Getting Paid on Time as an SPF Subcontractor: Terms, Lien Rights, and Red Flags

A steady pipeline of work doesn't mean much if payment drags out for months after the job is done. Payment risk is one of the most common frustrations subcontractors across every trade run into — and it's worth understanding the mechanics before you sign a subcontract, not after you're already chasing an invoice.

Know what "Net 30" actually means

Most standard subcontracts specify payment terms like "Net 30 from an approved pay application" — meaning the clock starts when your pay app is approved, not when you submit it. Ask directly how pay applications are reviewed and approved on a given job, and how long that review step typically takes, before you assume Net 30 means 30 days from the day you finish work.

Understand pay-when-paid vs. pay-if-paid clauses

Some subcontracts include a "pay-when-paid" or "pay-if-paid" clause, which ties your payment to the GC first getting paid by the owner. These clauses shift payment-timing risk (or in the case of pay-if-paid, in some states, payment risk itself) onto the subcontractor. Read this language carefully and understand what it means for your cash flow before you sign — and know that enforceability of pay-if-paid clauses varies by state.

Know your lien rights — and their deadlines

Mechanic's lien rights exist in some form in every U.S. state and Washington, D.C., giving unpaid subcontractors a legal claim against the property they improved. But lien rights aren't automatic — many states require a preliminary notice or pre-lien notice sent early in the job (sometimes within the first 20-30 days) just to preserve your right to file later if you don't get paid. Missing that early notice deadline can cost you the right to lien at all, regardless of how legitimate the unpaid invoice is.

Retainage and conditional lien waivers

Retainage — commonly 5-10% of each pay application withheld until substantial completion — is standard on many commercial and larger residential jobs. It's normal, but make sure the retainage percentage and release conditions are spelled out in writing. Also read any lien waiver carefully before signing: a conditional waiver (effective once payment clears) protects you far better than an unconditional waiver signed before funds are actually in hand.

Red flags worth slowing down for

• A GC or broker who won't put payment terms in writing before work starts.
• Pressure to sign an unconditional lien waiver before payment has actually cleared.
• Vague or shifting scope with no clear change-order process for extra work.
• No clear point of contact for pay application approval or a pattern of slow-walking approvals.
• A price that seems well below market with no clear explanation — often a sign of downstream payment or scope problems.