Shopify Payments at Scale: Should High-Volume Merchants Use Another Payment Provider?

Shopify Payments and Gateways

Shopify Payments is convenient.

For many businesses, that convenience is one of its biggest strengths: payments, orders, refunds and reconciliation can sit within the same Shopify environment without the merchant needing to establish a separate payment-provider integration.

But as a Shopify business grows, the payment question changes.

Instead of asking:

“Can Shopify take our payments?”

an established merchant may need to ask:

“Is our current Shopify payment structure still commercially and strategically right for the scale of business we have become?”

That distinction matters.

A merchant processing £20 million, £50 million or £100 million a year through Shopify has very different payment economics from a smaller ecommerce business. A few basis points of cost, a change in payment authorisation performance or a different international acquiring structure can become financially material.

At the same time, moving away from Shopify Payments can introduce additional Shopify transaction fees and may affect some of the native payment functionality the merchant currently benefits from.

The decision therefore should not be:

Shopify Payments vs another PSP: which is cheaper?

It should be:

What is the total commercial and operational value of each payment structure?

This guide is primarily for established Shopify and Shopify Plus merchants processing significant online payment volume, particularly businesses reviewing costs, expanding internationally, considering another payment provider or questioning whether their existing payment architecture still fits their scale.

For the wider payment strategy at scale, see our High-Volume Merchant Processing guide and Payments Strategy Library.

Key Takeaways

Shopify Payments can remain a very strong payment solution for high-volume merchants. There is no turnover level at which a business automatically needs to leave it.

But larger merchants should periodically review:

• their total effective payment cost;
• Shopify Payments pricing;
• third-party transaction fees;
• card mix;
• international and cross-border costs;
• authorisation rates;
• Shop Pay and wallet performance;
• settlement and reconciliation;
• international acquiring requirements;
• Shopify POS and omnichannel requirements;
• multiple entities and markets;
• whether another PSP offers functionality they actually need; and
• the technical and operational cost of changing payment structure.

Shopify currently supports both Shopify Payments and approved third-party payment providers. It also now supports a model where Shopify Payments can operate alongside one direct third-party payment provider in eligible configurations.

However, using a third-party provider can create additional Shopify fees, so an external PSP should not be compared with Shopify Payments on processor pricing alone.

At scale, convenience needs to be priced — but complexity does too.

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Shopify Payments Is More Than a Payment Gateway

For established Shopify merchants, it is important to understand what is actually being replaced before comparing Shopify Payments with another processor.

Shopify Payments is deeply integrated into the wider Shopify environment.

Shopify currently highlights features including:

• payment and order management within Shopify;
• automated reconciliation;
• refund management;
• chargeback management;
• Shop Pay;
• Apple Pay and Google Pay;
• local payment methods;
• multi-currency selling;
• fraud and risk tools; and
• integration with Shopify POS.

Shopify states that its Plus payment proposition can support selling in more than 133 global currencies and describes Shop Pay as exclusive to Shopify Payments. See Shopify Payments for Shopify Plus.

That means another PSP should not simply be compared against the headline Shopify Payments card rate.

The merchant needs to understand the value of the wider payment ecosystem it is using today.

MAS View

For an established Shopify merchant, the question isn't whether another PSP can process cards. It is whether another payment structure creates enough value to justify changing an ecosystem that already works.

Can You Use Another Payment Provider With Shopify?

Yes.

Shopify supports third-party payment providers, and its current Shopify Plus proposition promotes connectivity with more than 100 international payment providers.

But being technically able to use another PSP does not automatically mean it is commercially advantageous.

A Shopify merchant considering another payment provider needs to calculate:

external PSP costs + Shopify third-party transaction fees + integration and operational costs

and compare this with:

current Shopify Payments costs + operational value + payment performance

The correct comparison is therefore the total payment cost and value, not simply the processor's quoted percentage.

For businesses comparing the wider payment-provider relationship rather than Shopify compatibility alone, see our Ecommerce Payment Providers UK guide, covering PSPs, gateways, acquiring, pricing, international payments and provider switching.

What Are Shopify's Third-Party Payment Provider Fees?

Shopify can charge an additional transaction fee when merchants use a third-party payment provider instead of Shopify Payments.

As of August 2026, Shopify's public UK pricing page lists the following third-party transaction fees:

These are Shopify's publicly displayed UK rates at the time this guide was reviewed. Shopify pricing and individual Plus commercial arrangements can vary, so merchants should check their own contract and Shopify admin before making a commercial decision.

See the current Shopify UK pricing page.

Why 0.2% Can Still Matter to a Shopify Plus Merchant

A percentage such as 0.2% can appear small.

At enterprise payment volumes it may not be.

These calculations are illustrative and simply apply 0.2% to the stated payment volume. They do not account for an individual Shopify contract, exempt transactions, the external PSP's own pricing or other costs.

But they demonstrate why payment-provider selection at scale needs a full financial model.

Suppose another PSP appears to save the merchant £75,000 a year in processing costs.

If moving to that provider introduces £100,000 of additional Shopify transaction fees, the apparently cheaper processor may actually increase the merchant's overall payment cost before any migration or operational expenditure is considered.

Equally, if another structure creates materially better acquiring economics, payment performance or international capability, paying an additional Shopify fee may still be commercially justified.

The numbers need to be modelled together.

The Shopify Plus Payment Equation

A useful way to compare the options is:

Alternative PSP total processing cost

+

Shopify third-party transaction fees

+

implementation and operational cost

+

any lost native functionality or additional technology cost

versus:

Shopify Payments total processing cost

+

international, FX and other relevant costs

+

payment-performance impact

The lowest headline transaction rate does not necessarily produce the lowest overall cost.

For more detail on analysing the full payment-cost stack, see our guides to auditing payment fees for high-turnover businesses and reducing payment fees when processing £1m+ per month.

Can You Use Shopify Payments and Another PSP at the Same Time?

Shopify's current payment architecture makes this question more interesting than it used to be.

Shopify now documents a configuration where an eligible merchant can use Shopify Payments alongside one direct third-party payment provider.

In this structure:

• the third-party provider is the primary processor for credit and debit card transactions;
• Shopify Payments can process Shop Pay and local payment methods not offered through the third-party provider;
• Shopify Payments can act as a backup for certain eligible failed card transactions; and
• payment recovery can retry an eligible failed card transaction through Shopify Payments.

See Shopify's current guidance on using Shopify Payments with a third-party provider.

This potentially gives larger merchants more payment flexibility without completely giving up Shopify Payments.

But it also makes the commercial calculation more complicated.

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What Does the Mixed Shopify Payments and Third-Party Model Cost?

Shopify currently states that when Shopify Payments is used alongside a direct third-party provider:

• transactions processed by the third-party provider are subject to Shopify's third-party transaction fee based on the merchant's plan; and
• transactions processed through Shopify Payments in that mixed-provider configuration are charged at the standard Shopify Payments rate plus a 1.25% premium.

Shopify also states that the standard Shopify Payments rate plus the 1.25% premium applies when its payment-recovery functionality successfully recovers an eligible failed transaction from the third-party provider.

See Shopify's current payment-fee guidance.

This is a significant consideration for high-volume merchants.

A mixed-provider structure might create additional acquiring, payment-method or resilience benefits, but it needs to be modelled using the actual distribution of transactions across each provider.

MAS View

“Can we connect another PSP?” is no longer the most useful Shopify question.

The better question is:

“Which transactions would each provider process, what would each route cost, and what commercial or performance benefit would the additional complexity create?”

There Are Three Sensible Outcomes to a Shopify Payment Review

1. Keep Shopify Payments

For some high-volume merchants, Shopify Payments will remain the most commercially and operationally sensible structure.

Reasons might include:

• competitive existing pricing;
• strong payment performance;
• Shop Pay conversion;
• simple reconciliation;
• effective international functionality;
• good operational experience;
• Shopify POS integration;
• no compelling requirement for another provider; and
• avoiding additional third-party transaction fees.

A payment review does not need to end with a switch to be valuable.

Sometimes the correct conclusion is:

keep the existing provider, but understand why.

2. Add or Move to Another Payment Provider

An external PSP may warrant consideration where it offers a specific commercial or operational advantage.

That could include:

• more appropriate acquiring in an important market;
• better economics at significant payment volume;
• a required payment method;
• better support for a specific payment flow;
• specialist international requirements;
• different settlement requirements;
• an existing group-wide acquiring relationship;
• payment-performance improvements; or
• a strategic requirement that Shopify Payments does not currently fulfil.

The important point is that the reason should be specific and measurable.

3. Review the Wider Payment Architecture

For some very large or complex Shopify merchants, the question is bigger than:

Shopify Payments or another PSP?

The merchant may need to consider:

• multiple acquiring relationships;
• regional payment strategies;
• multi-entity structures;
• local acquiring;
• payment orchestration;
• omnichannel payments;
• payment-data ownership;
• provider concentration risk; and
• how Shopify fits into the wider enterprise commerce architecture.

For businesses already thinking in this way, our Acquirer-Agnostic Payment Gateways guide explores the wider multi-provider question.

At What Volume Should You Review Shopify Payments?

There is no universal payment-volume threshold at which Shopify Payments suddenly becomes unsuitable.

A review is worthwhile when the financial or strategic value of payments has become large enough that the existing arrangement deserves proper analysis.

For an established merchant processing approximately £750,000 or more per month, even relatively small differences in payment costs can become material.

At £1 million per month, a difference equivalent to 0.10% represents £12,000 per year.

At £5 million per month, the same 0.10% represents £60,000 per year.

At £10 million per month, it represents £120,000 per year.

That does not mean another provider will necessarily save that amount.

It simply means payments have reached a scale where proper analysis can be commercially worthwhile.

The Shopify Payments Review: Five Numbers to Know

1. Annual Shopify Payment Volume

How much payment volume actually passes through Shopify each year?

Do not rely only on company turnover if some revenue is processed elsewhere.

2. Current Effective Payment Cost

Calculate the full payment cost, not simply the headline card rate.

This may include:

• processing fees;
• international card charges;
• FX;
• chargeback fees;
• currency-conversion costs;
• refund-related costs;
• apps or additional payment technology; and
• other material payment charges.

3. Shopify Cost of Using Another PSP

Calculate the third-party transaction fee applicable to the merchant's actual Shopify plan or Plus agreement.

If considering Shopify Payments alongside another provider, model the mixed-provider pricing separately.

4. Alternative PSP Economics

Understand the proposed external PSP's complete pricing.

For sophisticated merchants this might involve:

• blended pricing;
• Interchange Plus;
• IC++;
• gateway fees;
• authorisation charges;
• international-card pricing;
• scheme costs;
• settlement; and
• other provider fees.

For more on this distinction, see our guide to when high-turnover businesses should review blended pricing versus IC+ or IC++.

5. Payment Performance

This is the number most likely to be missed in a simple fee comparison.

A payment provider that costs slightly more but authorises more legitimate transactions may generate more revenue than the cheapest provider.

The business should therefore assess payment acceptance alongside payment cost.

See our guide to improving payment authorisation rates for enterprise merchants.

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A Cheaper PSP Can Still Produce a More Expensive Outcome

Consider an established Shopify merchant processing £50 million annually.

An external PSP presents a materially lower processing proposal.

On the surface, switching looks straightforward.

But the business then needs to account for:

• Shopify's third-party transaction fee;
• any Shopify Payments costs retained within a mixed-provider setup;
• integration work;
• testing;
• reporting changes;
• reconciliation;
• customer-service processes;
• payment-method differences;
• Shop Pay implications;
• migration risk; and
• payment performance.

The cheapest processor quote is therefore not necessarily the cheapest payment architecture.

Payment Authorisation Can Matter More Than a Few Basis Points

Imagine a merchant processes £100 million of attempted annual card volume.

A payment-cost saving is valuable.

But so is successfully authorising legitimate transactions that would otherwise have been declined.

This is why payment optimisation at scale cannot be treated solely as a fee-reduction exercise.

Useful analysis may include authorisation rates by:

• country;
• issuer;
• card type;
• debit vs credit;
• domestic vs international;
• new vs returning customer;
• 3D Secure journey;
• payment method; and
• decline reason.

A proposed provider should ideally be evaluated on the payment traffic the merchant actually has rather than on generic claims about conversion.

International Growth Can Be a Reason to Review the Payment Structure

Shopify Payments already provides substantial international functionality.

For many merchants, Shopify Markets and Shopify Payments may support the international experience they require without needing another PSP.

Shopify currently promotes Shopify Plus Payments as supporting sales in more than 133 global currencies, alongside local payment methods and localised international commerce.

But international growth can still create new payment questions.

For example:

• Where are transactions being acquired?
• What percentage of transactions are now international cards?
• What FX costs are being incurred?
• Would local acquiring be commercially beneficial in a strategic market?
• Does the group now have local legal entities?
• Are payment authorisation rates different between markets?
• Are local payment methods important to conversion?
• Does settlement need to occur in multiple currencies?
• Would a regional or global PSP structure be more appropriate?

These are enterprise payment questions rather than simple Shopify configuration questions.

Review Currency Conversion as Well as Card Processing

International Shopify merchants should separate:

card-processing cost

from:

currency-conversion and settlement cost.

Shopify changed the way Shopify Payments currency-conversion fees and multi-currency payout fees are calculated from 6 April 2026, with relevant fees now calculated directly on the gross order amount.

See Shopify's current currency-conversion fee guidance.

For merchants with substantial international volume, FX and settlement structure can become significant components of the wider payment-cost review.

Multi-Entity Shopify Businesses Need to Be Particularly Careful

Shopify's current multi-entity functionality creates additional payment considerations.

Shopify states that selling with multiple entities is available only with Shopify Payments, and its current documentation places restrictions around third-party providers within multi-entity structures.

For example, Shopify currently states that Shopify Payments cannot be used alongside a third-party provider in a multi-entity setup in the same way as the standard mixed-provider configuration.

See Shopify's multi-entity payment guidance.

This makes payment-provider selection particularly important for international groups considering multiple Shopify entities.

A business should map its future entity and market structure before assuming that the payment architecture used today can simply be replicated globally.

Shop Pay Has a Commercial Value Too

Shop Pay should not be treated as a minor checkout feature when evaluating a change.

Shopify describes Shop Pay as an accelerated checkout exclusive to Shopify Payments.

For merchants where Shop Pay represents a significant proportion of checkout usage, its impact should be measured rather than assumed.

Before changing payment structure, establish:

• what percentage of customers currently use Shop Pay;
• how those customers convert;
• average order value;
• repeat-customer usage;
• what the alternative checkout journey would be; and
• whether Shop Pay can remain available under the proposed configuration.

Shopify now allows eligible merchants to retain Shop Pay within certain mixed Shopify Payments and third-party provider structures, which is another reason to analyse the exact proposed configuration rather than relying on older assumptions.

What About Shopify POS and Physical Stores?

For omnichannel retailers, the payment decision can extend beyond ecommerce.

A Shopify merchant may operate:

• online stores;
• retail stores;
• pop-up locations;
• events;
• international stores; and
• other physical sales channels.

Shopify promotes Shopify Payments and Shopify POS as a unified online and in-store payment environment.

For a multi-site retailer, switching online acquiring may therefore raise wider questions about:

• terminal estates;
• refunds across channels;
• customer profiles;
• reconciliation;
• reporting;
• store operations;
• merchant accounts; and
• omnichannel payment data.

The payment decision should be mapped across the whole retail estate rather than considered only at ecommerce checkout.

Should Shopify Merchants Use Multiple Payment Providers for Resilience?

Potentially, but resilience has a cost.

Shopify's mixed-provider payment recovery functionality now provides one form of additional payment routing for eligible merchants using Shopify Payments alongside a third-party provider.

But more sophisticated multi-provider strategies may involve additional complexity.

Businesses should ask:

• What failure are we protecting against?
• How often has it historically occurred?
• How much revenue is genuinely at risk?
• Can transactions be routed to another provider?
• What does the additional provider cost?
• How does finance reconcile both providers?
• How are refunds handled?
• How are payment tokens managed?
• Does Shopify support the proposed configuration?

Multi-provider architecture should solve a defined commercial or resilience problem, not simply exist because having two PSPs sounds safer.

Changing PSP on Shopify Is Still a Migration Project

Shopify can reduce some of the technical complexity associated with changing payment providers, but larger merchants should still consider the migration carefully.

Relevant questions may include:

• What happens to stored payment credentials?
• What happens to subscriptions?
• Can existing customer payment methods move?
• How will refunds against historic transactions work?
• How will finance reconcile old and new providers?
• Can providers be run in parallel?
• How will the new configuration be tested?
• What happens to chargebacks on historic transactions?
• When can the old provider genuinely be decommissioned?

For businesses with deeper payment dependencies, see our Enterprise PSP Migration Guide and our guide to moving stored cards, tokens and recurring payments between payment providers.

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When Should a Shopify Merchant Probably Stay With Shopify Payments?

Staying with Shopify Payments may make sense where:

• pricing remains commercially competitive;
• authorisation performance is strong;
• Shop Pay is commercially important;
• the merchant values unified reconciliation;
• international functionality meets the requirement;
• Shopify POS is strategically important;
• there is no compelling acquiring requirement elsewhere;
• another PSP would introduce significant third-party transaction fees; and
• the operational simplicity has genuine value.

There is nothing strategically sophisticated about switching provider simply because a business has become large.

The objective is better payment economics and architecture, not change for its own sake.

When Might Another PSP Be Worth Reviewing?

A review may be justified where:

• payment volume has grown substantially since original pricing was agreed;
• the business has received materially different acquiring proposals;
• international-card costs have become significant;
• the merchant has expanded into new countries;
• local acquiring has become strategically relevant;
• payment authorisation performance needs investigation;
• the group already has another enterprise acquiring relationship;
• the business requires functionality not available within its current structure;
• payment resilience has become a board-level requirement;
• the business has undergone an acquisition or merger;
• multiple entities now need to be considered; or
• payment costs have become material enough to warrant an independent review.

Don't Benchmark Shopify Payments Using Headline Competitor Rates

Comparisons such as:

“Provider A charges X% while Shopify charges Y%”

can be misleading for high-volume merchants.

Payment cost can depend on:

• interchange;
• scheme fees;
• domestic vs international cards;
• commercial cards;
• debit vs credit;
• transaction values;
• gateway costs;
• authorisation fees;
• FX;
• refunds;
• chargebacks;
• Shopify third-party fees; and
• individual negotiated pricing.

Use transaction data from the actual business.

Our UK Merchant Fees Benchmark 2026 provides additional context on how payment costs are structured.

The MAS Shopify Payments Review

For an established Shopify or Shopify Plus merchant, Merchant Advice Service would start with the current payment estate rather than immediately producing a list of alternative providers.

The review would consider areas such as:

• annual and monthly card volume;
• average transaction value;
• current Shopify plan;
• Shopify Payments pricing;
• current effective payment cost;
• card mix;
• international-card percentage;
• currencies;
• main customer markets;
• authorisation performance;
• Shop Pay usage;
• local payment methods;
• Shopify POS requirements;
• legal entities;
• international expansion plans;
• existing PSP or acquiring relationships;
• technical requirements; and
• the reason the business is considering change.

From there, the merchant can assess three realistic outcomes:

retain Shopify Payments

introduce or move to another PSP

or

review the wider payment architecture.

This prevents provider selection from happening before the commercial problem has been properly defined.

For more about the process, see How Merchant Advice Service Works and How MAS Researches and Compares Payment Providers.

What If Your Business Is High Risk or Shopify Payments Is Not Available to You?

This guide is primarily about payment optimisation for established merchants that are already successfully processing through Shopify.

Businesses operating in restricted or higher-risk sectors can face a different problem: provider eligibility and underwriting may need to be resolved before payment optimisation can be considered.

For that situation, see our separate guide to High-Risk Merchant Accounts for Shopify.

Sources & Further Reading

Shopify UK — Shopify Payments for Shopify Plus

Current Shopify information covering Shopify Payments, Shop Pay, international currencies, reconciliation, third-party processors and Shopify POS.

Shopify Payments for Shopify Plus

Shopify UK — Pricing

Shopify's current public UK pricing, including published third-party transaction fees by plan.

Shopify UK pricing

Shopify Help Centre — Using Shopify Payments With a Third-Party Provider

Current guidance covering the mixed-provider model, payment routing, payment recovery, fees and restrictions.

Using Shopify Payments with a third-party provider

Shopify Help Centre — Shopify Payments Fees

Current guidance covering Shopify Payments charges and additional fees where a direct third-party provider is used.

Shopify Payments fees

Shopify Help Centre — Shopify Payments in the UK

Current information covering Shopify Payments functionality, payment methods, order management and UK availability.

Shopify Payments for the United Kingdom

Shopify Help Centre — Selling With Multiple Entities

Current Shopify documentation covering multi-entity payment structures and relevant third-party provider restrictions.

Shopify multi-entity payment guidance

Related Merchant Advice Service Guidance

• Payments Strategy Library
• High-Volume Merchant Processing
• How High-Turnover Businesses Audit Payment Fees
• How to Reduce Payment Fees When Processing £1m+ Per Month
• UK Merchant Fees Benchmark 2026
• How Enterprise Merchants Improve Payment Authorisation Rates
• Blended Pricing vs IC+ and IC++
• Acquirer-Agnostic Payment Gateways
• Changing Payment Provider: Enterprise PSP Migration Guide
• Moving Stored Cards, Tokens and Recurring Payments
• High-Risk Merchant Accounts for Shopify

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Editorial and Commercial Disclosure

Merchant Advice Service is an independent payments information, comparison and provider-matching service.

Merchant Advice Service is not affiliated with Shopify, and Shopify has not paid for inclusion in this article.

MAS may receive commission or a referral fee from some payment providers where a business chooses to proceed following an introduction. This does not determine the factual information, analysis or provider capabilities included in this guide.

This article does not recommend that Shopify merchants automatically replace Shopify Payments. For many businesses, Shopify Payments may remain the most appropriate payment structure.

Shopify pricing, transaction fees, payment features, third-party provider functionality, Shopify Plus arrangements and international capabilities can change. Merchants should verify the terms applicable to their own Shopify plan, contract and location before making a commercial decision.

Worked cost calculations within this guide are illustrative examples only and do not represent guaranteed savings or the terms of any individual Shopify or payment-provider agreement.

Payment-provider suitability depends on factors including processing volume, business model, geography, card mix, technical requirements, payment methods and provider underwriting.

Merchant Advice Service does not make payment-provider underwriting decisions or guarantee merchant-account acceptance, pricing, authorisation-rate improvements or commercial savings.

Shopify information and public pricing last checked: 25 August 2026

This guide provides general payments information and should not be treated as legal, regulatory, technical, financial or tax advice.