Prorated Rent Calculator
Calculate the prorated rent for a partial month.
Prorated rent is the partial month's rent owed when a tenant moves in or out mid-month. Most landlords calculate it as (Monthly Rent ÷ Days in Month) × Days Occupied. This calculator handles both move-in and move-out scenarios and adjusts automatically for month length — no spreadsheet needed.
Inputs
Results
Prorated Rent
$1,067
Days Occupied
16
Daily Rate
$67
Understanding This Calculator
Learn the standard method for charging a fair partial month of rent when a tenant moves in or out mid-month.
How the math works
The near-universal convention prorates by the calendar month: Daily rate = Monthly rent ÷ Days in that month, then Prorated rent = Daily rate × Days occupied. Days occupied counts the move-in day through the last day of the month, inclusive.
Because months have 28–31 days, the daily rate changes with the month — $2,000 in a 31-day month is $64.52 per day, but $71.43 per day in February. Some landlords instead use a fixed 30-day "banker's month" or a 365-day annual method (rent × 12 ÷ 365); all are acceptable if stated in the lease, but the calendar-month method is the most common and easiest to defend.
Worked example
Using the defaults: rent of $2,000, move-in on day 15 of a 30-day month.
- Daily rate = 2,000 ÷ 30 = $66.67
- Days occupied = 30 − 15 + 1 = 16 days (the move-in day counts)
- Prorated rent = 66.67 × 16 = $1,066.67
If the same tenant moved in on the 15th of a 31-day month, the daily rate drops to $64.52 but the days rise to 17, giving $1,096.77.
Tips
- Write the proration method into the lease before move-in — disputes almost always come from unstated assumptions.
- Count the move-in day as an occupied day; keys in hand means rent is owed.
- Many landlords collect a full first month plus deposit up front and prorate the second month instead, which simplifies bookkeeping.
- For a move-out proration, count from the 1st through the last occupied day using the same daily-rate method.