Last Furnishing Date: How to Calculate Your Mechanics Lien Deadline

Most lost liens are not lost because the contractor didn't know the deadline was "90 days." They are lost because the contractor counted the 90 days from the wrong day. In most states the lien clock does not start when you sent your last invoice, when the owner stopped answering the phone, or when the building got its certificate of occupancy. It starts on your last furnishing date: the last day you actually provided labor, materials, or equipment to the job.

This guide explains what counts as a last furnishing date, what courts routinely throw out, how to count the days, and the handful of states where the clock runs from something else entirely.

What "last furnishing" actually means

Statutes word it differently ("last day of work," "final furnishing," "last performed labor or furnished materials"), but the idea is the same: the final date on which you contributed something of substance to the improvement of the property under your contract. For a subcontractor, that is usually the last day your crew was on site doing contract work. For a supplier, it is usually the date the last load of materials was delivered to the job, not the date it left your yard or the date you invoiced it.

The key word is substance. Courts look at whether the work was part of the original scope and needed to finish it, or whether it was a trivial trip made to stretch the deadline.

What usually counts, and what usually doesn't

Florida is a good example of how explicit this can get: its lien statute defines "final furnishing" and excludes corrective work, warranty work, and trivial items from it. Other states reach the same result through case law. The safe assumption everywhere is that the last day of real contract work is your date, and anything after it is a bonus you cannot count on.

How to calculate the deadline, step by step

1. Pin down the date from records, not memory. Pull daily logs, timesheets, signed delivery tickets, and rental return slips. The latest dated, signed document showing contract work or delivery is your best evidence.
2. Identify your role. Deadlines often differ for a direct (prime) contractor, a subcontractor, and a supplier. New York, for example, gives the same window to all, while California and Texas treat roles differently.
3. Find the trigger in your state. Most states use your last furnishing date. Some use completion of the whole project, and some shorten the deadline once the owner records a notice of completion (see below).
4. Count the days correctly. In most states, day one is the day after your last furnishing date. So a 90-day deadline with a last furnishing date of June 3 lands on September 1.
5. Check weekends and holidays. Some states roll a deadline that falls on a weekend or court holiday to the next business day. Others do not. Never rely on the roll-forward; file before the weekend.
6. Back off a margin. County recorders reject filings for formatting problems, wrong legal descriptions, and missing notarization. Aim to record at least a week before the last legal day so you have time to fix a rejection.

States where the clock works differently

A few large construction states show why "90 days from last work" is only a rule of thumb:

• California: Generally 90 days after completion of the entire work of improvement. If the owner records a notice of completion, the window shrinks to 60 days for a direct contractor and 30 days for everyone else, counted from recording. A subcontractor who finished months before the project wrapped can suddenly have only 30 days.
• Texas: For contracts after January 1, 2022, the lien affidavit is due by the 15th day of the third month after the month the original contract was completed, terminated, or abandoned (the 15th day of the second month on residential projects). You count months, not days.
• New York: Eight months after the last item of work or materials, but four months on a single-family dwelling.
• Florida: 90 days from final furnishing, with the warranty and corrective-work exclusions noted above.

Because the trigger event itself changes by state, a spreadsheet with one "days to file" column will be wrong for some of your jobs. LienWarden computes every deadline from the project dates you enter and adjusts when something like a notice of completion changes the math. Run a free deadline lookup for any state.

A worked example

A drywall subcontractor in Florida finishes hanging and finishing on March 14. The GC calls them back on April 2 to patch two walls damaged by the electrician, and on April 20 they return to pick up leftover board.

• March 14 is the last furnishing date. The April 2 patch is arguably corrective work, and the April 20 pickup is not furnishing at all.
• Counting 90 days from March 14 gives a last filing day of June 12.
• If the sub had counted from April 20, they would have filed on July 19, more than a month late, and the lien could be discharged with a possible exposure to the owner's legal fees.

The practical rule: when you have more than one candidate date, file by the deadline from the earliest credible one.

Don't forget the deadlines before the lien

The last furnishing date also drives or caps other deadlines. Many states require a preliminary notice within a set number of days of your first furnishing, and some require a notice of intent to lien a set number of days before the lien is recorded. After recording, you usually have a limited window to serve the lien and to file suit to enforce it. Missing any one of those can void the lien even if you recorded it on time. See our guides on preliminary notice and filing deadlines by state.

Frequently asked questions

Does my final invoice date start the lien clock?

No. Billing is not furnishing. The clock runs from the last day you supplied labor, materials, or equipment, which is often weeks before the final invoice goes out.

Can I go back to the job to extend my deadline?

Not reliably. Courts disregard trips that are trivial, warranty-related, or made mainly to extend lien rights. Treat the last day of real contract work as your date.

What if a change order was performed after my original scope ended?

If the change order is part of the same contract and adds real work, it usually moves your last furnishing date. If it is a separate contract, it may carry its own separate deadline. Document which contract each piece of work falls under.

What if I can't prove the exact last day?

Use the earliest date you can't rule out and file by the deadline it produces. Going forward, get delivery tickets signed on site and keep daily logs; they are the evidence a court will ask for.