Landlords & tenants
Prorated rent calculator
Calculate partial-month rent for any move-in or move-out date — actual days, 30-day banker's month, and 365-day methods side by side. Free, instant, no signup.
Last updated: July 2026
Enter your monthly rent and a date to see all three proration methods side by side.
Runs in your browser — nothing you type is saved. The move-in and move-out day both count as occupied days.
How the prorated rent calculator works
Prorated rent is the partial-month amount a tenant pays when a tenancy starts or ends on any day other than the first or last of the month. The calculator counts the days of possession — the move-in day through the end of the month, or the first of the month through the move-out day, with both endpoint days counted as occupied — and multiplies them by a daily rate. Because leases and landlords compute that daily rate differently, it shows all three common methods at once so you can see exactly how much the choice of method changes the bill.
How to calculate prorated rent
To calculate prorated rent, divide the monthly rent by the number of days in that month to get a daily rate, then multiply the daily rate by the number of days the tenant occupies the unit. For $1,800 rent and a June 20 move-in, that's $60 × 11 days = $660.
- Actual days: rent ÷ days in that month × days occupied
- Banker's month: rent ÷ 30 × days occupied (the 31st is treated as the 30th)
- 365-day rate: rent × 12 ÷ 365 × days occupied
In 30-day months like June the first two methods match exactly. In 31-day months they split: for the same $1,800 rent, a July 20 move-in costs $696.77 by actual days (12 days at $58.06) but $660.00 by banker's month (11 days at $60). Splitting that partial month with roommates? Divide it fairly with the rent split calculator.
Worked example: $1,800 rent, move in June 20
June has 30 days, so a June 20 move-in means 11 occupied days (June 20 through June 30, counting the move-in day). Here is what each method charges:
| Method | Daily rate | Days charged | Prorated rent |
|---|---|---|---|
| Actual days in month | $60.00 | 11 | $660.00 |
| 30-day banker's month | $60.00 | 11 | $660.00 |
| 365-day (annual) rate | $59.18 | 11 | $650.96 |
State rules: the lease usually controls
No state forces a landlord to accept a mid-month move-in, and in most states no statute dictates a proration method — the lease controls, and anything not covered is negotiated. The main exceptions come from states that adopted the Uniform Residential Landlord and Tenant Act, whose statutes (for example Florida Statute § 83.46(1) and Arizona A.R.S. § 33-1314(C)) make rent "uniformly apportionable from day to day" by default, plus move-out rules like California Civil Code § 1946 and Texas Property Code § 91.001(d), which end a properly noticed month-to-month tenant's rent liability at the termination date. If your state is not in the table, assume the lease controls and check your state statute.
| State | Statute | What it says |
|---|---|---|
| Alaska | Alaska Stat. § 34.03.020 | Unless the lease says otherwise, rent is "uniformly apportionable from day to day" — daily proration is the statutory default. |
| Arizona | A.R.S. § 33-1314(C) | Unless the lease says otherwise, rent is "uniformly apportionable from day to day" — daily proration is the statutory default. |
| California | Cal. Civ. Code § 1946 | Move-out rule: a month-to-month tenant who gives proper notice owes rent only through the termination date. |
| Florida | Fla. Stat. § 83.46(1) | Unless the lease says otherwise, rent is "uniformly apportionable from day to day" — daily proration is the statutory default. |
| Iowa | Iowa Code § 562A.9 | Unless the lease says otherwise, rent is "uniformly apportionable from day to day" — daily proration is the statutory default. |
| Kansas | K.S.A. § 58-2545(c) | Unless the lease says otherwise, rent is "uniformly apportionable from day to day" — daily proration is the statutory default. |
| Kentucky | KRS § 383.565 | Unless the lease says otherwise, rent is "uniformly apportionable from day to day" — daily proration is the statutory default. |
| Montana | MCA § 70-24-201 | Unless the lease says otherwise, rent is "uniformly apportionable from day to day" — daily proration is the statutory default. |
| Nebraska | Neb. Rev. Stat. § 76-1414 | Unless the lease says otherwise, rent is "uniformly apportionable from day to day" — daily proration is the statutory default. |
| Oregon | ORS § 90.427(10) | Move-out rule: a month-to-month tenant who gives proper notice owes rent only through the termination date. |
| South Carolina | S.C. Code § 27-40-310(c) | Unless the lease says otherwise, rent is "uniformly apportionable from day to day" — daily proration is the statutory default. |
| Tennessee | Tenn. Code § 66-28-201 | Daily apportionment applies "upon agreement" — the lease must opt in; there is no automatic daily proration. |
| Texas | Tex. Prop. Code § 91.001(d) | Move-out rule: a month-to-month tenant who gives proper notice owes rent only through the termination date. |
This is general information, not legal advice. Statutes are cited as verified in July 2026 and can change; other states may have similar provisions. Always read your lease and current state statute, or talk to a local attorney.
Moving out and need to give notice first? Generate a dated, printable letter with the notice to vacate letter generator — the proration above only helps if your notice was valid.
Prorated rent FAQ
Does a landlord have to prorate the first month's rent?
In most states, no — proration for a mid-month move-in is set by the lease or negotiated, not required by statute. In URLTA states such as Arizona, Florida, and Kansas, rent is apportionable day to day by default unless the lease says otherwise. Check your lease first.
How is prorated rent calculated in a 31-day month?
With the actual-days method you divide by 31, so $1,800 becomes $58.06 per day instead of $60. A 30-day banker's month ignores the 31st entirely — a July 20 move-in is billed 11 days instead of 12. Use whichever method your lease names.
What is second-month proration?
The landlord collects a full month's rent at signing and applies the partial-month credit to the second month instead. Total rent paid is identical; it just avoids handing over keys for only a few days of rent. Many landlords use it for move-ins late in the month.
Which proration method should I use?
If the lease names a method, that controls. Otherwise, actual days in the month is the most common and the easiest to defend, because the tenant pays exactly for days of possession. The banker's month simplifies bookkeeping; the 365-day rate suits annualized leases.
Do I get prorated rent when I move out mid-month?
It depends on your state and tenancy type. In California and Texas, month-to-month tenants who give proper notice owe rent only through the termination date. Under a fixed-term lease you generally owe the full month unless the lease or the landlord agrees otherwise.
Next step
Vacancy coming? Fill it for free
If you are prorating a move-out, your unit is about to sit empty. List it on Brixaz free — $0 fees, no commissions, direct contact with local renters. Tenants: browse houses, apartments, and rooms near you.