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Compare three ways to calculate part of a month’s rent, with the daily rate and days charged shown.
Prorated rent
$774.19Actual monthDaily rate
$48.3916 days from October 16, 2026 to October 31, 2026, including both dates, give $774.19 using your selected method.
| Method | Daily rate | Days charged | Prorated rent |
|---|---|---|---|
| Actual monthSelected | $48.39 | 16 | $774.19 |
| 365-day year | $49.32 | 16 | $789.04 |
| 30-day month | $50 | 16 | $800 |
Example figures.
Rates as of
Prorated rent is an amount assigned to part of a rent period. A monthly rent and a move date are enough to compare the arithmetic, but they do not establish which method the lease requires. This calculator shows actual-month, 365-day-year and fixed 30-day-month results together, so you can see the difference before using a figure.
Enter the rent for one complete month in US dollars. Choose Move-in if you want to count from the selected date through the end of that month. Choose Move-out if you want to count from the first of the month through the selected date. Both include the entered date. This is one calendar month’s calculation, with the first of the month assumed to be the start of the rental period.
Monthly rent is $1,500 and the move-in date is October 16, 2026. October has 31 days. Counting October 16 through October 31, including both dates, gives 16 days. Every method uses those same 16 days.
The difference is entirely due to the daily-rate convention. No method includes a different move-in date, tax, fee or deposit.
The actual-month divisor is 28, 29, 30 or 31, following the calendar. February has 29 days in a leap year. The annual method deliberately uses 365 even during a leap year. The fixed-month method deliberately uses 30 for every month, while still counting actual occupied dates. It does not apply a financial 30/360 convention that changes certain dates to an artificial day 30.
For a full February at $1,500 monthly rent, actual-month gives $1,500 in both a non-leap and a leap year. The annual method gives $1,380.82 for 28 days and $1,430.14 for 29 days. The fixed 30-day method gives $1,400 and $1,450 respectively. Checking the month length matters even when the monthly rent stays the same.
A fixed divisor can produce more than the monthly amount over 31 days. At $1,500 rent, the 30-day calculation gives $1,550 for all 31 days, and the annual calculation gives $1,528.77. The calculator displays that arithmetic without silently imposing a cap. A full-month payment or contractual limit must be checked separately before using either figure. A date comparison does not decide rent legally owed.
Only the calendar month containing your date is counted. This form does not calculate a period spanning several months, a rent cycle starting mid-month, rent changes during the month, payments already received or separate utility charges. A move-in on the final day counts one day; a move-out on the first day also counts one day. If the agreed move-out day should be excluded, this inclusive convention needs to be accounted for when reconciling the bill.
There is no government percentage or market rate in these formulas. The source below is provided for tenancy context and directs readers to state tenant-rights agencies. It does not endorse one national rent-proration formula. Read the agreement’s rent period, daily-rate method and payment terms, and check any rules applying to the property.
Moving out physically does not by itself determine the legal end of rent liability. Likewise, a calculated partial-month amount does not create a refund entitlement or justify withholding a security deposit. Keep a rent calculation separate from a deposit reconciliation, and confirm the applicable notice and return requirements.
If the lease is unclear, dates are disputed, a subsidy program applies, or a payment is being deducted from a deposit, ask the relevant housing authority or a qualified local advisor. Bring the agreement, payment record and notices. Those documents establish the context that a date-only calculator cannot supply.
The actual-month method uses the number of days in the selected month: 28, 29, 30 or 31. A fixed 30-day method always divides monthly rent by 30, while the annual method uses monthly rent times 12 divided by 365. This tool compares all three without deciding which your lease permits.
Choose Move-out and enter the final day you want counted. This calculator counts from the first of that calendar month through that date, including both dates. A move-out date alone does not establish when rent liability ends or whether a refund is due.
Choose Move-in and enter the first day you want counted. The calculator multiplies each method’s unrounded daily rate by the days from that date through the end of the month, including the move-in day. At $1,500 monthly rent, moving in October 16, 2026 counts 16 days and gives $774.19 under the actual-month method.
Proration assigns an amount to part of a rental period; it is not inherently good or bad. Different methods can give different totals for the same dates. Check the agreed method and applicable rules before using a result as a payment or refund amount.
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