Keystone Markup
Keystone markup sets the retail price at double the cost, a 50 per cent initial markup on retail. How it relates to IMU and where it holds by vertical.
Keystone markup is the pricing convention of setting an item's retail price at double the cost paid for it: a 100 per cent markup on cost, which is the same price as a 50 per cent initial markup expressed on retail. It names a multiplier, not a margin target, and the cost it doubles is whichever cost the pricer chooses — an account's wholesale cost, a brand's first cost, or its landed cost. That choice is where the convention's errors start.
How keystone relates to initial markup
IMU on retail is (retail − cost) ÷ retail. At keystone the markup is exactly half the retail price, so IMU is 50 per cent and the cost complement — the cost-to-ticket ratio — is 0.50. Quoted on cost, the same price reads as a 100 per cent markup, and a plan that mixes the two converts a retail open-to-buy to cost with the wrong complement.
The figures below are illustrative, chosen because they divide cleanly; they are not benchmarks and are not drawn from any brand. An item has a first cost of $30 and $6 of freight and duty, a landed cost of $36. Keystoned on first cost it retails at $60, an IMU on landed cost of (60 − 36) ÷ 60 = 40 per cent. Keystoned on landed cost it retails at $72 and holds 50 per cent. The word keystone survives both prices; the margin does not.
Where the convention holds, and where it does not
Keystone describes the margin when two conditions are true: the reseller chooses its own retail price, and the cost it doubles is one stable number. An apparel or accessories account working from a line sheet that quotes a wholesale price and a suggested retail at double it meets both; the brand's own step from landed cost to wholesale is a separate multiple that keystone does not describe. When either condition fails, keystone stops describing the margin.
- Cost is not one number. Freight and duty on home and furniture move between order and receipt, so keystone on first cost overstates IMU on landed cost. Metal cost in jewelry and watches moves independently of the season, so a price set at double the day's cost either reprices when metal moves or gives up margin.
- The reseller does not set the price freely. Under a MAP policy in outdoor, sporting goods or juvenile hard goods, the advertised floor caps how far the account can discount, so the markdown it can take, and the markup it keeps on promoted goods, is bounded by the gap between MAP and its cost. Where a beauty brand sets one retail price across every door, or a toy is sold to a retailer's price point, the margin is the result of a negotiation, not a multiplier applied to cost.
- The markup is not maintained. A footwear model keystoned on a complete size run earns its IMU only on pairs sold at full price; broken runs clear below it, and maintained markup is what the plan keeps.
Common mistakes
- Treating keystone as a margin target. A 50 per cent IMU is the starting point before markdowns, shrink and allowances, not the margin the plan keeps.
- Doubling the wrong cost. Keystone on first cost, where freight and duty are material, prices below the margin the plan assumes.
- One multiplier across categories. A brand selling several verticals through one price architecture puts different cost structures under one rule, and the categories with moving costs absorb the difference.
In RetailNorthstar: IMU is planned by category in the same model as open-to-buy and the buy plan, so a cost change on a style shows its effect on IMU during buy planning rather than after the buy is placed. See open-to-buy by vertical for how the cost complement feeds the balance.