Sales · How-to

How to write a contractor estimate customers sign

A good contractor estimate spells out exactly what you will and won’t do, what it costs, when each payment is due, how changes get approved, and how long the price holds, with your license number where your state requires it. Write it as if the customer will sign it, because they often do. Then send it fast and walk them through it.

By Eric Smith, founder of Outfitter AI and a former general contractor · Prices checked October 4, 2026

Estimate, quote or contract: know which one you’re writing

An estimate is your best figure for the work, often subject to change once walls are open. A quote is a fixed price for a defined scope. A contract is what the customer signs, and in many shops the signed estimate becomes the contract.

That last part is why this guide treats your estimate like a contract draft. If a homeowner can sign it and you start work, it needs to carry everything your state requires of a home improvement contract. California, for example, requires a written contract for home improvement work over $500 [1]. Massachusetts requires one for contracts over $1,000 [3]. Other states have their own thresholds and notices, and some have none. We use California and Massachusetts below as worked examples of what regulators ask for, not as rules that apply where you work. Check your own state’s contractor board or attorney general before you finalize a template.

For quick repair work priced on the spot, a simple invoice-style quote is often enough. Where the estimate fits in the whole sales process is covered in the contractor sales guide. For anything with a deposit, multiple days of work, or a homeowner’s signature, write the full version.

What goes on a contractor estimate

Work through this list from top to bottom. It’s the order homeowners read in, too.

• Your business details. Legal name, address (not just a P.O. box), phone, and license or registration number where your state issues one. California expects the license number, address and phone on the contract [2]; Massachusetts wants the registration number on the first page [3].
• Customer and job address. Full names of everyone who owns the home and will sign.
• Scope of work. What you will do, item by item, with brands, models and quantities where they matter (more on this below).
• Exclusions. What you are not doing, in plain words.
• Allowances. Dollar amounts for items the customer hasn’t picked yet.
• Permits. Who pulls them and who pays. California names building permit responsibility as a contract item [1].
• Timeline. Expected start and completion dates, and what can delay them. The FTC tells homeowners to look for an estimated start and finish date [4].
• Price and payment schedule. Total price, deposit, and what triggers each later payment.
• Change-order process. How changes get priced and approved, in writing.
• Expiration. How long the price holds.
• Warranty. What you stand behind, for how long, and what voids it.
• Required notices. Cancellation rights and any state-specific warnings.
• Signatures and date. Yours and the customer’s, with a copy for them.

Also write down anything you promised out loud. The FTC’s homeowner advice says the contract should include promises made in conversations about scope and cost [4]. If you told them you’d haul away the old tub, it goes on the paper.

Two state examples: California and Massachusetts

These two states publish clear consumer guidance, so they make good benchmarks for what a careful estimate looks like. Your state may require more, less or different items. None of this is legal advice; check your state’s rules before you rely on a template.

Federal law adds one more layer for sales made in the customer’s home. The FTC’s Cooling-Off Rule gives buyers until midnight of the third business day to cancel many sales made at their home, and the seller must hand over a contract or receipt plus two copies of a cancellation form [5]. Repair or maintenance visits the customer asked for are excluded, though anything extra you sell during them is covered [5]. If you sell at the kitchen table, build that notice into your estimate template so it’s never forgotten.

Writing a scope a homeowner can’t misread

Most disputes start with a vague scope line. California’s guidance gives the model: not “new cabinets” but the wood, the maker and the model number [1]. Apply that to every trade. These are illustrative examples, not real jobs:

Write scope in the order you’ll do the work. Use the customer’s words for rooms (“upstairs hall bath”), not yours (“bath 2”). If a photo shows it better, attach the photo and refer to it.

Exclusions, allowances and change orders

Exclusions protect both sides. List the things a reasonable homeowner might assume are included: painting after drywall repair, moving furniture, rotten framing found after demo, electrical work on an HVAC job, tree trimming before a roof tear-off, or carpet re-stretching after a basement waterproofing job.

Exclusions line, example: Not included: painting, wall repair beyond the patch around the new panel, and any repairs to hidden damage found once work begins. Hidden damage will be shown to you and priced in a written change order before we fix it.

Allowances handle choices the customer hasn’t made. Name the item, the dollar amount, and what happens if they spend more or less.

Allowance line, example: Tile allowance: $8 per square foot for floor tile, material only. If your selection costs more, the difference is added by change order; if it costs less, the difference is credited on the final invoice.

That $8 figure is a placeholder. Set your allowances from what your customers actually pick, and make them realistic. A low allowance makes the estimate look cheaper and sets up an awkward conversation later.

Change orders should be in writing, signed before the extra work starts. California tells homeowners to keep change orders with their contract papers [2]. A one-line process on the estimate saves arguments:

Change-order clause, example: Any change to this scope will be written up with its price and any schedule effect and signed by both of us before the work is done. Verbal requests can’t be added without a signed change order.

Payment schedule and expiration

Tie each payment to something the customer can see happen. Avoid payments by calendar date alone on jobs that can slip.

The FTC tells homeowners not to pay in full up front and not to make the final payment until the work is done [4]. Build your schedule around that expectation and you’ll get fewer objections. For more on structuring deposits, see deposits and payment terms.

Expiration. Put a date on every estimate, not “30 days” with no start point. Material prices move, and your schedule fills. A line like “Price good through November 15; after that we’ll re-check material costs” is honest and gives you a natural reason to follow up.

Presenting it and sending it fast

A complete estimate that arrives a week late loses to a decent one that arrives tonight. Speed also tells the customer how you’ll run the job.

1. Build templates by job type. One for each common job, with scope lines, exclusions and notices already written. You fill in measurements and models.
2. Put a one-paragraph summary on top. What’s wrong, what you recommend, the total, and how long it takes. Many homeowners stop reading after this.
3. Offer options when it fits. Replacement jobs often deserve two or three versions. See good-better-best pricing.
4. Add photos. The cracked heat exchanger, the soft decking, the corroded tank. Photos answer “do I really need this?” better than words.
5. Send it the same day when you can. For simple jobs, before you leave the driveway. For bigger ones, by the next morning.
6. Walk through it. Read the big items aloud in person or on a short call. Point out exclusions yourself rather than letting the customer discover them.
7. Schedule the follow-up before you send. Put the next touch on your calendar. Our estimate follow-up guide has the cadence and templates.

Sending text: Hi Linda, your estimate for the basement bathroom is in your email now. The top section sums it up in a paragraph. I’ll give you a call Thursday evening to go over questions, unless you’d rather talk sooner.

Before sending, do a last check: are the names and address right, does the math total, is the license or registration number there if your state requires it, is there an expiration date, and are the cancellation notices attached for sales made at the home?

Common questions

Sources and how we compared

Contract requirements come from the California Contractors State License Board, the Massachusetts Office of Consumer Affairs and the FTC’s consumer pages, opened October 4, 2026; they are examples, not legal advice for your state.

1. California CSLB: What should I look for in a contract? — Contractors State License Board consumer page
2. California CSLB: Home Improvement Contracts consumer guide (PDF) — October 2024
3. Mass.gov: Required contract terms in a home improvement contract — Massachusetts Office of Consumer Affairs and Business Regulation
4. FTC: How to avoid a home improvement scam — Federal Trade Commission consumer advice
5. FTC: Buyer’s remorse: the FTC’s Cooling-Off Rule may help — Federal Trade Commission consumer advice

Last updated October 4, 2026. Prices change; if something here is out of date, call or text (507) 628-0400 and we’ll fix it.

Related: Sales and follow-up: the full guide · Estimate follow-up for contractors · Good-better-best pricing · Deposits and payment terms