Shopify checkout customization starts with one number: if fewer than about 45% of shoppers who start checkout finish, show full cost and delivery dates earlier, collect duties for cross-border orders, order express payments, and match your branding. Remove decorative add-ons rather than adding more.
The checkout is the one page on your store that Shopify has already optimized for you. Most of the conversion you are losing there was decided two pages earlier.
A merchant sees 55% of shoppers who start checkout leave without paying, and the instinct is immediate: fix the checkout. Add a progress bar, a countdown timer, a trust badge strip, a chat bubble, a last chance upsell. It feels like the right place to work because it is the page closest to the money.
That instinct is usually wrong on Shopify. The checkout is a shared, hosted flow that millions of shoppers already know, Shopify restricts what non-Plus stores can change on its main steps, and the abandonment you see there is mostly caused by information the shopper did not get earlier: the real shipping cost, the delivery date, the duties bill. Whether you are doing $10K months or $1M months, the work is the same shape. Confirm checkout is the problem, fix the few things that cause surprise, and strip out anything that slows a buyer who has already decided.
This guide covers what you can change, what is worth changing, and what I would remove, with a worked example and a stage by stage call at the end.
Every Shopify plan can brand the checkout, set its layout and form options, choose payment methods, and add apps to the Thank you and Order status pages, while apps on the information, shipping, and payment steps are reserved for Shopify Plus. That split is the single most important fact about Shopify checkout customization, because most of the tactics merchants read about assume access they do not have.
On Basic, Shopify, and Advanced plans, the standard checkout customizations Shopify describes in its help center cover your logo, background, colors, and fonts, plus checkout settings such as whether a company name or phone number is required. You can also choose between a one-page and a three-page checkout layout in the theme editor, a choice Shopify extended to the Basic, Shopify, and Advanced plans in November 2023 (Plus sets it in the checkout editor). Apps can add blocks to the Thank you and Order status pages and the post-purchase page, and the free Checkout Blocks app works on Basic with some features held back.
Shopify Plus adds the advanced layer. Shopify’s developer documentation states that checkout UI extensions for the information, shipping, and payment steps are available only to Plus stores, and the help center lists the Checkout Branding API as Plus only too. Shopify’s checkout apps availability table marks custom apps built on Shopify Functions as Plus only, while public apps built on Functions, such as those that hide or reorder payment and delivery options, are available on Basic as well.
The old code-level route is closed. Shopify’s documentation marks checkout.liquid as deprecated and unsupported for the information, shipping, and payment steps. Shopify also stopped Shopify Scripts from running on June 30, 2026, after locking editing on April 15, 2026. And Shopify’s help center confirms that August 26, 2026 was the deadline to upgrade the Thank you and Order status pages, with stores that had not upgraded moved automatically. If a tracking pixel or survey lived in the old Additional scripts box, check that it still fires.
Checkout is probably not your main problem unless fewer than about 45% of shoppers who reach checkout complete a purchase; above that line, most of the sales you are losing leak earlier in the funnel. That 45% is the minimum target used by Anthony Morgan, Founder and CEO of the Shopify conversion agency Enavi, who breaks store performance into four funnel steps when he audits a brand.
When I asked him on episode 440 about conversion rate as a vanity metric about shoppers who start typing card details and then drop off, he described the pattern he sees when brands begin testing:
Honestly, the juice isn’t worth the squeeze oftentimes on the checkout. If you were to address those issues further up the funnel, you would have way more of an impact.
His reasoning is that brands default to testing checkout because it feels close to the dollar, and because a 55% abandonment number looks alarming, but the Shopify checkout is already familiar to anyone who buys online. In his words, “The brands that struggle with it are usually the ones that they’ve got unexpected shipping costs, unclear delivery times, or a big international cohort where there’s duties and taxes, hidden fees that are getting dropped on them in checkout.”
Independent research points the same way. Baymard Institute’s cart abandonment research, last updated in September 2025, puts documented average abandonment at 70.22% across 50 studies. Among US shoppers who left for a reason other than browsing, 40% blamed extra costs such as shipping, tax, and fees, 20% said delivery was too slow, and 17% called the checkout too long or complicated. The first two are information problems you can solve before checkout. The third is the only one checkout design touches directly, and Shopify has already done most of that work. Pull your own checkout to purchase rate from Shopify Analytics before changing anything, and split it by country and device, because a healthy blended rate can hide a failing international or mobile cohort. If every segment sits above 45%, do the basics below and then put your effort into product pages and the cart.
Five checkout changes consistently earn their place on Shopify: showing total cost before checkout, showing a delivery date, ordering express payment methods, collecting duties up front for international orders, and keeping branding consistent so the handoff feels safe. Notice that only one of them, branding, happens inside the checkout editor.
First, total cost before the click. If shipping is calculated only at checkout, every shopper meets the number that Baymard’s data says drives the most abandonment at the worst moment. Put your free shipping threshold, flat rates, or a shipping estimator in the cart, so the checkout confirms a number rather than introducing one.
Second, a delivery date, not a shipping method name. “Standard shipping” tells a shopper nothing; “arrives Thursday to Monday” lets them decide. Morgan’s point was that shoppers who cannot find a delivery date go check whether the product is on Amazon, where Prime promises two days or less, which is a sale you handed to a competitor with your own traffic. The date also has to be competitive, not just visible; it does not need to be next day, but it cannot be a mystery.
Third, express payments in the right order. Shopify’s own commissioned study on Shopify Checkout claims Shop Pay can lift conversion by as much as 50% compared to guest checkout. That is Shopify’s figure from an unnamed consulting firm, so treat it as directional, but it matches what I saw during my years working with merchants at Shopify: returning shoppers with a saved Shop Pay profile finish faster. Turn on Shop Pay, Apple Pay, Google Pay, and PayPal if your customers use it, and stop there.
Fourth, duties and taxes for cross-border buyers. If more than a small share of orders ship internationally, show duties and taxes in the cart and collect them at checkout, either through Shopify Markets duty and import tax collection, which needs HS codes on your products and a carrier that supports DDP labels, or through a cross-border provider. We covered the options in detail in showing guaranteed duties and taxes inside your Shopify checkout.
Fifth, branding that matches the store. A checkout that suddenly looks generic after a carefully branded storefront creates a small moment of doubt, and Baymard found 19% of abandoners did not trust the site with their card. Logo, colors, and fonts in the checkout editor take twenty minutes on any plan.
Remove anything in checkout that asks a decided buyer to think again: countdown timers, pre-payment upsell carousels, chat widgets that cover the pay button, optional fields you never use, and badges that duplicate what Shopify already shows. Subtraction is the most underused checkout optimization I know of.
Countdown timers and fake scarcity are the easiest call. A shopper who reached checkout has already decided; a timer adds pressure without adding information, and on a page where trust matters it reads as a trick. Chat widgets are similar. Live help belongs on product pages and in the cart, where questions about fit, sizing, and shipping actually come up. Morgan’s better fix is research: mine your reviews and support ticket logs for the questions shoppers keep asking, and run a post-purchase survey that asks what almost stopped them from buying, then answer those questions before checkout.
Pre-payment upsells deserve more care. Offering a relevant add-on before payment can raise order value, but every extra decision is a chance to stall. If you want to test one, do it against completion rate and profit per visitor rather than accepted offers. A cleaner place to start is after payment, which we break down in how post-purchase upsells on Shopify should be judged.
Optional fields are the quiet one. If you never call customers, do not require a phone number. If you sell to consumers, hide the company name field. Shopify’s checkout settings let you mark these fields hidden, optional, or required, and every field you hide is one fewer thing to type on a phone.
Chase Clymer, Co-Founder and CEO of Electric Eye, made the broader version of this argument when we talked about custom builds on episode 329: “Walmart, Target, Amazon, they’ve all trained us how to buy stuff online and what the familiar patterns of a website should be.” Shopify’s checkout is one of those familiar patterns. Every element you add makes it less familiar.
The fastest way to apply this is a single audit: measure checkout completion, list every app touching checkout, and decide what to keep, move upstream, or remove. The store below is a composite, built from patterns I have seen in merchant conversations and on the podcast, not a real brand, and its numbers are illustrative.
Picture an apparel brand doing around $2M a year on the Advanced plan, with about 15% of orders going to Canada. Its checkout to purchase rate sits around 38%, below Morgan’s 45% line, so checkout genuinely deserves attention. Four apps touch checkout: a post-purchase upsell, a Thank you page survey, a trust badge app, and an urgency timer installed during a sale and never removed. Shipping is calculated only at checkout, and Canadian shoppers see duties on their doorstep, not on the order.
Here is how I would work it. The first move is upstream: add the free shipping threshold and a delivery date estimate to the cart, so shoppers stop meeting new costs at checkout. The second is cross-border: turn on duty and tax collection for Canada through Shopify Markets, because the Canadian cohort is exactly the group Morgan describes as struggling at checkout. The third is subtraction: remove the timer and the trust badge app, keep the post-purchase offer, and keep the survey because it feeds the voice of customer research that tells you what to fix next.
Then check the plumbing. With Additional scripts retired on the Thank you page, confirm the survey and any conversion pixels still fire after the automatic upgrade. And look at blocked payments your checkout analytics will not show you, because a store losing completions to declines will not fix that with layout changes.
What I would not do is buy a checkout redesign. On the Advanced plan this store cannot place blocks on the information, shipping, or payment steps anyway, and even if it upgrades to Plus later, the evidence says the gain is in cost and delivery clarity, not in decoration. A reasonable expectation is that completion moves toward the 45% baseline over a couple of months; if it does not, the next place to look is the product page, not the checkout.
Early stores should touch checkout only for branding, express payments, and field settings, growing stores should fix cost and delivery clarity upstream, and Plus brands should audit their extensions before adding more. The same principle holds at every stage; what changes is how much tooling you have and how much of it is already in the way.
If you are just starting, under roughly $50K a year, your checkout work is an afternoon. Add your logo and colors, turn on Shop Pay and the wallets your customers use, hide fields you do not need, and set a shipping policy you can state in one sentence on the product page. Do not install a checkout app yet. You do not have the traffic to measure whether it helps.
From about $500K to $5M, the leverage moves to the cart and product page. This is where free shipping thresholds, delivery date estimates, and international duties earn their keep, and where an app audit pays off, because most stores at this stage have accumulated checkout add-ons from past promotions. Our breakdown of seven checkout frictions on Shopify is a useful companion checklist for this stage.
On Plus, you have checkout UI extensions and custom Functions, which means you can do more damage as well as more good. Before adding an extension, list what is already running in checkout, confirm it was rebuilt for Scripts and the checkout.liquid retirement, and test each new block against completion rate, not against the metric the app vendor reports. You probably already know this, but the nuance most teams miss is that a checkout with fewer, well chosen blocks usually beats one that tries to sell, survey, and reassure all at once.
Yes, every Shopify plan can customize the checkout’s branding, layout, form fields, and payment methods, and can add apps to the Thank you and Order status pages. On Basic, Shopify, and Advanced plans you can change your logo, colors, fonts, and background, choose a one-page or three-page layout, and decide which fields are hidden, optional, or required. What you cannot do without Plus is add app blocks or custom UI to the information, shipping, and payment steps, which Shopify reserves for Plus stores along with the Checkout Branding API and custom apps built on Shopify Functions. For most stores under a few million in revenue, the standard options cover the changes that actually move completion.
A good checkout completion rate on Shopify is at least 45% of shoppers who start checkout going on to purchase, according to the baseline Enavi founder Anthony Morgan uses when auditing brands. He told the eCommerce Fastlane podcast that most Shopify brands clear that line because shoppers already know the Shopify checkout. If your rate is below 45%, look first for surprise costs, unclear delivery times, and international duties appearing at checkout. If your rate is above 45%, your lost sales are probably leaking earlier, on product pages or in the cart, and checkout changes will have little effect.
Both have been retired: checkout.liquid is no longer supported on the checkout steps, and checkout changes now run through the checkout editor, checkout UI extensions, and Shopify Functions. Shopify Scripts stopped running on June 30, 2026, after editing and publishing were locked on April 15, 2026, so discount and shipping logic that relied on Scripts must now run through Functions. The Thank you and Order status pages also moved to the new system, with August 26, 2026 as the upgrade deadline and remaining stores upgraded automatically. If you used the Additional scripts box for tracking pixels or surveys, confirm they still fire, because scripts in that box stop working on the upgraded pages.
Skip the countdown timer, and test any pre-payment upsell carefully against completion rate before keeping it. A shopper who reaches checkout has already decided to buy, so a timer adds pressure without adding information and can read as a trick on the page where trust matters most. Pre-payment upsells can raise order value, but each extra decision is a chance to stall, so judge them by profit per visitor and checkout completion rather than offers accepted. A safer starting point is a single relevant offer after payment, on Shopify’s post-purchase page, where it cannot block the sale.
Shop Pay tends to help, though the headline figures come from Shopify itself. Shopify reports from a study it commissioned with an unnamed consulting firm that Shop Pay can lift conversion by as much as 50% compared to guest checkout, and that its mere presence can raise lower funnel conversion by 5%. The methodology and sample are not published, so treat those numbers as directional rather than a forecast for your store. The underlying logic is sound: returning shoppers with saved details finish faster. Turning Shop Pay on costs nothing, so enable it along with the wallets your customers actually use.
