Oklahoma Late Fee Calculator

No cap no late fee section in the law we read
Rent limit
None in 41 O.S.
Earliest fee day
–
Statute
41 O.S.
Checked
What was not paid on time. Copies the rent until you type here.
How the lease sets the late fee
How many days the lease gives before a late fee; 0 if none.

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
October 20, 2026
Lease late fee
5% of $1,250.00 = $62.50
Rent + late fee
$1,312.50

Oklahoma: 41 O.S. contains no late fee provision, so there is no legal cap or waiting period to apply; only your lease terms count.

Late rent notice builder

Who it is from and to
Amounts
Taken from the calculator. Set 0 if the rent itself is paid.
Taken from the result; you may change it.
Adds the two above until you type your own figure.
Blank: the letter asks for payment at the earliest opportunity.
Payment and contact
Where and how the tenant can pay.
Late rent notice

[Your name or company]

Date: October 31, 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 October 19, 2026. As of October 31, 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]

6% legal default rate (contract silent)
Max written B2B rate
10% constitutional ceiling as the residual rule; statutes authorize higher rates for various licensed/consumer lending regimes.
Cap regime
Hard cap — 10% (constitutional)
Statute
15 O.S. § 266; Okla. Const. art. XIV, § 2
Verified
— how we verify · changelog

Legal rate absent a contract rate; liquidated sums earn interest from the day the right to recover vested.

Pre-filled with Oklahoma's statutory default (6%), which governs only when the contract names no rate; a rate stated in your contract replaces it.

Interest at 6% a year

Interest owed on an overdue invoice in Oklahoma at 6% per year
Invoice amount30 days late60 days late90 days late
$1,000.00$4.93$9.86$14.79
$5,000.00$24.66$49.32$73.97
$10,000.00$49.32$98.63$147.95

Maximum late fee in Oklahoma — written B2B contracts

Hard cap 10% (constitutional).

Basis: Okla. Const. art. XIV §2; 15 O.S. §266.

About this page

Oklahoma rent late fee law

Oklahoma's title 41 on landlords and tenants, which contains its Residential Landlord and Tenant Act, has no late fee provision, so it neither caps a late rent fee nor gives a grace period.

Read in full for this check: Oklahoma Statutes, title 41 (Landlord and Tenant), including the Oklahoma Residential Landlord and Tenant Act (41 O.S. sections 101 to 136). Official source · checked .

Before you send the late rent notice: it is a reminder letter about overdue rent and a late charge, not an eviction notice. A notice to pay rent or quit is a separate document, and Oklahoma has its own rules for it. Nothing on this page is legal advice.

What Oklahoma law says about invoice interest

[...] in the absence of legislation fixing maximum rates of interest, all contracts for a greater rate of interest than ten percent(10%) per annum shall be deemed usurious; provided, further, that in contracts where no rate of interest is agreed upon, the rate shall not exceed six percent (6%) per annum.
— Okla. Const. art. XIV, § 2. Read it at the official source · row verified 2026-08-21.

10%/yr constitutional ceiling is the residual rule for ordinary B2B contracts; no blanket business exemption. Higher rates need a specific statute (licensed/consumer regimes).

Not legal advice. Figures were last verified on the date shown; check the cited statute before charging a late fee.