What prorated rent means
“Prorated” means divided in proportion. If a lease starts on the 20th, the tenant pays for the 20th through the end of the month, not the whole month — then full rent from the 1st. The same happens in reverse when a stay ends mid-month.
Three ways to figure it
| Topic | Daily rate | Rent for October 20–31 |
|---|---|---|
| Actual days in the month | $3,000 ÷ 31 | $1,161.29 |
| A 30-day month | $3,000 ÷ 30 | $1,200.00 |
| A 365-day year | $3,000 × 12 ÷ 365 | $1,183.56 |
No law sets a single day count; the lease decides. Some statutes set a default — Arizona’s, for example, says “unless otherwise agreed, rent shall be uniformly apportionable from day-to-day.” Run your own dates in the free prorated rent calculator, which shows all three side by side.
Why it matters for mid-term stays
A midterm or medium-term stay of two to six months usually starts and ends mid-month, so it has two prorated months — and an extension moves the second one. In Nexxus, rent for the whole stay is scheduled when the lease is signed, with partial months prorated by the day; change the end date and the months adjust. See mid-term rental software, or open the live demo set up for mid-term, no sign-up.
Related terms
- Lease extension — moving a lease’s end date, and its last prorated month. See lease extension.
- Security deposit — the other money due at move-in. See security deposit.
- Corporate lease — when a company pays the rent, prorated months show on its invoice. See corporate lease.
Prorated rent FAQ
When prorating rent, do you use 30 or 31 days?
Either can be right — it depends on the method your lease names. The actual-days method divides by the days in that calendar month (28 to 31), a 30-day method always divides by 30, and a yearly method uses 12 months over 365 days. Pick one, write it in the lease, and use it every time.
How do you calculate prorated rent?
Find the daily rate, then multiply by the days the tenant has the home. With the actual-days method, $3,000 rent for a move-in on October 20 is $3,000 ÷ 31 × 12 days = $1,161.29. The free prorated rent calculator shows all three methods side by side.
Do landlords have to prorate rent?
It depends on the lease and your state’s law. Arizona’s landlord-tenant act, for example, says that unless otherwise agreed, rent is apportionable from day to day. Many leases charge a partial first month so rent falls due on the 1st afterwards; others start the rent cycle on the move-in date. Check your state’s rules with a landlord-tenant attorney; this is general information, not legal advice.
Is prorated rent paid at move-in?
Usually. A common pattern is the prorated first month at move-in, then full rent on the 1st of each month, with the last month prorated to the move-out date. The lease should say when each payment is due.
Sources
- Arizona Revised Statutes 33-1314 (terms and conditions of the rental agreement; subsection C, rent apportionable day to day), read October 6, 2026