Shopify Payment Options: What the Alternatives Actually Cost

The platform fee is a plan setting, not a processor setting

Shopify's pricing page answers the question directly: there are no setup fees on any plan, and "third-party transaction fees may apply when you use a third-party payment provider (instead of Shopify Payments). The rate depends on your plan." Checked on 17 September 2026, the published third-party transaction fee falls across the plan tiers, from the entry plan down to a fraction of that on the top tier. The consequence is the part merchants miss: the fee moves when your plan moves, not when your processor moves. A quote from an outside processor that looks better on the card rate can be worse in total once the platform fee is added, and the same quote can flip to better after a plan upgrade you were going to make anyway. Read your own plan's published figure off Shopify's pricing page on the day you compare, and put it into the comparison as a line of its own.

Add it to the quote before you read the quote

The discipline is mechanical. Take your monthly card volume and your transaction count, apply the outside processor's quoted rate and per-transaction amount, then add your plan's published third-party transaction percentage on top of the same volume. Compare that total against Shopify Payments' published rate for your plan and region. Nobody can tell you which wins without those inputs, because the answer is arithmetic on figures specific to your store — and anyone quoting you a result without asking for your plan tier has skipped the step that decides it. Our guide to reading an effective rate sets out how to get the volume and count figures off a statement rather than estimating them.

Which checkout you choose changes your PCI questionnaire

This is the part that never appears on a rate sheet. The PCI Security Standards Council describes SAQ A as covering "merchants with account data functions completely outsourced to PCI DSS validated and compliant third parties, where the merchant retains only paper reports or receipts with account data," and says SAQ A merchants "do not store, process, or transmit any account data in electronic form on their systems or premises." In January 2025 the Council removed Requirements 6.4.3 and 11.6.1 for payment page security and Requirement 12.3.1 from SAQ A, and added an eligibility criterion requiring merchants to confirm their site is not susceptible to attacks from scripts that could affect the merchant's e-commerce systems. That new criterion is not universal. The Council's FAQ states it "only applies to e-commerce merchants with a webpage that includes a TPSP's/payment processor's embedded payment page/form (for example, one or more inline frame(s) (iframes))" and "does not apply to e-commerce merchants with a webpage that redirects customers" to the provider, or that fully outsource payment functions. Whether your chosen provider redirects or embeds therefore decides how much of SAQ A you have to answer for.

Who holds the card fields on a Shopify checkout

Shopify's developer documentation for payments extensions distinguishes the types on exactly this axis. A credit card payment extension lets merchants accept credit card purchases on their checkout; a custom credit card payment extension lets partners "define the specific credit card hosted fields needed to process custom credit cards directly on checkout"; an offsite payment extension "allows merchants to redirect their buyers to an app-hosted website to complete the payment process." Shopify also notes that only approved partners can build payments extensions on its payments platform, and that custom payment extensions are limited to eligible Shopify Plus merchants. Ask a prospective provider which of those types their app is, then take the answer to the PCI criteria above. That is a question with a documented answer, unlike most of what gets said in a switching conversation.

The operational argument, stated without the marketing

Running one processor across your in-store terminals and your Shopify checkout gives you one settlement stream, one statement and one effective rate to monitor, which is a real reduction in reconciliation work rather than a rate advantage. It is worth something; how much is a judgement about your own bookkeeping, not a figure anyone can quote you. Weigh it after the arithmetic above, not instead of it. Our reconciliation guide covers what actually makes a card deposit hard to match, and it is mostly the number of separate streams.

An illustrative example of the comparison

Illustrative example, made-up round numbers. A store on a mid-tier plan runs 1,000 orders a month at an average of $100, so $100,000 of volume. An outside processor quotes a headline rate below what the store pays today. The platform fee published for that plan applies to the same $100,000 and lands on top of the outside processor's charges, while Shopify Payments would not attract it. Whether the outside quote still wins depends entirely on the gap between the two card rates versus the platform percentage — and on whether a plan change, made for unrelated reasons, moves the platform percentage. Run it on your own plan figure and your own volume; do not run it on someone else's example, including this one.