The GC's billing coordinator sends the same email on the 20th of every month. Pay application, schedule of values, signed conditional lien waiver, backup. Three of those you can produce in ten minutes. The fourth is the one that stalls.
Three documents decide whether an electrical contractor gets paid on a commercial job: the preliminary notice, the lien waiver, and the labor backup that sits between them. Two of the three are binary. You either served the notice inside your state's window or you didn't. You either signed the waiver or you didn't.
Only the labor backup is negotiable. And negotiable is where the money actually leaks.
The hours on your pay app were real. The crew was there. The problem is almost never that the charge was unfair — it's that the record doesn't explain it. "88.77 hrs" invites a conversation. "Thu 7:02a–3:48p — pulled and terminated circuits 12–18, second-floor east wing" ends one.
A quick note before the details: this is not legal advice. Lien and notice law is set state by state, deadlines differ by weeks or months, and a dozen states dictate the exact waiver form you have to use. Confirm your own state's rules with your statute or a construction attorney. What follows is the paperwork mechanism and the field record behind it.
The three documents, three jobs, three moments
Most guides explain the lien waiver in enormous detail and treat the other two as footnotes. That's backwards for a sub, because the waiver is the last thing that happens and the least discretionary.
| Document | When it happens | What it does | What kills it |
|---|
The notice protects the right. The waiver spends it. The backup sets the number in between — and that number is the only one anybody argues about.
Preliminary notice: the clock starts your first day on site, not at contract signing
A preliminary notice is a short document you serve at the beginning of your work telling the owner, the prime contractor, and often the lender that you're furnishing labor to the project. It preserves your ability to file a mechanics lien later. It is not a threat, and on most commercial jobs the GC expects it.
The deadline almost always runs from your first day of furnishing labor or materials to that project — not from the date you signed the subcontract, and not from the date the job broke ground.
That distinction matters for electrical subs specifically. You often mobilize months after the contract is executed, and you may furnish a temp power hookup in March and not come back for rough-in until June. The clock started in March.
Three states, three completely different rules, to show the range:
| State | Notice a sub generally owes | Timing |
|---|
Read the Texas row again, because it's the pattern most people get wrong. Some states want one notice at the start. Others want a notice tied to each month you worked, which means your notice calendar is driven by the same monthly labor record that drives your pay app.
Practical version: put the notice deadline on a calendar the day the first man steps on site, not the day the contract comes back signed. Serve by a method that produces proof of delivery. Keep the green card or the carrier receipt in the job folder with everything else.
And no — sending a preliminary notice does not signal distrust. On commercial work it's routine paperwork, and plenty of GCs won't process a first pay app without one on file.
What actually goes in the envelope with a pay application
A complete electrical pay app packet runs to nine documents: the application itself, the schedule of values, labor backup, material invoices, T&M tickets, a change order log, a conditional waiver, lower-tier waivers, and certified payroll on public work. Ask a GC's PM what they need and you'll get that same list back. It's worth writing down once, because most short-pay fights start with something missing from it.
- Pay application (AIA G702/G703 or the GC's own form)
- Schedule of values, with the current period's percentages
- Labor backup — hours by day, by person, with the work described
- Material invoices for anything billed as stored or installed material
- T&M tickets for any work outside the base contract scope, signed in the field
- Change order log showing what's approved, what's submitted, what's pending
- Conditional lien waiver for the current period's amount
- Lower-tier waivers from your subs and, on some jobs, your supply house
- Certified payroll, if it's a prevailing-wage or public job
Levelset's 2022 Construction Cash Flow & Payment Report found that fewer than 40% of construction businesses get paid within 30 days on average, and that GCs at the top of the chain are several times more likely to hit that window than the subs below them. The gap isn't mysterious. GCs bill the owner from a package the owner accepts. Subs bill from a package that has to survive a PM's opinion first.
The third document nobody names: labor backup
Labor backup is the sheet that proves the hours on your pay app were worked, by whom, on what date, doing what. It is not a payroll register and it is not a copy of your timecards.
Payroll shows what you paid. Backup shows what got built. Those are different documents with different audiences, and handing over the wrong one is how cost rates end up in front of a customer who has no business seeing them.
Keep them structurally separate. Customer-facing backup should carry the bill rate, the hours, and the description of work — never the cost rate, never labor cost, never margin. If you want to see what that separation looks like on a finished page, there's an annotated sample billing packet you can read without signing up for anything.
Arcadis's 2022 Global Construction Disputes Report ranked "poorly drafted or incomplete and unsubstantiated claims" as the number-one cause of construction disputes globally. Unsubstantiated is the operative word. Not wrong. Not inflated. Just unsupported.
What a defensible electrical labor line looks like
A defensible line answers four questions in one row: when, who, what, how long. Drop any one of them and the line becomes an opinion.
| Weak line | Defensible line | Why it survives |
|---|
Clock times on those lines are in-to-out, and span × headcount equals the hours billed — this crew's break is paid. If yours deducts an unpaid lunch, put the deduction on the line itself, so a PM running the arithmetic lands on your number instead of a smaller one of his own.
The defensible lines cost a foreman a few extra moments at the end of a shift. The weak ones are faster to write and slower to collect on: they move the job of explaining the charge out of the field, where somebody still remembers, and into a phone call in September, where nobody does.
Electrical work has a specific reason to be strict about this: most of what you install gets covered. Rough-in disappears behind drywall weeks before anybody verifies quantities. Your labor line is the only surviving witness to work that no longer has a visible face.
Note what's not on the defensible lines: no editorializing, no "had to redo because GC's framer was late," no complaints. Facts, locations, quantities, ticket numbers. Keep the argument out of the record and the record wins arguments.
The through-date problem: what a progress waiver quietly sweeps up
There are four waiver types, and every guide covers them. Here's the short version, and then the part that actually costs money.
| Type | Takes effect | Sign it when |
|---|
| Conditional progress | Only if and when the payment clears | Submitting a pay app for a period |
| Unconditional progress | Immediately on signature | The progress payment has actually cleared |
| Conditional final | Only if and when the final payment clears | Submitting the final billing |
| Unconditional final | Immediately on signature | The final check has cleared, including retainage |
The rule of thumb every sub knows: never sign unconditional before the money is in the account. The rule almost nobody applies: the through-date releases everything, not just what you billed.
A progress waiver releases claims for work performed through a date. Not through an invoice. Not through an approved amount. Through a date.
So every unsigned T&M ticket, every pending change order, and every hour you performed but haven't billed yet — if it happened before that through-date, the blanket language reaches it unless you carve it out.
Set the through-date to the last day of your pay-app period, not the day you happen to sign. If the GC's form arrives pre-dated to the 31st and your billing period closed on the 25th, you just handed over six days of unbilled work for free.
Example arithmetic, with the inputs visible: you bill $42,000 of labor for the period. The contract holds 10% retainage, so $4,200 is retained and $37,800 is due. The waiver's through-date covers all $42,000 worth of work — the $4,200 you haven't been paid is exactly what the exclusion line has to name. Run it with your own contract amount and retainage percentage.How to write the exclusion line
You exclude by naming. That's the whole method. A carve-out that says "except for pending extras" is close to worthless, because nobody can tell later what "pending extras" referred to.
Twelve or so states — Arizona, California, Georgia, Massachusetts, Michigan, Mississippi, Missouri, Nevada, Texas, Utah and Wyoming among them, with Florida offering a statutory form that isn't mandatory — require or supply a specific statutory waiver form. Some require notarization. Where a statutory form is required, you generally can't rewrite it, but the forms anticipate this: California's statutory waiver and release forms (Civil Code §§ 8132–8138) include an Exceptions section for exactly this purpose.
Here is wording you can adapt. Fill in every blank; a blank line is a released claim.
This waiver and release does not cover, and the undersigned expressly reserves all rights with respect to: (1) contract retainage in the amount of $__________ withheld on work performed through the through-date stated above; (2) Change Order Request No. ____ dated __________, in the amount of $__________, submitted and not yet approved; (3) Time-and-material Ticket Nos. ____, ____ and ____, dated __________ through __________, totaling ______ labor hours, submitted and not yet approved; and (4) any labor performed after the through-date stated above.
Four categories, every time: retainage, pending change orders, submitted-but-unapproved T&M, and work after the through-date.
Now the part that makes the exclusion line real. You can only exclude what you can name — and you can only name what somebody wrote down at the time.
"Pending extra work, approximately 30 hours" is not a reserved claim. It's a hope. "T&M Tickets 221, 224 and 229, dated 8/06 through 8/15, 34.5 labor hours, directed on site per RFI 31" is a reserved claim, because every element of it can be produced on demand.
The exclusion line is only as good as the field record behind it. That's the same field record the GC's PM reads when deciding whether to approve your hours — one document doing two jobs.
T&M and change-order work: a different packet, a bigger risk
Base-contract labor gets billed against a schedule of values, so the percentage complete carries a lot of the argument. T&M has no schedule of values. The hours are the claim.
Which means extra work needs its own paper, created the day it happens:
- Written authorization before the work starts, or if the direction was verbal, a same-day email confirming it: who directed it, when, what scope, and that it's outside the base contract. A verbal direction confirmed in writing that afternoon is far more defensible than one you reconstruct in October.
- A numbered T&M ticket per day per event — date, workers, hours, description of work, materials, and a signature line for the GC's super or PM.
- A signature in the field, even an unofficial one. A super's initials on the ticket before he leaves the site are contemporaneous, and contemporaneous is what makes a record hard to argue with three months later.
- A change order log listing every request by number, date, amount, and status — approved, submitted, pending, rejected. This log is what you copy your exclusion line from.
Blank versions of all four documents — labor backup sheet, daily field report, change order log, and T&M work authorization — are in the T&M Billing Backup Kit, free and printable. Nothing to sign up for. Put the ticket book in the foreman's truck.
Worked example: one week of second-floor rough-in
Same week of work, billed two ways. The scope is identical; only the record changes.
Version A — what most pay apps look like:Week of 8/11–8/15. Electrical labor, 2nd floor rough-in. 88.77 hours @ $85.00/hr = $7,545.45.Version B — the same week from a labor backup sheet:
| Date | Worker(s) | Hours | Work performed |
|---|
| 8/11 | J. Ortiz, D. Webb | 16.0 | Set 4-sq boxes rooms 201–213, ran 3/4" EMT home runs to panel 2LA |
| 8/12 | J. Ortiz, D. Webb | 16.0 | Pulled and terminated circuits 12–18, 2nd flr east wing, panel 2LA |
| 8/13 | J. Ortiz, D. Webb, T. Alcala | 24.0 | Corridor rough-in; corrected box heights at corridor per RFI 27, ran 3/4" EMT toward rooms 214–221 |
| 8/14 | J. Ortiz | 8.77 | Set 14 4-sq boxes and ran 3/4" EMT, rooms 214–221 |
| 8/15 | D. Webb, T. Alcala | 12.0 | Relocated feeder at gridline C-4 per RFI 31 — T&M Ticket 229, directed by GC super on site |
| 8/15 | J. Ortiz | 12.0 | Terminated panel 2LA, labeled circuits, cleaned and secured area |
Total: 88.77 hours. Base contract labor: 76.77 hrs @ $85.00/hr = $6,525.45. T&M Ticket 229 (pending approval): 12.0 hrs @ $85.00/hr = $1,020.00. Bill rates are illustrative — use your own contract rate.
Version A and Version B bill the identical 88.77 hours. But look at what Version B does that Version A can't:
The 12 hours on 8/15 are separated and named, so they go on the change order log, get billed on their own ticket, and land on the exclusion line of the waiver as "T&M Ticket 229, 12.0 hrs, submitted and not yet approved." In Version A those 12 hours are buried inside 88.77, invisible, and quietly released the moment the waiver's through-date passes 8/15.
Example arithmetic, inputs visible: if a PM approves 60 of 88.77 hours and holds the rest pending "better breakdown," the held amount is 28.77 × $85.00 = $2,445.45 on a single month's application. Run it with your own hours and bill rate. If you want to price out what the back-and-forth itself costs in office hours, there's a dispute cost calculator for that.How crews actually capture the note at the end of a shift
Four capture methods hold up in the field: a clipboard in the gang box, a text thread per job, a shared sheet with a required work-performed column, or a time app that prompts at clock-out. This is the real obstacle, and pretending otherwise wastes everyone's time — the forms above are easy, and getting a foreman with dirty hands at 3:50 in the afternoon to write four legible lines is the hard part.
Here they are in rough order of how little they ask:
- Clipboard in the gang box. One labor backup sheet per job per week. Foreman fills a row per person per day before he leaves. Office photographs or scans it Friday. Zero technology to fail — but its failure mode is physical, so photograph the sheet before it leaves the job.
- A text thread per job. Foreman texts four lines to a job-specific number or group at the end of shift. Office pastes them into the weekly sheet. Timestamped by the phone, which is worth something.
- A shared spreadsheet with a locked column layout. Date, worker, in, out, hours, work performed. One tab per month. Works if — and only if — the "work performed" column is required and nobody is allowed to leave it blank.
- A time app that prompts for the note at clock-out. Some, FieldTimesheet included, ask "what did you work on?" when a worker clocks out and print the result as a per-job labor report. No app on the market generates your lien waiver or tracks your notice deadlines, though — that stays on your calendar and in your forms regardless of what you use to capture hours.
And frame it to the crew accurately, because they can smell the other framing from the parking lot. This is not about checking whether they were really on site. It's about making sure the work they actually performed gets paid for instead of chiseled down by somebody in an office who wasn't there. The record protects the crew before it protects anybody else.
Your monthly packet routine
This is a routine, not a project — the monthly assembly is mostly collating what the field already produced.
- Day one on a new job: calendar the preliminary notice deadline from first furnishing. Serve it with proof of delivery. File the receipt.
- Every shift: labor backup row per person per day, with the work described. T&M ticket the same day for anything outside base scope, signed in the field if possible.
- Weekly: collect sheets, chase any blank description column that same week — not at month end, when nobody remembers.
- By the 20th: assemble pay app, SOV, labor backup, material invoices, T&M tickets, change order log.
- Before signing any waiver: check the through-date against your billing period. Copy retainage, pending COs, and unapproved T&M from the change order log onto the exclusion line. Confirm it's conditional if the money hasn't cleared.
- After the check clears: sign the unconditional, with the same exclusions carried forward.
- At closeout: retain the labor records. Lien and claim windows run months past substantial completion, and warranty and dispute periods run years. Keeping backup for the length of your state's statute of limitations on construction claims is the conservative move — confirm that period for your state.
Frequently asked questions
Do I still need to send a preliminary notice if I have a signed contract with the GC?Usually yes — a signed subcontract with the GC does not preserve your lien rights against the owner, who isn't a party to it. The lien attaches to the owner's property, and most states require notice from anyone not in direct contract with the owner, which describes nearly every electrical sub on commercial work. Confirm the rule and the window in your state.
What backup does a GC actually require with an electrical pay application?At minimum: hours by date and by person with the work described, material invoices for anything billed as material, signed T&M tickets for out-of-scope work, and a current change order log. Ask the PM in writing what they need before the first application, and keep the answer in the job folder — it settles the "insufficient backup" argument before it starts.
Does signing a lien waiver release change orders and T&M work I haven't billed yet?Yes — a progress waiver releases claims for all work performed through its through-date, including change orders and T&M you haven't billed or gotten approved yet, unless you name them in the exclusions. That's the standard trap. List retainage, pending change order numbers, and unapproved T&M ticket numbers explicitly, every time.
Conditional or unconditional — which one should an electrical sub sign, and when?Conditional when you submit, unconditional after the funds have actually cleared your account. A conditional waiver only takes effect if payment is received; an unconditional takes effect on signature whether you get paid or not. If a GC insists on an unconditional before payment, that's a business decision, not a paperwork one.
Are timesheets enough labor backup, or do I need daily field reports too?Timesheets alone are usually not enough, because a timesheet answers "how long" and a PM is asking "for what." A timesheet with a required description-of-work column can do both jobs. A separate daily field report earns its keep on jobs with heavy change activity, weather delays, or access problems, where you need to document conditions as well as hours.
Can a GC hold payment because my hours aren't itemized?In practice, yes — most subcontracts condition payment on submission of backup the contractor finds reasonably satisfactory, which is broad language. That's why itemization is worth doing before it's demanded. Hours tied to locations, circuit numbers, and dates are hard to call unreasonable.
Who signs the lien waiver — the owner, the PM, or the foreman?Someone with actual authority to bind the company, which usually means an owner, officer, or someone specifically designated in writing. Never a field foreman as a routine matter. A few states also require notarization on certain waivers, so check the form your state or the GC requires.
How long should I keep timesheets and daily reports after a job closes?Keep labor backup for at least the length of your state's statute of limitations on construction claims. Lien and bond claim deadlines run months past your last day on site, and construction defect and payment claims can surface years later. Store it by job so a record can be pulled without a search, and confirm the limitations period that applies in your state.
The one-line version
The preliminary notice preserves the right. The waiver spends it. The labor backup decides how much it was worth.
You can only exclude what you can name, and you can only name what somebody wrote down the day it happened. Get the description column filled in and the rest of the chain has something solid to stand on.