Moving in or out partway through the month? Enter the monthly rent and the date to see the daily rate and the prorated rent owed. Compare the three common methods (actual days in the month, a 365-day year, or a banker's 30-day month) and calculate a custom range across several months.
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Enter your values to see the result.
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How to use the Prorated Rent Calculator
Enter the monthly rent.
Choose moving in, moving out or a custom range and pick the date(s).
Select the proration method in your lease (actual days in the month is the most common).
Read the prorated rent owed and the daily rate.
Copy the results or download the month table to share with your landlord or tenant.
Prorated rent formulas
Prorated rent = daily rate × days occupied. The three common ways to get the daily rate:
Days in the month: daily rate = monthly rent ÷ days in that month (28–31). Most leases use this.
365-day year: daily rate = monthly rent × 12 ÷ 365. The same daily rate every month.
Banker's month: daily rate = monthly rent ÷ 30, and every month counts as 30 days.
Example: $1,500 rent, moving in on March 20. Days in month: $1,500 ÷ 31 = $48.39 × 12 days = $580.65. 365-day year: $1,500 × 12 ÷ 365 = $49.32 × 12 = $591.78. Banker's: $50.00 × 11 days (20 through 30) = $550.00.
Daily rent by method
Monthly rent
÷ 28 days (Feb)
÷ 30 days
÷ 31 days
× 12 ÷ 365
$800.00
$28.57
$26.67
$25.81
$26.30
$1,000.00
$35.71
$33.33
$32.26
$32.88
$1,200.00
$42.86
$40.00
$38.71
$39.45
$1,500.00
$53.57
$50.00
$48.39
$49.32
$2,000.00
$71.43
$66.67
$64.52
$65.75
$2,500.00
$89.29
$83.33
$80.65
$82.19
$3,000.00
$107.14
$100.00
$96.77
$98.63
Frequently asked questions
How do you calculate prorated rent?
Find the daily rate and multiply it by the days you occupy the unit. With the most common method the daily rate is the monthly rent divided by the number of days in that month. Moving in on June 20 with $1,500 rent: $1,500 ÷ 30 = $50 a day × 11 days (June 20 to 30) = $550.
Which proration method is correct?
Whichever your lease or local law specifies. Days-in-month is the most common. The 365-day method (rent × 12 ÷ 365) gives the same daily rate all year. The banker's method treats every month as 30 days. If the lease is silent, landlord and tenant usually agree on one before move-in.
Is the move-in day counted?
Yes, rent is normally owed for the move-in day. For the move-out day it varies, so the calculator lets you choose whether to count it.
How does the banker's 30-day method handle February and 31-day months?
Every month counts as 30 days. A move-in on February 15 is charged 16 days (15 through 30), and the 31st of a month is treated as the 30th, so moving in on the 31st is charged 1 day.
What if my stay covers more than one month?
Choose the custom range option. Full calendar months are charged at the full monthly rent and only the first and last partial months are prorated.
Is prorated rent required by law?
Rules vary by country, state and city. Many leases simply state how partial months are handled. Check your lease and local tenant rules; this calculator only does the math.
Are my dates or rent stored?
Your last inputs are remembered only in your own browser for convenience. Nothing is uploaded to a server.
Are all the tools on FreeToolCabin tested for quality and accuracy?
Yes! Every tool on our site undergoes automated Q/A testing in real browser environments to ensure high precision, correct output, and zero errors. If you happen to spot a bug or have a suggestion, please contact us at [email protected] and our team will review it right away.