How to price products to achieve healthy profit margins

Pricing products correctly is essential for UK online sellers to cover costs, account for VAT, and generate sustainable profit. By understanding how to calculate gross and net margins while factoring in all overheads, you can set prices that keep your business viable without guesswork.

This guide walks through the practical steps for determining your true costs, applying VAT considerations, and arriving at a selling price that delivers healthy margins. The process applies whether you sell on your own website, Amazon, Etsy or Shopify.

Why accurate product pricing matters for UK startups

Getting your pricing right directly affects cash flow and long-term survival. Under-pricing means you may cover direct costs but fail to contribute enough to overheads or leave any profit. Over-pricing can reduce sales volume and make your products uncompetitive.

UK online sellers must also consider how VAT applies to sales and purchases. Prices displayed to consumers must usually include VAT, yet your internal calculations work with figures excluding VAT. A clear method helps you track what is left after all expenses.

Calculating your cost of goods sold (COGS)

Begin by determining the true cost of each product. This includes the purchase price from your supplier, shipping to your storage location, import duties if applicable, and any packaging materials that form part of the finished item.

Record the landed cost per unit in pounds.
Include any platform fulfilment fees if using services like FBA.
Factor in return rates by adding an allowance for the average cost of returned items.

Keep records of every element so you can update calculations when supplier prices change. Review these costs at least every quarter.

Understanding gross margin and how to calculate it

Gross margin shows the percentage of revenue remaining after subtracting the direct cost of goods sold. The basic formula is:

Gross margin = (Selling price – Cost of goods sold) ÷ Selling price × 100

For example, if a product costs £12 to land and you sell it for £30, the gross profit per unit is £18. The gross margin is therefore (£18 ÷ £30) × 100 = 60%. This figure indicates how much money is available to cover operating expenses and generate profit before VAT is considered separately.

Most UK e-commerce businesses aim for a gross margin that leaves sufficient room once all other costs are deducted. Track this metric per product line rather than as a single average.

Incorporating VAT into your pricing calculations

VAT treatment varies depending on your turnover and the countries you sell to. UK sellers must understand when VAT should be added to the selling price shown to customers and how to reclaim VAT paid on business purchases.

When calculating margins, work with figures excluding VAT first. Add the appropriate rate of VAT to the final selling price for display on your website or marketplace. Remember that VAT rates and registration thresholds can change; always check the latest guidance on GOV.UK or with HMRC.

For sales to other EU countries after Brexit, additional rules around distance selling and VAT collection may apply. Factor the cost of any additional compliance or third-party services into your overhead calculations rather than the per-unit COGS.

Factoring in overheads to reach net margin

Net margin reveals the true profitability after all business expenses. To calculate it, subtract operating costs from your gross profit. Typical overheads for UK online sellers include:

Website hosting, platform fees and payment processing charges
Storage, utilities and insurance
Marketing, advertising and software subscriptions
Accountancy, bookkeeping and banking fees
Office supplies, travel and any salaries or freelance costs

Divide your total monthly overheads by the number of products you expect to sell in that period to arrive at an overhead cost per unit. Add this to your cost of goods sold to give a fully absorbed cost.

Net margin = (Selling price – Fully absorbed cost) ÷ Selling price × 100. Using the earlier example, if overheads add another £9 per unit, the fully absorbed cost becomes £21. Net margin on a £30 sale would be (£9 ÷ £30) × 100 = 30%.

Practical steps to set and review your prices

List every cost element for each product, separating those that vary per unit from fixed monthly overheads.
Decide on your target net margin based on the cash your business needs to remain sustainable and grow.
Calculate the minimum selling price that achieves this target after VAT is added for display.
Compare this price against competitor pricing and perceived customer value.
Adjust either your costs (by negotiating with suppliers) or your target margin if the resulting price appears uncompetitive.
Document your pricing rationale and review it whenever major costs change or at least twice a year.

Use a simple spreadsheet to model different pricing scenarios. Include columns for cost of goods, overhead allocation, VAT, selling price, gross margin and net margin. Update the sheet regularly with actual sales data.

Common pitfalls and how to avoid them

Many UK e-commerce sellers focus only on gross margin and forget to allocate enough for overheads, leading to apparent profitability that disappears when all bills are paid. Others absorb increasing costs without raising prices, gradually eroding margins.

Avoid setting prices based solely on a fixed markup percentage. Different products often have different overhead demands and competitive positions. Treat pricing as an ongoing process rather than a one-time decision.

Keep clear records of all calculations for tax and bookkeeping purposes. HMRC expects you to be able to explain how you arrived at your costs and profits during any review. Check current requirements on GOV.UK and with your accountant.

Frequently asked questions

What is the difference between gross margin and net margin?

Gross margin is the percentage left after subtracting only the direct cost of goods sold from the selling price. Net margin subtracts all operating overheads as well, showing the final profit percentage. For UK online sellers it is important to calculate both so you understand how much money remains to cover fixed costs and deliver actual profit.

Should I include VAT when calculating my product margins?

Work with figures excluding VAT when calculating margins. Determine your cost of goods and overheads net of VAT you can reclaim, then add the correct VAT rate to the final selling price shown to customers. This keeps your margin calculations accurate and separate from tax collected on behalf of HMRC.

How often should I review my product pricing?

Review pricing whenever supplier costs change significantly or at least every six months. Many UK e-commerce businesses update their calculations quarterly alongside their bookkeeping. Regular reviews help you respond to rising overheads or shifts in competitive pricing without waiting until cash flow problems appear.

How do I allocate overheads to individual products?

Calculate your total monthly overhead costs and divide by the number of units you realistically expect to sell across all products in that month. This gives an average overhead per unit. More advanced approaches allocate costs based on the amount of storage space, advertising spend or processing time each product requires.

Can I use a fixed markup percentage for all my products?

A single markup percentage rarely works well because products have different shipping costs, return rates, storage needs and competitive pressures. Calculating margins individually for each product line usually produces more accurate and sustainable pricing for UK online sellers.