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Prorated Rent Calculator
Enter the monthly rent, your move-in day, and the number of days in that month to get the exact prorated amount due at move-in.
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How prorated rent is calculated
- Daily rate = monthly rent ÷ total days in the month. Most landlords use the actual number of days in the move-in month (28, 29, 30, or 31).
- Prorated rent = daily rate × number of days the tenant will occupy the unit. If you move in on the 15th of a 30-day month, you pay for 16 days (the 15th through the 30th, inclusive).
- Why inclusive counting: the day you move in is day one of your tenancy. Most states treat both the first and last day as occupancy days when computing proration.
- Alternative method: some landlords use a 365-day year (annual rent ÷ 365 × days). This produces slightly different results and is less common for monthly leases.
Worked example
Monthly rent: $1,500. Move-in date: March 15. March has 31 days. Daily rate: $1,500 ÷ 31 = $48.39. Days in residence: 31 − 15 + 1 = 17 days. Prorated rent: $48.39 × 17 = $822.58. The tenant pays $822.58 at move-in instead of the full $1,500. Starting April 1, full rent is due.
Frequently asked questions
Does the lease start on the move-in day or the first of the month?
That depends on your lease agreement. Most leases have the first-of-month rent due date start the month after move-in; the prorated amount covers the partial first month. Always confirm with your landlord what day the full monthly rent cycle begins.
What if I move in on the 1st?
No proration is needed — you occupy the full month and owe the full monthly rent. Enter 1 as the move-in day and you will see the prorated amount equals the full rent.
Is prorated rent standard practice?
Yes, prorating rent for the first partial month is standard practice and is required by landlord-tenant law in many states. If your landlord refuses to prorate, check your state's landlord-tenant statutes.
What about the last month?
If a tenant gives notice mid-month and wants to move out before the end of the month, the same daily-rate method applies in reverse. This calculator handles move-in proration; for move-out, apply the same formula: days remaining × daily rate.
Formulas last reviewed . Results are estimates for educational use; not financial advice. Methodology →