Estimate vs quote vs proposal — what to put on this document
Most service trades use the words estimate, quote, and proposal interchangeably, but they mean different things in a dispute:
- Estimate — a non-binding ballpark. The final bill can be higher if scope or materials change. Lower legal exposure for you, less certainty for the customer.
- Quote — a fixed price you commit to. The final bill cannot exceed it without a written change order. More certainty for the customer, more risk for you if you mis-scoped.
- Proposal — a sales document with scope and pricing, designed to win the job. Once signed, it functions as a quote.
This generator works for all three — the difference is in your scope of work and notes language. Add “Non-binding estimate; final pricing in formal quote” for an estimate, or “Fixed price quote; valid 30 days” for a quote.
What to include in every estimate
- Estimate number and date — for your records and the customer’s
- Valid-until date — estimates without expiration dates theoretically bind you forever; 30 days is standard
- Scope of work — what’s included AND what’s not. Specificity protects you in disputes.
- Line items — description, quantity, rate, amount per task or material category
- Subtotal, tax, total — show the math so the price isn’t a black box
- Terms — deposit required, payment schedule, late fee, change-order policy
- Acceptance signature line — turns the document into a written contract once signed
How to price the estimate
Most underpriced estimates start with gut-feel pricing instead of working from real cost. Use the free job cost calculator to plug in labor hours, materials, overhead, and target margin BEFORE writing the estimate — the output is the price that hits your real margin. Sister tools: markup calculator and hourly rate calculator.
Setting the validity period
Standard is 30 days. Use shorter (14 days) if your trade depends on volatile materials prices — lumber, copper, steel, fuel. After expiration, you’re free to re-quote at current prices without the customer claiming you’re backing out of an agreement.
Common mistakes that cost contractors money
- Scope-of-work that says “remodel the kitchen.” Vague scope = scope creep. List every fixture, finish, and demo step.
- No expiration date. Without one, you’re bound forever. Always include “Valid until [date].”
- No exclusions. Spell out what’s NOT included. “Excludes electrical work behind the wall” saves you from being expected to do it.
- No change-order language. Note that any scope changes will be quoted separately and require written approval.
- No signature line. An unsigned estimate isn’t enforceable. The signature is what turns this into a contract.
For a deeper breakdown, see our estimate vs invoice guide and how to write a winning client proposal.