QMS, CAPA & Quality System Management worked example

ISO 9001 Audit Cost at 72% billable audit effort share: a worked example

This worked example runs the iso 9001 audit cost numbers for a tougher week than the baseline: 72% billable audit effort share instead of the typical 100%. Estimates the cost of an ISO 9001 audit by combining auditor-day rates with fixed certification and preparation fees.

The inputs for this scenario

  • Auditor-Days Required: 6 auditor-days (held at the documented default)
  • Certification Body Day Rate: 1,500 $/day (held at the documented default)
  • Billable Audit Effort Share: 72 % (the input this scenario stresses; the baseline uses 100)
  • Certification & Prep Fees: 3,000 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total audit cost = auditor-days x day rate x billable share + certification and prep fees.
  • Total iso 9001 audit cost works out to 9,480 $ at these inputs, and this is the headline figure for the scenario.
  • Iso 9001 audit cost per unit works out to 1,580 $ / piece at these inputs.
  • Variable iso 9001 audit cost works out to 6,480 $ at these inputs.
  • Fixed iso 9001 audit cost adder works out to 3,000 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where billable audit effort share sits at 100% and the headline result is 12,000 $, this scenario comes in 21% below the baseline at 9,480 $.
  • Use it when budgeting a Stage 1/Stage 2 certification, an annual surveillance visit, or a three-year recertification. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.

Results at a glance

  • Total iso 9001 audit cost: 9,480 $ (headline result)
  • Iso 9001 audit cost per unit: 1,580 $ / piece
  • Variable iso 9001 audit cost: 6,480 $
  • Fixed iso 9001 audit cost adder: 3,000 $

Run it with your numbers

  • To rerun this with your own numbers, open the live ISO 9001 Audit Cost calculator, set billable audit effort share to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.