The hallway quote is where remodelers lose money on changes. You name a number that covers the obvious labor and parts, and forget the trip, the sub, the disposal and the markup. A short checklist, run the same way every time, fixes most of it.
01Why extra work gets underpriced
Extra work is usually priced in the worst possible conditions: standing in the client's house, mid-job, with the client waiting for a number. It's easy to name a figure that covers the obvious labor and materials and forget everything else.
The usual things that get left out:
- Setup and cleanup. Getting tools out, protecting floors, cleaning up after. It's the same whether the task takes one hour or six.
- Extra trips. A separate visit, a supply-house run, or a return trip for a second coat or an inspection.
- Subs. The electrician or plumber's price, plus your time coordinating them.
- Permits and inspections. Including the time to apply and meet the inspector.
- Disposal. Debris from demo or tear-out.
- Schedule impact. If the change pushes back other trades, that has a cost too.
- Overhead and profit. Insurance, vehicles, the office, your own time pricing the change. A change order with no markup costs you money.
The fix isn't a magic formula. It's a checklist you run every time, and the discipline to say "let me write it up" instead of quoting in the hallway. The script for that is in our free change order template article.
02The line-by-line method
Price every change the same way, using the same lines in the same order. That way nothing gets skipped because you were in a hurry.
1. Labor
Estimate hours for each person, then multiply by your burdened labor rate: the rate that covers wages plus payroll taxes, workers' comp, benefits and non-billable time, not just the hourly wage. If you don't know your burdened rate, your accountant or bookkeeper can help you work it out from your books. Include setup, cleanup and travel time.
2. Materials
Price the actual products from a current quote, plus fasteners, adhesives, consumables and a reasonable waste factor for things like tile or trim. Include delivery fees and any restocking fee if the change replaces something already ordered.
3. Subcontractors
Get the sub's price in writing for the change. Don't guess. Add your coordination time to the labor line.
4. Other direct costs
Permits, inspection fees, equipment rental, dumpster or disposal, special delivery.
5. Markup for overhead and profit
Apply your markup to the direct costs. What markup to use is your call and depends on your business, your market and your contract. Keep it consistent with how you priced the original job. If your contract states a markup on changes, use that.
6. Minimum charge
Many contractors set a minimum per change order, because the time to price, write, send and bill a change is the same whether it's a light switch or a wall. If you use one, put it in your contract so it's not a surprise.
7. Credits
If the change removes work from the original contract, show a credit. A fair credit is usually the cost you won't spend, not necessarily the full contract value of that line, since some of your overhead is already committed. Spell out your credit approach in the contract.
8. Days
Not a dollar line, but price it in your head. Write the days added on the change order, even if it's zero.
03A worked example
Here's how the method looks on a typical change: the client wants the bathroom vanity wall moved to fit a wider vanity.
Example numbers only. These are made-up figures to show the math. Use your own rates, quotes and markup.
| Line | Example calculation | Example amount |
|---|---|---|
| Labor (carpenter) | 6 hrs × $75 burdened rate (example) | $450 |
| Labor (setup, cleanup, coordination) | 2 hrs × $75 (example) | $150 |
| Materials | Studs, drywall, mud, tape, fasteners (example) | $180 |
| Plumbing sub | Relocate supply and drain, per sub's written quote (example) | $600 |
| Disposal | Share of dumpster (example) | $40 |
| Direct cost subtotal | $1,420 | |
| Markup | 20% of direct cost (example rate only) | $284 |
| Change order total | $1,704 | |
| Days added | Plumber return trip (example) | 1 day |
Notice what the hallway quote would have missed: the setup and coordination hours, the disposal, and possibly the markup on the sub. The checklist catches them.
The change order for this would read something like:
Free download
Get the free clause and approval text
A sample "changes to the work" clause to take to your attorney, the "let me write it up" script for clients, crew and subs, and the approval text you can save as a phone shortcut.
04Fixed price or time and materials?
You can price a change two ways. Both are legitimate. The key is to pick one and write it on the change order before the work starts.
| Fixed price | Time and materials (T&M) | |
|---|---|---|
| How it works | One price for the change, agreed up front. | Your stated hourly rates plus materials at cost plus markup, billed on actuals. |
| Client sees | A clear number to approve. | Rates, an estimate, and often a not-to-exceed cap. |
| Your risk | You eat overruns; you keep savings. | Lower, as long as you track hours and receipts. |
| Good fit for | Well-defined changes you've done before. | Hidden conditions and open-ended work, like "repair rot as found." |
For T&M, write the rates, the markup on materials and an estimated range on the change order, and agree on how often you'll update the client. A not-to-exceed amount, after which you'll stop and get another approval, makes T&M much easier for clients to say yes to.
05How to present the price
How you show the number matters as much as the number.
- Lead with scope, then price. The client should understand what they're getting before they see what it costs.
- Show the total, not every line. Most clients don't need your labor rate and markup broken out on a fixed-price change. Keep the detail in your file. Your contract may say otherwise for T&M or cost-plus jobs.
- Show the running contract total. Original contract + prior changes + this change = new total.
- Give options when it helps. "Option A: standard fixture, $[__]. Option B: the one you showed me, $[__]." Clients like choosing.
- Add a decision deadline when timing matters. "Approve by Wednesday so we can do it before drywall. After that it needs a cut-in and patch, priced separately."
Don't discount on the spot to avoid an awkward moment. Offer a smaller scope instead. The price stays honest and the client still gets a choice.
06Price faster without cutting corners
- Keep a cost sheet. Your burdened rates, markup, minimum charge, disposal cost and common material prices on one page. Update it when your costs change.
- Keep a past-changes log. Your own history of what similar changes actually took in hours is the best estimating tool you have. The log described in how to bill for change orders doubles as one.
- Use AI for the paperwork, not the price. Have an AI assistant turn your voice note into a clean change order and check it against your checklist for missing lines. You set every number. Prompts for this are in AI tools for residential contractors.
- Know when it's a change. If you're not sure whether to price it at all, use the four-question test in change order vs. scope creep.
The AI Change Order Pack · $47
The whole workflow, ready to copy
A 20-page guide plus an editable .docx change order template. You get 10 copy-paste prompts, a phone-only manual setup, an optional automated setup, client approval texts and emails, a pricing-the-change checklist and sample clause language for your attorney to review. One-time price.
07FAQ
What markup should I use on change orders?
There isn't one right number. It depends on your overhead, your market and your contract. Many contractors use the same markup they used on the original job; some use a higher one for changes because of the extra coordination. Your accountant can help you set a markup that actually covers your overhead.
Is it OK to charge more for changes than for the original work?
Changes often cost more to do because they interrupt the schedule and need extra coordination, so pricing that in is reasonable. Be consistent and put your change pricing approach in your contract.
How do I price a change I've never done before?
Get written quotes from subs and suppliers, estimate labor conservatively, and consider T&M with a not-to-exceed cap instead of a fixed price.
Do I have to show the client my markup?
On a fixed-price change, usually not, but it depends on your contract type. Cost-plus and some T&M contracts require showing costs and markup. Check your contract and ask your attorney if you're unsure.