To write a contractor estimate, list your business and license details, the customer and job address, a specific scope of work, materials, a clear price, what's excluded, how changes will be handled, the deposit and payment schedule, start and finish dates, and how long the price is valid. Then get it signed before work starts.
Below is a section-by-section checklist, a template outline you can copy, and sample wording for scope, exclusions, change orders and deposits. Contract rules vary by state, so treat this as general information, not legal advice, and check with your state contractor licensing board.
State licensing agencies give homeowners a checklist for the contracts they sign, so an estimate built around it answers the questions customers are told to ask. The National Association of State Contractors Licensing Agencies (NASCLA) and California's Contractors State License Board (CSLB) point to these items:
Your business details: company name, address, phone number and license number, plus the salesperson's name if one is involved.
A detailed description of the work and the materials, including brand, model number, color, size and quantity.
The total price the customer will owe when the listed work is complete.
A payment schedule that follows the amount of work completed.
Start and completion dates.
Permits: who will get them, and whether permit fees are included in the price.
Warranty: what labor and materials are covered and for how long, in writing.
Cleanup: what debris removal you will do and when.
Insurance: liability coverage, and workers' compensation where required.
Cancellation rights and any other notices your state requires.
Then add three things that protect you as the contractor: a clear list of exclusions, your change order terms and an expiration date for the price.
Header: business name, address, phone, email and license number.
Estimate details: estimate number, date and "Price valid until [date]".
Prepared for: customer name, phone, email and job site address.
Project summary: one or two sentences on the goal of the job.
Scope of work: numbered line items with locations, quantities and methods.
Materials: brand, model, color, size and quantity, or an allowance amount if the customer has not chosen yet.
Exclusions: what is not included.
Price: labor, materials, other costs and the total.
Schedule: estimated start and completion dates, and what could delay them.
Payment terms: deposit, progress payments tied to milestones, final payment and accepted payment methods.
Changes: your change order clause.
Permits, warranty, cleanup and insurance.
Required notices for your state, such as a right-to-cancel notice.
Signatures: customer and contractor, each with a date.
CSLB says the best way to avoid disputes over what is or isn't expected is to put all the details in a written, signed contract, and to be specific about materials: style, brand, model, quality, quantity, color and size. Compare these:
Vague: "Paint living room." Specific: "Living room walls, about 400 sq ft: fill nail holes, sand, spot-prime patches, two coats of [brand] eggshell in [color]. Ceiling and trim not included."
Vague: "Replace faucet." Specific: "Remove existing kitchen faucet, install customer-supplied [brand, model] faucet, reconnect supply lines, test for leaks, haul away old faucet."
Vague: "Clean up yard." Specific: "Front and back yard: mow and edge lawn, trim six shrubs along driveway, clear leaves from beds, haul away green waste."
For each line item, answer four questions: where, what, how much, and what "done" looks like.
An exclusions list heads off the "I thought that was included" conversation. CSLB's sample contract wording even leaves a blank for the items the contractor's scope of work does not include. Examples you might list:
Moving furniture or appliances
Repairing hidden damage found after demolition, such as rot or old wiring
Permit fees, if the customer is paying them directly
Ceilings, trim or closets when only walls are quoted
Hauling away old fixtures or appliances
Work by other trades, such as electrical or plumbing
For hidden conditions, say what happens next: you will stop, show the customer and price the extra work as a change order.
Put your change order terms in the estimate before the job starts. In California, home improvement contracts must include a note that extra work and change orders become part of the contract once the order is in writing and signed by both parties before that work begins. CSLB says a change order must describe:
The scope of the extra or changed work
The cost added to or subtracted from the contract
The effect on the payment schedule or completion date
Change orders can also remove items from the original job. Sample clause: "Any extra or changed work requires a written change order, signed by both parties before that work starts, showing the work, the price change and any change to the schedule and payments."
Spell out how much is due at signing, what triggers each progress payment and when the final payment is due. NASCLA's consumer guide tells homeowners to look for a payment schedule that parallels the amount of work completed and includes a retention, a percentage of each payment held back until the job is finished.
Some states limit deposits. In California, a home improvement down payment cannot be more than $1,000 or 10% of the contract price, whichever is less, and later payments cannot be taken before the work is done or the materials are delivered. On a $6,000 job that caps the deposit at $600; on a $25,000 job it is $1,000. Check your own state's rules before you set a deposit.
Sample schedule for a $12,000 bathroom job in California:
Down payment at signing: $1,000
After demolition and rough plumbing are complete: $4,000
After tile and fixtures are installed: $5,000
On completion and final walkthrough: $2,000
Each payment should match the value of the work done by that point. To set the price itself, our guide to markup vs margin for contractors shows how to price from your costs without shorting yourself.
An estimate is your proposal. A contract is the signed agreement. You can turn an accepted estimate into the contract by adding your state's required terms and getting signatures, so write it carefully from the start.
It depends on your state. In California, home improvement down payments are capped at $1,000 or 10% of the contract price, whichever is less. Check your state contractor licensing board for your rules.
There is no single rule. Pick a window you can honor, such as 30 days, and print the expiration date on the estimate so changing material prices don't eat your profit.
Rules vary by state. In California, home improvement projects over $500 in combined labor and materials must be in a written contract. A written, signed estimate is a good habit for every job.
ScopeBid is an iPhone estimate and invoice app for independent service pros. It starts a quote from a saved job, a trade template or a blank form, and creates PDF quotes and invoices with your logo and payment details without printing your internal cost or margin. It can add change orders, convert approved quotes to invoices and record deposits and partial payments, and it works offline, though it only records payments and does not process cards or move money.
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