Small-run PCBA carries many of the same fixed steps as a big run (stencils, machine programming, first-article checks, DFM/test planning). Because those fixed tasks are spread over fewer units, per-board price climbs unless you plan quantity and testing deliberately.
A simple cost formula (and a worked example)
Formula (per order):
Total = NRE/setup + (BOM × markup) + assembly labor/machine + testing/programming + packaging/shipping + (optional rush)
Henway specifics built-in:
- NRE/setup: Henway charges one-time stencil (~$300). No line setup, loading, or consignment fees.
- BOM markup: Typical market 5–100%. Henway ~20–50% (can be as low as ~5% at higher committed volumes).
- Assembly cost drivers: Placement count (machine time is often ~30% of total), and any human-touch steps (through-hole, rework, special handling).
- Testing: Billed by the minute at hourly consulting rate; if a board takes 1 minute, you’re charged 1 minute.
- Rush: Optional; increases labor prioritization + logistics.
Worked example (illustrative)
Assumptions: 25 boards; raw BOM $80/board; Henway markup 30%; assembly $25/board; 2 minutes test/board at $125/hr; stencil $300; shipping/packaging $85.
- Stencil (one-time): $300
- BOM: $80 × 25 = $2,000 → with 30% markup = $2,600
- Assembly: $25 × 25 = $625
- Test: 2 min/board × $125/hr = $4.17/board → $104.17
- Ship/pack: $85
Order total: $3,714.17 → $148.57 per board
How quantity changes per-unit cost (same assumptions):
| Qty | Order Total | Cost/Board |
| 5 | $1,050.83 | $210.17 |
| 25 | $3,714.17 | $148.57 |
| 100 | $13,701.67 | $137.02 |
1) Setup Costs Don’t Scale Down (NRE)
- Stencil creation and first-article checks are “fixed”; spreading them over 5 vs 100 boards changes per-unit dramatically.
- Henway: charges stencil only (~$300) one time; no machine programming, feeder loading, or consignment surcharges.
SEO angle: target “NRE/setup fees PCBA,” “prototype PCB assembly cost,” “small-run PCBA pricing.”
2) Component Sourcing Challenges (BOM realities)
- BOM often ≥50% of total cost on small runs.
- Price breaks: start ~100 pcs, and drop quickly 1k–10k for many ICs. For passives (R/C), Digi-Key/Mouser pricing can be just as good; for specialty ICs, manufacturers may require 1k–10k MOQs.
- Henway markup: typically 20–50%, down to ~5% at higher volume commitments.
SEO: “low-volume PCB parts cost,” “BOM price breaks PCB,” “turnkey BOM markup.”
3) Assembly Complexity (machine vs human)
- Machine placements drive ~30% of total on many builds; dense layouts/fine-pitch/BGA add time and inspection.
- Through-hole or any hand ops = major cost multipliers (SMT vs TH can be ~100:1 in speed).
- Double-sided reflow, selective solder, conformal coat, cleaning, odd-form parts all add steps.
SEO: “BGA assembly cost,” “mixed SMT/through-hole cost,” “selective solder pricing.”
4) Testing & Inspection (right-size it)
- AOI, power-on, programming, and functional test protect yield when quantities are small (every board matters).
- Henway: testing billed by the minute at our hourly rate; bring your gear—we’ll set up your test equipment in our lab when required.
- Tip: Start with AOI + power-on + firmware load, then add FCT as the design matures.
SEO: “AOI cost,” “functional test NRE,” “programming fee per board.”
5) Engineering & DFM Review (pay a little, save a lot)
- Standard DFM checks: part fit/procurability + fab DFM (vendor automated) are included; consulting to resolve issues is free.
- Paid only when Henway must modify design files (layout/ECAD edits) — handled as a scoped engineering service.
- Typical catches: footprints, polarity, panelization, fiducials, stencil aperture tweaks, test-point coverage.
SEO: “DFM review included,” “PCB DFM checklist,” “avoid prototype respins.”
6) Lead Time & Rush Economics
- Expedited queues increase labor costs and premium freight on parts.
- Plan timeline across parts → fab → assembly → test → ship.
- Henway can quote standard vs. expedite vs. hot-rush; rush is optional and priced according to priority and logistics complexity.
SEO: “rush PCB assembly cost,” “expedite lead time PCBA.”
7) Packaging & Shipping (protect yield you just paid for)
- Small runs still need ESD bags, desiccant/HIC, labels/serialization, protective foam, sturdy outer cartons.
- Domestic carrier choice, speed, and insurance affect cost; total is small but non-trivial on very low quantities.
- Henway: standard ESD-safe packing for small orders; insured shipping available on request.
SEO: “how are PCBs shipped,” “ESD packaging small orders.”
8) Quantity Strategy (prototype → pilot → first production)
- Use quantity to spread fixed costs and create a yield buffer without over-risking a respin.
- A common path: 5–10 proto → 25 pilot → 100 pre-prod, then jump when BOM/DFM are stable.
- Your BOM structure and IC availability determine break-even—ask us to model with your actual parts.
SEO: “how many prototypes to order,” “pilot run PCB cost.”
9) File Prep & Requirements (avoid delays)
- Send BOM (Excel), Gerbers, XY/centroid, assembly drawing, README (specials, “do-not-pop,” programming steps).
- Clear alternates list (AVL) helps us hold cost/lead time if a part blips.
SEO: “files required for PCB assembly,” “centroid file what is it.”
10) Transparent Pricing Examples & CTAs
- Publish an anonymized example (like the one above) to show math and set expectations.
- Clear next steps: Upload BOM/Gerbers for a same-day estimate or book a 15-minute review.
SEO: “how do you calculate PCB assembly cost,” “PCB quote checklist.”
Quick comparison tables
A) Cost breakdown template (fill with your job’s numbers)
| Line Item | How it’s calculated | Henway notes |
| NRE/Stencil | One-time per design | ~$300; no line setup/loading/consignment fees |
| BOM | (Unit cost × qty) + markup | 20–50% typical, down to ~5% at volume |
| Assembly | Machine time + ops | Placement count ~30% of total on many builds; TH/hand ops add cost |
| Testing/Prog | Minutes per board × hourly rate | Billed by the minute; bring equipment, use our lab |
| Packaging/Ship | ESD + carrier + insurance | Standard ESD-safe packing; insured shipping on request |
| Rush (optional) | Queue priority + logistics | Priced by urgency and logistics |
B) Quantity vs per-unit (same build, see example above)
| Qty | Order Total | Cost/Board |
| 5 | $1,050.83 | $210.17 |
| 25 | $3,714.17 | $148.57 |
| 100 | $13,701.67 | $137.02 |
FAQ
What’s included in Henway’s setup fees?
Just the stencil (~$300). We don’t charge separate programming, feeder loading, or consignment fees.
Is DFM review included?
Yes. Standard DFM checks (fit/procurability + fab DFM) and assistance to resolve issues are included. We only charge if we must edit your design files.
Can we provide our own components?
Yes, many clients do for cost control or allocation reasons. (We’ll align on yield/liability and packaging requirements.)
How is testing billed?
By the minute at our hourly consulting rate. If it takes 1 minute per board, you’re billed for 1 minute.
When do price breaks kick in?
Around 100 pcs for many lines; 1k–10k provides bigger savings on specialty ICs (often direct with the manufacturer).
What drives assembly cost up?
High placement counts, through-hole/human touch steps, fine-pitch/BGA, double-sided reflow, selective solder, conformal coat, cleaning.