About the Prorated Rent Calculator
This prorated rent calculator works out how much rent is owed for a partial month when you move in or out partway through. Enter the monthly rent and the move date, choose whether you are moving in or out, and it calculates the daily rate, the number of days you are charged for and the prorated amount.
Landlords use three common methods, and they give slightly different answers. The most common divides the rent by the actual number of days in that month. The yearly method multiplies the rent by 12 and divides by 365, giving the same daily rate in every month. The banker’s method assumes every month has 30 days. Check your lease — it often says which method applies — and compare all three in the table.
For a move-in, the calculator counts the move-in day through the last day of the month. For a move-out, it counts from the 1st through the move-out day. Both include the move date itself, which is how most leases charge.
With the default inputs, the prorated rent is $1,140.00. Change any value above to recalculate instantly.
How to use the prorated rent calculator
- 1Enter the full monthly rent.
- 2Pick the move-in or move-out date.
- 3Choose whether you are moving in or out.
- 4Select the proration method your lease uses (or compare all three).
- 5Read the prorated rent, daily rate and days charged.
Formula and method
Proration charges you only for the days you occupy the home. First a daily rate is set from the monthly rent R: dividing by the actual days D in that month (most common), spreading a year of rent over 365 days, or using a fixed 30-day "banker’s" month. The daily rate is then multiplied by the number of days you are responsible for.
Days charged include the move date: a move-in on the 12th of a 30-day month is charged for 19 days (12th–30th) and a move-out on the 12th for 12 days (1st–12th). The prorated amount is capped at one full month’s rent, which matters for the 30-day method in 31-day months.
- R
- Monthly rent
- D
- Number of days in the move month (28–31)
Worked examples
Moving in on November 12, $1,800 rent
November has 30 days, so the daily rate is $1,800 ÷ 30 = $60. Moving in on the 12th means paying for the 12th through the 30th — 19 days — for a prorated rent of $1,140, which is $660 less than a full month.
Moving out on January 20, yearly method
The yearly method sets a daily rate of $2,100 × 12 ÷ 365 ≈ $69.04. A January 20 move-out covers the 1st–20th, or 20 days, so the prorated rent is about $1,380.82.
Move-in February 15 with first full month due
February 2027 has 28 days, so rent is $53.57 a day. The 15th–28th is 14 days, exactly half the month: $750. Adding March’s full $1,500 rent brings the move-in total to $2,250.
Frequently asked questions
How do you calculate prorated rent?+
Divide the monthly rent by the number of days in the month to get a daily rate, then multiply by the number of days you will live there that month. For $1,800 rent in a 30-day month, moving in on the 12th costs $60 × 19 days = $1,140.
Is the move-in day included in prorated rent?+
Usually yes. Most leases charge rent for the day you get the keys, so a move-in on the 12th counts the 12th as the first day. If your lease starts the day after, subtract one day.
Which proration method is most common?+
Dividing by the actual number of days in the month is the most widely used. Some property managers use a 365-day year so the daily rate is the same every month, and a few use a 30-day month. Your lease should specify.
Does a landlord have to prorate rent?+
It depends on the lease and local law. Many leases require a full month’s rent regardless of move date, while others prorate. Some jurisdictions require proration when a tenancy ends, so check your local tenant rules.
When is prorated rent paid?+
For a mid-month move-in it is normally paid at signing or with the first full month’s rent. Some landlords instead add the prorated amount to the second month’s payment.