Prorated Rent Calculator
Moving in or out mid-month? This free prorated rent calculator figures out exactly what you owe for a partial month — pick the actual-days or 30-day daily rate method, add both ends of the lease, and handle the security deposit. No sign-up, everything runs in your browser.
Please note: results are estimates for informational purposes only and are not professional financial or legal advice. Your lease and local tenant laws decide which prorating method applies.
Calculate your prorated rent
You pay from this day through the end of the month, inclusive.
You pay from the 1st through this day, inclusive.
Whole months between the two partial months, charged at full rent.
Your prorated rent
| Period | Month | Daily rate | Days charged | Amount |
|---|
Estimates only: this is not professional financial or legal advice. Day-counting rules and deposit handling vary by lease and by state — when in doubt, confirm with your landlord or a local tenant advisor.
Actual days vs 30-day month — which is right?
Both methods are in everyday use, and they honestly disagree:
- Actual days: daily rate = monthly rent ÷ the real number of days in that month. Fairest to the calendar — a February day costs more than a July day because February has fewer days to spread the rent across.
- 30-day month: daily rate = monthly rent ÷ 30, no matter the month. Simpler bookkeeping, common with large property managers — but it overcharges February (only 28–29 days) and undercharges 31-day months.
Example: $2,000.00 rent, moving in on January 15 (17 of 31 days occupied). Actual-days: $2,000.00 ÷ 31 = $64.52/day × 17 = $1,096.77. 30-day: $2,000.00 ÷ 30 = $66.67/day × 17 = $1,133.33. Same move, $36.56 apart — which is why your lease should name a method.
Some landlords use a third variant, the annualized method: (monthly rent × 12 ÷ 365) × days occupied. It spreads rent evenly across the whole year instead of the specific month. This calculator sticks to the two monthly methods above because those are what almost all residential leases reference.
Prorated rent FAQs
How is prorated rent calculated?
Divide the monthly rent by a daily divisor, then multiply by the days you occupy the unit. With the actual-days method the divisor is the real number of days in that month; with the 30-day method it is always 30. Example: $2,000.00 rent, moving in January 15 — 17 of 31 days occupied. Actual-days: $2,000.00 ÷ 31 = $64.52 per day × 17 = $1,096.77. 30-day: $2,000.00 ÷ 30 = $66.67 per day × 17 = $1,133.33.
Which prorating method is fairest — actual days or a 30-day month?
Actual-days tracks the real calendar, so a February day costs more than a July day — most tenant guides and several courts favor it as the most defensible. The 30-day method is simpler for bookkeeping and common with large managers, but it overcharges February and undercharges 31-day months. Neither is automatically correct: your lease usually names one, and consistency matters. This calculator shows both methods side by side so you can see the difference before you sign.
How do I calculate prorated rent when moving out early?
Count from the 1st through your move-out day, inclusive, and multiply by the daily rate. Example: $1,800.00 rent, moving out February 10 in a non-leap year (28 days). Actual-days: $1,800.00 ÷ 28 = $64.29 per day × 10 days = $642.86. With the 30-day method the same move costs $600.00. Give notice exactly as your lease requires — the move-out date in the notice is usually the last day you pay for.
Is the security deposit prorated too?
Usually not. The deposit is separate from rent and is normally collected as a full amount — often one month's rent, subject to state caps — alongside your first payment. So a $2,000.00 rent with a $1,096.77 prorated first month plus an unpaid $2,000.00 deposit means $3,096.77 due at signing. Use the deposit section above to model paid versus unpaid deposits. Deposit limits and return deadlines are set by state law, so check yours.
What changes in February or a leap year?
Only the divisor. February has 28 days — 29 in a leap year like 2028 — so the actual-days daily rate rises because the same rent is spread over fewer days. The 30-day method ignores this entirely, which is exactly why February is where the two methods disagree most. If your move spans February, run both methods in the calculator and compare.
Can my landlord charge a full month when I move in mid-month?
It depends on your lease and local law. Many leases require prorating for partial months, and some states effectively require a reasonable proportional charge — but others leave it to the contract. Read the proration clause before you sign, get the method and the move-in date in writing, and keep this page's breakdown as your own math. This calculator gives estimates for informational purposes only and is not professional financial or legal advice.
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