Hawaii Late Fee Calculator
Your late fee
$100.00
At the legal limit
Paid 12 days late; the lease has no grace period.
The lease asks for $100.00, exactly the most HRS § 521-21(f) permits on these figures.
- Days past due
- 12 days
- Grace period ends
- No grace period
- Earliest fee date
- September 29, 2026
- Lease late fee
- 8% of $1,250.00 = $100.00
- Legal maximum
- $100.00
- Rent + late fee
- $1,350.00
Limit set by Hawaii (8% of the monthly rent): $100.00
8% × $1,250.00 monthly rent = $100.00
Next step: turn these figures into a late rent notice for the tenant.
Hawaii rent late fee law
Hawaii: if the rental agreement provides for a late charge on rent not paid when due, that charge can be at most 8% of the rent due.
(f) Where the rental agreement provides for a late charge payable to the landlord for rent not paid when due, the late charge shall not exceed eight per cent of the amount of rent due.
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 Hawaii 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 $100.00.
Amount now due
- Unpaid rent
- $1,250.00
- Late charge
- $100.00
- Total
- $1,350.00
Please pay $1,350.00 at your earliest opportunity.
If this letter crossed with your payment, please disregard it.
Regards,
[Your name or company]
How to use the Hawaii 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, the earliest fee date and the most HRS § 521-21(f) allows, then copy the figures or print a late rent notice.
Work out interest on an overdue B2B invoice under Hawaii 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.
Legal rate when there is no express written contract fixing a different rate.
Late fee breakdown
- Interest owed
- —
- Daily rate
- —
- Total (invoice + interest)
- —
Still unpaid? Generate a formal demand letter — it computes the interest and cites Hawaii's statute (HRS §§ 478-2, 478-4(c)) for you.
Worked example: Hawaii invoice interest at 10%
Interest at Hawaii'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 Hawaii law says about invoice interest
When there is no express written contract fixing a different rate of interest, interest shall be allowed at the rate of ten per cent a year [...] With respect to any transaction other than a consumer credit transaction, a home business loan, or a credit card agreement, it shall be lawful to stipulate by written contract for any rate of interest not otherwise prohibited by law.
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 Hawaii — written B2B contracts
No statutory cap
No ceiling for non-consumer deals: any rate may be set by written contract. A B2B invoice is neither consumer credit nor a home loan, so it is uncapped.
Basis: HRS §§ 478-4(c), 478-8. 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 Hawaii's landlord-tenant law. On the Rent tab, HRS § 521-21(f) is checked against your lease figures and quoted in full. Consumer credit has separate, stricter rules. For the rent rule, see Hawaii rent late fee law; the general distinction is explained in B2B invoice late fees vs. residential rent.
Use this data
Hawaii'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.
Hawaii late fee FAQ
Is there a legal limit on rent late fees in Hawaii?
Hawaii: if the rental agreement provides for a late charge on rent not paid when due, that charge can be at most 8% of the rent due. Source: HRS § 521-21(f), checked 2026-09-25; the Rent tab quotes it word for word. Hawaii rent late fee law →
How do I work out a late fee on rent in Hawaii?
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, the most HRS § 521-21(f) allows and rent plus fee, and turns them into a late rent notice.
Can I charge late fees on overdue invoices in Hawaii?
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%. Legal rate when there is no express written contract fixing a different rate. Statute: HRS §§ 478-2, 478-4(c), verified 2026-08-19. Consumer and rent debts follow separate laws.
What is the maximum late fee on a B2B invoice in Hawaii?
For a written B2B contract: No cap for non-consumer transactions — any rate may be stipulated by written contract. Basis: HRS §§ 478-4(c), 478-8. 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 Hawaii?
The statutory default rate of 10%. Legal rate when there is no express written contract fixing a different rate. Statute: HRS §§ 478-2, 478-4(c) (verbatim quote on this page, verified 2026-08-19).
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 — Hawaii's row was last verified 2026-08-19. 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). For rent, the Rent tab quotes HRS § 521-21(f) word for word, links its source and gives the date it was checked (2026-09-25).
Not legal advice. This page summarizes HRS § 521-21(f) and Hawaii'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.