How to Price a Product: The Formula Every Seller Needs

The costs most sellers forget

Obvious costs like product cost and shipping are easy to include. The costs that silently destroy margins are the ones expressed as percentages of the sale price:

• Payment processing fees: Stripe and PayPal charge around 2.9% per transaction. Etsy charges 6.5%. Amazon charges 8-15% referral fees depending on the category. These come off every sale before you see the money.
• Returns and refunds: even a 2-3% return rate means you occasionally ship a product, pay for return shipping, and receive nothing. This cost must be spread across all sales.
• Ad spend per unit: if you run paid ads, divide your monthly ad spend by the number of units those ads generate. This is often 3-8 per unit for e-commerce and climbs fast if your conversion rate drops.
• Packaging: boxes, tissue paper, branded inserts, and tape add up faster than expected, especially for premium products.

The pricing formula

Fixed costs are the amounts you pay regardless of the sale price: product cost, packaging, shipping to customer, and ad spend per unit. Variable costs (fees, returns) are deducted as percentages of the price because they scale with revenue. For example: product cost 8.00, packaging 1.50, shipping 4.50, ad spend 5.00. Fixed costs total: 19.00. Payment fee 2.9%, returns 3%, target margin 50%. Recommended price = 19.00 / (1 - 0.029 - 0.03 - 0.50) = 19.00 / 0.441 = 43.08.

What gross margin should you target?

Gross margin is the percentage of the selling price that remains after all direct costs. Different business models need different minimum margins to be viable after overheads:

• Direct-to-consumer e-commerce: 50-70% gross margin is needed to cover ad spend, fulfilment overhead, and returns while leaving room for operating costs.
• Wholesale to retailers: retailers typically expect to double their cost (50% retail margin), so you need to price at roughly half the retail price while keeping your own margin above 30%.
• Marketplace sellers (Amazon, Etsy): 40-60% gross margin before marketplace fees, since the fees themselves consume 10-20% of the sale price.
• Handmade and craft products: 60-70% gross margin is standard to compensate for the high labour input that does not show up in material costs.

Pricing for different sales channels

The same product often needs different prices on different channels because the fee structures differ. A product priced to deliver 50% margin on your own Shopify store (2.9% fees) will deliver only 35-40% margin on Amazon after referral fees of 15%. If you sell across multiple channels, either set a higher base price that works everywhere, or list at different prices per channel. Never use your own-website price as the Amazon price without recalculating.

How discounts erode your margin

A 10% discount on a product priced for 50% margin does not reduce your margin by 10 percentage points. It reduces it by far more, because your fixed costs stay constant while your revenue drops. On the 43.08 example above: a 10% discount to 38.77 drops the margin from 50% to 37.7% - a 12.3 percentage point fall from a 10% price cut. At 20% off (34.46) the margin falls to 23.5%. Use the discount impact table in the Product Pricing Calculator to see these numbers for your specific product before running a promotion.

Common pricing mistakes

• Confusing margin with markup - a 100% markup gives 50% margin, not 100% margin. The Product Pricing Calculator uses margin throughout.
• Using the same price for all channels - Amazon fees alone can add 15% to your cost of sale compared to direct.
• Setting ad spend based on optimistic conversion rates - calculate ad spend per unit sold at your actual conversion rate, not your target.
• Not building in a buffer for cost increases - supplier prices, shipping rates, and platform fees all change. Price for today's costs plus 5-10% headroom.
• Underpricing to compete - if your price is lower than the formula recommends, you are subsidising customers from your own pocket. Compete on value, not on price.

Use the Product Pricing Calculator

The Product Pricing Calculator on this site applies this formula automatically. Enter your product cost, packaging, shipping, ad spend, payment fee percentage, returns allowance, and target margin - and it shows your recommended selling price, break-even price, profit per unit, and a discount impact table. It runs in your browser and stores nothing.