How do you calculate the cost of a quote revision?

Multiply estimator hours per revision by the loaded labor rate, scale that by the billable share, then add fixed system and approval overhead. With 6 hours at $95/hr, a 40% billable share, and $180 overhead, the variable labor portion is $228 and the total revision cost is $408.

Why is the cost per unit $68 when the total is $408?

Cost per unit (per estimator hour here) divides the $408 total by the 6 estimator hours, giving $68 per hour of revision effort. It is a quick way to compare revision intensity across estimators or job types.

What is a good number of revisions per quote?

Most disciplined estimating groups target one to two revision rounds per won job. Beyond three, you are usually absorbing $400-plus per round, which is a strong signal to introduce a revision fee or tighten the original RFQ intake.

Should I charge customers for quote revisions?

If revisions routinely run several hundred dollars each, like the $408 in this example, many shops bill revisions past the second round, or fold an expected revision allowance into the first quote rather than eating it as overhead.

What does the billable revision share mean?

It is the fraction of estimator time on a revision you can actually recover or attribute to a chargeable scope change. At 40%, only $228 of the labor is treated as billable cost; the rest is non-recoverable rework you should be working to reduce.

How is this different from the original quote cost?

The original quote cost covers the first full estimate. Revision cost is the incremental burn on every change after that, and because revisions reuse less work, the system and approval overhead ($180 here) often dominates the total.

Manufacturing Sales Engineering, Estimating & Quoting Operations calculator

Quote revision cost Calculator

Quote revision cost is the fully loaded dollar amount your estimating team burns every time a customer asks for a price change, a new option, or a re-quote on revised drawings. Estimating managers and sales-engineering leads track it because revisions are invisible overhead, each one consumes senior estimator time that never shows on a router or a job cost report. When a complex fabrication RFQ goes through five or six revision rounds, the cumulative cost can quietly exceed the gross margin on the job itself. Quantifying it turns 'we re-quote a lot' into a number you can defend a revision-fee policy or a no-bid decision with.

What this calculator does

Estimate the internal cost of revising a manufacturing quote including estimator labor and approval overhead.
A sales engineering lead tracking churn on a frequently revised quote uses it to quantify what each re-estimation cycle costs the team.
It computes the fully loaded dollar cost of one quote revision by combining billable estimator labor with fixed system and approval overhead.

Formula used

Total revision cost = estimator hours x loaded rate x billable share% + system overhead
Cost per hour = total revision cost / estimator hours

Inputs explained

Estimator hours per revision:
Loaded labor rate:
Billable revision share:
System & approval overhead:

How to use the result

Use it when setting revision-fee policies, deciding whether to keep re-quoting a churning account, or building an estimating-department budget.
It assumes a flat loaded rate and a single overhead figure; it does not capture opportunity cost, the new quotes that estimator could have produced instead.

Current U.S. benchmarks

As of Sep 2026, average hourly earnings in U.S. manufacturing are $30.21 (BLS), up 3.4% from a year earlier. Burdened shop rates typically run 1.3 to 1.8 times earnings once benefits and overhead are loaded.
The U.S. prime lending rate is 7.00% (Federal Reserve via FRED, 2026-10-02). Payback and financing math should start from today's rate, not a remembered one.
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 do you calculate the cost of a quote revision? Multiply estimator hours per revision by the loaded labor rate, scale that by the billable share, then add fixed system and approval overhead. With 6 hours at $95/hr, a 40% billable share, and $180 overhead, the variable labor portion is $228 and the total revision cost is $408.
Why is the cost per unit $68 when the total is $408? Cost per unit (per estimator hour here) divides the $408 total by the 6 estimator hours, giving $68 per hour of revision effort. It is a quick way to compare revision intensity across estimators or job types.
What is a good number of revisions per quote? Most disciplined estimating groups target one to two revision rounds per won job. Beyond three, you are usually absorbing $400-plus per round, which is a strong signal to introduce a revision fee or tighten the original RFQ intake.
Should I charge customers for quote revisions? If revisions routinely run several hundred dollars each, like the $408 in this example, many shops bill revisions past the second round, or fold an expected revision allowance into the first quote rather than eating it as overhead.
What does the billable revision share mean? It is the fraction of estimator time on a revision you can actually recover or attribute to a chargeable scope change. At 40%, only $228 of the labor is treated as billable cost; the rest is non-recoverable rework you should be working to reduce.
How is this different from the original quote cost? The original quote cost covers the first full estimate. Revision cost is the incremental burn on every change after that, and because revisions reuse less work, the system and approval overhead ($180 here) often dominates the total.

Last reviewed 2026-10-02.