Auto Parts Markup to Margin Calculator 2025/26

Markup is the percentage added to the cost price to arrive at the selling price. Margin (gross margin) is the profit expressed as a percentage of the selling price. For example: cost £40, selling price £60 = markup of 50% (profit ÷ cost) but margin of 33% (profit ÷ selling price). Many garages mistakenly price parts using a target markup figure when they should be targeting a margin figure — this leads to systematic underpricing. Always target and quote margin, not markup, when setting pricing policy.

Target margins vary by part type: consumables and filters 40–60%, brake pads and discs 35–50%, mechanical/engine parts 25–40%, tyres 20–35%, specialist/OEM parts 15–30%. The lower end reflects heavily competitive categories where customers can easily price-check online. Garages that invest in a trade account with a national parts distributor (Euro Car Parts, GSF, Andrew Page) typically secure 30–50% off retail price, giving good margin opportunity at competitive retail prices.

OEM (original equipment manufacturer) parts are made by the vehicle manufacturer or their approved supplier, and are required to maintain a new vehicle warranty under Block Exemption Regulations. Pattern parts are aftermarket equivalents, often cheaper in supply cost. Garages servicing vehicles out of warranty frequently use quality pattern parts (e.g. Bosch, Valeo, Febi Bilstein) at lower supply cost, enabling better margin at competitive retail prices. For safety-critical components (brake callipers, suspension joints, airbag parts), many garages apply an OEM-only policy.