What counts as a change order?
A change order is any customer-approved change to the original estimate or contract after the job starts. It can add work, remove work, change materials, adjust the schedule, or cover hidden conditions discovered in the field.
The best practice is simple: if it changes scope, price, timeline, or responsibility, document it before the work happens. That protects the customer from surprises and protects your margin from free labor.
Field rule:
Never bury change-order work inside the final invoice as a vague “extras” charge. Customers dispute surprises. They approve specifics.
5-step contractor change order process
Stop work on the changed scope
Keep working on the original approved scope, but do not start the new work until the customer approves price, timeline, and payment terms in writing.
Document what changed and why
Name the exact room, area, fixture, material, drawing, or customer request. Attach photos when the change is caused by hidden damage or site conditions.
Price labor, materials, markup, tax, and schedule impact
Treat the change like a mini estimate. Include supplier increases, disposal, return trips, supervision time, and any extra permit or inspection work.
Get approval before ordering or installing
A text message is better than a handshake, but a signed change order with date, amount, payment due, and completion impact is best.
Update the invoice and job notes immediately
Add the approved change order to the customer invoice, production schedule, and crew notes so the office, field, and customer all see the same scope.
How to price a change order
Direct labor
Crew hours, supervisor time, setup, cleanup, and return-trip time.
Materials
Actual supplier cost, waste, delivery, special-order fees, and restocking risk.
Subcontractors
Trade partner quotes plus your coordination markup.
Overhead and profit
Do not price change orders at cost. They still use office time, insurance, trucks, and risk.
Schedule impact
Added days, resequencing, missed inspection windows, or overtime needed to protect the completion date.
Tax and fees
Sales tax, permit fees, card fees, disposal, or compliance costs where applicable.
For small jobs, use a minimum change-order fee so tiny requests do not destroy the day. For larger projects, tie payment to approval: due now, due before material order, or due on the next progress invoice.
Customer wording you can use
“We can absolutely handle that. Since it is outside the approved estimate, I’ll write it up as a change order with the exact scope, price, and schedule impact. Once you approve it, we can add it to the job and keep everything documented.”
This keeps the conversation positive without agreeing to unpaid work. It also gives the customer a clear next step instead of a verbal maybe.
Real change order examples
Flooring
Customer upgrades from builder-grade carpet to LVP after demo.
Line item: Change Order #2 - LVP upgrade: 720 sq ft material difference, underlayment, transition strips, extra labor, and one added install day.
Plumbing
Wall is opened and old shutoff valves are corroded.
Line item: Change Order #1 - Replace two corroded shutoff valves discovered during vanity install; includes parts, labor, and water shutoff coordination.
Painting
Customer adds ceilings and two closets after the original wall-only estimate.
Line item: Change Order #3 - Add ceiling paint and closet interiors; includes prep, two finish coats, material, and added half-day labor.
Common mistakes to avoid
How Quote Anvil helps
Quote Anvil makes it easier to turn approved changes into clean line items, updated estimates, customer-facing invoices, and job notes your crew can trust. Keep scope, pricing, approvals, and payment links in one contractor-friendly workflow.