RentCalc / Prorated rent
Prorated rent calculator
Moving in or out mid-month? Find the partial-month rent and the daily rate, and see how much the proration method changes it.
Prorated move-in rent
$0.00
Pick a date
Why the three methods disagree
A daily rate sounds simple until you ask "a day out of what?" Pick a month length and drag the move-in day. The shaded days are the ones you pay for, on a $1,500 rent.
- Days in month$550.00
- Annual rate$542.47
- 30-day month$550.00
In a 31-day month the "days in month" rate is cheapest per day ($48.39), and in February it's the most expensive ($53.57), while the annual rate charges $49.32 every day of the year. The 30-day method overcharges in short months and gives you the 31st free. None of them is wrong; your lease decides which one applies.
How to calculate prorated rent by hand
- Find the daily rate: monthly rent ÷ days in the month (e.g. $1,800 ÷ 31 = $58.06).
- Count the days you're responsible for, including the move-in day (a move-in on the 12th of a 31-day month is 20 days).
- Multiply: $58.06 × 20 = $1,161.29.
For a move-out, count from the 1st through your last day instead. If you hand the keys back on the 10th, you pay 10 days.
Prorated rent reference ($1,000 rent, 30-day month)
| Move-in day | Days paid | Rent owed |
|---|---|---|
| 1 | 30 | $1,000.00 |
| 5 | 26 | $866.67 |
| 10 | 21 | $700.00 |
| 15 | 16 | $533.33 |
| 20 | 11 | $366.67 |
| 25 | 6 | $200.00 |
| 28 | 3 | $100.00 |
| 30 | 1 | $33.33 |
Scale it: for $2,000 rent, double the amount.
Questions people ask
How do you calculate prorated rent?
Divide the monthly rent by the number of days in that month to get a daily rate, then multiply by the days you actually occupy the unit. Moving into a $1,500 apartment on June 20 means 11 days of a 30-day month, or $1,500 ÷ 30 × 11 = $550.
Does the move-in day count?
Usually yes. Most leases charge from the move-in date through the last day of the month, both days included. For move-outs, the last day you have the keys normally counts as well. This calculator counts both ends.
Which proration method is correct?
Whichever your lease says. Days-in-the-month is the most common. Some landlords use an annual daily rate (rent × 12 ÷ 365) so every day costs the same all year, and others use a flat 30-day "banker's month". On the same move-in, the three methods can differ by several dollars.
Is a landlord required to prorate rent?
In most US states, no law requires proration on move-in. It comes down to the lease and negotiation. On move-out, some states limit what can be charged after a properly noticed lease end, so check your state's landlord-tenant rules.
Can I pay prorated rent together with the first full month?
Many landlords do this when you move in late in the month. You pay the partial month plus the next full month at signing, and the regular schedule starts after that. The calculator shows both amounts.