Calculate prorated rent for a partial month using the monthly rent, the number of days charged, and your choice of the actual-days, 30-day, or 365-day method.
Customize This Calculator
Build your own version. Describe what you want changed, added, or compared.
Related Calculators
- Commercial Lease Calculator
- 6 Week Rent Calculator
- Charge Out Rate Calculator
- Shop Rate Calculator
- Service Price Calculator
- All Business Calculators
Prorated Rent Formula
Prorated rent is the share of a full month’s rent that you owe for the days you actually occupy a unit. The amount depends on which proration method your lease or state requires. The three common methods share the same structure: find a daily rent rate, then multiply by the number of days charged.
\text{Prorated Rent} = \frac{\text{Monthly Rent}}{\text{Days in Month}} \times \text{Days Charged}
\text{Prorated Rent} = \frac{\text{Monthly Rent}}{30} \times \text{Days Charged}
\text{Prorated Rent} = \frac{\text{Monthly Rent} \times 12}{365} \times \text{Days Charged}
Where:
Monthly Rent is the full rent for a complete month.
Days in Month is the actual number of days in the calendar month being prorated (28, 29, 30, or 31). The 30-day method replaces this with a fixed 30, and the 365-day method spreads the annual rent across 365 days.
Days Charged is the number of days you occupy the unit during that partial month. For a move-in, this is the move-in day through the last day of the month. For a move-out, it is the first day of the month through the move-out day.
The actual-days method is the most widely used and is what many courts expect. The 30-day (banker’s) method gives the same daily rate every month and is common in property management. The 365-day method is the most precise over a full lease and is often used for commercial leases.
Daily Rent and Days in Each Month
The table below shows how the daily rate changes with the method for a $1,500 monthly rent, and a reference for the number of days in each month.
| Method | Daily Rate ($1,500 rent) |
|---|---|
| Actual days, 28-day month | $53.57 |
| Actual days, 30-day month | $50.00 |
| Actual days, 31-day month | $48.39 |
| 30-day (banker’s) month | $50.00 |
| 365-day year | $49.32 |
| Days in Month | Months |
|---|---|
| 31 days | Jan, Mar, May, Jul, Aug, Oct, Dec |
| 30 days | Apr, Jun, Sep, Nov |
| 28 or 29 days | Feb (29 in a leap year) |
Example Problems
Example 1. Your rent is $1,200 per month and you move in on June 10. June has 30 days, so you are charged for June 10 through June 30, which is 21 days. Using the actual-days method, the daily rate is $1,200 / 30 = $40.00. The prorated rent is $40.00 × 21 = $840.00.
Example 2. Your rent is $1,500 per month and you move out on March 8, so you are charged for March 1 through March 8, which is 8 days. Using the 30-day method, the daily rate is $1,500 / 30 = $50.00. The prorated rent is $50.00 × 8 = $400.00.
FAQ
Which proration method should you use? Use the method named in your lease. If the lease is silent, check your state or local rules, since some require the actual number of days in the month and others allow a 30-day month. The actual-days method is the most common default.
Do you count both the move-in and move-out day? For a single partial month you count the move-in day through the end of the month, or the start of the month through the move-out day. You charge each occupied day once, so a full move-in plus move-out in the same period should not double count any day.
Is prorated rent always cheaper than a full month? Yes for a partial month, because you only pay for the days you occupy the unit. If you occupy every day of the month, the prorated amount equals the full monthly rent.