How is supplier audit cost calculated?

Every paid auditor day times the loaded day rate, plus travel. Four on-site days and two desk days at $1,200 is $7,200 of labor; adding $1,800 of travel gives $9,000, which is $2,250 per on-site day.

Why is there no utilization input?

Because utilization belongs in capacity planning, not invoicing. An 85% productive paid day still costs the full day rate, and the earlier formula that discounted the bill reported $5,880 where this corrected arithmetic reports $9,000.

How many prep and reporting days should I budget?

A half to a full desk day per on-site day covers most audits: document review and checklist tailoring before, report writing and corrective-action follow-up after. A clean, familiar supplier sits at the low end.

When does a remote assessment beat an on-site audit?

When the travel share is high and the risk is low. Remote work removes the travel adder and often trims days, cutting cost by half or more, at the price of not observing the process directly.

Supplier Quality, Development & Audits calculator

Supplier Audit Cost Calculator: Paid Days, Rate and Travel

Budget an on-site supplier audit from the days you actually pay for. Enter on-site days, prep and reporting days, the loaded day rate and fixed travel; the total, per-day cost and travel share come back.

What this calculator does

Budget one on-site audit from every paid day plus travel, with no utilization discount.

Formula used

Total audit cost = (on-site days + prep and report days) × loaded day rate + travel
Auditor labor = all paid days × loaded day rate
All-in cost per on-site day = total ÷ on-site days
Travel share = travel ÷ total × 100

Inputs explained

On-Site Audit Days: Days the auditor is at the supplier, opening meeting through closeout.
Prep and Report-Writing Days: Paid desk days before and after the visit for review and reporting.
Loaded Auditor Day Rate: Fully burdened cost of one auditor day, or the quoted fee.
Travel and Lodging Adder: Fixed trip cost: flights, ground transport, hotel and per diem.

How to use the result

Best suited to building an annual audit program budget, pricing on-site against remote assessment, justifying batched audits in one region.
Follow-up re-audits, corrective-action verifications and the supplier's own staff time are outside this price. It costs the audit, not the risk found; the value side needs the risk-score and escape-cost pages.

Current U.S. benchmarks

U.S. manufacturing runs at 75.7% of capacity (Federal Reserve, Aug 2026). New factory orders are up 8.5% year over year (Census).

Common questions

How is supplier audit cost calculated? Every paid auditor day times the loaded day rate, plus travel. Four on-site days and two desk days at $1,200 is $7,200 of labor; adding $1,800 of travel gives $9,000, which is $2,250 per on-site day.
Why is there no utilization input? Because utilization belongs in capacity planning, not invoicing. An 85% productive paid day still costs the full day rate, and the earlier formula that discounted the bill reported $5,880 where this corrected arithmetic reports $9,000.
How many prep and reporting days should I budget? A half to a full desk day per on-site day covers most audits: document review and checklist tailoring before, report writing and corrective-action follow-up after. A clean, familiar supplier sits at the low end.
When does a remote assessment beat an on-site audit? When the travel share is high and the risk is low. Remote work removes the travel adder and often trims days, cutting cost by half or more, at the price of not observing the process directly.

Last reviewed 2026-10-01.