Check two numbers in your state’s statute before you charge anybody anything: the earliest day a fee may be imposed, and the most it may be. Get either one wrong and you are charging a fee your own state does not allow.
Seven states are quoted below from their own statutes. If yours is not among them, the last section is the method for finding the answer yourself in a few minutes.
Tell a fee cap apart from a grace period
These are two separate rules, and states set them independently.
A grace period is the delay before a fee may be charged at all. Massachusetts sets the longest one in the country: no lease may impose any interest or penalty for late rent until thirty days after the rent was due (M.G.L. c. 186 § 15B(1)(c)). Washington sets a short one and no cap at all: no late fee for rent paid within five days of its due date (Wash. Rev. Code § 59.18.170).
A cap is the ceiling on the amount. Maine caps the penalty at 4 percent of one month’s rent (14 M.R.S. § 6028). Nevada caps it at 5 percent of the periodic rent (Nev. Rev. Stat. § 118A.210(4)).
A state can have one, both, or neither. California has neither, which does not mean any number is fine, as the section below explains.
Seven states, from the statute
| State | Earliest a fee may be charged | Cap | Statute |
|---|---|---|---|
| California | No statutory grace period | No statutory cap, but the fee must be a reasonable estimate of the landlord’s actual costs | Civ. Code § 1671(d) |
| Maine | Rent is late 15 days after it is due | 4 percent of one month’s rent, and only if the rental agreement disclosed it | 14 M.R.S. § 6028 |
| Massachusetts | 30 days after the rent was due | No cap stated | M.G.L. c. 186 § 15B(1)(c) |
| Nevada | At least 3 calendar days after the due date | 5 percent of the periodic rent, and the cap does not grow because a previous fee went unpaid | NRS § 118A.210(4) |
| North Carolina | 5 calendar days or more late, counting from the day after rent was due | The greater of $15 or 5 percent of the monthly rent, once per late payment | N.C.G.S. § 42-46 |
| Oregon | Rent not received by the fourth day of the rental period | A reasonable flat fee once per period, or 5 percent of the rent once per each following 5 day period, or a daily fee no greater than 6 percent of the reasonable flat amount | ORS § 90.260 |
| Washington | 5 days after the due date | No cap stated | RCW § 59.18.170 |
Every row was read from the state’s own legislative site in September 2026. Statutes change. Re-check yours before you rely on a row here.
Three details in that table cause most of the trouble. Maine’s cap only applies if the agreement said so when it was signed, so a landlord who charges 4 percent under a silent lease has no fee. North Carolina allows the fee once per late payment, which rules out a fee that repeats monthly on the same unpaid rent. Oregon lets you pick a structure but not stack them.
Read your own state’s late fee rule from the statute
Four steps, and they work in any state.
- Find the landlord-tenant chapter on the state legislature’s own site. Search for the state name plus “residential landlord tenant act” and take the .gov result. Summaries on rental blogs go stale quietly; statutes carry a date.
- Search the chapter for “late.” The rule is usually in the section on rent, on prohibited provisions, or on fees. Read the whole section, not the first sentence.
- Write down four things: the grace period, the cap, whether the fee may repeat, and whether the lease has to disclose it in advance.
- Check the city. Some local ordinances add a grace period the state does not require, and eviction protections often interact with fees.
If your state’s statute is silent on all four, you are in the same position as a California landlord, and the next section is the one that matters.
Set a defensible fee in a state with no cap
Silence in the statute is not permission. California treats a late fee in a residential lease as liquidated damages, and under Civ. Code § 1671(d) that kind of clause is void unless fixing the actual damage would be impracticable or extremely difficult, and the amount agreed on is a reasonable pre-estimate of it.
Read plainly, that means the fee has to approximate what a late payment actually costs you: the time chasing it, the bookkeeping, any bank or financing consequence. It is not a penalty, and it is not a revenue line.
What to do about that in practice:
- Pick a modest flat amount, or a small percentage of the rent. A number in single-digit percentage territory is defended more easily than a large one.
- Cap it. A percentage with no ceiling on a large unit produces a fee nobody will call reasonable.
- Charge it once. A fee that compounds daily on unpaid rent stops looking like a cost estimate and starts looking like a penalty, which is the thing § 1671(d) is aimed at.
- Write down how you picked the number and keep the note. If the fee is ever challenged, the question is what you estimated and why.
This is general information, not legal advice. Rules change and local ordinances vary. Confirm current requirements with your city, county, or an attorney before you act.
Write the policy into the lease and apply it the same way every month
Maine is explicit about this: no penalty may be assessed unless the landlord gave the tenant written notice of it when they entered into the rental agreement (14 M.R.S. § 6028). Writing the fee into the lease is the ordinary way to satisfy a rule like that. The clause needs the amount, the day it starts, whether it repeats, and nothing else.
Then apply it identically. Charging a fee to one tenant and waiving it for another, with no written rule behind the difference, is hard to explain to the tenant who paid it and harder to explain to anyone who asks later. Set the rule once, at the company level, and let it run.
Two neighbors to this policy are worth setting at the same time. Rent grace periods explained covers the day-count half of the decision in more depth, and how to write a late rent notice covers what you send when the fee has not solved the problem. Deposits follow the same read-the-statute-yourself pattern: see security deposit limits by state.
Late fees also stop being the right tool at some point. When rent is weeks late rather than days, the question moves to notice, and in California that is a three-day notice to pay or quit with its own strict rules: California eviction notice requirements covers them. Automating the fee itself is covered in automating rent reminders and late fees, and the charge itself rides on rent payments.