New Hampshire Late Fee Calculator
Your late fee
$62.50
Paid 12 days late; the lease has no grace period.
- Days past due
- 12 days
- Grace period ends
- No grace period
- Earliest fee date
- September 29, 2026
- Lease late fee
- 5% of $1,250.00 = $62.50
- Rent + late fee
- $1,312.50
New Hampshire: RSA 540 and 540-A contains no late fee provision, so there is no legal cap or waiting period to apply; only your lease terms count.
Next step: turn these figures into a late rent notice for the tenant.
Manufactured housing parks in New Hampshire
This applies to manufactured housing park tenancies only: no late fee may be charged when the rent is paid in full within 7 calendar days of the due date.
IV. No manufactured housing park owner or operator shall charge a late fee for any rental payment that is paid in full within 7 calendar days of the due date.
New Hampshire rent late fee law
New Hampshire's Revised Statutes chapters on actions against tenants (540) and on prohibited practices and security deposits (540-A) contain no late fee provision, so neither limits a late rent fee or gives a grace period.
Read in full for this check: New Hampshire Revised Statutes, chapter 540 (Actions Against Tenants) and chapter 540-A (Prohibited Practices and Security Deposits). Copy read on law.justia.com (not the state's official site) · checked .
Late rent notice builder
Before you send it: this builds a reminder letter about overdue rent and a late charge. It is not an eviction notice. A notice to pay rent or quit is a separate document, and New Hampshire has its own rules for it. Nothing on this page is legal advice.
[Your name or company]
Date: October 10, 2026
To: [Tenant name]
[Rental property address]
Re: Overdue rent for [Rental property address]
Dear [Tenant name],
This letter is a reminder that the rent of $1,250.00 for [Rental property address] was due on September 28, 2026. As of October 10, 2026, $1,250.00 of it is still unpaid (12 days past due).
Your lease provides for a late charge, which comes to $62.50.
Amount now due
- Unpaid rent
- $1,250.00
- Late charge
- $62.50
- Total
- $1,312.50
Please pay $1,312.50 at your earliest opportunity.
If this letter crossed with your payment, please disregard it.
Regards,
[Your name or company]
How to use the New Hampshire rent late fee calculator
- Enter the monthly rent and the rent that is overdue.
- Enter the date the rent was due and the date it was paid, or today if it is still unpaid.
- Choose how the lease sets the late fee (percent of rent, flat amount or dollars per day) and type the figure from the lease.
- Enter the grace days written in the lease.
- Read the late fee and the earliest fee date, then copy the figures or print a late rent notice.
Work out interest on an overdue B2B invoice under New Hampshire law. The legal default rate — what applies when the contract is silent — is 10%, and the statute is quoted verbatim below. All math runs locally in your browser.
Rate recovered in litigation (pre- and post-judgment): 26-week T-bill discount rate +2 pts, set annually by the State Treasurer. A fixed 10% residual default applies to business transactions outside that context.
Late fee breakdown
- Interest owed
- —
- Daily rate
- —
- Total (invoice + interest)
- —
Still unpaid? Generate a formal demand letter — it computes the interest and cites New Hampshire's statute (RSA 336:1) for you.
Worked example: New Hampshire invoice interest at 10%
Interest at New Hampshire's statutory default of 10% a year, worked out with the same formula as the calculator above: amount × (10% ÷ 365) × days. If your contract states its own rate, enter that rate in the calculator instead.
| Invoice amount | 30 days late | 60 days late | 90 days late |
|---|---|---|---|
| $1,000.00 | $8.22 | $16.44 | $24.66 |
| $5,000.00 | $41.10 | $82.19 | $123.29 |
| $10,000.00 | $82.19 | $164.38 | $246.58 |
What New Hampshire law says about invoice interest
I. The annual rate of interest in all business transactions in which interest is paid or secured, unless otherwise agreed upon in writing, shall equal 10 percent. No consumer credit transaction, as defined in RSA 358-K:1, V, shall be subject to this paragraph. If agreed upon in writing, interest on business transactions may include charging other than simple interest.
Quoted verbatim from the linked official source — not our paraphrase. How we source and re-check every row is documented in the data methodology.
Maximum late fee in New Hampshire — written B2B contracts
No statutory cap
No numeric usury cap on business transactions agreed in writing; rate limits are reserved for consumer credit. Set the B2B rate in writing.
Basis: RSA 336:1, I. Compare all 51 jurisdictions in the maximum late fee by state table and cap-regime map.
Rent and invoices follow different laws — consumer debt is not covered
The Invoice tab, the rate card and the statute sections on this page are about business-to-business invoices. Residential rent late fees live in New Hampshire's landlord-tenant law. New Hampshire: RSA 540 and 540-A contains no late fee provision, so there is no legal cap or waiting period to apply; only your lease terms count. Consumer credit has separate, stricter rules. The distinction is explained in B2B invoice late fees vs. residential rent.
Use this data
New Hampshire's row — rate, cap, citation, verbatim quote, verification date — is part of our open 51-jurisdiction dataset: CSV · JSON (CC BY 4.0, cite myinvoicetemplate.com). Set late-fee terms on your next invoice with the free invoice generator, or state them clearly using the wording guidance in the payment terms guide.
New Hampshire late fee FAQ
Is there a legal limit on rent late fees in New Hampshire?
New Hampshire's Revised Statutes chapters on actions against tenants (540) and on prohibited practices and security deposits (540-A) contain no late fee provision, so neither limits a late rent fee or gives a grace period. Read in full for this check: New Hampshire Revised Statutes, chapter 540 (Actions Against Tenants) and chapter 540-A (Prohibited Practices and Security Deposits), checked 2026-10-10. The late fee and grace days in the lease decide.
How do I work out a late fee on rent in New Hampshire?
Enter the monthly rent, the overdue amount, the date the rent was due and the date it was paid, then the late fee in the lease (a percent of rent, a flat amount or dollars per day) and its grace days. The calculator gives the late fee, the earliest fee date and rent plus fee, and turns them into a late rent notice.
Can I charge late fees on overdue invoices in New Hampshire?
Yes — on business-to-business invoices. If your contract or invoice states a late-fee rate, that rate governs (subject to the cap rules below). If nothing was agreed: 10%. Rate recovered in litigation (pre- and post-judgment): 26-week T-bill discount rate +2 pts, set annually by the State Treasurer. A fixed 10% residual default applies to business transactions outside that context. Statute: RSA 336:1, verified 2026-08-21. Consumer and rent debts follow separate laws.
What is the maximum late fee on a B2B invoice in New Hampshire?
For a written B2B contract: No cap for business transactions agreed in writing (consumer credit is the only carve-out). Basis: RSA 336:1, I. The full cap analysis is on the Invoice (B2B) tab; this covers business-to-business deals only — consumer credit has stricter separate caps.
What interest applies if my contract doesn't mention late fees in New Hampshire?
The statutory default rate of 10%. Rate recovered in litigation (pre- and post-judgment): 26-week T-bill discount rate +2 pts, set annually by the State Treasurer. A fixed 10% residual default applies to business transactions outside that context. Statute: RSA 336:1 (verbatim quote on this page, verified 2026-08-21).
Where does this data come from, and when was it verified?
Every invoice-interest figure on this page comes from our 51-jurisdiction dataset: each row researched against the controlling statute or the state's official current-rate page, independently re-checked, and stamped with its own verification date — New Hampshire's row was last verified 2026-08-21. The operative legal text is quoted verbatim on this page with a link to the official source, the methodology is public, every verification pass is logged in the changelog, and the full dataset is downloadable (CC BY 4.0).
Not legal advice. This page summarizes New Hampshire's commercial-interest statute for general information, with the verification date shown above — it tells you when we last confirmed the figures, not that they are still current today. Statutes change and courts interpret them; verify the cited statute at the official source, or ask a licensed attorney in your state, before charging a late fee or demanding interest.