What is a good gross margin?

Whatever covers the overheads of that particular business with something left. A grocery chain running on a few per cent is healthy because its overheads per unit of revenue are tiny and its stock turns over in days; a software company at 80 % may be in trouble if its sales costs consume more than that. The number only becomes meaningful next to two others — the overhead base it has to cover, and how many times a year the capital turns over. Comparing gross margins across industries compares business models, not performance.

Should discounts be taken off revenue or added to cost?

Off revenue, so that the top line is what customers actually paid. Booking a discount as a cost inflates both revenue and expenses by the same amount, leaves the profit correct and makes every margin in the statement wrong. The same applies to returns and to credit notes: net revenue is the figure the whole income statement is proportioned against, and anything that reduces what the customer paid belongs there rather than further down.

The Gross Margin Is the Ceiling on Every Other Margin

Published 10/7/2026 · 3 min read · Business tools

Camille Laurent — Finance writer at OneKitly

Tax · Personal finance

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In short

Gross profit is revenue minus the cost of what was sold: 200,000 − 120,000 = 80,000, which is 40 % of revenue. The reason this is the first figure anyone looks at is that it caps everything below it. Rent, salaries, marketing, interest and tax are all paid from the 80,000, so a business with a 40 % gross margin cannot end the year with a net margin above 40 %, and in practice ends well below. It also sets the shape of the problem: raising the gross margin by a point adds 2,000 straight to the bottom line, while cutting overheads by a point of revenue adds the same 2,000 — but the first is usually a pricing or sourcing decision and the second is a headcount decision, and businesses reach for the second because it is closer to hand.

200,000 of revenue less 120,000 of cost of sales is 80,000 of gross profit and a 40 % margin. Everything the business spends after that comes out of the 80,000 — and out of nowhere else.

What goes into cost of sales is a policy, not a fact

Materials and the labour that touches the product belong there by common agreement, and almost everything else is a choice. Delivery drivers, warehouse staff, the depreciation of production machinery and the cost of a customer support team can each sit above or below the gross profit line depending on how a business defines its accounting policy, and moving one of them moves the gross margin by points while leaving profit untouched. This makes gross margins excellent for tracking a single company over time and poor for comparing two — check what each includes before concluding that one is better at what it does.

A fall in revenue hits the bottom harder than the top

If the cost of sales is genuinely variable, a 10 % drop in revenue to 180,000 leaves the gross margin unchanged at 40 % — but the gross profit falls from 80,000 to 72,000, and overheads of 20,000 do not fall at all. Operating profit therefore drops from 60,000 to 52,000, a fall of 13.3 % for a 10 % fall in sales, and the operating margin slips from 30 % to 28.9 %. That amplification is what operating leverage means, and it works in both directions: the same structure that magnifies a bad quarter magnifies a good one. Knowing the ratio in advance is the difference between a plan and a surprise.

Share of revenue

200,000 of revenue, from the top down
Line	Amount	Share of revenue
Revenue	200,000	100 %
Cost of sales	120,000	60 %
Gross profit	80,000	40 %

Worked with our own calculator

Gross profit calculator

Given

Revenue: $200,000.00
Cost of goods sold: $120,000.00

Result

Gross profit: $80,000.00
Gross margin: 40%

These figures are produced by the calculator below, not typed in by hand — they are recomputed whenever the tool changes.

Run it on your own figures →

Frequently asked questions

What is a good gross margin?: Whatever covers the overheads of that particular business with something left. A grocery chain running on a few per cent is healthy because its overheads per unit of revenue are tiny and its stock turns over in days; a software company at 80 % may be in trouble if its sales costs consume more than that. The number only becomes meaningful next to two others — the overhead base it has to cover, and how many times a year the capital turns over. Comparing gross margins across industries compares business models, not performance.
Should discounts be taken off revenue or added to cost?: Off revenue, so that the top line is what customers actually paid. Booking a discount as a cost inflates both revenue and expenses by the same amount, leaves the profit correct and makes every margin in the statement wrong. The same applies to returns and to credit notes: net revenue is the figure the whole income statement is proportioned against, and anything that reduces what the customer paid belongs there rather than further down.

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ExplainerOperating Margin Is the Only One That Compares Two Companies60,000 of operating income on 200,000 of revenue is 30 %. It sits between a gross margin that depends on accounting policy and a net margin that depends on debt and tax.ExplainerThe Most Quoted Margin Is the Least Comparable One50,000 of net income on 200,000 of revenue is 25 %. Two identical businesses can show 22.5 % and 15 % on the same operations, with the entire gap coming from how they are financed.ComparisonGross Margin vs Markup: The Confusion That Costs Real MoneyMargin is measured on the selling price, markup on the cost. They describe the same profit from opposite ends, they are never equal, and reading one as the other quietly removes a large slice of your gross profit.ExplainerContribution Margin, and the Break-Even That Actually MattersGross margin nets off cost of goods sold; contribution margin nets off only the costs that vary with the unit. The gap decides your break-even, your operating leverage, and how much extra volume a price cut really needs.ExplainerCost of Goods Sold Is What Left the Shelf, Not What You BoughtOpening stock 40,000, purchases 120,000, closing stock 35,000 — the cost of goods sold is 125,000, and it is larger than the purchases because the shelf gave up 5,000 of what was already there.ComparisonFIFO vs LIFO: What Actually Changes, and What Does NotFIFO and LIFO are assumptions about which cost you attach to a sale, not about which box leaves the warehouse. Worked through identical purchases and sales, they move cost of sales, inventory, profit and tax — but operating cash before tax is identical to the cent.

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