How do you calculate quote margin?

Subtract estimated build cost from quoted sell price, then divide by the reference quote value. Here ($18,500 − $14,200) ÷ $18,500 = 23.2%.

What is a good margin on a fiber optic build?

Many optical assembly shops target 25-40% on quoted scope. The example's 23.2% is on the lean side and leaves little room for rework before it erodes.

What's the difference between margin dollars and margin percent?

Margin dollars is the raw profit — $4,300 here. Margin percent normalizes it against the quote value (23.2%) so you can compare jobs of different sizes.

Why use a reference quote value instead of the sell price?

They are usually the same, but the reference field lets you measure margin against a base scope value if the quote includes pass-through or excluded items you don't want in the denominator.

Quote margin vs markup — what's the difference?

Margin is profit over price (23.2% of $18,500). Markup is profit over cost ($4,300 ÷ $14,200 = 30.3%). The same job always shows a higher markup than margin.

How much can rework eat into this margin?

At 23.2%, the $4,300 cushion is thin. A few hundred dollars of unplanned re-termination on the build directly reduces both margin dollars and the percent.

Fiber Optic Cable & Photonic Interconnects calculator

Quote Margin Calculator

Quote margin is the profit a fiber optic or photonic build retains after estimated cost, expressed in dollars and as a percent of the quote. It tells an estimator whether the price on a cable assembly, connectorization job, or interconnect program actually covers material, skilled termination labor, test time, and packaging with enough left over. Sales and operations use it to vet quotes before they go out and to compare jobs on a like basis. Because optical builds carry expensive connectors and high test labor, a thin margin can vanish the moment rework or scrap appears.

What this calculator does

Calculate quote margin for fiber optic or photonic interconnect work by comparing quoted sell price with estimated cost.
Use it when reviewing quotes for patch cords, MPO trunks, fanouts, cassettes, transceiver-related assemblies, or custom photonic interconnect builds.
It subtracts estimated total build cost from the quoted sell price to get margin dollars, then divides by the reference quote value to get margin percent.

Formula used

Quote margin dollars = quoted sell price - estimated total build cost
Margin percent = quote margin dollars ÷ reference quote value

Inputs explained

Quoted sell price for optical scope:
Estimated total build cost:
Reference quote value:

How to use the result

Use it while preparing or reviewing a quote to confirm the price clears your margin floor before it goes to the customer.
It uses your estimated build cost — if that estimate omits rework, scrap, or test overruns, the margin shown is optimistic against actual results.

Current U.S. benchmarks

The producer price index for copper and brass mill shapes stands at 559.593 (BLS, May 2026), up 76.8% from a year earlier. Quotes priced off last quarter's material cost miss this move. Global copper trades at $13,484 per tonne (IMF via FRED, May 2026).
The U.S. has 11,261 computer and electronic products establishments employing about 815,443 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate quote margin? Subtract estimated build cost from quoted sell price, then divide by the reference quote value. Here ($18,500 − $14,200) ÷ $18,500 = 23.2%.
What is a good margin on a fiber optic build? Many optical assembly shops target 25-40% on quoted scope. The example's 23.2% is on the lean side and leaves little room for rework before it erodes.
What's the difference between margin dollars and margin percent? Margin dollars is the raw profit — $4,300 here. Margin percent normalizes it against the quote value (23.2%) so you can compare jobs of different sizes.
Why use a reference quote value instead of the sell price? They are usually the same, but the reference field lets you measure margin against a base scope value if the quote includes pass-through or excluded items you don't want in the denominator.
Quote margin vs markup — what's the difference? Margin is profit over price (23.2% of $18,500). Markup is profit over cost ($4,300 ÷ $14,200 = 30.3%). The same job always shows a higher markup than margin.

Last reviewed 2026-05-12.