PCB cost is a significant portion of the total product cost for Indian electronics companies, especially at production volumes of 100-10,000 units where economies of scale are limited. Design decisions made early in the project — board size, layer count, component selection, and manufacturing specifications — have the biggest impact on per-unit cost. This guide presents practical cost reduction techniques that maintain quality and reliability while reducing PCB fabrication and assembly costs.
Table of Contents
- Board Size and Shape
- Layer Count Optimisation
- Relaxing Specifications
- Component Cost Reduction
- Assembly Cost Reduction
- Panelisation for Cost
- Volume Pricing Strategies
- Frequently Asked Questions
Board Size and Shape
- Reduce board area — fabrication cost scales directly with area. Even 5mm reduction on each dimension can save 15-20% on fab cost
- Use rectangular shapes — irregular outlines require CNC routing instead of V-scoring, which costs more
- Standard board sizes (50×50, 100x100mm) are cheapest at budget fabricators like JLCPCB
- Thinner boards (1.0mm instead of 1.6mm) cost the same or less and reduce weight and shipping cost
- Keep board thickness standard (1.6mm) unless there is a reason to change — non-standard thickness has lead time and cost premium
Layer Count Optimisation
| From | To | Savings | Trade-off |
|---|---|---|---|
| 4-layer | 2-layer | 40-60% | No dedicated ground plane, harder routing |
| 6-layer | 4-layer | 30-50% | Less routing space, one fewer signal layer |
| Blind/buried vias | Through-hole only | 30-60% | Larger via pads, less routing density |
Before adding layers, try these routing strategies on fewer layers: use 0.15mm (6 mil) trace/space instead of 0.2mm, reduce via pad size, optimise component placement to shorten routes, and use ground pour instead of a dedicated plane.
Relaxing Specifications
| Specification | Premium | Standard | Savings |
|---|---|---|---|
| Minimum trace/space | 0.1mm (4 mil) | 0.15mm (6 mil) | 10-20% |
| Minimum drill | 0.2mm | 0.3mm | 5-15% |
| Surface finish | ENIG | HASL | ₹200-500/panel |
| Board thickness tolerance | ±0.1mm | ±10% (standard) | 5-10% |
| Impedance control | ±5% | Not controlled | 15-30% |
| Solder mask colour | Matte black | Green | ₹0-200/panel |
Only tighten specifications when the design actually requires it. A 50MHz SPI bus does not need impedance control. A hobby board does not need ENIG. Every unnecessary premium specification adds cost without benefit.
Component Cost Reduction
- Standardise passives: Use the same resistor value where possible (10kΩ pull-ups instead of different values per pin). Fewer unique parts reduces BOM lines and improves purchasing volume per part
- Reduce component count: Each component adds placement cost (₹0.5-2 per placement). Eliminating unnecessary components saves both material and assembly cost
- Use LCSC parts: Chinese-manufactured passives and ICs from LCSC are 50-80% cheaper than equivalent parts from Mouser/DigiKey for the same specifications
- Avoid minimum order quantities: Some speciality components have ₹500+ minimum orders. Find alternatives with lower MOQs or share orders with other designers
- Standard packages: 0603 passives are cheaper than 0402 for both components and assembly. Use the largest package that fits
Assembly Cost Reduction
- Single-side SMD: One reflow pass costs half of two-side assembly
- Minimise through-hole: Every THT component requires wave soldering or hand soldering — both are more expensive than SMD reflow. Convert connectors to SMD where possible
- Standard packages: Exotic packages (0201, 01005, large BGA) require special pick-and-place feeders and slower placement speed
- Consolidate assembly orders: Assembly houses charge setup fees per batch. Ordering 500 units at once is cheaper per unit than five orders of 100
- Design for assembly (DFA): Consistent component orientation, adequate spacing for pick-and-place, and clear fiducial marks reduce assembly time and errors
Panelisation for Cost
Proper panelisation reduces per-board fabrication cost by 30-60%:
- Arrange maximum boards per panel — work with your fabricator’s standard panel sizes
- V-score instead of tab routing saves material (no routing waste between boards)
- For assembly, panelisation is essential — pick-and-place machines need minimum 50x50mm work area
- Add tooling holes and fiducials to the panel rails for automated handling
Volume Pricing Strategies
| Volume | Strategy |
|---|---|
| 1-10 (prototype) | Use JLCPCB/PCBWay pooled orders. Do not optimise cost — focus on correctness |
| 10-100 (pilot) | Get quotes from 3+ manufacturers. Indian fabricators may beat import prices due to no customs duty |
| 100-1,000 | Negotiate directly with Indian manufacturers. Assembly + fabrication bundled pricing |
| 1,000-10,000 | Request volume discounts, consider partial payment advance for better pricing |
| 10,000+ | Direct factory pricing, consider Chinese manufacturers for best cost, Indian for logistics |
Frequently Asked Questions
What is the single biggest cost driver in PCB fabrication?
Board area × layer count. A 100x100mm 4-layer board costs approximately 4x more than a 50x50mm 2-layer board. Reducing either dimension or the layer count has the most dramatic cost impact.
Is it cheaper to fabricate in India or China?
For prototypes (5-10 pieces), Chinese services like JLCPCB are typically 30-50% cheaper. For production volumes (500+), Indian manufacturers become competitive when you factor in shipping time, customs duty, and communication convenience. Get quotes from both and compare total landed cost.
How much does PCB assembly cost per component?
At Indian assembly houses: ₹1-3 per SMD placement, ₹3-5 per THT component. At JLCPCB: approximately $0.004-0.01 per SMD placement (extremely cheap for standard parts). The setup fee (₹2,000-10,000 per batch) is the dominant cost for small orders.
Should I design for the cheapest manufacturing or the best quality?
Design for standard manufacturing capabilities — this gives you both competitive pricing AND reliable quality. Avoid exotic specifications unless technically necessary. A well-designed board built to standard specs is more reliable than an over-specified board built to tight tolerances at a budget shop.
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