Prorated rent calculator
Calculate move-in or move-out rent. Check the counted dates and compare three daily-rate methods.
Your rental details
Estimated prorated rent
$900.00
15 rental days, April 16–30, 2026
Days in this month, move date included.
April 2026
15 occupied days, April 16–30
Brick: counted days. Sage: uncounted days. Mustard outline: move date.
$60.0000 per day
An estimate for one calendar month. No deposits, fees, discounts or legal entitlement included. Confirm the method in your lease.
Compare the three methods
| Method | Daily rate | Rent for your dates |
|---|---|---|
| Days in this month | $60.0000 | $900.00 |
| 365-day year | $59.1781 | $887.67 |
| 30-day month (capped) | $60.0000 | $900.00 |
All methods count the same days. Only the 30-day method caps rent at one month. Daily rates show four decimals; totals use the unrounded rate.
How to prorate rent
Daily rate × counted rental days.
Choose the method and billable dates specified in your agreement. Enter the monthly rent and move date, then check the displayed day range.
What prorated rent means
The three formulas
Actual month: monthly rent ÷ days in month × rental days
365-day year: monthly rent × 12 ÷ 365 × rental days
30-day method: min(monthly rent, monthly rent ÷ 30 × rental days)
The 30-day option counts actual calendar days and caps the charge at monthly rent. See the methodology for full-month and rounding details.
Move-in example
$1,800 rent, April 16 move-in
Counting April 16 through April 30 gives 15 rental days. April has 30 days, so the actual-month daily rate is $1,800 ÷ 30 = $60. The rent for those days is $60 × 15 = $900.00.
Using the 365-day formula for the same dates gives $1,800 × 12 ÷ 365 × 15 = $887.67. The capped 30-day method gives $900.00. If April 16 is excluded, every method uses 14 days instead. These are hypothetical calculations, not a determination of rent owed.
For February, a 31-day month and move-out scenarios, see the worked calculation guide.
Questions, answered
How does prorated rent work?
It allocates rent to part of a month using a chosen daily rate and the billable days. For example, 10 days of a 30-day month at $1,800 rent cost $600 under the actual-month method. Your agreement determines whether proration applies and which dates count.
Do I pay rent for my move-in or move-out day?
That depends on your agreement and applicable rules. This calculator includes the selected move date by default. Uncheck the option if the move date is not billable, then confirm the displayed day range.
Which proration method should I use?
Use the method specified in your lease or agreed with the housing provider. The calculator compares actual-month, 365-day-year and a capped 30-day method so you can see the effect of the convention. It does not select the legally applicable method.
Why does the 365-day result sometimes exceed a full month of rent?
Its daily rate is monthly rent × 12 ÷ 365. Multiplying that rate by 31 days can exceed one monthly payment. We show the formula without a cap; the capped 30-day option uses a different convention.
Does this calculator include deposits or utilities?
No. It calculates base rent for part of one calendar month. Add or prorate other charges separately only according to the terms that apply to them.
Sources & calculation notes
As of October 25, 2026. Numerical examples are hypothetical calculations using our published formulas and conventions, not quotes or legal limits.
- USAGov: Tenant rights — Starting point for finding state tenant-rights and complaint resources. This calculator does not determine legal obligations.
- U.S. Naval Observatory: Calendars — Background on the Gregorian calendar. Our date arithmetic uses Gregorian month lengths and leap years.