A PCB assembly quote is useful only when its scope is clear. Compare the same released files, build quantity, material responsibilities and acceptance requirements before comparing unit prices. Separate one-time charges from recurring costs so that the first order and repeat orders can be evaluated on their own terms.
Use one comparison baseline
Give every supplier the same PCB fabrication files, BOM revision, placement data, assembly drawings and quantity breaks. Identify unresolved items rather than letting each supplier make a different assumption. The PCBA RFQ package checklist provides the starting file list.
Break the quote into comparable items
| Cost item | What to align | Question to resolve |
|---|---|---|
| Bare PCB | Layer count, material, thickness, copper, finish and panel requirements | Does the quote cover the same fabrication specification and panel quantity? |
| Components | Exact MPNs, approved alternates, order quantities and supplied material | Who owns excess material, minimum-order exposure and unused stock? |
| Setup and tooling | Stencil, programming, fixture and setup scope | Which charges recur after a revision change or a repeat order? |
| Assembly | SMT sides, through-hole operations and manual work | Are coating, cleaning, harness work and mechanical assembly included? |
| Inspection and test | Coverage, test limits, fixtures and required records | Are programming, calibration, retest and failure analysis included? |
| Delivery | Packaging, shipment terms and destination | Which freight, customs and receiving responsibilities sit outside the price? |
Separate first-order and repeat-order totals
For a stated quantity, show the quoted recurring charges, one-time charges and other agreed charges separately. Divide the comparable order total by the same delivery quantity if an effective per-board cost is needed. Record the assumptions alongside the calculation. A fixture allocated over one pilot lot cannot be compared directly with a fixture allocated over an uncommitted annual forecast.
Ask how long the material and pricing assumptions remain valid. Identify whether quantity breaks depend on one purchase order, a forecast, a material commitment or a delivery schedule. A forecast is not the same as an approved purchase commitment.
Review sourcing exceptions before choosing the lowest bid
Mark no-substitute components and require explicit approval for alternatives. Compare exact part numbers and sourcing assumptions, including customer-supplied parts. Keep unavailable items and excluded operations visible in the comparison. See the BOM sourcing risk guide for the material questions to resolve.
Keep test scope and acceptance criteria aligned
Two quotes may describe different products if one includes only an inspection step and the other includes programming, functional testing or calibration. Request the proposed coverage and records, then resolve gaps against the product's requirements. Use the test-strategy guide to prepare that discussion.
Record why the quote changes
Retain the original quote, revised quote and the engineering or sourcing change that connects them. Classify differences by quantity, revision, material, process, test or delivery scope. The engineering-review quote-change guide explains how to turn a revised number into a reviewable decision. Price, lead time and capacity remain subject to the confirmed project scope.