Tenants rarely move in or out on the 1st. Enter the monthly rent, the dates, and your proration method — this calculator works out the exact partial-month amount due, with the daily rate shown so both you and the tenant can see the math.
Actual-days divides the rent by the real number of days in the month (28–31). The 30-day method divides by 30 regardless — some leases specify this; use whichever your lease says.
Tips: put the proration method in the lease so move-in math is never an argument — "prorated using actual days in the month" is the most tenant-friendly wording. Collect the prorated amount at move-in along with the deposit, not at the first of the next month. If the lease is silent and state law doesn't specify, actual-days is the defensible default. See the deposit deduction letter generator for the other end of the tenancy.
Collect the prorated amount online
Send the prorated total through online rent collection and it’s documented automatically — no math disputes at move-in.
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Put the proration in the lease
The math is easy; the disputes come from undocumented agreements. Have an attorney review your lease’s proration clause — Rocket Lawyer legal plans are 40% off through our link.