Real estate & rental
Rental Rent Proration Calculator
Prorated rent for a partial month, by the three methods landlords actually use.
Result
Tenancy rules are set by state and often by city, and they are among the most locally variable areas of law there is. Deposit limits, notice periods, late fee caps, interest on deposits and rent increase restrictions all differ and change. This is arithmetic, not legal advice; check your own jurisdiction before relying on any of it. The three methods differ by a few dollars, which matters less than being consistent and having the method written into the lease. Some jurisdictions specify which must be used.
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About this calculator
Which method is correct?
Whichever the lease specifies. Where it is silent, actual days in the month is the most defensible because it reflects the period the tenant actually had.
Why do February and July differ?
Because a daily rate based on actual days makes each day of February worth more than each day of July. The 30 day method removes that variation, which is why some landlords prefer it.
The formula
actual: rent / days in month x days occupied; 30 day: rent / 30 x days; annual: rent x 12 / 365 x days
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