Prorated Rent Calculator

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Rent is often charged monthly, but when tenants move in or out mid-month, the amount owed needs to be adjusted accordingly. This prorated rent calculator determines the amount of rent to be paid based on the exact number of days a tenant occupies the property during that month.

This calculator helps landlords, property managers, and tenants quickly determine the correct prorated amount.

Simply enter your move-in or move-out date and the monthly rent to see the calculated result instantly. The tool also supports billing cycle calculations for properties that charge rent on a fixed billing day.

This makes it easier to estimate accurate rent payments and avoid manual calculations or billing errors.

How to Calculate Prorated Rent

Calculate the daily rate and multiply it by the number of days the tenant occupies the unit. This ensures both landlords and tenants pay or charge only for the days the property is actually used.

There are several ways to calculate prorated rent depending on the lease agreement or property management policy. The most common methods include the calendar-day method, the 30-day standard method, and billing cycle prorating used by some property management systems.

1. Calendar Days Method (Most Accurate)

The calendar days method calculates rent based on the exact number of days in the month.
This method is commonly used because it reflects the actual length of the month.

Formula:

Daily Rent = Monthly Rent ÷ Days in Month
Prorated Rent = Daily Rent × Number of Occupied Days

Example:

Monthly Rent = $1,200
Days in March = 31
Move-in Date = March 10

Daily Rent = 1200 ÷ 31 = $38.71

Occupied Days = 31 − 10 + 1 = 22 days
Prorated Rent = 38.71 × 22 = $851.62

In this example, the tenant pays $851.62 for the remaining days of March.

2. 30-Day Standard Method

Some landlords use a simplified approach where every month is treated as 30 days. This method makes calculations easier but may slightly differ from the exact calendar calculation.

Formula:

Daily Rent = Monthly Rent ÷ 30
Prorated Rent = Daily Rent × Number of Occupied Days

Example:

Monthly Rent = $1,200
Move-in Date = March 10

Daily Rent = 1200 ÷ 30 = $40
Occupied Days = 22
Prorated Rent = 40 × 22 = $880

Using the 30-day method, the tenant would pay $88.

3. Move-Out Prorated Rent

When a tenant moves out before the end of the month, prorated rent may also be calculated for the days they stayed.

Formula:

Daily Rent = Monthly Rent ÷ Days in Month

Prorated Rent = Daily Rent × Days Occupied

Example:

Monthly Rent = $1,200  

Days in April = 30  

Move-out Date = April 6

Daily Rent = 1200 ÷ 30 = $40

Days Occupied = 6

Prorated Rent = 40 × 6 = $240

In this case, the tenant owes $240 for the final month.

Billing Cycle Method (Bill-On Day)

Some property managers bill rent on a specific day each month rather than the first day.
If a tenant moves in before the next billing cycle, they only pay rent for the days until the next billing date.

Formula:

Daily Rent = Monthly Rent ÷ Days in Month
Prorated Rent = Daily Rent × (Billing Day − Move-In Day)

Example:
Monthly Rent = $1,200
Move-in Date = March 20
Billing Day = March 28

Daily Rent = 1200 ÷ 31 = $38.71
Billable Days = 28 − 20 = 8
Prorated Rent = 38.71 × 8 = $309.68

The tenant pays $309.68 until the next billing cycle begins.

Prorated Rent Examples Using Different Methods

Method	Monthly Rent	Move Date	Days Charged	Prorated Rent
Calendar Days Method	$1,200	Move-in: March 10	22 days	$851.62
30-Day Standard Method	$1,200	Move-in: March 10	22 days	$880
Move-Out Prorating	$1,200	Move-out: April 6	6 days	$240
Billing Cycle Method	$1,200	Move-in: March 20	8 days (until bill day)	$309.68

References:

What is prorated rent