Prorated Rent Calculator
Work out partial-month rent for a move-in or move-out date, with the daily rate and days charged, comparing the 30/31-day, 365-day and 360-day methods.
Prorated Rent Calculator: with the default inputs, prorated rent is $232.26.
Both the move-in day and the move-out day are counted as days charged.
Your lease may name one. Days-in-the-month is the most common.
- Daily rate
- $58.06
- Days charged
- 4
- Days in the month
- 31
- Less than a full month by
- $1,567.74
Assumptions
- Both the move-in day and the move-out day count as days charged.
- Days-in-month method uses that calendar month's actual length (28–31 days, including leap-year Februaries). The yearly methods use 365 or 360 days and the actual number of days occupied.
- Prorated rent never exceeds one month's rent.
- Rent only: no deposits, fees, utilities or late charges.
| Method | Daily rate | Days | Prorated rent |
|---|---|---|---|
| Days in that month (selected) | $58.06 | 4 | $232.26 |
| 365-day year | $59.18 | 4 | $236.71 |
| 360-day banker's year | $60.00 | 4 | $240.00 |
The month-based method gives a different daily rate in every month: $64.29 in a 28-day February, $58.06 in a 31-day month. The yearly methods use the same rate all year.
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How this is worked out
The formula
Days charged (move-in) = days in month − move-in day + 1 Days charged (move-out) = move-out day Daily rate: days in month: rent ÷ days in that month 365-day year: rent × 12 ÷ 365 360-day year: rent × 12 ÷ 360 (= rent ÷ 30) Prorated rent = daily rate × days charged (never more than one month's rent)
Open How it’s calculated above to see this worked through with your own numbers.
What you enter
- Monthly rent
- A number.in dollars · 0 or more · defaults to 1800
- I'm…
- Choose one of 2 options.Moving in (pay from this date to month end) · Moving out (pay from the 1st through this date)
- Move-in or move-out date
- Both the move-in day and the move-out day are counted as days charged.defaults to today
- Proration method
- Your lease may name one. Days-in-the-month is the most common.Days in that month (28–31) · 365-day year (rent × 12 ÷ 365) · 360-day banker's year (rent ÷ 30)
What you get back
- Prorated rentmain answer
- Daily rate
- Days charged
- Days in the month
- Less than a full month by
What this assumes
- Both the move-in day and the move-out day count as days charged.
- Days-in-month method uses that calendar month's actual length (28–31 days, including leap-year Februaries). The yearly methods use 365 or 360 days and the actual number of days occupied.
- Prorated rent never exceeds one month's rent.
- Rent only: no deposits, fees, utilities or late charges.
About this calculator
When a lease starts or ends partway through a month, most landlords charge prorated rent: a daily rate times the days you actually have the place. The arithmetic is simple, but there are three common ways to get the daily rate, and on a $2,000 apartment they can differ by $30 or more. This calculator works out your partial month with the method you choose and shows the other two beside it, so you can check a landlord's number or pick the one your lease names.
How to use it
Enter the monthly rent, say whether you're moving in or out, and pick the date. Moving in, you pay from that day through the end of the month; moving out, from the 1st through that day — both count the day itself, which is how most leases read. Then choose the method:
- Days in that month — rent divided by 28, 29, 30 or 31. The most common, and the fairest within a month: a full month always costs exactly one month's rent.
- 365-day year — annual rent ÷ 365. Same daily rate all year, so a February move costs a little more per day than the month method would and a 31-day month a little less.
- 360-day banker's year — annual rent ÷ 360, which is the same as rent ÷ 30. Simple to do in your head, slightly higher daily rate, and the one most likely to come out in the landlord's favour in a 31-day month.
How to read the results
Prorated rent is what you owe for the partial month; daily rate and days charged show how it was reached. The comparison table runs all three methods on the same days. If a method would charge more than a full month — 31 days at rent ÷ 30 — the result is capped at one month's rent, since no lease charges more than that for the month.
Things to check in your lease
- Some leases charge the prorated amount with the first full month (move in on the 20th, pay the remainder of this month plus next month up front).
- Some count the move-out day as yours and some don't; take a day off if yours doesn't.
- A lease that names no method usually defaults to the days-in-the-month approach, but local law or custom can differ. Rent control or subsidy programs may set their own rule.
- Proration is a courtesy in many places, not a right: a lease can require a full month's rent regardless of the date.
Frequently asked questions
▸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'll live there. Moving in on September 16 at $1,500 a month: $1,500 ÷ 30 = $50 a day × 15 days = $750.
▸Is the move-in day included in prorated rent?
Usually yes — the day you get the keys counts as a day charged, and so does the move-out day. Check your lease; some exclude the move-out day.
▸Which proration method is most common?
Dividing by the actual days in the month. The 365-day method keeps the daily rate the same all year, and the 360-day (rent ÷ 30) method is used by some property managers because it is simple.
▸Do landlords have to prorate rent?
Not usually. Whether rent is prorated is normally set by the lease, not by law, so a lease can require a full month even if you move in on the 25th. Many landlords prorate on request.
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