Subcontractors have the right to require payment before additional work begins — and the smart ones put that requirement in writing before the first shovel hits the ground. When an owner or GC requests scope changes beyond the original contract, you are not obligated to start that work until terms are agreed upon and, depending on your contract language, a deposit or advance payment is in hand. Performing extra work without a signed change order or advance payment agreement exposes you to non-payment with almost no recourse: verbal agreements for additional scope are notoriously difficult to enforce, and mechanics lien rights on added scope may be limited if preliminary notice was not served to cover that work. According to Rabbet's 2024 Construction Payments Report, 82% of contractors face payment waits of over 30 days — scope creep and unauthorized extras are a primary driver. Related guidance: Is a No Lien Clause Enforceable? What Subs Must Know.
Why Should You Require Payment Before Additional Work Starts?
Requiring payment before additional work starts protects you from the single most common way subcontractors get burned: doing the work first and chasing the money forever after. Once your crew has already installed the extra circuits, added the HVAC unit, or framed the new room addition, your leverage drops to near zero.
Here is the practical reality: the moment you complete additional scope without a signed change order and advance payment arrangement, you become an unsecured creditor on that portion of the work. If the project hits financial trouble — owner runs out of funds, GC goes under, dispute erupts — extra work performed on a handshake is the first thing that gets cut in settlement negotiations.
The legal framework supports your position. Most state contract law allows a contractor to condition performance of new or additional work on advance agreement of terms, including payment. This is not the same as breaching the original contract — it is a separate negotiation for a separate scope of work. Refusing to start additional work until terms are set is not abandonment; it is basic contract formation.
According to NetSuite's 2025 construction payment management research, 75% of subcontractors report frequently floating payments while awaiting disbursements from above. Demanding payment before additional work is one of the few practical levers that stops that cycle before it starts.
What Contract Language Protects You on Scope Changes?
A contract clause requiring advance payment for additions should appear in every subcontract you sign — and if it is not there, you need to add it before signing. The clause should do four specific things:
1. Define what constitutes additional work. Any scope not explicitly described in the original contract documents is additional work. Do not let vague language leave room for argument.
2. Require a written change order before work begins. No signed change order, no work. Period. Include a provision that states: "Subcontractor is not obligated to perform additional work or changes in scope until a written change order has been executed by both parties specifying the additional price and revised schedule."
3. Allow you to require a deposit. Add language such as: "Subcontractor may require an advance payment of up to [50%] of the change order value as a condition of commencing additional work."
4. Suspend the schedule for the original work. Additional work that interrupts your planned sequence entitles you to a schedule adjustment. State it explicitly.
If you are a sub on a federal project, note that the Federal Acquisition Regulation (FAR) 52.243-4 governs changes clauses on federal construction contracts and requires the contractor to continue performance while disputes are resolved — but this applies to your obligations under the prime contract, not to separately negotiated scope additions outside that contract's scope.
On private commercial and residential projects, your leverage is governed by your own contract and state contract law. Most states follow general common law principles that allow parties to condition a new agreement on new terms, including payment in advance.
How Do You Collect Payment Before Proceeding With New Scope?
Collecting payment before proceeding with new scope requires a defined process — not just a conversation on the jobsite. Here is the sequence that works:
Step 1: Stop. Do not start the work. When an owner or GC asks you to do something outside your original scope, your default position is: not until we have a change order. Communicate this clearly and professionally, in writing, on the same day the request is made.
Step 2: Price the additional work in writing. Send a formal change order proposal via email or text with read receipt. Include the scope, price, deposit amount required, and a timeline for starting once payment is received.
Step 3: Require acknowledgment before mobilizing. Do not accept a verbal "go ahead." Require a signed change order or, at minimum, a written reply (email is sufficient in most jurisdictions) that acknowledges the price and authorizes you to proceed.
Step 4: Invoice the deposit separately and immediately. Issue a deposit invoice on the same day the change order is signed. Set a clear payment-due date — typically 3 to 5 business days before you plan to mobilize on the additional work.
Step 5: Apply the deposit to the final change order invoice. When the additional work is complete, issue the balance invoice crediting the deposit received.
This process creates a paper trail. If the payment never comes and you later need to file a mechanics lien on that scope, your documentation showing the written change order, the invoice, and the non-payment is the foundation of your claim.
Can You Legally Withhold Labor Until a Prior Invoice Is Paid?
Yes — withholding labor until a prior invoice is paid is a legal and widely recognized right for subcontractors, provided your contract does not contain language that waives it. This right flows from two sources: your contract's payment terms and, in some states, statutory protections.
Under your contract: If your contract specifies payment within 30 days and that invoice is now 45 days past due, you are performing new work on an account that is already in default. Most standard subcontract forms — including AIA A401 and ConsensusDocs 750 — include provisions allowing a subcontractor to stop work after providing written notice of non-payment and waiting a specified period (typically 7 to 14 days after notice).
Under state law: Several states give subcontractors a statutory right to suspend work for non-payment:
- California — Under Cal. Civ. Code § 8830, a claimant who has not been paid may stop work after serving written notice on the owner and GC.
- Florida — Under Fla. Stat. § 713.06, a subcontractor who has properly served a Notice to Owner has the legal framework to pursue all available remedies, including suspension, when payment is withheld beyond the statutory deadline under Fla. Stat. § 715.12 (Florida Prompt Payment Act).
- Texas — Texas Property Code § 53.083 allows subcontractors to suspend work after providing written notice when payments are not made as required.
The critical step: Before you pull your crew, send written notice. An email, certified letter, or text stating you are suspending work due to non-payment of Invoice #[XXX] dated [date], now [X] days past due, creates the record you need. Give the other party the notice period required by your contract — typically 7 days — before actually pulling off the job.
Do not just walk off silently. Abandonment without notice can expose you to a breach of contract claim, even when you are the one owed money.
What Happens When You Did Extra Work Based on a Verbal Agreement?
Performing work on a verbal agreement to do additional work unpaid — or with vague promises of future payment — is one of the most financially dangerous positions a subcontractor can be in. Here is why:
Verbal contracts are enforceable in theory, nearly impossible to prove in practice. Courts will generally enforce a verbal contract if you can establish that an offer was made, it was accepted, and there was consideration (e.g., the promise to pay). But when the other side denies the agreement, you are left with "he said, she said" — and that rarely ends well for the sub.
Your mechanics lien rights on that scope may be limited. If your preliminary notice only covered the original contract scope and you later performed significant additional work, some states may limit your lien rights to the work covered by your notice. In states like Florida and California, where the preliminary notice must be served before or within a short window of first furnishing, additional scope added months later may fall outside your protected position if notice was not updated.
What to do if you are already in this position:
- Gather every piece of evidence you have — texts, emails, photos of the work in place, scheduling communications, anything showing the scope was requested and performed.
- Send a written demand immediately referencing the additional work performed, the verbal authorization, and the amount owed.
- File a mechanics lien without delay. Most states measure lien deadlines from last furnishing of labor or materials — every day you wait is a day closer to losing your rights.
- Consult a construction attorney if the amount is significant.
Going forward, even a one-line text from the GC saying "go ahead with the extra framing, we'll handle the change order next week" is better than nothing. Train your team to get something in writing before they start.
How Does Protecting Lien Rights on Additional Work Differ From the Original Contract?
Protecting yourself when an owner requests scope changes requires treating the additional work as its own lien-protected event — not just a continuation of the original job. In many states, your preliminary notice obligations run from first furnishing on the project, but the scope covered by that notice is directly tied to what you are providing.
If you served a 20-day preliminary notice in California at the start of a job to install electrical rough-in and you are later asked to add a 400-amp service upgrade, that new scope may require a separate or updated notice filing to be fully protected. The same logic applies in Florida — your Notice to Owner establishes what you are providing, and substantial scope changes may fall outside that protection.
The practical rule: Treat every significant change order as a potential new lien notice trigger. When in doubt, file an updated preliminary notice citing the additional scope. The cost is minimal.
Across all eight states where LienFlash operates — Florida, California, Arizona, Nevada, Washington, Oregon, Texas, and New Mexico — preliminary notice deadlines are measured from your first furnishing date for the specific scope of work. Missing that window on additional work is a real risk on longer projects with evolving scope.
According to data from Lienser via DocJoist's Construction Payment Statistics report, preliminary notices were filed on projects valued at over $22.7 billion in 2024. Subcontractors who file are using the one tool that changes the power dynamic on payment disputes.
What Should Your Pre-Construction Process Look Like to Prevent These Problems?
The best time to establish payment before additional work terms is before the job starts, not mid-project during a heated scope dispute. Build this process into every job:
Before signing the subcontract:
- Confirm the contract contains a written change order requirement.
- Add a clause allowing you to require an advance deposit on change orders.
- Confirm your preliminary notice obligation in the project state and set a calendar reminder for the deadline.
At project kickoff:
- Serve your preliminary notice immediately. Do not wait. In California, you have 20 days from first furnishing. In Florida, you need to serve the Notice to Owner before or within 45 days of first furnishing to preserve full rights. Waiting costs you money.
- Document your scope clearly in writing with dated photos, delivery receipts, and daily logs.
When scope change requests come in:
- Respond in writing within 24 hours.
- State explicitly that work will not begin until a signed change order is received.
- Issue a deposit invoice if your contract terms allow.
When an invoice goes past due:
- Follow your contract's notice of non-payment procedure immediately — do not let it slide.
- Do not start new or additional work on a delinquent account.
This is not being difficult. This is running a solvent business.
Frequently Asked Questions
Can I stop work on an existing contract because additional work hasn't been paid?
You can stop work on the additional scope specifically — you are not obligated to start work you haven't been paid for. Stopping work on the original contract scope because a separate additional-work invoice is unpaid is riskier and depends on your contract language. Review your subcontract for payment default and suspension-of-work provisions before pulling your crew from original-scope work. When in doubt, send written notice of non-payment and give the required notice period before stopping.
Is a text message a valid change order?
In most jurisdictions, a text message can constitute a written agreement if it clearly identifies the scope, price, and both parties' agreement. Courts have routinely accepted texts and emails as enforceable written agreements. That said, a formal signed change order is always preferable. At minimum, get a text that says something like "Approved — proceed with [scope] for $[amount]" before you mobilize.
What if the GC says change orders are not approved until the owner signs off?
That is a GC problem, not yours. Your contract is with the GC, not the owner. If the GC has authority to direct your work, the GC has authority to issue a change order to you — their approval process with the owner is internal to them. Do not let upstream approval delays become your cash flow problem. Your change order is with the GC; hold the GC to it.
How much of a deposit should I require before starting extra work?
A 50% deposit on change order value is standard and widely accepted in the industry for additional work outside the original scope. On larger change orders (generally above $25,000), you may negotiate a phased payment structure — for example, 30% at start, 40% at midpoint, 30% at completion. The key is that some payment before starting signals commitment and weeds out GCs and owners who were never serious about paying for the extra work.
Does filing a preliminary notice help me collect on additional work?
Yes — a properly served preliminary notice preserves your mechanics lien rights, which are your most powerful collection tool. If a project owner or GC refuses to pay for additional work you have completed, a mechanics lien filed on the property puts a cloud on title that virtually forces payment or legal resolution. Without a valid preliminary notice on file, you may have no lien rights at all, depending on the state. File notice early and update it if scope changes significantly.
What if the owner says the additional work was included in the original scope?
This is a scope dispute, and your protection is documentation. A clearly defined original scope in the contract, a written change order request from the other party, photos showing the work performed, and your written response requesting a change order are your evidence. If the original contract scope is ambiguous, you are in a harder position — which is exactly why precise scope definition at contract signing matters. In a dispute, whoever has the better paper trail usually wins.
Can I file a mechanics lien on unpaid additional work even without a signed change order?
In most states, yes — your lien rights cover labor and materials you actually furnished to the project, regardless of whether a formal change order was signed. What you need to prove is that the work was actually performed, it was authorized (verbally or in writing), and payment was not made. Courts routinely allow lien claims on extra work when the claimant can show the work was requested and performed. The challenge is the burden of proof — which is why written evidence of the request is essential even if a formal change order was never signed.
How do I handle a GC who keeps authorizing verbal extras with promises to "get it on paper later"?
Stop accepting verbal authorizations. After the first instance, put it in writing yourself: send an email stating "Per our conversation today, I understood you authorized [scope description] for an estimated $[amount], to be memorialized in a change order. Please confirm." If the GC confirms by email reply, you have your written record. If they don't respond, you have documented the pattern. Repeated verbal authorizations without follow-through are a red flag for non-payment — treat each one as a warning sign.
Protect Your Lien Rights Today
Every change order that walks out the door without a preliminary notice in place is a collection risk. LienFlash files attorney-reviewed, state-compliant preliminary notices in about 2 minutes via USPS Certified Mail — and sends you a Certificate of Mailing PDF you can use in court. Whether you are starting a new job or adding scope mid-project, lock in your lien rights before you pick up a tool.
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