How do you calculate composite repair cost?

Multiply the number of repairs by cost per repair, scale by the percentage included, then add fixed setup and quality cost. With 18 repairs at $410 each, 100% included, plus $650, the variable cost is $7,380 and the total is $8,030.

What is the cost per part of composite repairs?

Total repair cost divided by parts repaired. In the example $8,030 across 18 parts is about $446.11 per part — a useful trigger point for deciding whether repair still beats scrap and remake.

When should I scrap instead of repair a composite part?

When the per-part repair cost approaches the part's remake cost or the repair can't restore structural allowables. The $446.11 per-part figure here is exactly the number you compare against new-part cost.

Why include a fixed repair setup and quality cost?

Repairs carry overhead independent of count — fixturing, controlled-cure setup, NDI calibration and inspection sign-off. The $650 fixed line spreads across the batch and is why total cost exceeds the pure variable $7,380.

What drives composite repair cost up?

Labor hours for scarf prep and lamination, controlled-cure cycle time, NDI re-inspection, and any consumables like prepreg patches and adhesive. Reducing defect count or simplifying repair scope moves the variable side most.

Composite repair cost vs. cost of scrap — how do they relate?

This calculator gives the repair side; compare it against scrap cost (lost material plus disposal plus remake). Repair wins when its per-part cost stays well under the all-in cost of scrapping and rebuilding the part.

Composites, Fiberglass & Advanced Materials calculator

Composite Repair Cost Calculator

Composite repair cost totals what it takes to bring defective laminate parts back to spec — scarfing out delaminations, patching voids, re-laminating, post-curing and re-inspecting. Quality and repair-cell leads in fiberglass and advanced composites watch this number because composite rework is labor-heavy, often needs controlled-environment cure and NDI, and can quietly exceed the value of the part. This calculator separates the per-repair variable cost from the fixed setup and quality overhead so you can see the true cost of a defect population and decide where scrapping beats repairing.

What this calculator does

Estimate repair cost for composite defects, damage, delamination, voids, or cosmetic issues.
estimating rework or repair exposure for composite parts
It computes total composite repair cost by multiplying repairs by cost-per-repair, scaling by the share included, then adding fixed setup and quality cost.

Formula used

Variable composite repair cost = composite repairs required × repair cost per composite defect × repair scope included
Total composite repair cost = variable composite repair cost + fixed repair setup and quality cost

Inputs explained

Composite defects needing repair:
Labor and material cost per repair:
Share of repairs counted in this cost:
Fixed repair setup and inspection cost:

How to use the result

Use it to cost a batch of repairs, compare repair-versus-scrap economics, or quantify the cost of a recurring defect mode.
It uses one average cost per repair; a mix of minor cosmetic touch-ups and full structural scarf repairs should be split into separate runs for accuracy.

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.
Steel mill PPI stands at 348.53 (BLS, May 2026), up 6.7% from a year earlier. New factory orders are up 2.3% year over year (Census).

Common questions

How do you calculate composite repair cost? Multiply the number of repairs by cost per repair, scale by the percentage included, then add fixed setup and quality cost. With 18 repairs at $410 each, 100% included, plus $650, the variable cost is $7,380 and the total is $8,030.
What is the cost per part of composite repairs? Total repair cost divided by parts repaired. In the example $8,030 across 18 parts is about $446.11 per part — a useful trigger point for deciding whether repair still beats scrap and remake.
When should I scrap instead of repair a composite part? When the per-part repair cost approaches the part's remake cost or the repair can't restore structural allowables. The $446.11 per-part figure here is exactly the number you compare against new-part cost.
Why include a fixed repair setup and quality cost? Repairs carry overhead independent of count — fixturing, controlled-cure setup, NDI calibration and inspection sign-off. The $650 fixed line spreads across the batch and is why total cost exceeds the pure variable $7,380.
What drives composite repair cost up? Labor hours for scarf prep and lamination, controlled-cure cycle time, NDI re-inspection, and any consumables like prepreg patches and adhesive. Reducing defect count or simplifying repair scope moves the variable side most.

Last reviewed 2026-05-12.