How to Calculate Profit Margin and Markup

Gross profit is revenue minus the direct cost of what you sold (COGS for products, or direct job cost for many services).

Gross profit = selling price − cost

Worked example

You buy a widget for $40 and sell it for $100. Gross profit = 100 − 40 = $60.

That $60 is the dollars available to cover rent, payroll, marketing, taxes, and net profit. Gross profit is not the same as net profit; net subtracts operating expenses and other costs after the gross line.

Why start here

• Every margin and markup percent is built from these same two inputs: cost and price (or revenue)
• If cost is wrong (missing freight, packaging, payment fees), both margin and markup lie
• Per-unit gross profit times units sold estimates contribution before overhead

Track cost carefully: invoice cost + inbound shipping + duties + packaging often belongs in “cost” for pricing decisions even if your accountant capitalizes some items differently.

Gross margin answers: “What percent of the selling price is profit?”

Gross margin % = (selling price − cost) ÷ selling price × 100

Same as: gross profit ÷ revenue × 100.

Example

Price $100, cost $40: margin = 60 ÷ 100 × 100 = 60%.

Price $50, cost $35: margin = 15 ÷ 50 × 100 = 30%.

Reading the number

• A 25% margin means $0.25 of every sales dollar is gross profit; $0.75 covers cost of goods
• Higher margin % does not automatically mean more cash — a 10% margin on $1M revenue is $100k gross profit; 50% on $50k revenue is $25k
• Industry “healthy” margins vary widely (grocery vs software vs consulting)

For multi-item carts, compute margin on total revenue and total COGS, not by averaging product margin percentages unless each product has equal weight — weighted by revenue is safer. Percent change and part-whole percent patterns are covered in the how to calculate percentages guide.

Run any cost/price pair through the free online margin calculator to confirm margin % and profit dollars together.

Markup answers: “What percent of cost did I add to get to price?”

Markup % = (selling price − cost) ÷ cost × 100

Same as: gross profit ÷ cost × 100.

Same dollars, different percent

Price $100, cost $40: markup = 60 ÷ 40 × 100 = 150%.

That is still $60 profit — identical to the 60% margin case above. Only the denominator changed (cost instead of price).

Another example

Cost $25, price $40: profit = $15. Markup = 15 ÷ 25 × 100 = 60%. Margin = 15 ÷ 40 × 100 = 37.5%.

Retail habit

Many buyers and wholesale sheets talk in markup (“keystone” often means roughly 100% markup — double the cost). Finance and dashboards more often show margin of revenue. When a vendor says “50%,” ask: of cost or of price?

If a sale tag cuts the list price, margin on the final selling price drops even if your original markup plan was solid. For percent-off math after you set list price, see the discount calculator and discount guide.

Both use the same gross profit in the numerator. The difference is the base:

Measure	Formula base	Question it answers
Margin	Selling price / revenue	What share of sales is gross profit?
Markup	Cost	How much did I add on top of cost?

Why people mix them up

At low percents the numbers feel similar (20% markup is close to ~16.7% margin), so a slip is easy. At high percents they diverge hard: 100% markup = 50% margin; 200% markup ≈ 66.7% margin.

Quick comparison table (same cost $100)

• Markup 25% → price $125 → margin = 25÷125 = 20%
• Markup 50% → price $150 → margin = 50÷150 ≈ 33.3%
• Markup 100% → price $200 → margin = 100÷200 = 50%
• Margin 25% → price $133.33 → markup = 33.33÷100 ≈ 33.3%
• Margin 40% → price $166.67 → markup ≈ 66.7%

Never apply a “25% margin target” by multiplying cost by 1.25 — that is a 25% markup and only a 20% margin. Use the conversion formulas in the next section or the margin calculator conversion mode.

If you know one percentage, you can get the other without re-deriving cost and price — as long as both are expressed as decimals in the formula (25% → 0.25).

Margin → markup

Markup = margin ÷ (1 − margin)

Example: 40% margin → 0.40 ÷ (1 − 0.40) = 0.40 ÷ 0.60 ≈ 0.667 → 66.7% markup.

Example: 25% margin → 0.25 ÷ 0.75 ≈ 33.3% markup.

Markup → margin

Margin = markup ÷ (1 + markup)

Example: 50% markup → 0.50 ÷ 1.50 ≈ 33.3% margin.

Example: 100% markup → 1.00 ÷ 2.00 = 50% margin.

Sanity checks

• Margin is always lower than markup for the same deal (while both are positive and under 100% margin)
• Margin cannot be 100% or more if cost is positive — that would imply zero or negative cost
• If cost is $0 (pure digital with no COGS), margin formulas still work on revenue, but markup is undefined or infinite

Keep a small cheat sheet for your target: if leadership wants “35% gross margin,” your markup target is 0.35 ÷ 0.65 ≈ 53.8% on cost.

When cost is known and you want a specific gross margin percentage:

Selling price = cost ÷ (1 − target margin)

Examples

Cost $40, target margin 60%: price = 40 ÷ (1 − 0.60) = 40 ÷ 0.40 = $100.

Cost $18, target margin 30%: price = 18 ÷ 0.70 ≈ $25.71 (round to your pricing rules, e.g. $25.99).

If you prefer thinking in markup: price = cost × (1 + markup). Cost $40 with 150% markup → 40 × 2.5 = $100 — same result as 60% margin.

Pricing checklist

1. Confirm fully loaded unit cost (materials, inbound freight, packaging, expected spoilage).
2. Pick margin or markup consistently with how finance reports.
3. Compute list price; then model discounts and coupons that reduce realized price.
4. Check competitors and willingness to pay — formula gives a floor/target, not automatic demand.
5. Revisit when cost changes 5%+; a fixed dollar price with rising cost silently erodes margin.

After discounts, recompute margin on the actual cash price, not the list price. Sales tax is usually collected on top of price and is not your margin — see the sales tax calculator for tax-on-price math separate from profit.

Net profit margin = net income ÷ revenue × 100. Net income is after operating expenses, interest, and taxes (and other P&L lines), not only after COGS.

A product can show a 55% gross margin and a 5% net margin if overhead is heavy. Use gross margin for unit pricing; use net margin for overall business health.

Common mistakes

• Treating markup as margin — multiplying cost by 1.40 for a “40% margin” only yields ~28.6% margin
• Ignoring discounts and returns — margin on list price overstates cash margin
• Leaving fees out of cost — payment processing, marketplace commissions, and freights shrink real margin
• Averaging margin % across SKUs without weights — a low-margin high-volume item dominates dollars
• Confusing contribution margin with gross margin — definitions differ by which costs you treat as variable

This guide is educational business math, not accounting, tax, or legal advice. Use your books and a professional for formal financial statements.

For personal cash-flow context (what you keep from pay, not product margin), see the salary and take-home guide. For saving the profits you do keep, the savings calculator guide covers growth math on deposits.