eCommerce Profit Margins: What Affects Them and How to Improve Yours

A healthy eCommerce profit margin is typically 15–25% net and 60–70% gross, according to TrueProfit’s benchmarks for online stores. Many UK retailers earn less, depending on category, returns and advertising costs.  (change suggested by Claude)

To keep more of your money, you need to first understand where it is going. A slight change in any one of the following can affect your margin by many percentage points: product costs, delivery, customer acquisition, platform and payment processing fees, and refunds all take a portion of each order. It’s simple to understand why a busy business can still struggle to earn a solid profit when you take into account the UK’s high return rates in sectors like fashion and rising courier rates. 

Average order value and pricing strategy are equally important. Depending on how they price, bundle, and market the same product, two stores selling it can make significantly different profits. 

In this blog, you will obtain insights into the factors that influence the profit margins in eCommerce, the ways the gross and the net profit margins can be calculated for your eCommerce business, and practical solutions for improving profit margin.

eCommerce Profit Margins Explained 

eCommerce profit margin is the percentage of revenue that is left after costs are deducted. The formula to calculate profit margin is (revenue − costs) ÷ revenue × 100. The margin you are looking at depends on which costs you subtract.

There are 3 types of profit margin:

• Gross profit margin: Formula: (Revenue – COGS) / Revenue × 100). It shows how well your pricing and supplier costs are working.

• Operating profit margin: Formula: (Gross profit − operating expenses) ÷ revenue × 100.  Use this formula to calculate operating profit margin which includes delivery, advertising, platform and payment fees, software, wages. It shows how efficiently the business runs.

• Net profit margin: Formula: (Total Revenue – All Costs) / Total Revenue × 100). This is what the business actually keeps.

A fourth measure, contribution margin, is especially useful for online sellers. It is gross profit minus the variable costs of each order (delivery, packaging, fees, advertising and returns), before fixed overheads. It shows what each order really earns.

Example calculation: 

A store sells £100,000 of products (excluding VAT), with £45,000 COGS, £35,000 operating costs, and £4,000 interest and tax. 

Margin	Calculation	Result
Gross	(£100,000 − £45,000) ÷ £100,000	55%
Operating	(£100,000 − £45,000 − £35,000) ÷ £100,000	20%
Net	(£100,000 − £45,000 − £35,000 − £4,000) ÷ £100,000	16%

What Is a Good eCommerce Profit Margin in the UK?

There is no single official UK benchmark for eCommerce businesses, because published figures measure margins in different ways. The most useful approach is to compare your own numbers with a target range, then with what comparable UK retailers actually report.

Target ranges for online stores 

Margin	Healthy Target	Notes
Gross	60 to 70%	Reflects pricing and supplier costs
Net	15 to 25%	After all costs, including delivery, advertising and returns

These ranges are taken  from TrueProfit’s research data on a global, Shopify heavy merchant base, so they are targets to aim for, not UK averages. Other published sources put the typical net margin nearer 10%, so treat 15% to 25% as a strong result rather than the norm. Category makes a big difference: low-margin sectors such as electronics and groceries usually sit below this range, while beauty and supplements often sit above it. 

How UK retailers compare

[Insert verified online or store operating margins from the latest annual reports of two or three UK retailers, with the source linked. For example, a clothing and home retailer that discloses online margin separately, and an online grocer.]

The Cost Drivers That Shape Your Margin  

Five cost pressures stand out for UK eCommerce businesses in 2026: inflation, labour, energy, supply chain and logistics, and financing and tax. Each one hits your margin at a different point in your accounts, so protecting profitability means understanding how they interact. A direct comparison of these drivers highlights their current impact on UK business margins:

Cost Driver	What it includes	Current UK Context  & Trends
Inflation	COGS and operating costs	UK CPI inflation was 3.1% in August 2026 (ONS), up from 2.9% in July, so supplier, packaging and courier prices keep drifting up. The Bank of England expects CPI to rise to around 3.75% in the final quarter of 2026.
Labour Costs	Overheads and fulfilment costs	The National Living Wage rose to £12.71 an hour in April 2026. Employer National Insurance is 15% above £96 a week (£417 a month), and the Employment Allowance cuts an eligible bill by up to £10,500. Some companies cannot claim it, for example where the sole director is the only employee.
Energy & Utilities	Overhead / fixed costs	The Bank of England said in September that Brent crude and UK wholesale gas prices had risen 36% and 78% since its July report. This can feed through to warehousing, packaging and courier fuel surcharges.
Supply Chain & Logistics	Inbound freight and duties (COGS) and outbound delivery (operating costs)	Influenced by border controls since Brexit, regulatory compliance, and global shipping disruptions.
Financing & Tax	Below operating profit (interest, then tax)	Bank Rate was held at 3.75% in September 2026, though three of nine committee members voted for a rise. Corporation Tax (limited companies) is 19% on profits up to £50,000 and 25% above £250,000, with marginal relief in between.

A UK Worked Example: From Sale Price to Net Margin 

A product sells for £60 including 20% VAT. The VAT (£10) belongs to HMRC, so your net revenue is £50. All margins are calculated on that figure. 

Illustrative data: 

Line	Per order
Net revenue	£ 50.00
Cost of goods sold	−£20.00
Gross profit (60% margin)	£30.00
Delivery, fees, advertising and returns	−£18.70
Overheads	−£5.00
Profit before tax (12.6% margin)	£6.30

When all costs are taken into account, a 60% gross margin becomes a 12.6% margin before tax. Income tax or corporation tax would then be deducted from your profit.

eCommerce Profit Margin Mistakes That Hide Real Losses

Most eCommerce profit margin errors happen because costs are left out or the margin is measured against the wrong number. Here are the most common mistakes:

Mistake	Why it flatters your margin	The fix
Counting VAT as revenue	Inflates revenue by 20%, so every margin looks higher. A £20 cost on a £60 VAT inclusive price shows 66.7% gross margin, not the real 60%.	Calculate on net revenue, excluding VAT.
Mixing up markup and margin	A 100% markup is only a 50% margin. Pricing by “doubling the cost” leaves less profit than you expect.	Set prices from your target margin: price = cost ÷ (1 − target margin).
Tracking only gross margin	Ignores delivery, advertising, fees, returns and overheads, so a healthy product can still lose money.	Track contribution and net margin as well.
Ignoring returns	Refunded sales still carry delivery, return postage and sometimes unsellable stock.	Build a return provision into every order.
Leaving out advertising	Ad spend is often the biggest variable cost, but it’s frequently tracked separately from product profit.	Include customer acquisition cost in contribution margin.
Using one blended store margin	Strong products hide weak ones, and loss-making items go unnoticed.	Check margin by product or category.

Costs that often go missing

• Payment processing and marketplace fees
• Packaging, inserts and labels
• Storage and warehousing
• Dead or unsold stock and write-offs
• Software subscriptions and accountancy
• Chargebacks and customer service time
• Packaging EPR fees, if your business is in scope
• Import VAT and customs duty on goods bought from overseas

How to Improve Your eCommerce Profit Margins 

UK eCommerce businesses can improve their profit margins by focusing on seven areas: pricing, product costs, delivery, advertising efficiency, returns, average order value, and fees and overheads.

Seven ways to improve your margin: 

1. Review your pricing: A small price rise goes straight to profit if demand holds, because your costs stay the same. Set prices from a target margin rather than a markup, and aim for a margin that is healthy for your category. 

2. Negotiate product costs: Compare supplier quotes, ask for volume discounts and combine orders to reduce inbound freight. Drop or reprice products whose margins are too thin.

3. Reduce delivery and packaging costs: Compare couriers, negotiate rates as your volume grows and use right sized packaging so you are not paying to ship air. Set a free delivery threshold that covers its own cost.

4. Focus on quality ads: Spend more on your most profitable products, stop unprofitable campaigns, and put more effort into email and repeat customers, who cost less to acquire than new ones.

5. Reduce returns: Improve product descriptions, size guides and photos, and review items with high return rates. In fashion, where returns are typically highest, this often has the biggest impact. 

6. Raise average order value (AOV): Encourage customers to spend more per order with bundles, add ons, bulk discounts and free delivery above a set amount. Set the free delivery threshold slightly above your current average order value. This spreads delivery, marketing and other costs across a larger sale. 

7. Review fees and overheads: Review your platform plan, software subscriptions and payment processor charges, and cancel tools you no longer use. Compare the fee structure on each channel, such as your own store against marketplaces like Amazon, eBay and Etsy, because the same product can carry very different margins by channel.

How to Track Your eCommerce Profit Margin Monthly

It is too late to make any corrections when margin is tracked once a year during tax season. A regular check reveals which expenses are rising, which products quietly lose money and whether growth is genuinely profitable. Calculate your margins the same way each month so the figures compare fairly.

Track both gross and net margin. Gross margin shows whether pricing and supplier costs are working, and net margin shows whether the business is profitable overall. A business can have a high gross margin and still make little or no profit.

Step 1: Calculate net revenue 

Take your monthly sales total and exclude VAT, refunds, and cancelled orders. Since VAT is owed to HMRC, adding it improves the appearance of each margin. If you sell through many channels, like a marketplace and your own website, keep separate records for each one. 

Step 2: Work out cost of goods sold (COGS) 

COGS, not the stock you purchased, is the cost of the goods you actually sold during the month. Inbound freight, import duties, purchase or manufacture costs, and any product-level packaging are all included. Deducting a significant stock order in the month you paid for it is a common mistake that causes that month to appear unprofitable and the following month to appear exceptionally profitable. 

Step 3: Calculate gross margin 

Use this formula:

Gross margin = (net revenue − COGS) ÷ net revenue × 100

If your net revenue is £20,000 and COGS is £8,000, your gross profit is £12,000 and your gross margin is 60%.

Step 4: Deduct your variable costs 

The quantity of orders has an impact on variable costs. Keep track of delivery, outbound packaging, platform and payment processing fees, advertising, and return expenses like refunds, return shipping, and unsold inventory. Your contribution profit, which displays what your orders make before fixed costs, is obtained by deducting these from gross profit. 

Step 5: Deduct overheads to find net margin 

Regardless of the volume of sales, overhead expenses include salaries, software subscriptions, insurance, accounting, storage, and business rent. To find your net profit before taxes, deduct these from the contribution profit. If you are a sole trader, also check whether Making Tax Digital for Income Tax applies to you.

Step 6: Compare month to month 

The figures only become useful when you compare them with earlier months. Look at what changed and why: 

• Gross margin declines: look for increases in supplier prices, significant discounts, or a move toward lower-margin goods.

• Gross margin holds but net margin falls:  costs below the gross profit line, usually advertising, delivery, returns or overheads, are growing faster than sales. 

• Profit doesn’t increase as revenue does: you may be buying growth through ads or discounts that your margins can’t support. 

How E2E Accounting Helps eCommerce Sellers Protect Their Margins 

For UK eCommerce sellers, profit rarely disappears in one big hit. It leaks away through fees, refunds, postage, currency conversion and VAT errors. E2E Accounting connects every stage of your business, from the customer’s click to your accounts and HMRC filings, so you can spot and stop those leaks.

1. Check your true margin, not just revenue: eCommerce platforms such as Amazon, eBay, Shopify and Etsy pay out net of fees, refunds and adjustments. Our eCommerce accountant divides each payout into gross sales, commission, fulfilment fees, ad spend, returns and reserves, so you can see profit by channel, product or SKU. 

2. Spot unprofitable bestsellers: Products that appear profitable based only on sales volume may end up losing money after all costs are taken into account. Product-level margin data reveals which lines require repricing or elimination and which merit more investment. 

3. Catch hidden costs early: Reconciliation identifies unmatched refunds and chargebacks, lost or damaged product that was never compensated, duplicate or inaccurate marketplace and payment processor fees, and currency conversion expenses for international transactions. 

4. Keep VAT accurate: At the transaction level, accurate rates, place-of-supply regulations, and marketplace-collected VAT are applied. This lets you monitor your status in relation to the £90,000 registration threshold, lowers the possibility of overpaying or underpaying, and promotes Making Tax Digital for VAT compliance. 

5. Know real-time numbers: With sales, fees, stock and tax data in one set of up-to-date accounts, you can judge whether a promotion or new channel paid off, forecast cash flow, plan stock purchases and set money aside for tax without waiting for a quarterly catch-up. 

6. Scale with confidence: If eCommerce profit margins are shrinking with every extra order then your business is not growing. Our expert accountants will help you to identify the leaks, suggest methods to fix and you can grow with trust. 

Ready to see where your profit is really going? Speak to our eCommerce accounting team today for a free, no-obligation review of your current setup. 

FAQs: Frequently Asked Questions

Conclusion 

Protecting your eCommerce profit margin starts by knowing where your money is going and taking actions on it consistently. A healthy gross margin means little if delivery, advertising, returns, fees and overheads quietly erode what is left, which is why it pays to track gross, contribution and net margin side by side, using net revenue that excludes VAT.

The practical steps are straightforward. Set prices from a target margin rather than a markup, negotiate product and delivery costs, put your advertising budget behind your most profitable products, reduce returns, and raise your average order value. Then review the numbers every month, not once a year at tax time, so you can see which costs are creeping up and which products are losing money before the damage builds.