How to Write a Job Estimate (With Examples)

A job estimate needs six things: who you are, the scope of work in plain words, line items with quantities and prices, what's excluded, your terms — deposit wording and a validity date — and the total. Get those six right and the paper wins work instead of starting arguments. It's the same structure our app Voice Estimate builds from a spoken walkthrough.

This page covers all six: what goes on the document, the writing process step by step, a complete example you can check line by line, and the terms language that protects you when the job turns out to be more than the walkthrough showed.

What should a job estimate include?

A complete job estimate has eight parts: your business info, the customer name and job address, a scope of work, line items with quantities and unit prices, a materials note, exclusions and assumptions, terms — deposit and validity — and the total with a signature line. Each one is there because leaving it off costs money:

How to write an estimate in 7 steps

1. Walk the job and measure. Dimensions, counts, and conditions — the deck's 12 by 16, the railing runs 40 linear feet, two boards feel soft. Everything else on the estimate is built from what you capture here, so capture it on-site, not from memory in the truck.
2. Write the scope in plain words. One or two sentences a customer can repeat to their spouse: "Pressure wash the deck and railing, sand rough spots, apply two coats of semi-transparent stain to the deck surface and one coat to the railing."
3. Turn measurements into quantities. 12 × 16 = 192 sq ft of deck surface; 40 linear feet of railing. For paint, fence, tile, and roof work, the guides on pricing a paint job, a fence job, a tile job, and a roof job cover the trade-specific takeoffs.
4. Price it with your rates. Unit rates, a lump sum, or a mix — the price is yours, built on your labor cost, your overhead, and your margin. No software should invent it for you.
5. Write the exclusions and assumptions. What you're not doing, and what you're taking for granted. This is the highest-value writing on the page — more on it two sections down.
6. Set the terms. Deposit as a condition of acceptance ("50% deposit due on acceptance, balance on completion") and a validity date ("valid for 30 days from the date above").
7. Review it and send it the same day. The estimate that arrives while the walkthrough is fresh in the customer's mind gets read differently than the one that shows up Thursday night. Check the quantities against your notes, confirm the total is the number you meant, and get it out.

A complete job estimate example

Here's the whole structure on one job: washing and staining a backyard deck. Deck work is dictated scope and line items in Voice Estimate — the four trades with automatic material calculators today are paint, fence, tile, and roof — so every quantity below came off a tape measure, and every price is the contractor's own rate.

The line items, priced at this contractor's example rates:

Below the line items, the parts that do the protecting:

• Exclusions: "No board replacement included. Boards found soft or split after washing are priced as a separate change order before staining begins."
• Assumptions: "Assumes water and power available on-site. Customer keeps furniture, planters, and pets off the deck for 48 hours after the final coat."
• Terms: "50% deposit due on acceptance, balance on completion. This estimate is valid for 30 days from the date above."

Every number in that table can be checked with a calculator: 192 × $1.75 is $336, 40 × $6.00 is $240, and the four line totals sum to $900. That's the standard your estimates should meet — a customer who checks the math and finds it clean stops checking you.

Scope, exclusions, and assumptions

Scope language is where estimates earn their keep, and the difference between weak and strong is specificity — not length.

A vague line: "Stain deck — $900." The line that holds up: "Pressure wash, sand rough spots, two coats semi-transparent stain on 192 sq ft deck surface, one coat on 40 LF railing." Same job, same price — but only one of them settles the "I thought that included the stairs" conversation.

Exclusions work the same way. "Ceiling and trim excluded" is one sentence on a paint estimate and an argument avoided after the furniture's moved. If you're not doing it, say you're not doing it — silence reads as included.

Assumptions cover what you can't see from the walkthrough. "Assumes existing subfloor is sound; repairs priced after demo" doesn't make the subfloor sound — it makes the surprise billable. Every trade has its version: hidden decking damage on a roof, soft boards under old stain, whatever the tear-out reveals. Name the unknown, and name the mechanism that prices it: a written change order, agreed before the extra work starts.

Pricing: lump sum or line items?

Whichever you choose, keep quantities visible. "192 sq ft, two coats" costs you nothing to include in a lump-sum scope and does most of the justifying for you.

Two terms belong on every estimate regardless of format. First, the deposit — written as a condition of acceptance: "50% deposit due on acceptance, balance on completion." On an estimate, deposit language is a term of the job, not money received; nothing gets subtracted from the total, because nothing has been paid yet. How much to ask for — and the state caps that limit it — is its own question, covered in the deposit guide. Second, the validity date. And a note on how binding any of this is: an estimate usually isn't a contract by itself, but courts look at the substance of the document rather than its title — a detailed scope with a firm price and a signature can be enforceable no matter what it's called, as Levelset's breakdown of estimates, proposals, and contracts lays out. The guide to estimates, quotes, bids, and proposals explains which document to send and how firm each price is. Write every estimate as if it will be held to.

Dictating the whole thing: a voice script

Everything above can be spoken during the walkthrough instead of typed at the kitchen table. Here's the deck job as one recording:

"Estimate for Dana Ruiz at 418 Maple Street. Pressure wash and stain a 12 by 16 deck with 40 linear feet of railing. Two coats of semi-transparent stain on the deck surface, one coat on the railing, both sides. Wash and prep is 175. Deck surface is a dollar seventy-five a square foot, railing is six dollars a linear foot, materials are 149. No board replacement — anything soft after the wash is a separate change order. Fifty percent deposit due on acceptance, and the price is good for 30 days."

Voice Estimate takes that recording apart the way you'd hope: "12 by 16" is captured as 12 and 16, and the server multiplies them — 192 sq ft, computed in code, because the AI is never asked to do arithmetic. The rates are your spoken prices, extracted literally. "Fifty percent deposit due on acceptance" lands in the acceptance terms as a condition, and "good for 30 days" sets the validity date because you actually said it. You review the draft, fix anything the site conditions changed, and send the PDF from the driveway.

Common mistakes on job estimates

• Scope without exclusions. Listing what you'll do but not where the job stops. The customer's imagination fills the gap, and it always fills it in their favor.
• Quantities without units. "Railing — 40" means nothing in a dispute. Feet? Sections? Spindles? Write the unit every time a number could be read two ways.
• A total with nothing behind it. One number and a handshake description looks fast to write and reads as a guess. Visible quantities are what separate a price from a hunch.
• Fuzzy deposit language. "50% deposit" alone doesn't say when. "Due on acceptance" makes it a condition of starting — and keeps the estimate honest: it's a term of the job, not a payment that's already happened.
• No validity date. Material prices move. An estimate with no expiration is an offer to eat every increase between now and whenever the customer gets around to it.

What to review before you send

• Scope says what you're doing in words the customer can repeat
• Every quantity has a unit, and the line-item math checks out
• Exclusions cover the stairs, the ceiling, the hidden damage — whatever this trade's "I assumed that was included" is
• Assumptions name the unknowns and the change-order mechanism that prices them
• Deposit is worded as a condition of acceptance, with the balance timing stated
• Validity date is on the document
• Your business info and license number are on it, and the total is the number you meant