How do you calculate total tooling repair cost?

Multiply repair incidents by the average cost per repair, weight that by the in-house share, then add the outside vendor flat charge. With 12 repairs at $650, a 75% in-house share and an $800 vendor flat, the variable part is $5,850 and the total is $6,650.

What is the cost per repair incident?

It is total repair cost divided by the number of incidents. In the worked example, $6,650 over 12 incidents is $554.17 per repair, which folds the vendor flat back across every incident.

What counts as a good tooling repair cost per incident?

There is no universal number — it depends on tool complexity — but a cost per incident that keeps creeping up run over run is the real warning sign. When cumulative repair cost approaches a large fraction of a replacement tool, retirement usually wins.

Should I repair or replace a worn tool?

Track cumulative repair spend against new-tool cost. Once repairs are frequent and the per-incident cost is high relative to a fresh tool amortized over its life, replacement is typically cheaper and more predictable.

Why separate fixed and variable repair cost?

The variable part ($5,850 here) scales with how many repairs you do and how much stays in-house; the fixed vendor flat ($800) is a lumpy charge that doesn't move with incident count. Separating them stops one big outside invoice from distorting your per-repair trend.

How does in-house share affect the number?

The in-house share weights the variable repair cost. At 75% you're only charging 75% of the raw incident cost into the variable line — dropping the share cuts the variable total and shifts more reliance onto the fixed vendor flat.

Tooling, Fixtures, Dies & Mold Economics calculator

Tooling Repair Cost Calculator

Tooling repair cost is the total money a shop spends keeping dies, fixtures, and molds in service — including in-house crib labor and outside vendor rework. Tooling engineers, maintenance leads, and cost estimators track it to decide when a worn tool is cheaper to replace than to keep patching. This calculator separates the variable portion (incidents times per-repair cost, weighted by how much you keep in-house) from a fixed vendor flat charge, then divides by incident count to give a true cost per repair. That split is what tells you whether your repair spend is scaling with volume or being dominated by one big outside job.

What this calculator does

Estimate the cost of unplanned tooling and die repairs from incident frequency and average fix cost.
A stamping shop tallies expected repair spend on an aging die set to justify a replacement decision.
It computes total tooling repair cost by weighting incidents times per-repair cost by the in-house share and adding a fixed vendor flat charge, plus the cost per repair incident.

Formula used

Total repair cost = repair incidents x cost per repair x in-house share% + vendor flat
Cost per repair incident = total cost / repair incidents

Inputs explained

Tooling repair incidents per period:
Average cost per repair incident:
Share of repairs done in-house:
Outside vendor flat charge:

How to use the result

Use it during tool life-cycle reviews, maintenance budgeting, or when building a make-versus-buy case on a tool that keeps coming back to the crib.
The in-house share is applied as a single blended weight, so it assumes your in-house and vendor repairs cost roughly the same per incident; if vendor jobs are far pricier per repair, model them separately.

Current U.S. benchmarks

The producer price index for plastic resins and materials stands at 319.371 (BLS, May 2026), up 19.5% from a year earlier. Quotes priced off last quarter's material cost miss this move.
The U.S. has 14,378 furniture and related products establishments employing about 355,594 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate total tooling repair cost? Multiply repair incidents by the average cost per repair, weight that by the in-house share, then add the outside vendor flat charge. With 12 repairs at $650, a 75% in-house share and an $800 vendor flat, the variable part is $5,850 and the total is $6,650.
What is the cost per repair incident? It is total repair cost divided by the number of incidents. In the worked example, $6,650 over 12 incidents is $554.17 per repair, which folds the vendor flat back across every incident.
What counts as a good tooling repair cost per incident? There is no universal number — it depends on tool complexity — but a cost per incident that keeps creeping up run over run is the real warning sign. When cumulative repair cost approaches a large fraction of a replacement tool, retirement usually wins.
Should I repair or replace a worn tool? Track cumulative repair spend against new-tool cost. Once repairs are frequent and the per-incident cost is high relative to a fresh tool amortized over its life, replacement is typically cheaper and more predictable.
Why separate fixed and variable repair cost? The variable part ($5,850 here) scales with how many repairs you do and how much stays in-house; the fixed vendor flat ($800) is a lumpy charge that doesn't move with incident count. Separating them stops one big outside invoice from distorting your per-repair trend.

Last reviewed 2026-05-12.