Markup in accounting is the amount added to the cost of a product or service to arrive at its selling price, expressed as a percentage of that cost. The formula is straightforward: markup percentage equals the selling price minus the cost, divided by the cost. Buy a widget for $40, sell it for $60, and the $20 difference over the $40 cost gives you a 50% markup. The formula is simple. The mistakes people make with it are not, and they can quietly drain profitability for years.
How to Calculate Markup
The formula always uses cost as the denominator:
Markup Percentage = (Selling Price − Cost) / Cost
That denominator is what separates markup from gross margin. Mixing the two up is the single most common pricing error in small business.
A worked example. You purchase inventory for $40.00 and price it at $60.00. The dollar markup is $20.00. Divide $20.00 by the $40.00 cost and you get 0.50, or 50%.
The formula works in reverse too. If you’ve decided that a 75% markup covers your operating expenses and leaves acceptable profit, price any new product by multiplying its cost by 0.75 and adding the result. A product that costs $120.00 gets a $90.00 markup, landing at a $210.00 selling price.
The mistake to watch for: dividing the markup dollars by the selling price instead of the cost. Using the same numbers, dividing $20 by $60 gives you 33.3%. That’s the gross margin, not the markup. An owner who thinks the markup is 33.3% when it’s really 50% will underprice every item in the catalog, and the error compounds across every SKU.
Markup vs. Gross Margin
Both metrics use the same dollar amount of profit. The difference is what you divide by.
- Markup: profit dollars divided by cost. A $20 profit on a $40 cost is a 50% markup.
- Gross margin: profit dollars divided by selling price. That same $20 profit on a $60 selling price is a 33.33% margin.
A 50% markup and a 50% margin are not the same thing. A 50% margin is far more aggressive. It means half the selling price is profit, which requires a 100% markup (doubling your cost). A business owner told to “target a 40% margin” who applies a 40% markup will underprice every item and wonder why the books don’t balance.
Converting Between the Two
Two formulas let you move between markup and margin without recalculating from scratch.
To convert a markup percentage (M) into gross margin (G): G = M / (1 + M). A 50% markup converts to 0.50 / 1.50, or 33.33% margin.
To convert a target margin (G) into the required markup (M): M = G / (1 − G). Targeting a 40% margin means 0.40 / 0.60, which requires a 66.67% markup. That’s a significant gap from the 40% markup someone might mistakenly apply.
A few pairings worth memorizing: a 25% markup yields a 20% margin. A 50% markup yields a 33.3% margin. A 100% markup (doubling cost) yields a 50% margin. Markup percentages are always higher than the corresponding margin. When someone quotes a number and it isn’t clear which they mean, ask.
Setting a Markup That Covers Your Costs
Picking a markup by gut feel or by copying a competitor is how businesses end up technically profitable on paper but cash-strapped in practice. Your markup needs to clear two bars: it must cover all operating expenses not captured in your cost of goods, and it must leave enough left over for actual profit.
The connection between markup and break-even is direct. Break-even units equal fixed costs divided by the difference between selling price per unit and variable cost per unit.1U.S. Small Business Administration. Break-Even Point That difference is contribution margin per unit. If fixed costs are $10,000 per month, variable cost per unit is $40, and you price at $60, each sale contributes $20 toward overhead. You need 500 units per month just to break even.
Markup becomes a strategic decision at that point, not a formula exercise. Raising the markup from 50% to 75% on that $40 product moves the price to $70, lifts contribution margin to $30, and drops the break-even point to 334 units. The higher price may reduce demand enough to offset the gain. The right markup sits at the intersection of what the market will bear and what your cost structure requires.
The cost figure you plug into the formula matters. For retailers, it’s the wholesale purchase price. For manufacturers, it’s the total of direct materials, direct labor, and manufacturing overhead. Using only raw material cost as the denominator is a common error that produces a markup percentage far too low to sustain the business.
How Discounts Erode Markup
A carefully calculated markup can evaporate the moment you run a promotion, and the math is less intuitive than most owners expect.
Take a product with a $40 cost and a 50% markup, priced at $60. Gross profit is $20 per unit. Run a 20% off sale and the customer pays $48. Gross profit drops to $8 per unit. A 20% discount produced a 60% cut in profit. The damage is disproportionate because the discount comes off the selling price, not the markup. Cost stays fixed at $40 regardless of what the customer pays.
Seasonal markdowns hit harder. If that $60 item gets marked to $45 to clear inventory, you’re making $5 per unit on a product you expected to net $20. You’d need to sell four clearance units to generate the same gross profit as one full-price sale. Businesses that routinely mark down 30 to 40% of their inventory should build those expected losses into the initial markup. A planned 50% markup with a 30% eventual markdown rate on a quarter of inventory is effectively a much lower blended markup.
Where Markup Appears in Formal Accounting
Beyond day-to-day pricing, markup shows up in specific places that affect financial statements, tax compliance, and contract terms.
The Retail Inventory Method
Retailers with thousands of SKUs often can’t count every item to determine inventory value at period end. The retail inventory method, recognized under GAAP (ASC 330), works backward from known retail prices. It uses the ratio of cost to retail value (the “cost complement”) to estimate cost of goods sold and the value of remaining inventory. If a store holds $500,000 in inventory at retail prices and the historical cost-to-retail ratio is 60%, the estimated inventory cost for the balance sheet is $300,000. The markup percentage is baked into that ratio, which is why consistent markup records matter for retailers using the method.
Cost-Plus Contracts
In government contracting and large B2B projects, cost-plus contracts set the price as verified costs plus an agreed fee or markup. A contractor might agree to deliver at cost plus 10%, so every documented dollar of expense carries a $0.10 fee on top.
Federal contracts face statutory caps. Under the Federal Acquisition Regulation, cost-plus-fixed-fee contracts for research, development, or experimental work cannot exceed a 15% fee on estimated costs. Most other cost-plus-fixed-fee contracts are capped at 10%.2Acquisition.GOV. FAR 15.404-4 Profit Architect-engineer services for public works are capped at 6% of estimated construction costs. The caps exist because cost-plus creates a perverse incentive: higher costs mean higher fees. Contracts typically include audit rights so the buyer can examine the contractor’s books and verify reported costs.
Transfer Pricing on Related-Party Sales
When a company sells goods or services to a related entity (a subsidiary, a parent, or a commonly owned affiliate), the markup on that transaction is subject to IRS scrutiny. Section 482 of the Internal Revenue Code lets the IRS reallocate income between related organizations if the pricing doesn’t reflect what unrelated parties would have agreed to in the same circumstances.3Office of the Law Revision Counsel. 26 USC 482
The standard is “arm’s length”: the price between related companies must be consistent with what independent parties would charge each other. There is no single approved markup percentage. The IRS looks at comparable transactions between unrelated companies to determine whether the controlled transaction’s markup falls within an acceptable range.4Internal Revenue Service. Comparison of the Arm’s Length Standard with Other Valuation Approaches – Inbound
One common method is the “cost of services plus” approach. The IRS examines the gross services profit markup a company earns on comparable transactions with unrelated customers and compares it to the markup charged to the related entity.5eCFR. 26 CFR 1.482-9 – Methods to Determine Taxable Income A company that charges unrelated clients a 10% markup on IT services but only 2% to a foreign subsidiary can have income reallocated to reflect the arm’s length rate. The consequences include additional tax, penalties, and interest. Any business with related-party transactions should treat markup documentation as a compliance requirement, not just a pricing preference.
Common Markup Mistakes
Most markup errors fall into a handful of predictable patterns. Recognizing them in advance is cheaper than correcting them after they’ve eaten into margins for a quarter or two.
- Confusing markup with margin. Applying a 40% markup when the goal was a 40% margin leaves money on the table on every sale. A 40% margin requires a 66.67% markup.
- Using incomplete cost figures. Calculating markup on raw materials alone while ignoring direct labor and manufacturing overhead understates the true cost basis and produces a selling price that doesn’t cover total production expense.
- Ignoring planned markdowns. Setting an initial markup without accounting for the share of inventory that eventually sells at a discount produces a blended markup too low to hit profit targets.
- Applying a flat markup across all products. A single percentage rarely works for an entire product line. High-volume, price-sensitive items may need lower markups to stay competitive, while specialty items can support higher ones. One number either overprices the commodity items or underprices the specialty ones.
- Forgetting to revisit the number. Cost inputs change. Supplier prices shift, shipping fluctuates, and overhead grows as the business scales. A markup set two years ago may no longer cover current expenses. Quarterly reviews of markup targets against actual margins catch drift before it becomes a problem.