Prorated Rent Calculator

Calculate a partial month of rent for a mid-month move-in or move-out. Enter the monthly rent and the date, and choose how the daily rate is figured.
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How this is calculated

Proration splits a month's rent by the days a tenant actually occupies the unit:

Daily rate = Monthly rent ÷ Days in period

Prorated rent = Daily rate × Days charged

Two common conventions exist for the denominator. The days-in-month method divides by the actual number of days that month (28–31). The 30-day (banker's) method always divides by 30. For a move-in, the tenant is charged from the move-in day through month end; for a move-out, from the 1st through the move-out day. Your lease should state which method applies.

Worked example

Rent is $2,000 and the tenant moves in on the 15th of a 30-day month. Using the days-in-month method, the daily rate is $2,000 ÷ 30 = $66.67, and the tenant occupies 16 days (the 15th through the 30th). Prorated rent = $66.67 × 16 = $1,066.67.

Frequently asked questions

Which proration method should I use?

Use whatever your lease specifies. If it is silent, the actual days-in-month method is the most common and defensible; some states or leases require it.

Is the move-in day counted?

Yes. For a move-in, the tenant typically pays from the move-in day through the last day of the month, inclusive.

Does this handle move-outs too?

Yes. Switch the scenario to move-out and it charges from the 1st through the move-out day.

Is prorated rent legally required?

Rules vary by jurisdiction, and some leases address it directly. This tool computes the math; confirm the method and any local requirements before billing.

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This calculator is for informational purposes only and does not constitute legal advice. Proration methods and requirements vary by lease and jurisdiction. Confirm the method that applies to your tenancy before billing rent.