A PCB assembly quote is a priced manufacturing scope covering bare boards, components, assembly processes, inspection, testing, documentation, schedule and commercial assumptions for a defined revision and quantity. A low unit price is not comparable until inclusions, exclusions, one-time charges and landed cost are normalized.
Key Takeaways
- Submit one revision-controlled package: fabrication data, BOM, centroid/pick-and-place, drawings, test requirements and quantity breaks.
- Use exact manufacturer part numbers and approved alternates; descriptions alone create sourcing and substitution risk.
- Separate recurring unit cost from stencil, tooling, programming, test-fixture and engineering NRE.
- Ask who owns unused reels, moisture-sensitive components, stencils, fixtures, firmware keys and production data.
- Compare the same yield/scrap allowance, test coverage, packaging, freight, duties, Incoterm and payment terms.
- A quote is provisional when DFM, BOM availability, panelization or test scope remains unresolved.
Submit a Quote-Ready Data Package
Most online assembly workflows request Gerber or equivalent manufacturing data, a BOM and a component placement file. A serious production quote needs more context.
| File or requirement | Minimum content | Common pricing error when missing |
|---|---|---|
| Fabrication package | Gerber/ODB++/IPC-2581, drill, outline, stackup, drawing, impedance and finish | Board price assumes a standard construction that differs from design intent |
| BOM | Reference, quantity, manufacturer, exact MPN, description, DNI and approved alternates | Wrong package/value or unapproved substitute is priced |
| Pick-and-place/CPL | Reference, X/Y, rotation, side and origin | Manual placement review or orientation ambiguity adds time |
| Assembly drawing | Polarity, special mounting, hardware, adhesives, jumper and hand-work notes | Nonstandard operations are omitted |
| Panel data | Customer panel or agreed supplier panel, rails, fiducials, tooling, breakaway and keep-outs | Panelization/depaneling is priced twice or not at all |
| Test/programming | Test specification, firmware, keys, fixture, limits, logs and coverage | Quote includes AOI only while buyer expects functional test |
| Quality/logistics | IPC/J-STD class, traceability, reports, packaging, labeling, ship-to and Incoterm | Documentation, packing, freight or duty appears later |
Every file should carry the same assembly revision. Include an approved deviation process so the supplier cannot silently “make the BOM work.”
Choose Turnkey, Partial Turnkey or Consigned Assembly
| Supply model | Buyer provides | Supplier provides | Main commercial question |
|---|---|---|---|
| Full turnkey | Released data and approvals | PCB, components, stencil, assembly and quoted tests | Are component source, markup, excess and traceability explicit? |
| Partial turnkey | Selected long-lead, programmed or controlled items | Remaining material and manufacturing | Who verifies incoming customer material and shortages? |
| Consigned | All or most components, sometimes bare boards | Assembly labor/process and tests | What attrition quantity, packaging and date-code condition are required? |
Consignment does not eliminate component risk. The buyer may still owe inspection, baking, re-taping, lead forming, shortage handling or line stoppage charges if supplied parts are unsuitable.
Understand Every PCB Assembly Cost Driver
The quote should separate enough detail to explain changes without exposing proprietary labor formulas.
| Cost group | Typical drivers |
|---|---|
| Bare PCB | Size/panel yield, layers, material, copper, vias/drills, impedance, finish, tolerance, quantity and electrical test |
| Components | MPN price, MOQ/SPQ, reels/trays, authorized source, lead time, lifecycle, tariff and attrition |
| Setup/NRE | Stencil, programming, tooling, process engineering, first article, fixtures and documentation |
| SMT | Side count, placements, package mix, paste steps, fine pitch, BGA/QFN, odd form and reflow complexity |
| THT/mechanical | Manual/selective/wave solder, press-fit, hardware, heatsinks, wires, adhesives and torque |
| Inspection/test | SPI, AOI, X-ray, flying probe/ICT, boundary scan, programming, functional test and report retention |
| Finish/logistics | Cleaning, coating, potting, depaneling, labeling, MSL/ESD packaging, freight, insurance and duty |
Quantity affects more than labor. Component price breaks, minimum buys, panel utilization, feeder setup and amortized NRE change at different volumes. Request prototype, pilot and expected annual-volume breaks using the same revision and scope. For a controlled early build, review the small-batch assembly route alongside the quote.
Normalize Quotes to Total Landed Cost
Use one comparison period and currency. The purchasing decision should consider:
landed cost = quoted recurring + amortized NRE + excess/attrition + freight + insurance + duty/tax + buyer handling
Taxes recoverable by the buyer should be treated according to its accounting policy. Currency, commodity and component prices can move during quote validity; record the exchange-rate basis and repricing triggers.
Do not divide every reel or fixture into the first small build without also tracking ownership and reuse. Conversely, do not ignore cash tied in supplier-held excess material. Ask whether unused parts are returnable, stored for the next build, transferable to the buyer or non-cancellable/non-returnable.
Control Component Sourcing and Substitution
A price is only as reliable as its BOM match. Require exact MPN, manufacturer, quantity and source for critical parts. State whether broker sourcing is prohibited or requires case-by-case approval. An “equivalent” capacitor, connector, oscillator, regulator or memory device can change fit, qualification, firmware or compliance.
The quote review should flag:
- obsolete, NRND, allocation or long-lead items;
- MOQ/SPQ and excess quantity by line;
- date/lot-code, country-of-origin or authorized-channel requirements;
- moisture-sensitivity and floor-life handling;
- programmed parts, security devices and key ownership;
- customer-approved alternates and requalification responsibility;
- estimated lines that require confirmation before purchase order.
Only the product owner should approve functional substitutions unless a controlled delegation is written into the order.
Define DFM, Inspection and Test Scope
DFM/DFA review can find footprint-to-BOM mismatch, polarity ambiguity, insufficient courtyards, weak panel rails, inaccessible test points and processes that need special fixtures. It does not prove circuit function.
| Method | What it supports | What it does not guarantee |
|---|---|---|
| SPI | Solder-paste deposit process control | Hidden joint integrity after reflow |
| AOI | Visible component/joint features, polarity and presence | Every hidden BGA/LGA defect or electrical function |
| X-ray | Hidden-joint, void and internal-feature evidence within defined criteria | Firmware, analog accuracy or intermittent function |
| ICT/flying probe | Electrical nets/components within fixture/program coverage | Full real-world behavior |
| Functional test | Defined powered functions and interfaces | Conditions not included in the test specification |
| Burn-in/environmental test | Behavior under the stated stress profile | Universal field reliability |
Specify sample rate or 100% coverage, acceptance limits, golden units, fixture ownership, calibration, test time, data format and failure disposition. “Functional test included” is not meaningful without these details.
Make Lead Time a Defined Schedule
Ask whether lead time begins at quote acceptance, purchase order, payment, all-files-approved, component availability or material receipt. Separate:
- engineering/DFM approval;
- PCB fabrication and stencil/tooling;
- component procurement and incoming inspection;
- assembly, programming, inspection and test;
- first-article approval or hold point;
- packing, export and transit.
An expedite promise is credible only when long-lead material and approval delays are excluded or resolved. Record whether quoted days are working or calendar days and how holidays affect them.
Use a PCB Assembly Quote Comparison Matrix
This is the article's core procurement asset. Copy it into the sourcing review and require each bidder to complete unresolved fields.
| Comparison field | Supplier A | Supplier B | Decision check |
|---|---|---|---|
| Revision/quantity/yield | Same build and accepted quantity? | ||
| PCB construction/panel | Same stackup, finish, test and depanel scope? | ||
| BOM source/alternates | Exact MPN, approved channel and substitutions? | ||
| Excess/attrition ownership | Quantity, value, storage and return rights? | ||
| Assembly processes | Same sides, SMT/THT, press-fit, hand work and cleaning? | ||
| Inspection/test | Same method, coverage, limits, fixtures and reports? | ||
| NRE/tooling | One-time, recurring, reusable and owned by whom? | ||
| Quality/traceability | Same class, records, serialization and retention? | ||
| Lead-time basis | Same start point, approvals and material assumptions? | ||
| Commercial/logistics | Currency, validity, payment, Incoterm, freight and duty? | ||
| Total landed cost | Same amortization period and risk reserve? |
Common Quote Failures
| Symptom | Root cause | Corrective action |
|---|---|---|
| Unit price rises after order | BOM, test, panel or special process was estimated | Freeze complete package and list assumptions/exclusions |
| Cheapest quote becomes most expensive | Freight, duty, NRE, excess or rework omitted | Compare total landed cost and ownership |
| Production waits for buyer answers | Polarity, alternates or test limits unclear | Close an issue log before material commitment |
| Prototype price cannot scale | Different source, process or test used for volume | Request matched pilot and volume costed BOM/process |
| Excess components disappear | Ownership/storage/return not contracted | Add line-level residual-material terms |
PCB Assembly RFQ Checklist
Files: revision index, Gerber/ODB++/IPC-2581, drill, drawing, stackup, BOM, CPL, assembly/panel drawings, schematics where needed and 3D/mechanical data.
Manufacturing: quantities, sides, SMT/THT/press-fit/manual operations, solder alloy, cleaning, coating/potting, depaneling, workmanship class, first article and change control.
Sourcing/test: approved sources/alternates, consigned-part condition/attrition, programming/security keys, inspection and test coverage, fixtures, limits, logs, failure analysis and traceability.
Commercial: target dates, quote validity, currency, payment, Incoterm, ship-to, freight/duty, NRE ownership, excess material, warranty/rework terms and cancellation exposure.
Reference Standards and Responsibility Boundaries
- IPC-A-610 — IPC
- J-STD-001 — IPC
- J-STD-020 — JEDEC/IPC
- J-STD-033 — JEDEC/IPC
- IPC-7351 — IPC
- IPC-2581 — IPC
- IPC-2221 — IPC
- IPC-6012 — IPC
State the applicable revision, class and customer addenda in the order. IPC acceptance or soldering requirements do not certify the final product to CE, UL, automotive, medical, aerospace or other market regulations.
HILPCB can quote PCB fabrication, approved component sourcing, assembly and defined inspection/test operations from a released package. The written quotation and purchase order control the actual capabilities, sources, schedule, documentation and included scope. The customer remains responsible for design function, approved substitutions, product qualification and final regulatory compliance.
How HILPCB Supports a Comparable Quote
Use PCB assembly services as the starting scope, then choose turnkey PCB assembly when HILPCB is to source boards and components under the approved BOM, or specify consigned/partial-turnkey responsibility explicitly. SMT assembly and through-hole assembly requirements should identify packages, side count, solder process and special handling.
Submit the revision-controlled RFQ through the HILPCB quote page. HILPCB will confirm manufacturability questions, sourcing assumptions, included processes and commercial terms before order release.
FAQ
What files are needed for an accurate PCB assembly quote?
Provide fabrication data and drawing, BOM with exact MPNs, pick-and-place/CPL, assembly and panel drawings, quantity breaks, inspection/test/programming requirements, quality/traceability needs and shipping terms.
Why do two PCB assembly quotes differ so much?
They may use different component sources, yields, panelization, test coverage, NRE amortization, excess-material treatment, lead-time assumptions or logistics. Normalize these fields before comparing unit price.
Are unused component reels included in the quoted unit price?
Not necessarily. MOQ/SPQ or full-reel purchases can leave excess stock. The quote or contract should state who pays, owns, stores, returns or disposes of it and whether it can be reused.
Does AOI mean the assembled PCB has been functionally tested?
No. AOI checks defined visible assembly features. Functional test applies power and verifies specified behavior with a documented fixture, software, limits and coverage; it must be quoted separately unless explicitly included.
Conclusion
The best PCB assembly quote is the most decision-ready, not automatically the lowest. Freeze the data package, normalize sourcing, NRE, test, schedule and landed cost, then place the order only after assumptions are closed. Send HILPCB the complete RFQ package for a comparable fabrication and assembly quotation.