Prorated Rent Calculator
Short answer
Prorated rent is rent for part of a month, when you move in mid-month or move out before month-end. Example: $1,800 rent, move-in 16 October in a 31-day month, actual-days method = $1,800 ÷ 31 × 16 = $929.03. Always use the method stated in your lease, and compare all three methods shown by the calculator.
Last verified: 2026-10-25. This is general information, not legal advice. City ordinances may be stricter and may override state rules. Check the official source for your city and state before acting.
Worked examples at a glance
| Method | Formula | Example: $1,800, 16 days |
|---|---|---|
| Actual days | Rent ÷ days in the month × days occupied | $929.03 in a 31-day month |
| 30-day | Rent ÷ 30 × days occupied | $960.00 |
| 365-day | Rent × 12 ÷ 365 × days occupied | $946.85 |
Start with your own dates: for $1,800 rent and 16 days occupied, the three methods give $929.03 (actual days, 31-day month), $960.00 (30-day), and $946.85 (365-day). This calculator shows all three side by side so you can compare them with what your lease says.
This is general information, not legal advice. City ordinances may be stricter and may override state rules. Check the official source for your city and state before acting.
Calculate prorated rent
Counting convention used here: for a move-in, days occupied run from the move-in date to the end of that month inclusive (the move-in day counts). For a move-out, days occupied run from the first day of the month to the move-out date inclusive (the move-out day counts). Some leases count differently — if yours does, use its convention instead.
Formulas
- Actual days: monthly rent ÷ days in that month × days occupied.
- 30-day method: monthly rent ÷ 30 × days occupied.
- 365-day method: monthly rent × 12 ÷ 365 × days occupied.
The three methods can give different answers for the same move. That is normal: they use different day-count bases. Your lease should state which method applies — if it does not, ask your landlord to confirm in writing before paying.
Worked examples
- Move-in, actual days: $1,800 rent, move-in October 16 in a 31-day month. Days occupied = 31 − 16 + 1 = 16. $1,800 ÷ 31 × 16 = $929.03.
- 30-day method: $1,500 rent, 10 days occupied. $1,500 ÷ 30 × 10 = $500.00.
- 365-day method: $2,400 rent, 15 days occupied. $2,400 × 12 ÷ 365 × 15 = $1,183.56.
Limitations
- This calculator does not read your lease. If your lease specifies a different method or counting convention, the lease figure governs what you are asked to pay.
- It does not account for rent concessions, credits, fees, or local rules that may change how a partial month is billed.
- Amounts are rounded to the nearest cent; landlords may round differently.
Sources
- No single federal rule prescribes a prorating method; the three methods above are the standard conventions used in leases and rental guidance. The method in your lease is the one that matters for your tenancy.
- For state and city rules that may affect your tenancy, check the official source for your city and state (see Guides).
Last verified: 2026-10-25.
Next step: use the result in the Move-in Cost Calculator to total your first-month cash.
Related guide: How to Calculate Prorated Rent — the same three methods, with move-in and move-out examples.
Frequently asked questions
What is prorated rent?
Prorated rent is rent for part of a month, calculated from the days you occupy the home.
Which method should I use?
Use the method stated in your lease. This calculator shows actual-days, 30-day, and 365-day figures side by side so you can compare them.
Does the move-in day count?
On this site, yes: move-in days run from the move-in date to month-end inclusive, and move-out days run from month-start to the move-out date inclusive, unless your lease counts differently.