Make an estimate clear before the job changes

Written by the Offertje editorial team. Examples are illustrations, not market-rate research. Reviewed November 5, 2026.

An estimate is useful when the customer can connect the total to a specific result. “Repair and paint” leaves too much open. Describe the areas, preparation, materials and completion conditions you have actually allowed for. A document title alone does not settle what either party has agreed to.

Start with the work, not a template price

For a painting project, a clearer scope might identify the rooms and surfaces, the preparation included, the number of coats and who supplies the paint. Record access requirements and anything that must happen first. If hidden damage has not been inspected, do not price the example as though you already know its condition.

Separate exclusions from vague small print. For instance, wallpaper removal or replacement of damaged trim may be outside the described job. The point is to make the boundary understandable before work starts, not to surprise the customer when the invoice arrives.

Make your own quantities explain the amount

Suppose you allow 10 hours at $60 and $240 of separately priced materials. The subtotal is $840 before any applicable tax. These are illustrative figures, not a local labor-rate benchmark. Check that preparation, travel attributable to the job, cleanup and handover have been allowed for where relevant.

State whether the amount is an estimate subject to specified assumptions or a fixed price for the described scope. Identify the version, date and period for which the figures are valid. Do not describe an estimate as a tax invoice or imply that a generic template meets every state's contractor requirements.

Document the change before doing the extra work

If the customer asks for additional work, describe the addition and its effect. Two extra labor hours at $60 plus $40 of material produces an extra $160 before tax. A change record should identify the original estimate, the added work, the revised amount and any schedule change. Keep evidence of the customer's agreement through your normal business process.

• Use customer and job details that identify the project.
• List quantities, unit prices and clear scope boundaries.
• Show tax separately where applicable and verify its basis.
• Make payment stages and start conditions explicit.
• Save the version both parties reviewed.

Requirements depend on business type and location, as the SBA explains. A sales-tax input only performs arithmetic; it does not determine what is taxable or the right jurisdiction. Use the estimate tool with your checked scope and figures, and get local guidance when the job requires specific contract wording.