Sample result
$967.74
In Oct 12, 2026 · $1,500 rent · actual days
Calculator
Prorated rent calculator
Rent for a partial month, moving in or out, worked out three ways.
Type the rent, the due date, the day it was paid and the lease’s late fee. You get the days late, the fee, and the math behind it.
Late fee
$75.00
Paid 7 days late on $1,500 rent: a $75.00 late fee, $1,575.00 in all.
A late fee is owed only if the lease sets one. The amount and the grace period come from the lease, within any limits your state sets.
Choose your state above to see its grace period and late-fee cap. State rules
The lease sets the fee; state law can limit it. Not legal advice.
Your numbers, step by step. Days are calendar days; a percentage fee is rounded to the cent once.
Using the amounts on the form, whichever kind your lease uses.
| Fee | Late fee | Total due | Share of rent |
|---|---|---|---|
| Flat $50.00 | $50.00 | $1,550.00 | 3.3% |
| 5% of rent | $75.00 | $1,575.00 | 5.0% |
| $10.00 a day | $70.00 | $1,570.00 | 4.7% |
In most states, yes, if the lease provides for one. Many states also set limits: a cap on the amount, a minimum grace period, or a rule that the fee must be reasonable rather than a penalty.
New York, for example, caps late fees at $50 or 5% of the monthly rent, whichever is less, and allows none until rent is more than 5 days late. This is general information, not legal advice for your state.
Common lease terms are a flat $50 to $100, or 5% to 10% of the monthly rent. On $1,500 rent, 5% is $75.00.
Where a state caps late fees, the cap wins over the lease. Where there is no cap, courts look for a fee that fits the landlord’s real cost of a late payment, not a penalty.
Days after the due date when rent can still be paid without a fee. This calculator counts them after the due date: rent due on the 1st with 5 grace days can be paid through the 6th with no fee.
Some states set a minimum. Massachusetts allows no late fee until rent is 30 days late, and Texas none until rent has gone unpaid two full days after the due date. Leases often give 3 to 5 days where the state sets none.
Often, if the lease says so and the total stays within state limits. A daily fee usually runs from the end of the grace period until the rent is paid, and a well-written lease caps the total.
Some states cap the whole late fee however it is charged, so a daily fee can hit the limit within days. Choose Per day above, with a cap, to see where it lands.
Then there is usually no late fee to charge. A landlord generally can’t add one mid-lease or collect one the lease never mentioned; the lease, or a signed change to it, has to set the fee first.
Late rent still has consequences without a fee: the landlord can typically serve a notice to pay or leave, following the state’s rules.