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Late Fee Cap Calculator
Late fees are one of the most-litigated parts of residential leases. Many states cap them as a % of rent, a flat dollar maximum, or require a minimum grace period. Charging more than the cap makes the fee unenforceable — and in some states, triggers statutory damages. This calculator compares your proposed fee against the common caps so you know what will actually hold up.
Fee enforceable as proposed
No
Maximum legal fee
$50
Proposed fee
$200
Amount over cap
$150
% cap amount
$100
Cap test passed
No
Grace period test passed
No
How the math works
Two tests have to pass: the fee ≤ state cap (usually 5-10% of rent or a flat dollar ceiling), and the grace period ≥ statutory minimum. Either one failing makes the fee unenforceable in court — and exposes you to refund plus penalty suits. If you're unsure of your state's rule, assume the strictest (5% of rent, 5-day grace) — it'll be enforceable almost everywhere.
Write your lease fee as 'the lesser of X% of monthly rent or $Y' and include the grace language explicitly. Keep a copy of your state's landlord-tenant code handy; caps change with legislative sessions, so re-check annually.
How to Use
- Enter monthly rent and the late fee you want to charge (flat or % of rent).
- Enter the grace period you offer (days rent is late before the fee applies).
- Set the state cap: the common caps are 5%, 8%, 10%, or a flat $50-$75. Use your state's rule.
- The calculator shows the maximum legally chargeable fee and whether your proposed fee is enforceable.
Frequently Asked Questions
What are common state caps?
CA reasonable fee only (case law roughly 4-6% of rent); NJ 5%; NY 5% or $50 whichever is less after 5-day grace; TX 12% for ≤2-unit buildings / 10% >2 units; WA $20 or 20% of rent whichever is greater after 5-day grace; FL no specific cap but must be 'reasonable'; NC 5% (flat $15 minimum).
Is a grace period required?
Yes in many states — NY, NJ, NC, MA, and MD require 5-15 days. Charging a late fee on day 1 in those states makes the fee unenforceable. Even in states without a statutory grace period, industry standard is 3-5 days and courts view anything shorter as 'unreasonable' in disputes.
Can I charge a daily late fee after the one-time fee?
Risky. Most states treat compounding daily late fees as a disguised interest charge subject to usury caps. Safer: one flat or one-time percentage late fee, plus a separate NSF fee if the check bounces. Avoid $10/day compounding structures unless your state statute expressly allows them.
What if my lease says more than the cap?
The lease provision is unenforceable to the extent it exceeds the cap. Tenants who've paid over the cap can sue for the excess plus (in some states) treble damages and attorney fees. Fix the lease language; refund any overcharge.
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