Late Rent Fee Calculator
Late fee and total due from rent, days late, and lease terms.
What it does
Late rent math is a lease term plus calendar days. Most leases charge either a percent of rent, a daily amount, or both, and the count starts after the due date or grace date. This page adds those two slices so both sides see the same total.
The defaults show a common shape: $1,500 rent with a 5% term and $10 per day for 7 days. The percent gives $75, the days give $70, and the fee lands at $145.00 with $1,645.00 due. Zero either input to model a lease that uses only one side.
Grace periods and caps matter more than the arithmetic. Many leases allow a few days before any fee, and many states limit fees to a fair share of actual harm. Read those clauses before paying, since this tool cannot read your lease.
Use the result as a check, not a ruling. If the lease and the tool differ, the signed lease plus local law controls.
How to use
- Enter the monthly rent.
- Enter days past due (0 if on time).
- Enter the lease percent term.
- Enter the daily charge (0 if the lease has none).
- Read the fee first, then the total due.
Formula
- rent
- Monthly rent in dollars.
- days
- Days past the due or grace date.
- pct
- Lease percent applied once to rent.
- daily
- Dollars added per late day.
Leases vary: some use a flat percent only, some a daily charge only, this page adds both so either side can be zeroed. Grace days, caps, and notice rules come from the lease and local law and are not modeled here.
Worked example
Example: $1,500 rent, 7 days late
Rent $1,500, 7 days late, 5% late term, $10 per day.
- Percent slice: 1,500 x 5 / 100 = $75.00.
- Daily slice: 10 x 7 = $70.00.
- Fee: 75 + 70 = $145.00.
- Total: 1,500 + 145 = $1,645.00.
- Tool shows $145.00 fee and $1,645.00 due on $1,500.00 rent.
Reference table
| Terms | Fee at 7 days | Total |
|---|---|---|
| 5% only | $75.00 | $1,575.00 |
| $10/day only | $70.00 | $1,570.00 |
| 5% plus $10/day | $145.00 | $1,645.00 |
| 3% plus $5/day | $80.00 | $1,580.00 |
| 0 days, any terms | $0.00 | $1,500.00 |
Limits
- Models one lease shape only. Flat fees need the daily side set to fit.
- Ignores grace day logic. Days entered should be past grace.
- Ignores caps, interest, and legal costs.
- Local law can void or cut fees this page still adds.
Common mistakes
- Counting grace days as late days.
- Applying the percent to the total instead of rent.
- Forgetting to zero the unused side (percent or daily).
- Mixing percent points with dollar amounts.
- Assuming the tool overrules the lease.
Try it yourself
Quick checks. Answers sit tucked under each question.
Rent $1,200, 5 days, 5%, $10 per day?
Fee $110.00 (60 + 50), total $1,310.00.
Rent $2,000 paid on time?
Fee $0.00, total $2,000.00.
Questions
How is the fee figured?
Add the percent slice to the daily slice. At 1,500 with 5% and $10 per day for 7 days the fee is $145.00.
What is the total due?
Rent plus fee. Here $1,500.00 plus $145.00 is $1,645.00.
What if I pay on time?
With 0 days the fee is $0 and the due equals rent.
What is a grace period?
Many leases give 3 to 5 days. Fees start after the grace date, per the lease and local law.
Are late fees limited by law?
Often yes. Many states cap fees or tie them to actual harm, so read the lease and local rules.
Does this include interest?
No. This page adds the lease fee only. Interest, court costs, and notices sit outside it.