You quoted a one-day job. Then you opened the crawlspace, the wall, or the panel and found something no one could see at the walkthrough. Now it's a two-day job.
When an electrician job took longer than quoted, the extra hours aren't the hard part. The conversation about them is. The customer agreed to one number. You're about to hand them a different one.
This is the order of operations for that moment: what to write down, what to say, what to get signed, and how to write the invoice so the customer can check the extra charge for themselves.
Can You Bill for a Job That Took Longer Than Quoted?
Yes, when the overrun comes from a hidden condition your contract covers or a change the customer approves in writing. On a plain fixed quote with no exclusions, the extra time is usually yours to absorb.Which case you're in depends on what the customer signed. Here's how the risk splits by contract type:
| Contract type | Who carries the overrun | Can you bill the extra time? |
|---|
| Fixed quote, no exclusions | You | Only if the customer approves a change order |
| Fixed quote with an unforeseen-conditions clause | Shared: you carry what you could see, the customer carries what was hidden | Yes, for the hidden condition, once it's documented and approved |
| Not-to-exceed (NTE) | You, above the cap | Up to the cap. Above it, only with written approval to raise it |
| Time and materials (T&M) | The customer | Yes, but only for hours your records can back up |
One rule holds across all four. The time to raise the overrun is before you do the extra work, not on the invoice.
State rules matter too. Some states, California among them, require changes to home-improvement contracts to be written and signed. Check with your state contractor board before you rely on a verbal yes.
The Charge Was Fair. The Explanation Was Missing.
Most overrun fights aren't about the money. They're about a customer who can't see why the number moved.
A line that says "additional labor: 5.5 hrs" asks them to take your word for it. Some will. The ones who won't assume padding, and then you either knock it down or win the argument and lose the customer.
The fix is a record written while the work happens. Compare these two:
| What the customer sees | How it reads |
|---|
| Additional labor, 5.5 hrs | "Why? You said one day." |
| Day 2, 7:30a–1:00p, lead + helper: crawlspace access blocked by cast-iron drain and HVAC duct at the planned route. Fished 110 ft around the obstruction from the north vent, terminated at the charger. | "Okay. I saw that duct." |
Same hours, same rate. The second one is something the customer can check. They can look in the crawlspace. They can match the times to when your truck was in the driveway.
The field note is the explanation. Everything below is how to get that note written and in front of the customer at the right time.
The Hard Part: Getting the Crew to Write It Down
The person who found the problem is the one holding the fish tape, not the one writing the invoice. If the note doesn't get written on site, it gets reconstructed from memory three days later, and memory makes a poor exhibit.
Crews skip notes for ordinary reasons. The form is long. It's at the end of the day. Nobody has ever said what the note is for.
What works in practice:
- Ask one question, not a form. "What did you do, and what did you run into?" at the end of each block of work.
- Tell them what it's for. The note protects the crew. It's what stops a customer from calling their day's work padding.
- Accept short. "Blocked by cast iron at N wall, rerouted via N vent, 110 ft" is plenty.
- Make photos part of the stop, not an extra chore. Two phone shots of the obstruction take ten seconds.
Step 1: Stop and Document Before You Keep Going
The moment you know the job will run long, stop and record the condition before you work around it. Once you've rerouted, the evidence is behind you.Capture four things:
- Photos of the hidden condition, wide and close. Include something for scale.
- The time you found it, written down, not guessed later.
- What you already tried, with times. "8:40a–10:15a: attempted fish from access hole, blocked at 14 ft."
- What it will take to finish: extra hours, extra hands, extra material, a return trip.
The crew photographs the blockage and writes the times down. Finishing will take a second day with a helper, about 5.5 hours each.
Step 2: Call the Customer Before the Extra Hours, Not After
Call while you're still on site, explain what you found, give a number or a cap, and ask for approval before you continue. A surprise on the invoice starts the argument. A call before the work usually heads it off.Here's example wording (rates and hours are from the worked example; use your own):
"We hit something we couldn't see when we quoted this. The route under the house is blocked by the cast-iron drain and the heating duct. I've got photos I'll text you right now.>
To get around it we need a second day and a helper. That's about 5.5 hours each, at $110 an hour for me and $65 for the helper, which comes to roughly $960 more. I'll put it in writing with a cap so it can't run higher without asking you again.>
Or, if you'd rather, we can look at a different route or stop here. What would you like to do?"
That script does four things. It names the cause, shows the proof, gives a number with a ceiling, and hands the customer a real choice.
Example arithmetic for the figure above: lead at an example bill rate of $110/hr × 5.5 hrs = $605, plus helper at an example $65/hr × 5.5 hrs = $357.50, for $962.50 in labor. Run it with your own rates and hours.Use your bill rate here, the rate the customer pays. Never your cost rate or what you pay the crew.
Step 3: Get a One-Page Change Authorization Signed
A verbal yes on the phone isn't enough. Get a signature before day two starts, even if it's a photo of a signed sheet or a reply to a text.Copy this and fill in the blanks:
CHANGE AUTHORIZATION — [Job name / address]
Original quote: $[amount], dated [date]
Condition found: [plain description, e.g. "crawlspace route blocked by cast-iron drain and HVAC duct; not visible at walkthrough"]
Found on: [date, time] — photos attached
Added work: [e.g. "reroute via north crawlspace vent; second day, lead + helper"]
Price change: billed T&M at $[lead rate]/hr and $[helper rate]/hr, not to exceed $[cap] without further written approval. Materials at [cost / listed price].
New total, not to exceed: $[original + cap]
Customer signature / date: ________ Contractor signature / date: ________
An NTE cap on the change keeps the customer from worrying that the meter will run without limit. It also keeps you honest about the estimate.
If the customer won't sign anything, at least send a text or email that repeats the condition, the added price, and the cap, and get a written "approved" back.
Step 4: Write the Invoice So the Customer Can Check It
Split the invoice into the original scope and the approved change, and give each line a date, a time window, who worked, and what got done. The customer should be able to match every added dollar to the signed authorization.Example invoice layout (labeled example, using the rates above):
| Line | Date / time | What was done | Hours | Rate | Amount |
|---|
| Original scope (fixed) | Tue 7:15a–3:30p | Installed 60A breaker, mounted charger, attempted route under crawlspace; blocked at 14 ft by cast-iron drain + HVAC duct (photos attached) | — | Fixed | $1,500.00 |
| Change auth. #1 — lead | Wed 7:30a–1:00p | Rerouted via north crawlspace vent, fished 110 ft around obstruction, terminated at the charger, tested | 5.5 | $110 | $605.00 |
| Change auth. #1 — helper | Wed 7:30a–1:00p | Fed wire from crawlspace side during reroute | 5.5 | $65 | $357.50 |
| Total (change auth. #1 cap: $1,000) | $2,462.50 | ||||
Attach the photos and a copy of the signed authorization. The total came in under the cap the customer approved, and the invoice shows that.
To see a full customer-facing layout with notes on each line, look at the sample billing packet. For more on structuring T&M backup, see T&M billing best practices.
What If the Customer Says No to the Extra Charge?
You have three honest options: finish at the original price, stop and bill for work completed to date, or propose a different scope that fits the original number. Which one you pick depends on your contract and your read of the relationship.- Finish and absorb it. Sometimes that's the right call for a small overrun or a customer you want to keep. Write it on the invoice as "no charge" with the hours shown, so they see what they got.
- Stop at a clean point. If your contract has an unforeseen-conditions clause, the work you've done is billable. Your dated notes and photos are what back that up.
- Change the scope. A surface-mounted raceway along the garage wall might fit the original price where the crawlspace route can't.
What If You Already Did the Extra Work Without Asking?
Bill it anyway if your contract allows, but lead with the evidence, not the number. Send the photos and the dated notes first. Then send the invoice with the overrun on its own line.Expect to negotiate. Without a signed authorization, the customer's position is stronger. A record written at the time still beats a reconstruction, and it gives the customer a reason to believe the hours were real.
Next time, make the call in Step 2 before the extra work starts.
Step 5: Fix the Next Quote
Keep a simple log of quoted hours against actual hours by job type, and write the reason next to every miss. After a dozen jobs, the pattern tells you which jobs need a contingency or a different contract type.| Job type | Quoted hrs | Actual hrs | Over / under | Reason (from field notes) |
|---|
| EV charger, crawlspace route | 8 | 19 | +11 | Route blocked by drain + duct; helper day 2 |
| EV charger, garage surface run | 6 | 5.5 | −0.5 | — |
| Panel swap, 1960s house | 10 | 14 | +4 | Aluminum branch circuits found; pigtailed per approval |
Then change the paperwork, not just the number:
- Add an unforeseen-conditions clause to every quote. Example wording: "Price assumes accessible routing and code-compliant existing wiring. Concealed conditions found during work will be documented, reported to the owner before proceeding, and billed as a change at the rates below." Have your attorney or state trade association review it for your state.
- List your T&M rates on the quote so a change doesn't introduce a new number.
- Quote closed-wall and crawlspace work as T&M with an NTE, or give a fixed price with a stated allowance for access problems.
- Offer a paid pre-bid inspection on jobs where the route can't be seen.
FAQ
Can an electrician charge more than the quote?
Yes, when the extra comes from a hidden condition your contract covers, or from a change the customer approves in writing. On a plain fixed quote with no exclusions and no approved change, the overrun is usually the contractor's to absorb.
Is an electrician's quote legally binding?
A signed fixed quote is generally a contract for the scope it describes. A verbal ballpark usually isn't. Rules vary by state, and some require home-improvement changes to be written and signed, so check with your state contractor board.
What should I say to a customer when the job is taking longer?
Say what you found, show them a photo, give the added cost with a cap, and offer a choice: proceed, change the approach, or stop. Do it before the extra work, from the job site if you can.
How do I document a hidden condition on an electrical job?
Take wide and close photos, write down the time you found it, note what you tried and when, and estimate what it will take to finish. Do it before you work around the problem, while the evidence is still visible.
Should I give money back if a fixed-price job finishes early?
That's a business decision, not an obligation. A fixed price carries risk both ways. Some contractors keep the difference to cover jobs that run long, and some pass on a discount for goodwill. Either way, be consistent.
What's the difference between T&M and not-to-exceed for uncertain jobs?
T&M bills actual hours and materials with no ceiling, so the customer carries the risk. NTE bills the same way but caps the total, so you carry the risk above the cap. NTE is often easier for a homeowner to say yes to.
What if my crew didn't write down what they did on the extra day?
Rebuild the record from what you do have, such as fuel stops, supply house receipts, texts, and photo timestamps. Mark it as reconstructed, and expect less weight on it than on notes written that day. Start same-day notes on the next job.
Get the Paperwork
Everything above works on paper. The free T&M Billing Backup Kit has a change-order log, a T&M work authorization, a daily field report, and a labor backup sheet. Print them and keep them in the truck.
Questions about any of it: support@fieldtimesheet.com.