Last updated: June 2025

UK Shopify merchants pay more in fees than they realise — and the impact differs significantly by industry, order value, and payment method. Here's how to calculate your effective fee rate, what a healthy benchmark looks like, and where Pay by Bank via Fena reduces the cost structurally.

Payment fees don't feel expensive until you calculate what they're actually costing

A 2% fee sounds small. A 3.4% fee sounds slightly less small. Add Shopify's third-party gateway surcharge on top, and you're somewhere between 4% and 7% of gross revenue going to payment infrastructure on a significant portion of your orders. On a £50,000 monthly revenue store, that's between £2,000 and £3,500 a month — before a single product cost, marketing pound, or operational expense is paid.

Most UK Shopify merchants have a rough sense of what they pay in payment fees. Fewer have calculated the effective fee rate across their full payment mix — what percentage of total revenue leaves as payment costs when you account for all payment methods, the Shopify gateway surcharge where applicable, and chargeback costs — and compared it against what their gross margin can actually absorb.

This guide provides the framework for that calculation, benchmarks by industry and order value, and an honest assessment of where Pay by Bank via Fena changes the margin equation structurally.

Quick summary

• The effective fee rate most UK Shopify merchants pay is higher than their headline gateway rate suggests, because it includes Shopify's third-party gateway surcharge, a blended rate across payment methods, and periodic chargeback costs

• Industries with lower average order values (AOV) are more exposed to fixed-fee components of gateway pricing — a 25p fixed fee on a £15 order is 1.7% of that order alone

• Categories with elevated chargeback rates — CBD, digital goods, supplements, regulated products — pay a higher effective rate than the headline processing percentage suggests

• A meaningful portion of payment fee expense can be reduced structurally by adding Pay by Bank via Fena, which has lower per-transaction costs, no chargebacks, and same-day settlement

• The right target effective fee rate depends on your gross margin — a 70% margin business can absorb 3% in fees more comfortably than a 40% margin business paying the same rate

• Regular payment mix audits — understanding which payment methods are handling what proportion of volume and at what effective cost — are the most practical ongoing tool for managing this

How to calculate your actual effective fee rate

Before benchmarking or comparing payment methods, it's worth knowing your actual current effective fee rate — what percentage of total revenue you're spending on payment infrastructure.

The calculation: take all payment-related costs for a period — gateway processing fees, Shopify gateway surcharges, chargeback fees and associated losses, and any payment-related app subscriptions — and divide by total revenue for the same period. The result is your effective fee rate.

Most merchants who do this calculation for the first time find their effective rate is higher than the headline gateway rate they associate with their payment setup. The gap is usually explained by: a blended rate across multiple payment methods with different costs, the Shopify gateway surcharge on third-party payment methods, and chargeback costs that aren't tracked as part of payment fees but are effectively a payment cost.

Once you have this number, you can compare it against what your gross margin can reasonably absorb and assess where the biggest reduction opportunities are.

What a £100 order actually costs across payment methods

Using a merchant on the Shopify plan (1% third-party gateway surcharge) as a consistent basis, the approximate cost of processing a £100 order through different payment methods looks like this:

Shopify Payments (standard card):

approximately 1.9% plus £0.25, no additional Shopify surcharge. Total approximately £2.15. Net revenue approximately £97.85.

PayPal:

PayPal's own fee (approximately 3.4% plus £0.20) plus the 1% Shopify gateway surcharge. Total approximately £4.60. Net revenue approximately £95.40.

Klarna Pay in 3:

Klarna's merchant fee (approximately 5.99% plus £0.20) plus the 1% Shopify surcharge. Total approximately £7.19. Net revenue approximately £92.81.

Pay by Bank via Fena:

approximately 0.5–1% processing fee, without the Shopify third-party gateway surcharge for eligible merchants. Total approximately £0.75–£1.25. Net revenue approximately £98.75–£99.25.

On a single order the difference looks incremental. Across 1,000 orders a year, the difference between PayPal and Pay by Bank is approximately £3,000–£4,000 in additional fee cost. Across 10,000 orders it's £30,000–£40,000. The compounding effect of per-transaction fee differences is where payment method choice has its most significant commercial impact.

Fee impact by industry: where the pressure is highest

Payment fees don't affect all merchants equally. The impact depends on the interaction between average order value, gross margin, the payment methods used, and the chargeback rate for the category.

Fashion (typical AOV around £45, gross margin around 55%):

At a 2–3% effective payment fee rate, fees consume approximately 4–5% of available gross margin — tolerable but meaningful. The risk area is AOV segments below £30, where fixed-fee components of gateway pricing become disproportionately expensive. Fashion merchants with a high proportion of returns also face chargeback exposure that isn't fully captured in headline fee rates.

Beauty (typical AOV around £30, gross margin around 70%):

High gross margins provide more cushion, but the lower AOV means fixed-fee components matter more. A payment method with a 25p fixed fee on a £30 order is already 0.83% of that order before the percentage component is applied. For beauty merchants with significant PayPal or Klarna volume, the effective rate is typically above 4%, which consumes a meaningful share of the available margin.

CBD and regulated supplements (typical AOV around £60, gross margin around 65%):

This category faces a double fee challenge. Standard card processors often either decline to support these categories or impose elevated fees for the risk classification. Chargeback rates are typically higher than standard retail. And the Shopify gateway surcharge applies if Shopify Payments doesn't support the category — which it often doesn't. Effective fee rates of 6–8% are not uncommon, which is structurally unsustainable at margins that are otherwise healthy. Pay by Bank via Fena addresses this directly — it isn't subject to the card network category restrictions that drive these elevated costs.

Digital goods (typical AOV around £15–£20, gross margin around 85–90%):

High margins and low AOVs create a paradox. The gross margin can absorb fees in percentage terms, but the low AOV makes fixed-fee components structurally expensive. On a £15 digital product, the 25p fixed component of a standard card fee is 1.7% of the order before the percentage component applies. Payment methods with lower or no fixed-fee components are more cost-efficient at this AOV.

High-value retail (AOV £200+):

Fixed-fee components become negligible at high AOVs. The cost sensitivity shifts to the percentage component — where differences of 1–2% between payment methods translate to meaningful absolute savings per transaction. Chargeback exposure is also more significant in absolute terms, making the chargeback-free nature of Pay by Bank more commercially valuable at higher transaction values.

AOV and fee sensitivity: choosing the right payment mix

The sensitivity of your margins to payment fees is a function of both your gross margin and your average order value. These two variables together determine how much you can afford to pay per transaction and where optimisation is most valuable.

Lower AOV stores (under £30):

Fixed-fee components hit hardest here. Look for payment methods with low or no fixed fees. Pay by Bank's cost structure is typically more favourable at lower AOVs than standard card processing. Avoid payment methods with premium fixed fees where AOV doesn't justify them.

Mid-range AOV stores (£30–£100):

This is where blended payment method strategy matters most. The right combination of Shopify Payments for broad card coverage, Pay by Bank for the growing segment that prefers it, and selective use of BNPL like Klarna where AOV justifies the fee — rather than defaulting to the highest-cost options for all volume — produces the best margin outcome.

Higher AOV stores (over £100):

Percentage-based fee differences have more absolute impact. At £200+ AOV, switching from a 3.5% effective rate to a 1.5% effective rate saves £4 per transaction — which compounds rapidly at scale. The chargeback-free benefit of Pay by Bank is also more valuable in absolute terms at higher transaction values.

When is it worth upgrading your Shopify plan to reduce fees?

Shopify's higher-tier plans reduce the Shopify gateway surcharge — from 2% on Basic to 1% on Shopify to 0.5% on Advanced. They also reduce the card processing rate if you use Shopify Payments. Whether upgrading is worth the higher monthly plan fee depends on your transaction volume and payment method mix.

The calculation: take the monthly fee saving from the lower surcharge or processing rate at your current volume, and compare it to the monthly plan cost increase. If the fee saving exceeds the plan cost increase, the upgrade pays for itself.

As a rough guide, the Shopify plan (at approximately £65/month more than Basic) makes sense on the surcharge saving alone when third-party gateway volume exceeds approximately £6,500 per month. The Advanced plan requires higher volume to justify the step-up.

Merchants who add Pay by Bank via Fena and move a significant portion of volume to it may find the surcharge saving from a plan upgrade matters less, because less volume is going through third-party gateways where the surcharge applies.

Practical steps for reducing your effective fee rate

Calculate your current effective fee rate.

Add up all payment costs — processing fees, Shopify surcharges, chargeback costs — for a recent month and divide by revenue. If you don't know this number, finding it is the most valuable single step in payment cost management.

Add Pay by Bank via Fena.

For most UK Shopify merchants, this is the single change that produces the largest reduction in effective payment costs. Lower processing fee, no chargebacks, same-day settlement, and no Shopify gateway surcharge for eligible merchants. It works alongside existing payment methods rather than replacing them.

Review your payment method mix.

Understand what proportion of volume goes through each payment method and what each one costs. If a significant proportion of orders go through PayPal or Klarna without a specific commercial reason, redirecting that volume to lower-cost alternatives — including Pay by Bank — reduces the effective rate.

Assess your chargeback exposure.

For categories with elevated dispute rates, chargeback costs can add 0.5–2% to the effective fee rate that doesn't appear in processing fee line items. Reducing card volume through Pay by Bank reduces this exposure proportionally.

Consider plan tier in the context of your full payment mix.

Plan upgrade decisions should account for the full picture — what proportion of volume is on third-party gateways, how much of that could move to Pay by Bank, and what the net saving is across both changes.

Frequently asked questions

What is a healthy effective payment fee rate for UK Shopify merchants?

It depends on gross margin, but as a general target: merchants with gross margins above 60% should aim to keep effective payment fees below 3% of revenue. Margins between 40–60% make anything above 2.5% difficult to absorb without affecting profitability. For low-margin businesses, even 1.5–2% is worth actively managing.

How do Shopify fees differ by industry?

The impact varies based on AOV, gross margin, and category chargeback rates. CBD and regulated supplement merchants often face the highest effective rates due to high-risk payment processor premiums and elevated dispute rates. Fashion and beauty merchants are most affected by fixed-fee components at lower AOVs. Digital goods businesses have high gross margins but are sensitive to fixed fees at low transaction values.

Does adding Pay by Bank to Shopify reduce my effective fee rate?

Yes, for the volume that shifts to Pay by Bank. The processing fee is lower than cards, there are no chargebacks, and the Shopify third-party gateway surcharge may not apply for eligible merchants. The net effect on your effective rate depends on what proportion of your volume moves to Pay by Bank.

When should I consider switching payment methods versus upgrading my Shopify plan?

Both can reduce effective fee rates, but payment method optimisation typically produces larger savings at lower cost. A Shopify plan upgrade has a fixed monthly cost increase; the saving depends on your specific volume and payment mix. Adding Pay by Bank via Fena has minimal implementation cost and produces savings immediately on each transaction that goes through it.

Does Pay by Bank work for CBD, regulated supplements, and other restricted categories?

Yes. Pay by Bank via Fena is available to UK Shopify merchants in regulated categories that card processors often restrict or price at a premium. Because Pay by Bank uses open banking rails rather than card network infrastructure, card network acceptable use policies don't apply. Fena also includes compliance tooling for regulated categories.

How do chargebacks affect my effective fee rate?

Each chargeback costs £10–£25 in fees, plus the reversed transaction value and internal handling time. At a 1% chargeback rate on £500,000 revenue, the direct cost is 5,000 chargebacks per year (assuming average £100 order) — but in practice even 0.5% of transactions as chargebacks on £500k is 2,500 cases at £10–£25 each, equalling £25,000–£62,500 annually in chargeback fees alone. Pay by Bank eliminates this cost category on Pay by Bank transactions.