Move-In Rent Proration Calculator
Amounts are in USD. Calculations stay in your browser.
Enter the rental details, then select Calculate.
Accounting breakdown
| Rent period | - |
|---|---|
| Monthly rent | - |
| Calculation | - |
| Prorated amount | - |
30-day accounting month:
Disclaimer: This calculator is provided for general informational purposes only. Verify lease terms, day-count conventions, local requirements, and all figures before charging or paying prorated rent.
How it's calculated
Move-in rent covers the move-in date through the last day of the month. The move-in day is billed.
Prorated rent = monthly rent × billed days ÷ days in the month
"Days in the month" depends on the method you choose: the actual length of that month (28 to 31 days) or a flat 30. The result is rounded to the nearest cent only at the end, and half a cent rounds up. A move-in on the 1st isn't prorated. The full month's rent is due.
Example: moving in on July 16
Monthly rent is $1,875 and the tenant moves in on July 16, 2026.
- Actual days in month: July 16–31 is 16 days. $1,875 × 16 ÷ 31 = $967.74
- 30-day accounting month: days 16–30 is 15 days. $1,875 × 15 ÷ 30 = $937.50
Actual days vs. 30-day accounting month
Use whichever method your lease or company policy specifies. If neither says, settle it before you bill, because the two methods can produce noticeably different amounts.
- Actual days in month divides rent by the real number of days in the month, so each day costs a little less in a 31-day month than in February.
- 30-day accounting month divides rent by 30 every month, so every day costs the same. The trade-off is that its day count doesn't always match the calendar.
Under the 30-day method, a move-in on the 31st is treated as day 30 and billed as 1 day. February is still divided by 30, so a move-in on February 28, 2026 is billed as 3 days even though only one calendar day remains. When the two methods give different totals, the result shows the actual-days amount for comparison.
Common questions
Is the move-in day charged?
Yes. If rent starts on a different day than the tenant gets the keys, enter the date rent starts under the lease.
Why not multiply a daily rate by the number of days?
A daily rate is usually rounded first. $1,875 ÷ 31 rounds to $60.48, and $60.48 × 16 is $967.68, six cents less than the exact $967.74. The calculator keeps the exact amount until the final step.