Shopify makes it relatively easy for UK businesses to start selling online, but understanding what you actually pay per order can be less obvious. Each sale may include a payment processing fee, a fixed card charge, possible third-party transaction fees, VAT considerations, app costs, shipping charges, and sometimes currency conversion costs. If you want to protect your margins, you need to calculate your true Shopify fee per sale, not just look at the monthly subscription price.
TLDR: To calculate Shopify fees per sale for a UK online store, add the payment processing fee, fixed transaction charge, any third-party payment fee, shipping or app-related per-order costs, and VAT impacts where relevant. The exact amount depends on your Shopify plan, payment provider, order value, customer location, and whether you use Shopify Payments. For a simple UK card payment, the formula is usually: percentage card fee + fixed card fee + any extra transaction fees. Always check your current Shopify admin pricing because rates can change.
Why Shopify fees matter for UK sellers
For many UK online stores, Shopify fees are not just a small administrative cost. They directly affect profit margins, pricing strategy, and cash flow. A product that looks profitable at first glance may become far less attractive once you account for card processing, postage, VAT, packaging, app subscriptions, returns, and advertising costs.
Imagine you sell a candle for £25. If you only consider the product cost, you might feel comfortable. But once you pay payment processing fees, shipping materials, Royal Mail postage, VAT if registered, and potentially a transaction fee for using an external payment provider, your real profit can shrink quickly. That is why every Shopify merchant should know how to calculate fees per sale, not just per month.
The main Shopify fees you need to understand
Shopify costs are usually made up of several layers. Some apply to every sale, while others depend on your setup. The most common fee categories are:
- Monthly Shopify subscription: The flat fee you pay for your chosen Shopify plan.
- Payment processing fees: The percentage and fixed fee charged when a customer pays by card or another supported method.
- Third-party transaction fees: Extra Shopify fees that may apply if you do not use Shopify Payments.
- Currency conversion fees: Possible charges when selling internationally or receiving payments in another currency.
- App fees: Costs for apps used for reviews, subscriptions, upsells, shipping, analytics, or email marketing.
- Shipping and fulfilment costs: Not Shopify fees in the strict sense, but essential when calculating profit per sale.
- VAT: Important for UK sellers who are VAT registered or selling to certain international customers.
Shopify Payments vs third-party payment gateways
One of the biggest factors in calculating your Shopify fee per sale is whether you use Shopify Payments. Shopify Payments is Shopify’s built-in payment processor. In the UK, it allows you to accept major cards and other payment methods without needing a separate gateway account.
If you use Shopify Payments, you generally pay the card processing fee for your plan. If you use a third-party gateway, such as another card processor, Shopify may charge an additional transaction fee on top of whatever that provider charges. This can make a noticeable difference, especially for stores with high sales volume.
For example, if your third-party provider charges 1.4% + 20p and Shopify adds an additional transaction fee, your total cost per sale may be higher than expected. That does not always mean third-party gateways are a bad choice. Some businesses need them for specialist payment methods, B2B invoicing, high-risk products, or international requirements. However, you should calculate the full cost before choosing one.
The basic formula for calculating Shopify fees per sale
For a typical UK online sale paid by card, you can use this simple formula:
Shopify fee per sale = percentage payment fee + fixed payment fee + third-party transaction fee + other per-order costs
More specifically:
(Order value × payment processing percentage) + fixed card fee + any Shopify transaction fee + any app or fulfilment costs tied to the order
Let’s say your customer places an order worth £50, including shipping. If your payment processing rate is 2% + 25p, the calculation would look like this:
- Percentage fee: £50 × 2% = £1.00
- Fixed fee: £0.25
- Total payment fee: £1.25
In this simple example, your Shopify-related payment fee for that sale would be £1.25. If another transaction fee applies, add that separately.
Example: calculating fees on a UK Shopify order
Let’s walk through a more complete example. Suppose you run a UK homeware store on Shopify and sell a ceramic mug set for £40. The customer pays £4 for shipping, making the total checkout value £44.
Assume your card processing fee is 2% + 25p.
- Start with total order value: £44.00
- Calculate the percentage fee: £44 × 0.02 = £0.88
- Add the fixed fee: £0.88 + £0.25 = £1.13
- Total payment processing fee: £1.13
If you use Shopify Payments and there are no extra third-party transaction fees, your direct payment fee is £1.13. But to understand profitability, you should also include other order-level costs:
- Product cost: £14.00
- Packaging: £1.20
- Postage: £3.50
- Payment fee: £1.13
- Total order costs: £19.83
Your gross profit before advertising, VAT, returns, and overheads would be:
£44.00 – £19.83 = £24.17
This kind of calculation gives you a much clearer view of whether your pricing is sustainable.
How your Shopify plan affects fees
Shopify typically offers several plans, such as Basic, Shopify, and Advanced. Higher-tier plans usually come with a higher monthly subscription but lower payment processing rates. This means the best plan for your store depends partly on your sales volume.
A beginner store with a small number of monthly orders may prefer a lower monthly fee, even if the card processing rate is slightly higher. A larger store processing thousands of pounds each month may save money by upgrading to a plan with lower per-sale fees.
To compare plans, estimate your monthly sales and apply the rates for each plan:
- Monthly sales: How much revenue you expect to process.
- Average order value: The typical amount customers spend per order.
- Number of transactions: Important because fixed fees are charged per transaction.
- Payment method mix: Card, wallets, PayPal, Klarna, or other options may have different costs.
For example, a store with fewer but higher-value orders may pay less in fixed fees than a store with many small orders. If you sell £5 accessories, the fixed fee matters a lot. If you sell £500 furniture items, the percentage fee has a bigger impact.
Do you calculate fees on the product price or total order value?
Payment processing fees are usually calculated on the total amount paid by the customer, not just the product price. That means the fee may apply to shipping charges, taxes, and any other amount collected at checkout.
For example, if a product costs £30 and the customer pays £5 shipping, the payment processor normally calculates its fee on £35. This is important because sellers sometimes forget that shipping income also attracts processing fees.
If you offer free shipping, the fee is still calculated on the total checkout amount. The difference is that the shipping cost is hidden within your product price or absorbed by your margin.
What about VAT for UK Shopify stores?
VAT can make Shopify fee calculations more complicated. If your business is VAT registered, you may need to charge VAT on sales to UK customers, depending on what you sell. You may also be able to reclaim VAT on certain business expenses, including some Shopify fees, if valid VAT invoices are provided and the expense qualifies.
When calculating profit, be careful not to treat VAT collected from customers as your income. VAT is usually money you collect on behalf of HMRC. For example, if you sell a VATable product for £120 including VAT, the net sale is £100 and the VAT is £20. Your profit calculation should generally focus on the net amount, depending on your accounting method.
Important: VAT rules vary by business type, product category, customer location, and sales volume. It is sensible to speak to a UK accountant if you are unsure.
International sales and currency conversion
If your UK Shopify store sells internationally, your fee calculation may include additional costs. These can include currency conversion fees, international card fees, duties and taxes handling, or marketplace-style compliance costs.
For instance, if your store is based in the UK but a customer pays in euros or dollars, Shopify or your payment provider may convert that payment into pounds. The exchange rate and conversion fee can affect your final payout. International sales can be profitable, but they need careful pricing because small percentage differences add up quickly.
How to calculate your average Shopify fee per sale
Individual order calculations are useful, but your average fee per sale is often more helpful for planning. To find it, review your Shopify payouts over a month and divide total fees by the number of orders.
Use this formula:
Average Shopify fee per sale = total Shopify payment fees for the period ÷ total number of orders
For example, if you paid £320 in payment processing fees during a month and received 400 orders, your average payment fee per sale would be:
£320 ÷ 400 = £0.80 per order
You can also calculate fees as a percentage of revenue:
Total fees ÷ total sales × 100
If you paid £320 in fees on £16,000 of sales, your payment fee rate would be:
£320 ÷ £16,000 × 100 = 2%
Tips to reduce Shopify fees per sale
While you cannot avoid payment processing fees entirely, you can often reduce their impact. Consider these practical steps:
- Use Shopify Payments where possible: This may help you avoid extra third-party transaction fees.
- Review your plan: If your sales volume has grown, upgrading may reduce payment rates enough to justify the higher monthly cost.
- Increase average order value: Bundles, free shipping thresholds, and upsells can reduce the impact of fixed per-transaction fees.
- Avoid too many low-value transactions: Small orders are hit harder by fixed fees.
- Audit your apps: Remove apps that do not clearly improve sales, efficiency, or customer experience.
- Price with fees included: Build transaction costs into your retail pricing instead of treating them as an afterthought.
A quick checklist for every sale
Before deciding whether a product is profitable on Shopify, ask yourself:
- What is the total checkout value?
- Which payment method did the customer use?
- What percentage fee and fixed fee apply?
- Are there any third-party transaction fees?
- Is VAT included, and how should it be treated?
- What are the product, packaging, shipping, and fulfilment costs?
- Did an app, subscription tool, or sales channel add extra cost?
- What is the final profit after all order-level expenses?
Final thoughts
Calculating Shopify fees per sale for a UK online store is not difficult once you break the process into parts. Start with the total order value, apply the payment processing percentage, add the fixed fee, include any third-party transaction charges, and then factor in VAT, shipping, apps, and fulfilment costs where relevant.
The key is consistency. If you calculate fees the same way every time, you will quickly understand which products, order values, and customer segments are most profitable. Shopify gives you the tools to sell, but strong margin management is what helps your store grow sustainably. For UK merchants, knowing your true cost per sale is not just accounting admin; it is one of the smartest habits you can build.