Margin vs markup: the 40%/67% confusion that quietly underprices distributors

Key Takeaways

• Margin is profit as a percentage of selling price; markup is profit as a percentage of cost, the two formulas divide by different numbers and are never interchangeable at the same percentage figure.
• A 100% markup produces only a 50% margin, and a 200% markup produces only a 67% margin, markup is always the larger number of the two because it's divided by the smaller figure (cost, not price).
• Confusing the two when setting prices causes real underpricing: aiming for a "50% margin" but applying it as a 50% markup instead delivers only a 33.3% actual margin, a 16.7-percentage-point shortfall against the original target.
• The conversion runs both directions with simple formulas: Margin % = Markup % ÷ (1 + Markup %), and Markup % = Margin % ÷ (1 − Margin %), so a 40% margin target requires a 66.7% markup, not a 40% one.

A distributor who tells their team to "mark everything up 40%" thinking they've set a 40% margin has actually set something meaningfully lower. Margin and markup are calculated from different bases, and mixing them up isn't a rounding error, it's a pricing decision that quietly underprices every product it's applied to.

The core definitions, and why they're not interchangeable

Margin is profit as a percentage of revenue (selling price); markup is profit as a percentage of cost (Rippling, margin vs markup guide, retrieved 2026-09-08). Margin % = (Selling Price − Cost) ÷ Selling Price × 100; Markup % = (Profit ÷ Cost) × 100 (GoCardless, markup vs margin guide, retrieved 2026-09-08). Because selling price is always higher than cost (assuming any profit at all), and margin divides by the larger number while markup divides by the smaller one, markup is structurally always the bigger percentage figure for the identical dollar amount of profit. Treating the two as equivalent percentages is the error, not a simplification.

The specific numbers that show how far apart they run

A 100% markup, doubling cost to set price, produces only a 50% margin. A 200% markup, tripling cost to set price, produces only a 67% margin (Rippling, retrieved 2026-09-08). This is the gap named directly in the title: 40% margin corresponds to roughly 67% markup, not 40% markup, a distributor mixing the two up isn't off by a small amount, they're off by nearly a factor of two in the markup case.

The underpricing consequence, stated precisely

Confusing margin and markup when setting prices can cause significant underpricing: targeting a "50% margin" but applying it as a 50% markup instead results in only a 33.3% actual margin (Rippling, retrieved 2026-09-08). That's a 16.7-percentage-point shortfall against the intended target, on every single unit priced this way, compounding across an entire product catalogue if the error is baked into a standard pricing rule rather than caught once and corrected.

The two conversion formulas

Moving from markup to margin: Margin % = Markup % ÷ (1 + Markup %). A 50% markup converts to 50 ÷ 1.5 = 33.3% margin (Rippling, retrieved 2026-09-08). Moving from margin to markup, the direction that matters when a target margin is set first and a pricing rule needs to be built around it: Markup % = Margin % ÷ (1 − Margin %). A 40% target margin requires a 66.7% markup, since 40 ÷ (1 − 0.40) = 40 ÷ 0.60 = 66.7% (Rippling, retrieved 2026-09-08). For a distributor working from a target margin, this second formula is the one to apply when translating that target into an actual pricing instruction for staff.

Why this specific error concentrates in distribution

Finance teams and investors work primarily in margin, since that's the figure that appears in financial reporting and performance analysis; sales and pricing teams often work in markup, since it's the more natural calculation when pricing outward from a known cost (Rippling, retrieved 2026-09-08). A distribution business sits precisely at the intersection of these two functions, finance setting margin targets, sales or purchasing translating them into cost-plus pricing rules, which is exactly where a target set in one unit and applied in the other slips through undetected. The failure isn't usually one person's error, it's a handoff between two teams using the same word for two different calculations.

Building the fix into the pricing process

The reliable fix is procedural, not just educational: whenever a margin target is set, convert it to the equivalent markup percentage explicitly, in writing, before it reaches whoever is setting prices from cost. Never hand a "target margin" number directly to a cost-plus pricing process without that conversion step. Run your actual cost and target margin through the profit margin calculator to get the correct markup percentage before building it into a standard pricing rule or price list.

Frequently asked questions

Is a 50% margin the same as a 50% markup?

No. A 50% markup produces only a 33.3% margin, while achieving an actual 50% margin requires a 100% markup. The two percentages are never equal except at the trivial 0% case.

Which one do investors and lenders typically look at?

Margin, since it's the figure that appears in standard financial statements and is used for comparability across companies of different sizes and cost structures. If you're preparing figures for external review, confirm you're reporting margin, not markup, even if your internal pricing process is built around markup.

How do I convert my target margin into a pricing rule based on cost?

Use Markup % = Margin % ÷ (1 − Margin %). For a 40% target margin, that's 40 ÷ 0.60 = 66.7% markup on cost, meaning price should be set at cost × 1.667, not cost × 1.40.

The bottom line

Margin and markup measure the same profit dollar against two different bases, and treating their percentages as interchangeable systematically underprices whatever it's applied to. The fix costs nothing beyond one extra calculation step, converting a target margin to its correct markup equivalent before it becomes a pricing rule, but skipping that step is one of the most common, and most expensive, pricing mistakes a distribution business can make without ever noticing it happened. Building the correct conversion into a standard pricing rule, rather than re-deriving it product by product, is the kind of pricing discipline that belongs in a broader trading growth strategy as a distributor's catalogue and staff headcount both grow.

Figures and formulas were verified on 8 September 2026 against published margin and markup pricing methodology. Apply the conversion formulas to your own specific cost and target margin figures before setting a pricing policy.