How to Reduce PCB and PCBA Prototype Costs Without Compromising Quality

Rising material costs, component shortages, and increased manufacturing expenses mean prototype development can quickly become a significant investment. The good news is that there are several ways to reduce PCB and PCBA prototype costs without compromising quality, reliability, or performance.

Before looking at ways to reduce costs, it is helpful to understand why PCB and PCBA prototypes are often more expensive on a per-unit basis than production quantities.

Why are PCB and PCBA prototypes more expensive?

Minimum Order Quantities (MOQs)

Minimum order quantities are fairly common with PCB materials and components, especially if the required material or part is uncommon or bespoke. These minimum purchase requirements can significantly increase the cost of prototype builds.

Machine set up time & Programming time

Depending on your product requirements, machine set up could take up a large part of the manufacturing time. For some bigger CEMs the time to prep isn’t worth the time to manufacture unless it’s confirmed the prototypes will be turning into large volume orders in the future. In some cases, the setup and programming costs can exceed the actual manufacturing cost of the prototype itself.

Additional Prototype Expenses

PCB tooling is required for all new PCB designs entering production. This process involves their engineering team panelising your data to fit as efficiently as possible on the required panel size and on their machines. It is during this process they will process any digital or physical artworks needed for manufacture.

Stencils are another essential requirement for PCB assembly; without a stencil you wouldn’t be able to print the solder paste needed for the assembly process.

For both tooling and stencils these will add additional costs however If the design is approved and moves into production without revision, both can typically be reused, eliminating this cost on future orders.

FAIRs and other forms of testing, such as micro section analysis, may be required for first-time orders. Some customers and industries will require additional testing and a FAIR report to ensure compliance with relevant specifications and to ensure the product is performing as they hoped. This Is particularly important to get correct in the prototype stage. These will add additional costs but usually it is for the first batch.

Understanding these cost drivers is the first step towards reducing prototype expenditure. By identifying where costs originate, you can make informed decisions that lower expenses without compromising quality or performance.

8 Ways to Reduce PCB and PCBA Prototype Costs

Consider Free-issue components

If materials or components have large minimum order quantities (MOQs), purchasing a larger quantity upfront can often reduce the overall cost per prototype. Buying a larger quantity will get you a cheaper unit price which reduces your prototype costs. Although the initial outlay can be more expensive, if you are sure the material and components are going to be used in the production batch once the prototype has been approved, this could be a good option. You can either purchase yourself and free issue to your manufacturer or ask the manufacturer to purchase for you and keep hold of the stock.

Choose a specialist manufacturer

Choosing a manufacturer that specialises in your type of product you are wanting such as a flex PCB makes all the difference. Their knowledge and expertise will deliver better DFM advice, reduce the risk of costly design mistakes and will offer faster troubleshooting. They will also have better purchasing power as they will have better existing relationships with the required material suppliers.

Consider Multipanel Manufacturing

It can be worth asking your PCB supplier about multipanel manufacturing. This can help reduce costs as your PCB is manufactured on the same mother panel as other PCBs. The cost is decreased because you’re sharing material costs and tooling costs and you’re not creating unnecessary wastage which is also great for the environment.

Design for Manufacture (DFM)

Having your design reviewed before production can identify unnecessary complexity, difficult component placements, or material choices that increase manufacturing costs. A DFM review early in the process can reduce both prototype costs and future production costs.

Provide Accurate Pick-and-Place Data

Pick-and-place data allows PCB assemblers to programme placement machines quickly and accurately. You can usually get your PCB designer to provide this data to give to your CEM. If you are not able to provide this data, do not worry this can be manually inputted onto the machine, however providing this data does save manufacturing time therefore saving you money.

Select the right stencil type

Many PCBA manufacturers will by default quote you for a tooled stainless-steel stencil, this is preferred because it fits on the manufacturer’s printer. There are other options such as a smaller stainless steel for bench printing, this is cheaper due to the size and reduced set up time. There are also acetate stencils for bench printing, this material is considerably cheaper than stainless steel but has a much shorter lifespan. If you are going through design changes, there isn’t much point ordering full-size stainless-steel stencils for a one-off then changing the design and making the stencil useless.

Rework before re-manufacturing

Don’t keep getting one-off boards manufactured with small design tweaks, ask for them to be reworked. There are many things that can be done to test design changes before permanently implementing them. Cut tracks, wire links and changing components can all be done after the PCB is assembled, letting you test new changes and saving both time and money. Once you have tested these changes then you can get a new PCB manufactured without all that extra cost in between.

Ask your manufacturing partner for advice

Don't hesitate to ask your manufacturing partner for advice. They manufacture every day and will have the knowledge to give you personalised advice on what is best for your product. Be honest and tell them you are wanting their advice on how to keep costs down and would like their expert opinions. They could offer alternative materials, components, solder paste, solder wire which have the same specifications to what you need but are cheaper. Manufacturers also can get better prices with certain suppliers so keep an open mind when given suggestions.

Prototype costs can often seem high compared to production quantities, but understanding where those costs come from makes it easier to manage them effectively. By working closely with your manufacturing partner, providing complete design data, considering multipanel options, and exploring rework opportunities, you can significantly reduce prototype costs without sacrificing quality.

If you're planning a new PCB or PCBA project and would like advice on cost-effective prototyping, the team at Advanced Assembly Solutions can help identify the most suitable manufacturing approach for your design.