PCB Assembly Service Cost | SMT vs Through-Hole Pricing 2026

Key Takeaways

• SMT assembly costs $0.02–$0.10 per solder joint (automated) vs through-hole $0.05–$0.25 per joint (manual/semi-automated) — SMT is 50–70% cheaper for high component counts

• Setup fees ($50–$500) include programming pick-and-place machines, creating stencils, and first article inspection — amortized across quantity, making low-volume (<50 units) significantly more expensive per board

• Volume pricing follows steep curve: prototypes (10 units) $20–$50/board, small batch (100 units) $5–$15/board, production (1,000+ units) $2–$8/board for typical complexity

• China vs USA: Chinese PCBA services 60–80% cheaper ($5–$15/board vs $25–$50/board for 100 units) but require 2–4 week shipping; USA services offer 1–2 week turnaround with domestic support

• Component sourcing markup: 10–30% above Digi-Key/Mouser pricing for turnkey assembly (service purchases components); consigned assembly (you provide components) eliminates markup but adds procurement burden

Introduction: Understanding PCB Assembly Costs

PCB assembly (PCBA) is the process of soldering components onto a bare PCB. Costs depend on:

1. Assembly method: SMT (surface-mount technology), through-hole, or mixed
2. Component count: More components = more solder joints = higher cost
3. Board complexity: Single-sided vs double-sided, fine-pitch components (0201, BGA, QFN)
4. Production volume: Setup fees amortized across quantity
5. Component sourcing: Turnkey (service buys parts) vs consigned (you provide parts)
6. Service location: China (low cost, long lead time) vs USA/Europe (higher cost, fast turnaround)
7. Additional services: Stencil, testing, conformal coating, programming

This guide explains each cost component and provides pricing benchmarks for different scenarios.

For context on complete PCB project costs (fabrication + assembly), see our guides: PCB manufacturing cost, PCB prototype cost, and How much does it cost to manufacture a PCB.

PCB Assembly Cost Components

1. Setup Fees (One-Time per Order)

Setup fees cover the labor to prepare the assembly line for your specific board.

What’s included:

• Pick-and-place programming: Create machine program for component placement (30–60 minutes engineering time)

• Stencil fabrication: Laser-cut or electroformed stencil for solder paste application ($25–$100)

• First article inspection: Verify first assembled board meets specifications (X-ray for BGAs, AOI for general inspection)

• Feeder setup: Load component reels into pick-and-place machine feeders (5–10 minutes per unique component type)

Typical setup fees:

Key insight: Setup fees are independent of quantity. Ordering 10 boards vs 100 boards has the same setup fee, which is why per-board cost drops dramatically with volume.

Example:

• Setup fee: $200

• Order 10 boards: $200 / 10 = $20 per board (setup cost alone)

• Order 100 boards: $200 / 100 = $2 per board (setup cost alone)

2. Assembly Labor Cost (Per Board)

Assembly labor is the cost to actually solder components onto each board.

SMT assembly (automated):

• Cost: $0.02–$0.10 per solder joint

• Speed: Pick-and-place machines place 10,000–30,000 components per hour

• Formula: (Number of components × pins per component × $0.02–$0.10)

Through-hole assembly (manual or semi-automated):

• Cost: $0.05–$0.25 per solder joint

• Speed: Manual soldering ~100–300 joints per hour

• Formula: (Number of through-hole pins × $0.05–$0.25)

Examples:

Example 1: Simple SMT board

• 50 SMT components (average 4 pads each) = 200 solder joints

• Labor cost: 200 × $0.05 (mid-range) = $10 per board

Example 2: Complex SMT board

• 200 SMT components (average 8 pads each) = 1,600 solder joints

• Labor cost: 1,600 × $0.05 = $80 per board

Example 3: Through-hole board

• 30 through-hole components (average 8 pins each) = 240 joints

• Labor cost: 240 × $0.15 (mid-range) = $36 per board

Example 4: Mixed assembly (SMT + through-hole)

• 80 SMT components (320 joints) = 320 × $0.05 = $16

• 15 through-hole components (60 joints) = 60 × $0.15 = $9

• Total labor: $25 per board

3. Component Sourcing (Per Board)

Most PCBA services offer turnkey assembly (service purchases components) or consigned assembly (you provide components).

Turnkey assembly markup:

• Markup percentage: 10–30% above distributor (Digi-Key, Mouser, Arrow) pricing

• Why markup: Service’s overhead (procurement labor, inventory management, risk of obsolete parts)

• Convenience: Service handles entire BOM sourcing, verifies component availability

Example BOM cost:

• Distributor price (Digi-Key): $15.00 per board

• Turnkey markup (20%): $15.00 × 1.20 = $18.00 per board

• Total component markup: $3.00 per board

Consigned assembly (you buy and ship components):

• No markup: You pay distributor price only

• Risk: You must verify component authenticity, handle shipping, and absorb cost if parts are wrong

• Best for: High-volume production (save 10–30% on components), or when using proprietary/specialty parts

4. Stencil Fee (One-Time or Amortized)

Stencil is a thin metal sheet with openings for solder paste application.

Stencil types:

• Laser-cut stainless steel ($25–$50): Standard for most projects, 0.004″ (0.1mm) thickness

• Electroformed nickel ($100–$200): High-precision for fine-pitch (0201, 0.4mm BGA pitch)

• Framed stencil ($75–$150): Mounted in frame for automated printing

Pricing models:
1. Included in setup: Many services include stencil in setup fee (common for prototype)
2. Separate charge: $25–$100 added to first order, reused for repeat orders
3. Amortized: Cost spread across quantity (e.g., $50 stencil / 100 boards = $0.50 per board)

5. Testing and Inspection (Per Board)

Testing levels:

Standard testing (included in most quotes):

• Visual inspection (free)

• AOI for SMT (often included or $0.50–$1.00)

Optional testing (requested by customer):

• X-ray for BGA (add $1.00–$3.00 per board)

• Flying probe for low-volume (add $2.00–$5.00 per board)

• ICT for high-volume production (add $5.00–$15.00 per board + fixture NRE $500–$2,000)

6. Additional Services (Optional)

SMT vs Through-Hole vs Mixed Assembly Cost Comparison

SMT Assembly (Surface-Mount Technology)

Process:
1. Apply solder paste via stencil
2. Place components with pick-and-place machine (automated)
3. Reflow oven melts solder (entire board at once)

Cost drivers:

• Labor: $0.02–$0.10 per joint (automated, fast)

• Setup: $150–$300 (programming, stencil)

• Equipment: High-speed pick-and-place machines

Advantages:

• Cheapest for high component count: 200 SMT components faster than 50 through-hole

• Double-sided assembly: Can place components on both sides

• Small components: 0201, 0402 resistors/capacitors (through-hole limited to larger sizes)

Disadvantages:

• Setup cost: Higher setup fees (stencil, programming)

• Minimum order: Some services require minimum 5–10 boards to justify setup

Best for: Modern electronics (microcontrollers, ICs, passives), high component density, production volumes

Through-Hole Assembly

Process:
1. Insert component leads through holes in PCB
2. Solder manually (hand soldering) or with wave soldering machine (automated for simple boards)

Cost drivers:

• Labor: $0.05–$0.25 per joint (manual or semi-automated, slow)

• Setup: $50–$150 (less than SMT, no stencil or complex programming)

• Equipment: Soldering irons or wave soldering machine

Advantages:

• Lower setup cost: No stencil, simpler programming

• Stronger mechanical connection: Through-hole joints more robust (good for connectors, high-stress components)

• Easier rework: Easier to desolder and replace components

Disadvantages:

• Higher labor cost: Manual soldering 3–5× slower than automated SMT

• Limited density: Cannot place components as close together (holes take space)

• Single-sided only: Through-hole components only on one side (though SMT can be on both sides of through-hole board)

Best for: Legacy designs, high-power components (large capacitors, transformers), connectors, low-volume hobbyist projects

Mixed Assembly (SMT + Through-Hole)

Process:
1. SMT assembly first (solder paste, pick-and-place, reflow)
2. Through-hole assembly second (insert, hand solder)

Cost drivers:

• Labor: SMT cost + through-hole cost (additive)

• Setup: $200–$400 (both SMT and through-hole setup)

• Two-stage process: Longer lead time

Typical scenario:

• SMT components: ICs, passives, small connectors

• Through-hole components: Large connectors (DB-9, barrel jack), electrolytic capacitors, mechanical switches

Cost comparison example (100 boards):

Key takeaway: SMT is most cost-effective for component-dense boards. Through-hole adds significant labor cost.

Volume Pricing: How Cost per Board Decreases

Setup fees are amortized across quantity, creating a steep cost curve.

Prototype (10 boards)

Typical board: 100 SMT components, double-sided, 4-layer

Cost breakdown:

• Setup fee: $250

• Assembly labor: $10 per board × 10 = $100

• Components (turnkey): $20 per board × 10 = $200

• Testing (AOI): $1 per board × 10 = $10

• Total: $250 + $100 + $200 + $10 = $560

• Per board: $560 / 10 = $56.00

Small Batch (100 boards)

Same board:

• Setup fee: $250 (same as before)

• Assembly labor: $10 per board × 100 = $1,000

• Components (turnkey): $18 per board × 100 = $1,800 (bulk pricing discount)

• Testing (AOI): $0.50 per board × 100 = $50

• Total: $250 + $1,000 + $1,800 + $50 = $3,100

• Per board: $3,100 / 100 = $31.00 (45% cheaper than prototype)

Production (1,000 boards)

Same board:

• Setup fee: $250 (same as before)

• Assembly labor: $10 per board × 1,000 = $10,000

• Components (turnkey): $15 per board × 1,000 = $15,000 (production volume discount)

• Testing (AOI): $0.50 per board × 1,000 = $500

• Total: $250 + $10,000 + $15,000 + $500 = $25,750

• Per board: $25,750 / 1,000 = $25.75 (54% cheaper than prototype, 17% cheaper than small batch)

Volume Pricing Table

Key insight: Largest cost reduction occurs from 10 → 100 boards (45% savings). Beyond 1,000 boards, savings are incremental (component volume discounts).

China vs USA vs Europe: Regional Pricing Comparison

China PCBA Services

Representative services: JLCPCB, PCBWay, Seeed Studio, ALLPCB

Pricing (100 boards, 100 SMT components, 4-layer):

• Setup: $80–$150

• Assembly labor: $5–$10 per board

• Components (turnkey): $15–$25 per board (10–20% markup)

• Total per board: $8–$15

Advantages:

• Lowest cost: 60–80% cheaper than USA

• High volume: Well-suited for 1,000+ unit production

• Integrated: Many offer PCB fabrication + assembly (turnkey)

Disadvantages:

• Lead time: 2–4 weeks (shipping + production)

• Communication: Time zone differences, language barriers (improving)

• Component authenticity: Risk of counterfeit components (use reputable services)

• Minimum order: Some require 5–10 board minimum

Best for: Cost-sensitive projects, high-volume production, flexible timelines

USA PCBA Services

Representative services: Screaming Circuits, Advanced Assembly, MacroFab, Tempo Automation

Pricing (100 boards, 100 SMT components, 4-layer):

• Setup: $150–$300

• Assembly labor: $15–$25 per board

• Components (turnkey): $20–$30 per board (15–30% markup)

• Total per board: $25–$50

Advantages:

• Fast turnaround: 3–10 days (domestic shipping)

• Domestic support: Same time zone, English-speaking support

• Quality: Consistent IPC-A-610 Class 2/3 standards

• Flexibility: Low minimums (some offer 1-board runs), quick iterations

Disadvantages:

• Higher cost: 2–3× more expensive than China

Best for: Rapid prototyping, time-sensitive projects, domestic supply chain requirements, defense/aerospace (ITAR compliance)

Europe PCBA Services

Representative services: Eurocircuits, Beta LAYOUT, AISLER, Wurth Elektronik

Pricing (100 boards, 100 SMT components, 4-layer):

• Setup: $120–$250

• Assembly labor: $12–$20 per board

• Components (turnkey): $18–$28 per board

• Total per board: $20–$40

Advantages:

• EU local: No import duties within EU, GDPR compliance, CE marking support

• Quality: High standards (IPC, RoHS, REACH)

• Lead time: 1–2 weeks

Disadvantages:

• Cost: More expensive than China, comparable to USA

Best for: European customers, CE/RoHS/REACH compliance, medium-volume production

Regional Comparison Table

Real-World PCBA Cost Examples

Example 1: Arduino Uno Clone (Simple, Single-Sided)

Board specs:

• 2-layer PCB, 100mm × 68mm

• 30 SMT components (ATmega328P, passives, regulators)

• 10 through-hole components (headers, barrel jack, USB)

• Single-sided assembly

Cost breakdown (100 boards, China PCBA):

• Setup fee: $100

• SMT assembly: 30 × 4 pads × $0.05 = $6.00 per board

• Through-hole assembly: 10 × 3 pins × $0.15 = $4.50 per board

• Components (turnkey): $8.00 per board

• Stencil: $30 (amortized: $0.30 per board)

• Testing (visual): Included

• Total per board: $100/100 + $6.00 + $4.50 + $8.00 + $0.30 = $19.80

Total project cost: 100 × $19.80 = $1,980

Example 2: IoT Sensor Module (Medium Complexity, Double-Sided)

Board specs:

• 4-layer PCB, 50mm × 50mm

• 80 SMT components (ESP32, sensors, WiFi antenna, passives)

• Double-sided assembly

• 0402 passives, QFN packages

Cost breakdown (100 boards, China PCBA):

• Setup fee: $200

• SMT assembly (both sides): 80 × 6 pads × $0.06 = $28.80 per board

• Components (turnkey): $18.00 per board

• Stencil (double-sided): $50 × 2 = $100 (amortized: $1.00 per board)

• Testing (AOI): $1.00 per board

• Total per board: $200/100 + $28.80 + $18.00 + $1.00 + $1.00 = $50.80

Total project cost: 100 × $50.80 = $5,080

Example 3: High-Speed Data Acquisition Board (Complex, BGA)

Board specs:

• 8-layer PCB, 120mm × 100mm

• 250 SMT components (FPGA BGA, DDR3 RAM, high-speed ADC, passives)

• Double-sided assembly

• 0201 passives, 0.8mm BGA pitch

Cost breakdown (100 boards, USA PCBA):

• Setup fee: $500

• SMT assembly: 250 × 10 pads × $0.08 = $200.00 per board

• Components (turnkey): $120.00 per board

• Stencil (electroformed): $150 × 2 = $300 (amortized: $3.00 per board)

• Testing (AOI + X-ray for BGA): $3.00 per board

• Total per board: $500/100 + $200.00 + $120.00 + $3.00 + $3.00 = $331.00

Total project cost: 100 × $331.00 = $33,100

Note: Same board from China PCBA would cost ~$180–$220 per board but with longer lead time and communication challenges for complex design.

Turnkey vs Consigned Assembly: Cost Tradeoffs

Turnkey Assembly (Service Buys Components)

How it works:
1. You provide BOM with manufacturer part numbers (Digi-Key, Mouser, manufacturer MPNs)
2. PCBA service quotes component cost + markup
3. Service purchases components from distributors or brokers
4. Service handles incoming inspection and inventory management

Cost structure:

• Component markup: 10–30% above distributor pricing

• Convenience: No procurement labor on your side

• Risk: Service absorbs risk of obsolete/unavailable parts (will suggest alternates)

Example (100 boards):

• Digi-Key BOM cost: $15.00 per board

• Turnkey markup (20%): $15.00 × 1.20 = $18.00 per board

• Extra cost: $3.00 per board × 100 = $300 total

Best for:

• Prototypes (small BOM, not worth your time to order)

• One-time projects

• When you don’t have distributor accounts or volume discounts

Consigned Assembly (You Provide Components)

How it works:
1. You purchase all components from Digi-Key, Mouser, or other distributors
2. You ship components to PCBA service
3. Service only charges assembly labor (no component markup)

Cost structure:

• No markup: Pay distributor price only

• Risk: You absorb risk if parts are wrong, counterfeit, or insufficient quantity

• Procurement labor: You spend time ordering, verifying, and shipping

Example (100 boards):

• Digi-Key BOM cost: $15.00 per board (no markup)

• Shipping to PCBA service: $50

• Your procurement time: 2 hours × $50/hour = $100

• Savings: $300 (markup avoided) – $50 (shipping) – $100 (labor) = $150 net savings

Best for:

• High-volume production (10–30% savings significant)

• When you have distributor volume discounts

• When using proprietary or specialty components (service may not have access)

Hybrid Approach (Partial Consignment)

How it works:

• Service purchases common components (passives, standard ICs) via turnkey

• You provide specialty components (custom ASICs, high-cost FPGAs, long-lead-time parts)

Why useful:

• Avoid markup on expensive parts (e.g., $200 FPGA × 20% markup = $40 saved per board)

• Service handles commodity parts (time-consuming to order 1,000 resistors)

How to Get Accurate PCBA Quotes

What to Provide to PCBA Service

1. Gerber files (PCB manufacturing files)
2. BOM (Bill of Materials) in CSV/Excel format:
   – Columns: Designator (e.g., R1, C5, U3), Manufacturer, Manufacturer Part Number (MPN), Quantity, Description
   – Example row: R1, Yageo, RC0402FR-071KL, 1, 1kΩ ±1% 0402 resistor
3. Centroid/Pick-and-place file (XY coordinates of component placement)
4. Assembly drawings (PDF showing component locations, polarity markings)
5. Special instructions (programming requirements, conformal coating, testing needs)

Quote Request Checklist

• [ ] Gerber files uploaded (RS-274X format)

• [ ] BOM includes manufacturer part numbers (not just descriptions)

• [ ] Centroid file exported from CAD software

• [ ] Assembly drawing shows component reference designators

• [ ] Quantity specified (get quotes for multiple quantities: 10, 50, 100, 500)

• [ ] Turnaround time specified (standard vs expedited)

• [ ] Testing requirements specified (visual, AOI, X-ray, functional)

• [ ] Turnkey vs consigned specified

Typical Quote Response Time

• Automated instant quote (JLCPCB, PCBWay): 5–10 minutes (for simple boards with parts in stock)

• Manual quote (most services): 24–48 hours (engineer reviews files, checks component availability)

• Complex quote (high component count, specialty parts): 3–5 business days

Cost Optimization Strategies

1. Increase Volume to Amortize Setup Fees

Strategy: Order larger quantities to reduce per-board cost.

Example:

• 10 boards: $56.00 per board

• 100 boards: $31.00 per board (45% savings)

When to use: If you anticipate needing boards over time, order larger batch upfront.

Risk: Inventory cost, risk of design changes making boards obsolete.

2. Panelize Multiple Designs

Strategy: Combine multiple PCB designs on single panel to share setup fee.

Example:

• Design A: 50mm × 50mm (need 50 boards)

• Design B: 50mm × 50mm (need 50 boards)

• Panel: 100mm × 100mm fits 4 × Design A + 4 × Design B

• Order 13 panels → 52 of each design

• Setup fee: $200 (shared between both designs) instead of $200 × 2 = $400

Savings: 50% on setup fees.

When to use: Multiple small PCBs, or revisions of same design.

3. Use Standard Component Values

Strategy: Choose resistor/capacitor values from E24 series (common values) instead of E96 (special order).

Example:

• E96 value (2.74kΩ): $0.05 per resistor, 4-week lead time

• E24 value (2.7kΩ): $0.01 per resistor, in stock

Savings: 80% on commodity parts, faster lead time.

4. Minimize Through-Hole Components

Strategy: Replace through-hole components with SMT equivalents where possible.

Example:

• Through-hole electrolytic capacitor: $0.25 + $0.15 assembly labor = $0.40

• SMT ceramic capacitor (if voltage/capacitance suitable): $0.08 + $0.05 assembly = $0.13

Savings: 67% per component.

Limitation: Not always possible (connectors, high-voltage/high-current parts often require through-hole).

5. Consign Expensive Components

Strategy: Use turnkey for commodity parts, consign expensive parts.

Example (100 boards):

• $180 FPGA × 100 = $18,000

• Turnkey markup (20%): $18,000 × 0.20 = $3,600 markup

• Consign FPGA yourself: Save $3,600 (buy from Digi-Key directly)

When to use: Any component >$50 where markup is significant.

6. Choose China PCBA for Non-Urgent Projects

Strategy: Use China PCBA services for production runs where 2–4 week lead time is acceptable.

Example (100 boards):

• USA PCBA: $35 per board = $3,500

• China PCBA: $12 per board = $1,200

• Savings: $2,300 (66% cheaper)

Trade-off: Longer lead time, communication challenges.

Frequently Asked Questions

1. How much does PCB assembly cost per board?

Per-board cost depends on volume and complexity:

Key factors: Setup fees dominate low-volume. Assembly labor scales linearly. Components vary by BOM cost.

2. What is the difference between SMT and through-hole assembly cost?

SMT assembly (automated):

• Cost: $0.02–$0.10 per solder joint

• Speed: 10,000–30,000 components/hour (machine)

• Best for: High component count, modern designs

Through-hole assembly (manual/semi-automated):

• Cost: $0.05–$0.25 per solder joint (2–5× more expensive)

• Speed: 100–300 joints/hour (hand soldering)

• Best for: Connectors, high-power components, legacy designs

Example (100 components):

• SMT (100 ICs × 20 pads avg): 2,000 joints × $0.05 = $100 per board

• Through-hole (100 ICs × 8 pins avg): 800 joints × $0.15 = $120 per board

Takeaway: SMT cheaper for high component density. Through-hole expensive due to manual labor.

3. Is turnkey or consigned PCB assembly cheaper?

Turnkey (service buys components):

• Cost: Distributor price + 10–30% markup

• Convenience: Service handles procurement

• Best for: Prototypes, one-time projects, small BOM

Consigned (you provide components):

• Cost: Distributor price (no markup)

• Effort: You handle procurement, shipping

• Best for: High-volume (10–30% savings significant), expensive components

Example (100 boards, $20 BOM):

• Turnkey: $20 × 1.20 = $24 per board (20% markup)

• Consigned: $20 per board + $50 shipping + 2 hours labor

• Savings: $400 – $50 – $100 = $250 total ($2.50 per board)

Recommendation: Turnkey for <100 boards. Consigned for 500+ boards or expensive BOM.

4. Why is PCB assembly more expensive for low quantities?

Setup fees are independent of quantity:

• Setup: $200 (programming, stencil, first article)

• 10 boards: $200 / 10 = $20 per board (setup cost alone)

• 100 boards: $200 / 100 = $2 per board (setup cost alone)

Per-board cost components:

• Setup (amortized): Decreases with volume

• Assembly labor: Same per board regardless of quantity

• Components: Slight discount at high volume (5–20%)

Typical cost curve:

• 10 boards: $50 per board

• 50 boards: $30 per board (40% cheaper)

• 100 boards: $25 per board (50% cheaper)

• 1,000 boards: $20 per board (60% cheaper)

Diminishing returns: Beyond 1,000 boards, savings are incremental.

5. How long does PCB assembly take?

Turnaround time (after PCB fabrication):

Factors affecting lead time:

• Component availability (out-of-stock parts delay entire order)

• Board complexity (BGA requires X-ray inspection, adds time)

• Testing requirements (functional test adds 1–2 days)

6. What is included in PCB assembly setup fee?

Typical setup fee ($50–$500) includes:

1. Pick-and-place programming (30–60 minutes engineering time):
   – Import Gerber, centroid, and BOM
   – Program machine for component placement
   – Define feeder assignments

2. Stencil fabrication ($25–$100):
   – Laser-cut stainless steel stencil for solder paste application

3. First article inspection (30–60 minutes):
   – Assemble first board
   – Inspect with AOI (Automated Optical Inspection)
   – X-ray for BGA (if applicable)
   – Verify against assembly drawing

4. Feeder setup (5–10 minutes per unique component):
   – Load component reels into machine feeders
   – Verify component orientation

Setup fee is one-time per order (not per board). Repeat orders may have reduced or waived setup if design unchanged.

7. Can I get PCB assembly for just one board?

Yes, but expensive. Some services offer single-board assembly:

Services offering 1-board runs:

• MacroFab: $199 minimum + components + labor

• Screaming Circuits: $149 setup + components + labor

• Advanced Assembly: Custom quote (typically $150–$300 minimum)

Typical cost for 1 board (simple, 50 components):

• Setup: $150–$200

• Labor: $10

• Components: $20

• Total: $180–$230 for 1 board

Cost comparison:

• 1 board: $200

• 10 boards: $40 per board (5× cheaper per board)

• 100 boards: $15 per board (13× cheaper per board)

Recommendation: Order 5–10 boards minimum to make setup fee worthwhile. If you only need 1 board, consider hand assembly (DIY) or PCB assembly services targeting hobbyists (lower setup fees).

8. Do I need to provide components or can the assembly service buy them?

You have three options:

1. Turnkey (service buys everything):
   – You provide: BOM with manufacturer part numbers
   – Service buys: All components
   – Cost: Distributor price + 10–30% markup
   – Best for: Prototypes, convenience

2. Consigned (you provide everything):
   – You buy: All components from Digi-Key, Mouser, etc.
   – You ship: Components to assembly service
   – Cost: Distributor price (no markup)
   – Best for: High volume (save markup), expensive components

3. Hybrid (partial consignment):
   – Service buys: Common parts (resistors, capacitors, standard ICs)
   – You provide: Expensive or specialty parts (FPGAs, custom ASICs)
   – Cost: Reduced markup on expensive items
   – Best for: Balance of convenience and cost savings

Recommendation: Turnkey for first prototype (easiest). Consigned for production (save 10–30% on components).

9. How much does BGA assembly cost?

BGA (Ball Grid Array) assembly is more expensive than standard SMT:

Additional costs:

• Setup: +$50–$100 (X-ray inspection programming)

• Assembly labor: $0.08–$0.15 per ball (vs $0.05 for standard SMT pad)

• X-ray inspection: $1.00–$3.00 per board (required to verify solder joints under BGA)

• Rework risk: 5–10% of BGAs may need rework (adds $10–$30 per board if rework needed)

Example (100-pin BGA):

• 100 balls × $0.10 = $10.00 per BGA

• X-ray inspection: $2.00 per board

• Setup: +$100 (one-time)

• Total added cost: $12.00 per board + $1.00 setup amortization (for 100 boards)

Total BGA assembly cost: Standard SMT cost + $12–$15 per board

Why more expensive: Cannot visually inspect solder joints (hidden under package). Requires X-ray. Higher risk of defects (voids, insufficient solder).

10. What files do I need to provide for PCB assembly quote?

Required files:

1. Gerber files (PCB manufacturing):
   – All copper layers (GTL, GBL, G1, G2, etc.)
   – Soldermask (GTS, GBS)
   – Silkscreen (GTO, GBO)
   – Drill file (TXT or DRL)
   – Fabrication drawing (PDF)

2. BOM (Bill of Materials) (CSV or Excel):
   – Columns: Designator, Manufacturer, MPN, Qty, Description
   – Example: C1, Murata, GRM155R71C104KA88D, 1, 0.1µF 16V X7R 0402

3. Centroid file (component placement):
   – Columns: Designator, X, Y, Rotation, Layer
   – Exported from CAD software (Altium, KiCAD, Eagle)

4. Assembly drawing (PDF):
   – Shows component locations, reference designators, polarity marks

Optional files:

• Schematic (PDF) — helps service understand circuit

• 3D STEP model — for mechanical fit verification

• Test procedure (if functional testing required)

Most PCBA services have online quote tools: Upload files → automated quote in 5–30 minutes.

Conclusion: Understanding Your PCBA Costs

PCB assembly costs vary widely based on volume, complexity, and service location. For most projects:

Prototype (10–50 boards): $30–$60 per board (China) or $60–$120 (USA)
Small batch (100–500 boards): $15–$30 per board (China) or $30–$60 (USA)
Production (1,000+ boards): $10–$20 per board (China) or $20–$40 (USA)

Key cost drivers:
1. Setup fees: Largest impact on low-volume
2. Assembly method: SMT cheaper than through-hole
3. Component sourcing: Turnkey convenient but 10–30% markup
4. Service location: China 60–80% cheaper but longer lead time

Cost optimization strategies:

• Increase volume to amortize setup

• Minimize through-hole components

• Consign expensive parts

• Choose China PCBA for non-urgent production

For related guides, see: PCB manufacturing cost, PCB prototype cost, How much does it cost to manufacture a PCB, and China PCB manufacturer.

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