Start with the work you understand
To write a contractor estimate, establish the project scope, record the assumptions and calculate the costs before presenting a total. An attractive document cannot correct an unmeasured quantity or an excluded task the customer thinks is included.
Use the assessment needed for the actual project. Keep unknown conditions visible rather than treating a preliminary figure as if every detail has been verified. This guide covers document planning and arithmetic, not a complete construction agreement.
Record the project and scope
Identify your business, customer, project location, estimate reference and issue date. Describe the work in terms the customer can check. Separate the main scope, exclusions, assumptions and any options instead of hiding all of them in a short line labeled labor.
For a chosen example, describe a measured area to prepare and paint, the surfaces included, preparation agreed and the product assumptions. Do not let an illustrative quantity become a verified measurement or a promise that concealed conditions are covered.
If another person prepared the measurements or supplier information, keep that source with the working record. Decide what must be confirmed before the estimate can become a final agreed scope.
Calculate quantities, costs and selling price
Use consistent units for each item. Record materials, labor, subcontract work, delivery and other relevant costs without counting the same amount twice. Confirm current supplier amounts rather than copying an old job's prices without review.
Markup and gross margin are different calculations. If a chosen job cost is $800 and markup is 25%, the pre-tax selling price is $1,000 and gross profit is $200, or 20% of selling price. That is original arithmetic, not a recommended trade rate or guaranteed net profit.
Use the markup calculator to check the denominator you intend. Allow for overhead and other costs in the business's costing process. Do not apply an invented standard margin merely because a template contains one.
Keep tax and optional work explicit
Tax treatment depends on the applicable rules and job facts. The estimate tool uses only the taxable amount and rate you enter; it does not choose them for you. Get the appropriate advice for the actual work before issuing a document with tax claims.
Present optional work so the customer can distinguish it from the base estimate. Record which option was selected and update the agreed scope. Avoid a total that silently includes some options and excludes others.
Review the notes and document status
Include the schedule assumptions, validity period and payment notes appropriate to the actual proposal. Do not invent a legally required deposit or cancellation period. Required notices, licensing disclosures and contract terms need review for the project and location.
The FTC Cooling-Off Rule explanation covers certain off-premises consumer sales with exceptions. It is not a universal cancellation rule for every estimate or online purchase. A general estimate template does not supply every required agreement or notice.
Check and retain the final version
Review quantities, units, arithmetic, scope, exclusions and customer details before sending. Keep the version issued and the record of any later revision. If the work changes, document the changed scope and price rather than silently replacing the original estimate.
After work is appropriately authorized, the work-order tool can organize instructions. The invoice tool records charges and prior payments. Neither tool supplies e-signatures, automatic legal compliance or a payment ledger.
If customers need a clearer route to request estimates, see our contractor website service. Website forms collect project information; they do not replace your assessment and agreement process.
Checked: November 11, 2026. Worked numbers are illustrative. Obtain appropriate professional review for tax treatment, agreements and required notices.