Subcontractor business

How to protect lien rights as a subcontractor

Collect the right project information at the start, send any required preliminary notice on time, never sign a waiver for money you have not received, and track every lien and bond deadline from your first and last day on the job.

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Review invoices, committed costs, and cash timing together before making project decisions. AI-generated illustration.

Subcontractors protect their lien rights with four habits: gather the owner, GC, lender, and bond information when the job starts; send any preliminary notice your state requires within its deadline; sign only waivers that match money actually received; and calendar the lien recording deadline from your last day of work. On public jobs, where liens usually do not apply, the same habits protect your claim against the payment bond. Most subs lose lien rights by missing a notice in month one, not by missing the lien deadline at the end.

A mechanics lien is a claim against the property for unpaid work or materials. Lien rights come from state statutes, and the rules differ a lot from state to state: who must send notice, when, to whom, and how long you have to record. The steps below work everywhere. The deadlines come from your state's statute, which you can find in mechanics lien laws by state.

Step-by-step: protecting your lien rights

1. Collect project information at job intake

Before you mobilize, get the property owner's legal name and address, the property's legal description or parcel number, the GC's legal name, any construction lender, and whether there is a payment bond (with the surety's name and bond number). The notice of commencement, where your state uses one, often has most of this. Wrong names are a common way notices fail.

2. Send the preliminary notice on time

Many states require subs and suppliers who do not contract directly with the owner to send a preliminary notice or notice to owner. Two examples show how different the rules are. In California, a preliminary notice must be given no later than 20 days after the claimant first furnishes work; a late notice is allowed, but lien, stop payment notice, and bond rights are then limited to work furnished within 20 days before the notice and after. In Florida, a lienor not in privity with the owner must serve a notice to owner before starting or within 45 days after starting to furnish. Send it on every job where your state requires it. See how to send a preliminary notice.

3. Keep proof of delivery

Use the delivery method your statute requires, such as certified mail with proof or personal service, and keep the receipts, a copy of the notice, and the date sent. If you ever record a lien, you will need to prove the notice went out.

4. Handle lien waivers carefully

With each payment, give a conditional waiver for the amount you are billing, and an unconditional waiver only after the money clears. Never sign an unconditional final waiver before final payment, and read the waiver's "through date" and exceptions so you do not waive unpaid change orders or retainage by accident. Some states require statutory waiver forms. See conditional vs unconditional lien waivers.

5. Track your first and last furnishing dates

The notice clock usually runs from your first day of work or delivery; the lien clock from your last. Record both in your daily logs. Small punch or warranty work may not extend the deadline in your state, so do not count on a return trip to buy time.

6. Record the lien before the deadline

If you are not paid, record the lien within your state's window. Deadlines vary widely. In California, a claimant other than a direct contractor must record before the earlier of 90 days after completion of the work of improvement or 30 days after the owner records a notice of completion or cessation, which can shrink your window fast. In Florida, a claim of lien must generally be recorded within 90 days after the lienor's final furnishing. Read when to file a mechanics lien.

7. Use bond rights on public jobs

On federal projects, the Miller Act payment bond replaces lien rights. A sub that has not been paid in full within 90 days after its last labor or material may sue on the bond. A second-tier sub, with no contract with the prime, must give the prime written notice within 90 days of its last work, and any suit must be brought within one year after the last labor or material. State and local public jobs have their own bond statutes, often called Little Miller Acts. See how the Miller Act protects subcontractors.

Worked example: a millwork sub on a California office remodel

Say a millwork sub contracts with a GC for $96,000 of casework on a private office remodel in California. Here is how its lien file looks.

Example lien timeline for a California sub
DateEventAction
March 3First shop drawings and site measure (first furnishing)Preliminary notice due within 20 days; sent March 10
April through JuneMonthly paymentsConditional waivers with each pay app; unconditional after funds clear
July 18Last casework installed (last furnishing)Logged in daily report
August 1Owner records notice of completion30-day recording window starts; deadline August 31
August 20$31,000 still unpaidLien recorded with time to spare

The sub almost missed one thing. Without a notice of completion, it would have had up to 90 days after completion of the whole project. Because the owner recorded one, the window became 30 days. The sub only knew because it had asked the GC to tell it when the notice was recorded and checked the county records itself. The lien prompted a call from the owner's lender, and the balance was paid within two weeks.

Lower-tier subs and suppliers: extra care

If you work for another sub instead of the GC, or you only supply material, your rights are usually narrower and the notice rules matter even more. Some states limit how far down the chain lien rights reach, and the Miller Act stops at the second tier for bond claims. Ask for the full chain of contracts at intake: who you work for, who they work for, and the owner. Send notices to every party the statute names. If you are a sub-subcontractor on a bonded job, get a copy of the payment bond before you start, not after a payment goes missing.

Mistakes that cost subs their lien rights

  1. Skipping the preliminary notice because "this GC always pays."
  2. Using the GC's name where the owner's legal name is required.
  3. Signing an unconditional waiver for a check that has not cleared.
  4. Waiving retainage or pending change orders by signing a broad final waiver.
  5. Counting the deadline from the wrong date, such as invoice date instead of last furnishing.
  6. Assuming lien rights exist on a public job, then missing the bond notice.

State pages, templates, and terms

Check your state, for example the California mechanics lien guide or the Florida mechanics lien guide. Track waivers in the lien waiver tracking template. Related terms: conditional lien waiver, unconditional lien waiver, and notice of completion.

Smart Business Automator stores first and last furnishing dates, notice dates, and waivers on each job, and alerts you as notice and lien deadlines approach. See construction accounts receivable automation.

Frequently asked questions

Do subcontractors have lien rights?

On private projects, subcontractors generally have lien rights, but many states attach conditions such as a preliminary notice. Lower-tier subs and suppliers may have fewer rights. Check your state's statute.

What happens if I miss the preliminary notice deadline?

It depends on the state. In some states you lose lien rights entirely. In California a late notice is allowed, but your lien covers only work furnished within 20 days before the notice and after it.

Can I file a lien on a public project?

Usually not. Public property generally cannot be liened, so subs rely on payment bonds instead: the Miller Act on federal jobs and state bond laws on state and local jobs.

Does signing a lien waiver give up all my rights?

Only to the extent the waiver says. A conditional waiver takes effect when payment is received; an unconditional one takes effect immediately. Read the amount, the through date, and any exceptions before signing.

When does the lien deadline start?

Usually from your last day of furnishing labor or materials, or from project completion or a recorded notice of completion, depending on the state. California and Florida both use different triggers, so check yours.

Sources

  1. California Civil Code section 8204 (preliminary notice timing)
  2. California Civil Code section 8414 (claimants other than direct contractors)
  3. Florida Statutes section 713.06 (notice to owner)
  4. Florida Statutes section 713.08 (claim of lien)
  5. 40 U.S. Code 3133: Rights of persons furnishing labor or material (Cornell LII)
Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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