Tooling Cost Amortization Calculator

Amortise over realistic sales, not tool life.

Written and maintained by Mohit PatelLast checked August 4, 2026How we build these

Currency

Tooling or mould cost

Units the tool will produce

Units you expect to sell

First order quantity

Unit price

Selling price

Tooling per unit sold

$0.38

$3.40 across the first order alone

Across the first order$3.40

Across expected sales$0.38

Across the tool's full life$0.14

Units to recover the tooling289

Tooling is recovered after 289 units. Amortising across the tool's theoretical life rather than realistic sales is the standard way this cost gets understated: the tool may last 50,000 units and the product may not.

How the Tooling Cost Amortization Calculator works

Amortising tooling across a tool's theoretical life rather than realistic sales is the standard way this cost gets understated. The tool may last 50,000 units; the product may not.

Also known as: mould cost per unit · amortise tooling over units · die and tooling cost spread

Spreading a one-off across a lifetime

Tooling is paid once and used for the life of the product, so the cost per unit depends on how many units are made over that life.

A £9,000 injection mould across 30,000 lifetime units is 30p each. Across 5,000 it is £1.80. The same tool, the same product, a sixfold difference in unit cost driven entirely by the volume assumption.

Which makes the volume assumption the most consequential input in the model and the one most often chosen optimistically. Amortising over the first order and treating later volume as upside is the conservative approach and it prevents a product being launched on a projection that never materialises.

Who owns the tool

Paying for tooling does not automatically mean owning it, and the distinction becomes important exactly when the relationship deteriorates.

Ownership should be stated in writing: who holds the tool, who may use it, what happens if you move to another factory, and how it is released. Suppliers holding tools that a customer paid for and declining to release them is a familiar dispute in offshore manufacturing.

Even with ownership agreed, physical possession matters. A tool in a factory in another country is difficult to recover in practice whatever the contract says, which is an argument for either building the relationship carefully or accepting the tool as a cost of using that supplier rather than as an asset.

Tool life and maintenance

Tools wear. A steel injection mould may be rated for hundreds of thousands of shots; an aluminium one for tens of thousands. Beyond the rated life, quality degrades and the tool needs refurbishment or replacement.

That replacement cost belongs in the amortisation for any product expected to run beyond the tool's life. A model amortising a single tool across a volume the tool cannot produce is understating the cost.

Maintenance is the smaller ongoing cost and is real: cleaning, polishing, and periodic repair. Suppliers usually absorb it and some charge, and it is worth establishing which before the first invoice arrives.

Cheap tools and expensive ones

There is usually a choice between a lower-cost tool with a shorter life and a higher-cost one that runs longer and holds tolerance better.

The arithmetic favours the cheap tool at low volumes and the expensive one at high. The crossover is calculable: the volume at which the cheaper tool's replacement cost makes the total exceed the expensive tool.

The second consideration is quality consistency. A cheaper tool that produces more variation increases the defect rate across its life, and that cost has to be in the comparison. For a first product where volume is uncertain, the cheap tool is usually right; committing to an expensive one before demand is proven is a common and expensive optimism.

When to write it off

Tooling for a discontinued product has no value, and the accounting should recognise that rather than carrying it as an asset.

The decision to discontinue should not be influenced by the tooling already paid for, which is the classic sunk cost error. Money spent on a tool is spent whether the product continues or not, and continuing a loss-making line to justify the tool compounds the loss.

The forward question is whether the product contributes going forward, ignoring the tool entirely. If it does, keep it; if it does not, stop, and write the tool off. That is uncomfortable and it is the only version of the decision that leaves the business better off.

Where to go next

The Tooling Cost Amortization question rarely arrives on its own. These are the ones that usually come with it:

Private Label Cost Calculator — Setup on the first order, or over the product's life.
Product Development Cost Calculator — The risk sits in the forecast, not the cost.
Manufacturing Cost Calculator — Setup is fixed per run, so run length is everything.
Etsy Fee Calculator — Every Etsy fee on one sale, itemised.

Not financial advice. Marketplace fees change, and they vary by country, plan and seller status. Every rate here is an editable default, not a quoted price, check the platform's current fee schedule before you price a product against it. This is not tax or business advice.

Frequently asked questions

How should tooling be amortised?

Across the units you realistically expect to sell. Using the tool's capacity produces a per-unit figure that only holds if the product succeeds beyond any reasonable forecast.

Who owns the tooling?

Whoever paid for it, in principle, and the contract decides it in practice. Paying for a mould without a written agreement about ownership is how suppliers gain leverage.

How many units to recover tooling?

Tooling divided by contribution per unit. That number, rather than the tooling cost itself, is what tells you whether the investment is sensible.

Can tooling be avoided?

Often, at first, existing moulds with custom branding, 3D-printed short runs or off-the-shelf components with custom packaging all defer the commitment until demand is proven.