference is how the daily rate is set.
- Actual days in month: monthly rent ÷ days in that month × days occupied. February has a higher daily rate than March because the same rent covers fewer days.
- 30-day month: monthly rent ÷ 30 × days occupied. Also called a banker's month. The daily rate is the same in every month.
- 365-day yearly rate: monthly rent × 12 ÷ 365 × days occupied. A full year of rent spread evenly over the year.
This calculator counts the move-in day and the move-out day as occupied days, keeps the daily rate unrounded, rounds the final amount to the cent, and never charges more than one month's rent.
Worked examples
| Scenario | Days | Actual days | 30-day | 365-day |
|---|---|---|---|---|
| $1,500 rent, move-in Feb 10, 2027 (28-day month) | 19 of 28 | $1,017.86 | $950.00 | $936.99 |
| $1,500 rent, move-in Mar 20, 2027 (31-day month) | 12 of 31 | $580.65 | $600.00 | $591.78 |
| $2,000 rent, move-out Apr 12, 2027 (30-day month) | 12 of 30 | $800.00 | $800.00 | $789.04 |
First example, actual-days method: $1,500 ÷ 28 = $53.5714 a day. February 10 through February 28 is 19 days, so 19 × $53.5714 = $1,017.86.
What to put on a prorated rent receipt
- The exact prorated amount, not the full monthly rent.
- The partial period it covers, such as February 10 to February 28, 2027.
- The date you received the payment and how it was paid.
- A short note with the method, for example “Prorated rent, 19 of 28 days, actual-days method.”
The button above fills in the amount and the period on our free rent receipt generator. Add the landlord, tenant and property details, then download the PDF. See the rent receipt template for the other fields, and state rent receipt requirements for states where receipts are required on request or for cash.
Frequently asked questions
Which proration method is most common?
There isn't one universal method. Many landlords use the actual-days method because it follows the real calendar, and others use a 30-day month or a yearly daily rate because the daily figure stays the same all year. If your lease names a method, use that one. Otherwise pick one method, tell the tenant which one you used, and apply it the same way every time.
Is the move-in or move-out day counted?
This calculator counts both. For a move-in, it charges from the move-in date through the last day of that month. For a move-out, it charges from the 1st of the month through the move-out date. If your lease counts days differently, adjust the number of days and recalculate.
Why do the three methods give different amounts?
They use different daily rates. The actual-days method divides the rent by the days in that month (28 to 31), the 30-day method always divides by 30, and the 365-day method spreads a full year of rent over 365 days. In short months the actual-days rate is higher; in 31-day months it is lower.
What should I write on the receipt for prorated rent?
Write the exact prorated amount, the partial period it covers (for example February 10 to February 28, 2027), the date you received the payment and the payment method. A short note such as 'Prorated rent, 19 of 28 days, actual-days method' makes the math easy to check later. The Make a receipt button copies the amount and period into our free generator for you.
Can the prorated amount be more than a full month's rent?
With the 30-day method, a full 31-day month works out to 31 days of rent. This calculator caps every result at one month's rent, so a partial month never costs more than a full one.
Is anything I type sent to a server?
No. The math runs in your browser, nothing you type is stored, and the receipt link only carries the amount and dates in the address bar.
This calculator does arithmetic only. It isn't legal or tax advice. Your lease and local rules decide how rent is prorated.