Construction Liens and Lien Waivers

A contractor completes a $300,000 job, but the general contractor declares bankruptcy before making payment. Without proper lien protection in place, that contractor might never see a dime. Scenarios like this play out more often than you’d think in the construction industry, which is exactly why understanding construction liens matters so much.

What Makes Mechanics’ Liens So Powerful

A mechanic’s lien gives contractors, subcontractors and suppliers a legal claim against the property they’ve improved. Think of it as insurance that attaches directly to the real estate. If you installed HVAC systems, poured concrete or delivered materials to a project, you have the right to file a lien if you don’t get paid.

The beauty of a mechanic’s lien is that it follows the property, not the person who owes you money. Even if ownership changes hands, your lien stays attached. This makes property owners very motivated to resolve payment disputes quickly because an active lien can block refinancing, sales and future development.

But here’s what trips up many contractors: every state has different rules about filing deadlines, notice requirements and what work qualifies for lien protection. In Florida, subcontractors and suppliers must serve a Notice to Owner within 45 days of first furnishing labor or materials to preserve their lien rights. Miss that window and you can’t file a lien at all, regardless of what you’re owed. You then have 90 days from your last day of work to actually file. Once filed, you have one year to initiate a legal action to enforce the lien or it expires. Some states require preliminary notices before you even start work, while others have different rules for residential versus commercial projects.

The Lien Waiver Trade-Off

Now let’s talk about the other side of this equation. Lien waivers are documents where you give up your right to file a construction lien in exchange for payment. Property owners and general contractors love them because waivers provide certainty that subcontractors and suppliers won’t place unexpected liens on the property down the road.

You’ll encounter two main types. Conditional waivers say “I’ll waive my lien rights once this check clears,” while unconditional waivers give up those rights immediately upon signing. Never sign an unconditional waiver until money is actually in your account. It’s not uncommon for contractors to sign away their rights only to have checks bounce or payments fall through.

Partial waivers cover progress payments for work completed through a specific date, while final waivers release all lien rights for the entire project. Read every waiver carefully before signing. Some contain overly broad language that waives rights beyond just lien claims, potentially giving up your ability to pursue other legal remedies if disputes arise.

Get Your Accounting Systems Right

Here’s where solid accounting becomes essential. You can’t protect your lien rights if you don’t know exactly when you last provided labor or materials to a project. Your accounting system needs to track these dates with precision because filing deadlines run from your last day of work, not from when you submitted an invoice.

Job costing systems that capture real-time data about labor, materials and subcontractor costs for each project are critical for lien protection. This level of detail helps you make informed decisions about when to pursue lien rights versus accepting negotiated settlements.

Smart contractors also track lien waiver exchanges as part of their payment application process. Before signing a waiver for a progress payment, verify that the amount matches what you’ve actually invoiced and that you’re only waiving rights for work completed through that specific date. Your accounting team should reconcile waiver amounts against accounts receivable to catch discrepancies before you give up legal protections.

Protect Your Business

Construction liens give contractors a powerful tool for recovering payment, but only if you understand the requirements and stay on top of deadlines. Document everything from your first day on a project. Keep detailed records of work performed, materials delivered and communications with general contractors and property owners. If payment problems develop, you’ll need this documentation to file a valid lien.

Consider consulting with legal counsel when projects exceed certain dollar thresholds or involve complex ownership structures. Public projects often have completely different rules involving payment bonds instead of liens. Federal construction projects, for example, fall under the Miller Act (40 U.S.C. § 3131), which requires performance and payment bonds for contracts exceeding $100,000 rather than allowing mechanic’s liens against government property. Florida has no state-level prevailing wage law, but public project bond requirements still apply at both the state and federal level.

Don’t Let a Missed Deadline Cost You the Payment You Earned

Your controllership team plays a key role in protecting lien rights across multiple projects simultaneously. As your project portfolio grows, tracking various state requirements, filing deadlines and waiver documentation becomes increasingly complex. This is where having experienced accounting professionals who understand construction-specific regulations makes a real difference. James Moore’s construction team helps contractors implement systems that protect lien rights while maintaining positive relationships with general contractors and owners. If you’re managing payment risk across multiple projects, let’s talk about building the right infrastructure.

All content provided in this article is for informational purposes only. Matters discussed in this article are subject to change. For up-to-date information on this subject please contact a James Moore professional. James Moore will not be held responsible for any claim, loss, damage or inconvenience caused as a result of any information within these pages or any information accessed through this site.