How to Calculate Prorated Rent — Free Online Proration Calculator
To calculate prorated rent for a move-in: select the Move-In tab, enter your Monthly Rent amount, pick your Move-in Date using the calendar, and choose a Proration Method. The calculator instantly shows your prorated rent — the amount you owe for the remaining days of the month. It also displays the daily rate, the number of days remaining, and the exact formula used. For example, with $1,500 rent and a January 15 move-in using actual days, you'd pay $1,500 ÷ 31 × 17 = $822.58.
To calculate prorated rent for a move-out: switch to the Move-Out tab, enter your Monthly Rent, select your Move-out Date, and choose a Proration Method. The calculator shows how much rent you owe for the days you occupied the unit. This is useful when terminating a lease mid-month — you only pay for the days you actually lived in the property.
Why Use This Free Prorated Rent Calculator?
- Calculate exact prorated rent for any move-in or move-out date in seconds
- Three proration methods — actual days, 30-day, and 365-day — to match your lease terms
- Shows daily rate, days counted, and the complete formula so both tenants and landlords can verify
- Automatically accounts for different month lengths including February and leap years
- 100% browser-based — your rental information never leaves your device or touches any server
- Useful for tenants, landlords, property managers, and real estate professionals
- Completely free with no rate limits, no account, and no installation required
Frequently Asked Questions
What is prorated rent?
Prorated rent is a partial month's rent calculated based on the number of days you actually occupy a rental unit during an incomplete month. Instead of paying the full monthly rent when you move in on the 15th, for example, you only pay for the remaining days of that month. Proration works the same way when moving out mid-month — you pay only for the days you lived there. Rent proration is standard practice in the U.S. rental market and is typically required by state landlord-tenant laws. The specific proration method should be spelled out in your lease agreement.
Which proration method is most common?
The most common method is the Actual Days method, where the daily rate equals the monthly rent divided by the actual number of days in that specific month (28, 29, 30, or 31). This method is the most mathematically accurate and is the default in most residential leases. The 30-Day method (monthly rent ÷ 30) is used by some landlords for simplicity, while the 365-Day Annual method (monthly rent × 12 ÷ 365) produces a consistent daily rate regardless of the month and is preferred by some commercial property managers. Always check your lease to confirm which method applies to you.
Is my landlord required to prorate rent?
In most U.S. states, landlords are required to prorate rent when a tenant moves in or out mid-month. However, the specific rules vary by state and by the terms of your lease. Some leases may specify that rent is not prorated, or that a full month's rent is due regardless of the move-in date. If your lease is silent on proration, state landlord-tenant law generally defaults to requiring proration for mid-month moves. For definitive guidance, consult your lease agreement and your state's tenant rights resources.
Does the move-in day count as a day I pay rent for?
Yes, in standard practice the move-in day is included in the proration calculation. If you move in on January 15, you are charged for January 15 through January 31 — that's 17 days. Similarly, for move-outs, the move-out day is typically included as a day you pay for. This calculator follows this standard convention: for move-ins, it counts from the move-in date through the end of the month (inclusive), and for move-outs, it counts from the 1st through the move-out date (inclusive).
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