Understanding tooling and NRE charges can help buyers avoid redundant PCB manufacturing costs and improve supplier negotiations.

Purchasing bare printed circuit boards for an OEM or EMS firm often means losing money in places that aren’t immediately visible.

In the high-mix, low-to-medium-volume PCB sector – where hundreds of different part numbers may be managed across dozens of product lines – margins are won and lost in the details. And there is no detail more universally misunderstood and historically abused than tooling and nonrecurring engineering (NRE) charges.

Whether based in the US, Canada or Mexico, the supply chain mechanics remain exactly the same. Without a clear understanding of how PCB factories and traditional domestic brokers calculate and apply tooling costs, those charges are often paid twice – sometimes even three times.

It’s time to stop the money loss. Here is the unvarnished truth about NRE, how the “double charge” trap works and how to negotiate a way out of it.

What Actually Is Tooling and NRE Today?

To understand how buyers are being taken advantage of, it is first necessary to understand what is purchased when a supplier invoices for NRE.

Decades ago, tooling meant something highly physical. It involved generating photographic mylar films for every layer of a board, physical drill tapes, and custom-routed plates. The process was labor-intensive and expensive, with tooling charges averaging roughly $100 per PCB layer count.

Today, PCB manufacturing is overwhelmingly digital – no multiple layers of phototools or physical drill tapes stored in climate-controlled rooms. Tooling or NRE generally covers two specific things:

1. CAM engineering. A computer-aided manufacturing (CAM) engineer at the factory must review the files, run design for manufacturability (DfM) checks, panelize the boards and convert design data files into the specific machine code used by local drillers, routers, and imaging equipment.
2. Electrical test (ET) fixtures. For low-volume prototypes, factories use flying probe testers, which use robotic arms to test connections digitally. No physical fixture exists. For medium-to-high-volume production, however, they build a bed-of-nails or grid fixture, a physical jig made of pins that tests the entire board at once. This requires physical materials and precise drilling.

Here is the secret: CAM time is relatively cheap. A standard 4-layer board might take a skilled CAM engineer an hour or two to process. The engineer is usually a salaried position, so whether only one part number is “cammed” in a day or eight, the daily cost to the factory is the same.

The only truly expensive physical asset is the hard ET fixture for higher-volume runs. Keep this in mind because it is the key to defending the budget.

The “Hostage” Situation: How to End Up Paying Twice

The high-mix PCB buyer usually gets hit with double NRE in two specific scenarios: the “supplier switch” and the “prototype-to-production” trap.

Figure 1. Flying probe and bed-of-nails testing approaches each carry different cost and tooling implications for PCB production.

Scenario 1: The supplier switch. Let’s say a company has been buying Part #12345 from PCB supplier A for three years. The $250 NRE charge has already been paid. Then Broker or Manufacturer A gets greedy and raises the unit price, so the decision is made to move the part to Broker B.

Broker B quotes a great unit price, but at the bottom of the quote is a $250 tooling charge. When questioned, Broker B says, “We have to use our own factory, and they have to do the CAM work from scratch. We don’t have your tooling.”

This is technically true. The new factory must do the CAM work. But buyers need to understand that the traditional broker model relies on holding part numbers hostage. Because some brokers may mask which factory in China is actually building the board, the tooling can’t simply be transferred elsewhere.

Scenario 2: The prototype-to-production trap. A new board is designed and sent to a broker for 10 prototype pieces. The broker charges a $150 NRE fee for the prototype run, which uses flying probe. The board works perfectly. A month later, an order is placed for 2,000 production pieces.

The broker then sends a new invoice with an additional $350 tooling charge. Its explanation? “The prototype was done on a flying probe. For 2,000 pieces, the factory needs to build a hard electrical test fixture. That costs money.”

Again, technically true. But CAM engineering had already been charged during the prototype phase. The engineering time is effectively being billed twice, wrapped under the vague umbrella of tooling.

Beyond that, many buyers take issue with paying for electrical test tooling on repeat production orders. If the supplied files have already been proven electrically correct, the question becomes: why should the customer pay for a fixture simply to verify that the supplier’s manufacturing process is functioning properly?

As a buyer, the goal is to commoditize the tooling. Stop accepting NRE as a fixed, mandatory tax, and use these tools to negotiate.

Ask for “transfer tooling” waivers. When moving a high-mix package of established business from one broker to another, the new broker should be hungry for the volume. Do not pay tooling to switch suppliers.

Tell the new broker: “I have 50 active part numbers I want to move to you. The unit pricing looks good. But I am not paying NRE to retool parts that have been running perfectly for three years. If you want this $250,000 in annual spend, you will absorb the CAM costs at your factory.”

A transparent broker will waive those charges to win the long-term unit volume.

Ask for the “proto-to-prod” credit. When placing a prototype order, get the production tooling rules in writing before issuing the PO.

Make an agreement that any NRE paid on a prototype will be credited toward the hard tooling required for the first production run. Alternatively, if no revision changes are made between proto and production, demand that they only charge for the delta (the exact cost of the physical test fixture) rather than a blanket NRE fee that includes the CAM work already completed.

Ask for the NRE breakdown. Never accept a generic $400 tooling line item. Ask the broker to itemize it. How much is CAM? How much is the ET fixture? Is it flying probe or bed-of-nails? If a broker is opaque and refuses to break this down, it could indicate a hidden profit margin in the NRE charges. I have seen traditional brokers take a $50 CAM charge from a Chinese factory and mark it up to $300 to the OEM. Transparency is the best weapon.

But before demanding a breakdown, consider the order's overall dollar value. The larger the order value, the greater the leverage to push for transparency. Many smaller-dollar-value orders use tooling charges to push a part number over a minimum order value (MOV), so it is feasible to build and ship.

An MOV that includes tooling charges will usually yield a better piece price for the buyer and allow the factory to ship a lower-value order. But be careful when it is time to reorder that same part number, as a minimum order quantity (MOQ) might be required to maintain that same piece price.

When NRE is Actually Justified

To be a strong negotiator, it’s important to be fair. There are times when NRE is completely legitimate, and refusing to pay it will only strain supply-chain relationships. Expect to pay tooling when:

• It is a genuine first-time build. The factory has never seen these design data before and must invest hours of engineering time to panelize and prepare them.
• There is a revision change. Even a “minor” trace move requires the factory to scrap the old data, reprocess the CAM and build a brand-new electrical test fixture. A new revision is a new board.
• Complex HDI and blind/buried vias. High-density interconnect boards require significantly more engineering and complex layer-by-layer testing protocols. NRE on these will be higher, and rightly so.

The final piece of the puzzle is internal discipline. Buyers at OEMs and EMS companies are incredibly busy. Brokers know this, and they rely on the fact that an EMS buyer placing an order for 40 different boards in a single month isn't going to cross-reference every part number to see if tooling was paid two years ago.

It’s important to have a tooling ledger. Whether it is a custom field in the ERP system or a simple, shared spreadsheet for the purchasing department, it’s paramount to track the part number, revision level, date tooling was paid, broker/supplier it was paid to and the type of testing paid for (flying probe versus hard fixture).

If the ERP shows that NRE was paid on Rev B of Part 12345 in 2024 and a broker tries to slip a $200 tooling charge onto the 2026 reorder, immediately strike it from the quote.

In the high-mix, low-volume PCB world, margins are tight. Every dollar spent on redundant tooling is a dollar stripped directly from the company's bottom line.

Stop viewing NRE as a standard cost of doing business. View it as a negotiable service. Work with brokers or suppliers that clearly explain what is being paid for, demand waivers when moving established business and track tooling data meticulously. The factories are doing the hard work. Don't let the middlemen use tooling as an excuse to pick your pocket.

Greg Papandrew has more than 25 years’ experience selling PCBs directly for various fabricators and as the founder of a leading distributor. He is cofounder of DirectPCB (directpcb.com); greg@directpcb.com.

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