A plain-English guide | Reams Law | November 2026

You did the work. You delivered the materials. The invoice is past due, the general contractor has stopped returning calls, and the owner says they already paid the GC. If you are a subcontractor, supplier, or contractor on an Oklahoma project, your best protection is usually a mechanic’s lien — but only if you file it correctly and on time.

Oklahoma’s lien statute (Title 42, Sections 141 and following) is unforgiving. Miss a notice or a filing deadline by a single day and the lien can be lost entirely, no matter how much you are owed. Here are the Oklahoma mechanic’s lien deadlines every contractor, subcontractor, and supplier should know.

The deadlines at a glance

• Pre-lien notice (subcontractors and suppliers): within 75 days after you last furnished labor or materials, when required (see below). 42 O.S. § 142.6.
• Lien statement — subcontractors and suppliers: within 90 days after you last furnished labor or materials. 42 O.S. § 143.
• Lien statement — original (prime) contractors: within 4 months after you last furnished labor or materials. 42 O.S. § 142.
• Lawsuit to enforce (foreclose) the lien: within 1 year after the lien statement is filed. 42 O.S. § 172.

The clock usually runs from the last day you furnished labor or materials — not the invoice date, not the date the job was finished, and not the date you realized you would not be paid. Warranty or punch-list visits often do not restart the clock.

When a pre-lien notice is required

Oklahoma requires subcontractors and suppliers to send a pre-lien notice in two situations:

• On owner-occupied residential projects, regardless of the amount; and
• On other projects, when the amount claimed is more than $10,000.

The notice goes to the owner and the original contractor, and when a pre-lien notice was required you must file an affidavit of compliance with your lien statement. Prime contractors on owner-occupied residential work have their own notice obligations to the homeowner. A missing or defective notice is one of the most common reasons we see liens attacked — and one of the first things an owner’s lawyer will look for.

What goes into the lien statement

The lien statement is filed with the county clerk where the property sits. It must be verified (sworn) and should include the amount claimed, the names of the owner and the party you contracted with, a legal description of the property, and the dates you furnished labor or materials. The county clerk then mails notice of the lien to the owner. Overstating the amount, including items that are not lienable, or describing the wrong property can invite a challenge — and can expose you to liability.

Filing is not the end — you must enforce it

A lien is a security interest, not a payday. If the owner or GC does not pay after the lien is filed, you must file a lawsuit to foreclose the lien within one year. If you do not, the lien expires, and the owner can record an affidavit to clear it from the title. In a subcontractor’s foreclosure suit, the original contractor generally must be joined as a party.

Oklahoma’s lien statute also provides that the party for whom judgment is rendered in a lien-enforcement action may recover a reasonable attorney’s fee (42 O.S. § 176). That cuts both ways: a valid, well-documented lien gives you leverage, but a sloppy or inflated one can leave you paying the owner’s lawyer.

Public projects: no lien, but a bond claim

You cannot lien public property — a school, city building, county road, or state facility. Instead, Oklahoma’s “Little Miller Act” (Title 61) requires prime contractors on most public jobs to post a payment bond, and unpaid subcontractors and suppliers make a claim against that bond. Bond claims have their own notice requirements and deadlines, so identify early whether your project is public.

Practical tips to protect your lien rights

1. Calendar your dates on day one. Track your first and last furnishing dates for every job.
2. Send pre-lien notices routinely on residential jobs and on any job that may top $10,000. A notice is cheap; a lost lien is not.
3. Get the legal description right. Pull it from the deed or the county assessor, not the street address on a work order.
4. Be careful with lien waivers. Do not sign an unconditional waiver for money you have not actually received.
5. Do not wait for “next week.” Promises of payment do not stop the 90-day or 4-month clock.

Frequently asked questions

How long do I have to file a mechanic’s lien in Oklahoma?

Ninety days after last furnishing labor or materials for subcontractors and suppliers; four months for original contractors who contracted directly with the owner.

Can I file a lien if I never had a written contract?

Often, yes. Oklahoma lien rights can arise from oral agreements, but you will need to prove the agreement, the work, and the amount. Keep texts, emails, delivery tickets, and invoices.

The owner says they already paid the general contractor. Can I still lien?

Possibly, but your recovery against the owner may be limited in that situation. This is exactly why pre-lien notices matter — they put the owner on notice before money changes hands.

Talk to Reams Law

Reams Law represents contractors, subcontractors, suppliers, and property owners in Oklahoma construction disputes, including lien filings, bond claims, and lien foreclosure suits. If you are not being paid on a project, call (405) 285-6878 or contact us online before your deadline passes. Learn more on our Construction Law page. Property owners facing a lien should read our companion guide, A Contractor Filed a Lien on Your Property. Now What?

This article discusses Oklahoma law in general terms. It is not legal advice, and reading it does not make anyone a client of this firm. Lien statutes are technical and are amended from time to time, and the outcome of any matter depends on its own facts. If you need to file or challenge a lien, speak with a lawyer about your situation specifically.