Prorated Rent Calculator
Moving in or out mid-month? Calculate exactly how much rent you owe based on the precise number of calendar days.
Rent & Move Type
Enter your full monthly rent and tell us if you're moving in or out.
How Does It Work?
Enter Your Rent
Your full monthly rent and whether you're moving in or out.
Pick Your Date
The exact date you're moving in or out.
Get Your Amount
We calculate the daily rate and show exactly what you owe.
Why Prorated Rent Matters
How Prorated Rent Is Calculated
Prorated rent is the portion of a full month's rent you owe when you move in or out mid-month. Instead of paying the full monthly amount, you pay only for the days you actually occupy the unit. There are two standard methods for calculating prorated rent, and the one your landlord uses can change the amount you owe by several dollars.
Calendar-Day Method (Recommended): This method divides your monthly rent by the actual number of days in the specific month, then multiplies by the number of days you'll occupy the unit. Because months vary in length (28–31 days), this method gives the most precise result. It's the most commonly used method and the one our calculator defaults to.
Banker's Method (30-Day): This method divides your monthly rent by 30 regardless of the actual month length. It's simpler but less precise — it slightly overcharges you in shorter months (February) and slightly undercharges in longer months (31-day months). Some landlords and property management software use this method for convenience.
In most states, there is no statute mandating which method a landlord must use. If your lease specifies a proration method, that method controls. If the lease is silent, the calendar-day method is generally considered more fair and is what most courts would apply if disputed.
Example: March 15 Move-In
Your monthly rent is $3,100 and you move in on March 15. How much rent do you owe for March?
Calendar-Day Method
Banker's Method (30-Day)
The banker's method overcharges you by $56.67 in this scenario because it assumes a 30-day month when March actually has 31 days.
Frequently Asked Questions
Which proration method should my landlord use? ▼
Most landlords use the calendar-day method, which divides your rent by the actual number of days in the month. This is more precise and generally considered more fair. If your lease specifies a method, that controls. If the lease is silent, the calendar-day method is the standard. Our calculator shows both methods so you can compare.
Does prorated rent work the same way for move-out? ▼
Yes. If you move out mid-month, you owe rent only for the days you occupied the unit. The calculation is the same: divide your monthly rent by the number of days in the month, then multiply by the number of days through your move-out date (inclusive). For example, moving out on the 10th of a 30-day month means you owe 10/30 of the monthly rent.
Is the move-in day counted as an occupied day? ▼
Yes. The day you move in is generally counted as your first day of occupancy, and you owe rent for that day. Similarly, your move-out day is typically your last day of occupancy. So if you move in on the 15th, you owe rent for the 15th through the end of the month.
What if my lease specifies a different proration method? ▼
If your lease specifies a proration method (e.g., "prorated rent will be calculated using a 30-day month"), that method generally controls regardless of what a calculator shows. Review your lease terms before disputing an amount. If no method is specified, the calendar-day method is the standard in most jurisdictions.
Can my landlord refuse to prorate rent for a mid-month move-in? ▼
In most cases, if your lease start date is mid-month, the landlord should only charge for the days you occupy the unit. However, some leases may require you to pay a full month's rent at signing regardless of the move-in date. Read your lease carefully — if it says "rent begins on the 1st regardless of move-in date," you may owe the full amount. If the lease says nothing about proration, you generally owe only for the days you occupy.
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