# Bug Fix Cost Calculator

> Work out what fixing a set of defects costs to fix, retest and release.

Page: https://freecalculator.tech/tools/bug-fix-cost-calculator
Last reviewed: 2026-09-16

## Formula

Hours = Defects × (Hours to fix one + Retest hours per defect); Cost = Hours × Loaded cost per hour + Release and deployment cost

- Hours = Defects × (Hours to fix one + Retest hours per defect); Cost = Hours × Loaded cost per hour + Release and deployment cost.
- Inputs used: Currency, Defects to fix, Hours to diagnose and fix one defect, Loaded cost per engineer hour, Retest and review hours per defect (optional), Release and deployment cost (optional).
- Edge handling: Defects to fix is required.; Defects to fix cannot be negative.; Defects to fix must be no more than 1000000000.; Hours to diagnose and fix one defect is required.; Hours to diagnose and fix one defect cannot be negative..

## Inputs

- Currency
- Defects to fix
- Hours to diagnose and fix one defect
- Loaded cost per engineer hour
- Retest and review hours per defect (optional)
- Release and deployment cost (optional)

## Worked example: 120 defects at 5.5 hours each

An internal failure cost built from your own defect data.
1. Start with Currency: USD, Defects to fix: 120, Hours to diagnose and fix one defect: 5.5, Loaded cost per engineer hour: 85, Retest and review hours per defect (optional): 1.5, Release and deployment cost (optional): 2500.
2. Apply the method: Hours = Defects × (Hours to fix one + Retest hours per defect); Cost = Hours × Loaded cost per hour + Release and deployment cost.
3. An internal failure cost built from your own defect data.

## Common questions

### Where does this formula come from?

ASQ, Cost of Quality — internal failure cost is the labour and rework spent correcting defects found before delivery. See the source link on this page.

### What kind of calculation is this?

Internal failure cost: the labour spent correcting defects, plus any release cost the correction triggers. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.

### What are its limits?

Counts correction cost only; it does not value the impact of the defects on customers. An average over the defects in scope, not a per-defect estimate.

### How do I use the Bug Fix Cost Calculator?

Enter the required values for Currency, Defects to fix, Hours to diagnose and fix one defect, Loaded cost per engineer hour, Retest and review hours per defect (optional), and the other fields shown. The calculator applies the formula on this page and shows the main result with any supporting breakdown so you can check the arithmetic.

### What formula does the Bug Fix Cost Calculator use?

Hours = Defects × (Hours to fix one + Retest hours per defect); Cost = Hours × Loaded cost per hour + Release and deployment cost The visible formula section above lists the calculation path and the edge cases the page handles, so the result can be checked without relying on the form alone. Check the formula, example, and limitations on this page before using the result for a real professional & industry decision.

### Can the Bug Fix Cost Calculator be used for exact decisions?

Use it as a calculation aid, not as a substitute for checking the underlying rule, contract, policy, or professional advice that applies to your situation. When a result depends on local rules, personal details, prices, or dates, enter those values yourself and confirm them before acting.

## Limitations and assumptions

- Inputs outside the supported range are rejected rather than forced into a result.
- The result depends on the values you enter for this bug fix cost calculator; it does not supply missing rates, rules, prices, dates, or assumptions for you.

## Sources

- American Society for Quality — https://asq.org/quality-resources/cost-of-quality

## Cite this page

- APA: Free Calculator. (2026, September 16). Bug Fix Cost Calculator. https://freecalculator.tech/tools/bug-fix-cost-calculator
- MLA: "Bug Fix Cost Calculator." Free Calculator, 16 Sept. 2026, https://freecalculator.tech/tools/bug-fix-cost-calculator.
- Link: Bug Fix Cost Calculator — Free Calculator, https://freecalculator.tech/tools/bug-fix-cost-calculator