How to Calculate Tooling Cost per Piece

Tooling cost per piece is the cost of a die, mould, jig or fixture divided over the number of pieces it will make, plus the cost of keeping it running. The simple version is tool cost divided by planned volume. The fuller version adds maintenance and the cost of the money tied up in the tool. Getting this number right decides whether a supplier's piece price is fair, and what the price should become once the tool has paid for itself.

This guide gives the formula, a worked example in rupees, a volume table that shows how fast the number moves when volume falls, and a checklist of what to ask a supplier. It ends with how Cost It Right keeps tool amortisation inside the cost breakup of each part.

See tooling inside your part cost. Book a demo and bring one part that needs a die or mould. See tool amortisation next to material, machine hour rate and overheads in Cost It Right. Book a Cost It Right demo or see how the product works.

What is tooling cost per piece?

Tooling cost per piece is the share of a tool's total cost that each part carries. A press tool, injection mould, casting die or welding fixture is bought once but used for thousands of parts. Spreading its cost over those parts, called tool amortisation, lets a supplier recover the investment through the piece price instead of charging the full amount upfront.

It is one line in the cost breakup of a part, next to material, conversion, labour, overheads and profit. Our manufacturing cost breakdown guide shows where it sits among the other lines.

How do you calculate tooling cost per piece?

Divide the total tool cost by the number of pieces the tool is expected to make:

Tooling cost per piece = total tool cost / planned number of pieces

The planned number of pieces is the lower of two figures: the tool's life (how many parts it can make before it needs replacing) and the volume the customer will actually buy. This is where most disputes start. If a tool can make 5,00,000 parts but the programme will only buy 2,00,000, the supplier will want to spread the cost over 2,00,000.

The fuller formula adds two items a supplier will usually include:

Tooling cost per piece = (tool cost + maintenance over the life + interest on the money tied up) / planned number of pieces

What is a worked example of tooling cost per piece?

Here is an illustrative example with made-up but realistic inputs, for a progressive press tool used to stamp a steel bracket.

Simple method: Rs 6,00,000 / 3,00,000 = Rs 2.00 per piece.

Fuller method:

The simple method gives Rs 2.00 and the fuller method gives Rs 2.60, a 30% difference on the tooling line. Neither is wrong. They answer different questions, so agree with your supplier which one is in the quote.

What happens to the piece price when volume changes?

The tool cost does not change, so the tooling share per piece rises quickly when volume falls. Using the same Rs 6,00,000 tool and the simple method:

Half the planned volume doubles the tooling share. This is why a supplier who quoted at 3,00,000 pieces may ask for a higher piece price if the customer's schedule drops to 1,50,000. It is also why a buyer should ask which volume the quote assumed.

The reverse matters too. Once the tool has made its planned pieces and is paid for, the tooling line should leave the piece price. In the bracket example, a piece price of Rs 35.91 that carries Rs 2.00 of tooling (and profit charged on it) falls to about Rs 33.75 when the tool is recovered. Many buyers miss this and keep paying the amortisation after it ends.

What should you ask a supplier about tooling cost?

Before you accept a tooling line in a quote, ask for these seven things:

1. Total tool cost and who made it. A supplier's own tool room and an outside toolmaker price differently.

2. Planned pieces. Is it the tool's life or the programme volume?

3. Who owns the tool. If you pay for it, it should be yours, tagged and recorded.

4. Whether it is paid upfront, amortised in the piece price, or shared. Paying part upfront lowers the amortisation line.

5. What is added on top. Maintenance, interest and profit on tooling should be listed, not hidden in overheads.

6. What happens at the end. The price should drop when the tool is recovered, and the tool should be handed back or retired on record.

7. What happens if volume falls short. Agree the rule for a shortfall in advance.

Compare the answers with your own estimate. Our guide to supplier quote vs should-cost shows how to test each line, and supplier cost breakdown analysis shows how to read a supplier's breakup.

How do you keep tooling cost visible across many parts?

A spreadsheet works for one tool. It breaks down when you manage hundreds: each tool has its own volume, life, owner and end date, and nobody remembers to revise the price when the tool is recovered. That is where recovered tools quietly keep earning for the supplier.

Keeping tooling inside a costing system fixes this, because the tool cost sits in the same breakup as material, machine hour rate and overheads. See machine hour rate calculation for the conversion line that sits beside it, and auto component costing for how tooling fits into automotive parts.

What can Cost It Right do about tooling and piece price?

Cost It Right is a costing and sourcing platform for manufacturers and procurement teams. For tooling and piece price it can:

• Carry tool amortisation in the cost breakup of each part, across 24+ manufacturing technologies, next to material, machine hour rates, labour and overheads.

• Run tooling RFQs alongside BOM, non-BOM, raw material and capex RFQs, with a vendor portal and reverse auction.

• Compare supplier quotes against should-cost, line by line, including the tooling line.

• Raise tool amortisation alerts so a recovered tool leads to a piece price revision instead of being forgotten.

• Handle BOM change and price change: BOM, graphical BOM, ECN, simulation and impact analysis to finished-goods level, and bulk price amendments.

• Index raw material to LME rates so price movement is tracked beside tooling.

• Control and report: multi-level approvals, audit trail, and cost variance, movement, ratio and spend reports.

• Integrate: ERP, PLM and CAD integration, with an on-premise option.

For how procurement teams cut spend with this kind of detail, read procurement cost analysis to reduce expenses.

Try it on your own tool. Share one part, its tool cost and your supplier's quote, and see the amortisation and piece price side by side. Book a Cost It Right demo.