Measure
Gross Margin
What is left of the selling price after the cost of producing it. The measure that connects the front of the quote-to-cash chain to the back — and the one most often confused with markup.
Also called: Gross profit margin · GP% · Contribution margin (a different thing)
Gross margin % = (revenue − cost of sales) ÷ revenue × 100
- Unit
- Percentage of revenue
- Direction
- Higher is better
- How often
- Monthly at company level; per order or per job wherever the systems allow, which is where it becomes actionable.
- Normally owned by
- Account Manager, Estimator / Cost Engineer
What it is
Gross margin is revenue minus the cost of producing what was sold, expressed as a percentage of revenue. It is the money available to cover everything else the business does — sales, administration, management, premises, finance — and to be profit afterwards.
In the quote-to-cash chain it appears twice, and the difference between the two appearances is where the value of measuring it lies. There is quoted margin, decided at the quotation, and earned margin, discovered once the job has run, been delivered, been invoiced and been paid. They are rarely the same number, and the gap is made up of small, traceable events: an estimate that was optimistic, a concession given in negotiation, scrap that was rerun, freight that was absorbed, a deduction taken at payment. Losing half of the quoted margin this way is unremarkable.
Most companies calculate the first and never calculate the second, which means the chain has no feedback loop at all.
What each term means
- Revenue
- Net sales value, after discounts and credit notes. Gross invoiced value overstates it.
- Cost of sales
- The cost of producing what was sold — material, direct labour, machine time, outside processes, and normally a share of production overhead. What is included must be defined and held constant.
- Gross profit
- Revenue minus cost of sales, in currency rather than as a percentage.
- Markup
- A different calculation: profit as a percentage of cost, not of price. Confusing the two is the most common error in pricing.
Quoted margin 24.8%, earned margin 12.6%
Worked through with real numbers.
Inputs
- Order
- 400 brackets at £17.20 = £6,880
- Estimated cost at a batch of 400
- £12.93 each = £5,172
- Machining overrun
- 12% over the estimated 6-minute cycle
- Scrap and rerun
- 12 units remade after anodising rejects
- Premium freight to recover the late delivery
- £185
- Deduction taken at payment
- £284 freight the customer claimed was included
Calculation
- Quoted margin = (£6,880 − £5,172) ÷ £6,880 × 100 = 24.8%
- Machining overrun: 12% of £5.20/part × 400 = £250
- Rerun of 12 units at full cost £12.93 = £155
- Premium freight = £185
- Actual cost = £5,172 + £250 + £155 + £185 = £5,762
- Actual revenue = £6,880 − £284 deduction = £6,596
- Earned margin = (£6,596 − £5,762) ÷ £6,596 × 100 = 12.6%
Result
A job quoted to earn 24.8% delivered 12.6% — roughly half.
How to read it
Four leaks, none of them dramatic: a cycle time 12% optimistic, twelve parts rerun, one premium freight charge, and one deduction traceable to a concession agreed verbally four months earlier and never put on the quotation. Together they removed £834 from a £1,708 expected margin. Every one of them was recorded somewhere in the business, and not one of them was visible as a margin loss until the order was reconciled end to end after the cash arrived — which is why most companies never see this number at all.
How to decide what good looks like
We do not publish benchmark figures we cannot source, because the ones in circulation compare businesses using incompatible definitions. This is the method instead.
First, settle which calculation you are using. Margin is profit over price; markup is profit over cost. A 28% markup is a 21.9% margin. Companies that set targets in one and report in the other are systematically less profitable than they believe, and this is genuinely common.
Second, define what sits in cost of sales and hold it constant. Whether production overhead, freight or warranty are inside or outside changes the percentage by several points and makes every comparison invalid if it drifts.
Then set the target from your own numbers rather than from a sector figure. Work upwards: total fixed costs ÷ expected revenue gives the gross margin needed to break even; the target is that plus the profit the business needs. This produces a number you can defend to a customer and to your own sales team.
Set it per product family or job type rather than as a single company figure. A blanket target means the easy work subsidises the hard work and you become uncompetitive on exactly the jobs you are best at.
Track quoted margin and earned margin as two separate series. The gap between them is the operational and commercial leakage, and it is the more actionable of the two numbers.
Published sector margins should be treated as context only. Cost of sales definitions vary so much between companies that comparing percentages across them mostly compares accounting policies.
Where it misleads
PitfallConfusing margin with markup
Why it happens: Both are percentages applied to a cost, and the arithmetic feels interchangeable until it is checked.
What to do instead: Margin = profit ÷ price. Markup = profit ÷ cost. To achieve a 30% margin, multiply cost by 1.4286, not by 1.30. Write the conversion on the pricing sheet.
PitfallNever measuring earned margin
Why it happens: It requires reconciling an order across estimating, production, despatch, invoicing and cash — five systems and four months.
What to do instead: Reconcile a sample of completed orders monthly rather than all of them. The pattern in twenty jobs is enough to find the leaks.
PitfallMoving costs in and out of cost of sales
Why it happens: Reclassification happens quietly during system or accounting changes.
What to do instead: Define the boundary in writing and check the definition before comparing periods. A margin that improved by three points in a month usually moved a cost rather than saved one.
PitfallReading company-level margin only
Why it happens: It is the number in the management accounts and it is easy to produce.
What to do instead: A healthy average routinely conceals a third of the order book losing money. Margin per job or per family is where the decisions are.
PitfallIgnoring the leaks after invoicing
Why it happens: Deductions, credit notes and settlement discounts land in finance long after the job is closed.
What to do instead: Include them in earned margin. A 2% settlement discount and a 1.5% deduction rate together remove more margin than most cost reduction programmes add.
PitfallChasing margin percentage rather than margin value
Why it happens: Percentage is what appears on the report.
What to do instead: A lower percentage on a much larger order can be worth more money and use capacity that would otherwise be idle. Decide on contribution in currency, then check the percentage is defensible.
How it gets gamed
Rarely dishonestly. Mostly these are things a reasonable person does when a number becomes a target.
- Reclassifying production costs as overhead so they fall below the gross margin line.
- Declining low-margin work that would have contributed to fixed costs, improving the percentage while reducing profit.
- Capitalising or deferring costs into a later period.
- Quoting on markup and reporting as margin, which flatters every quote by several points.
- Excluding freight, warranty or rework from cost of sales without saying so.
Where it fits
Common questions
›What is the difference between gross margin and markup?
Margin is profit as a percentage of the selling price; markup is profit as a percentage of the cost. A £100 cost sold at £130 is a 30% markup and a 23.1% margin. To achieve a 30% margin on a £100 cost you must sell at £142.86. Companies that set targets in markup and report in margin quietly under-price everything, and it is one of the most widespread errors in commercial practice.
›What is the difference between gross margin and contribution?
Gross margin deducts the full cost of sales, usually including a share of fixed production overhead. Contribution deducts only variable costs. Contribution is the right measure for deciding whether to take a marginal order when capacity is idle, because fixed costs are incurred either way; gross margin is the right measure for judging whether the business as a whole is viable.
›Why is our actual margin always lower than our quoted margin?
Because the quote is a plan and the margin is an outcome, and everything in between only ever removes money. Estimating optimism, negotiation concessions, scrap and rework, premium freight, credit notes and payment deductions all sit between the two. Each is small; together they routinely account for a third or more of the quoted margin.
›What is a good gross margin?
The one that covers your fixed costs and leaves the profit the business needs — which is a calculation from your own numbers, not a figure to look up. Sector comparisons are weak because what sits inside cost of sales differs so much between companies that the percentages are not measuring the same thing.
›Should you ever accept an order below target margin?
Yes, when the alternative is idle capacity and the price still contributes to fixed costs. That decision should be made on contribution, recorded with a reason, and given an explicit end — because the largest risk is not the single order but that its price becomes the reference for the next one.
›How do you find where margin is being lost?
Reconcile completed orders end to end: quoted price, actual cost, credit notes, deductions, cash received. It is laborious, which is why it should be done on a sample rather than everything. Twenty jobs is usually enough to show whether the loss is concentrated in estimating, in production, or in what happens after the invoice.
Tools that calculate this
They do the arithmetic and show the workings. If you only want the method, everything you need is on this page.
- Gross Margin CalculatorFreeWork out true gross margin, markup and contribution per product or job — including the direct costs people forget. Runs entirely in your browser. No installation, no account, no upload.
- Break-even & Pricing CalculatorFreeWork out break-even volume, break-even revenue, contribution margin, margin of safety and the price you need to hit a target profit. Handles fixed amounts and percentage-of-price costs, compares three scenarios and prints an investor-ready report. Runs entirely in your browser. No installation, no a
- Should-Cost & Programme EstimateProBuild a manufactured part's cost from first principles, then take it to programme scale with learning curves, escalation to then-year money, three-point risk and a confidence-based contingency. Crawford and Wright theory, correlated risk roll-up and AACE estimate classes. Runs entirely in your brows
- Cost Saving TrackerFreeTrack negotiated and engineered cost savings from identification to finance validation — baseline against new price, annualised run-rate, implementation cost netted off, hard against soft, and a funnel that shows exactly where savings leak. Nothing is uploaded.
Reviewed 2026-08-15. The formulas behind every CapsuleM8 tool are published in the methods reference.