The checkout is the single most important page on your store. Every friction point between "add to cart" and "order confirmed" costs you revenue. Shopify's move to a one-page checkout was designed to reduce that friction — but the layout change alone does not guarantee higher conversions. How you configure and optimize the checkout determines how much of that potential you capture.
This guide covers what changed with Shopify's one-page checkout, the specific optimizations that move the conversion needle, and how to think about testing.
What Changed: Three Pages to One
Shopify's legacy checkout separated the process into three distinct pages:
- Contact info + shipping address
- Shipping method selection
- Payment information
Each page transition created an opportunity for drop-off. Customers had to click "Continue" multiple times, and each step felt like progress toward a commitment that some buyers wanted to avoid.
The one-page checkout puts all three sections on a single scrollable page. Customers fill out their information in sequence — contact, address, shipping, payment — but they can see everything at once. The psychological effect is significant: the checkout looks shorter, even though the total number of fields is identical.
Key structural differences:
- Order summary is now a persistent sidebar (desktop) or collapsible section (mobile)
- All steps visible simultaneously rather than hidden behind page transitions
- Progress indicators are de-emphasized — there is less sense of stages to pass through
- Payment section appears after shipping selection, which speeds up the flow for customers who quickly select the default shipping option
The Checkout Editor: Your Primary Optimization Tool
In your Shopify admin, go to Settings > Checkout > Customize checkout to open the Checkout Editor. This is where most optimization work happens.
Branding elements you can customize:
- Logo (upload and position at the top of the checkout)
- Banner image (optional hero image below the logo)
- Background colors (checkout page, sidebar, form fields)
- Button color and text color (this is your call-to-action styling)
- Font selection (limited to Shopify's available font options)
- Form label style (floating vs. static labels)
Functional elements:
- Show/hide company name field
- Show/hide address line 2 (reducing fields can increase completion rates)
- Enable or disable tipping
- Order notes field (hide it unless your business needs it — extra fields add friction)
- Custom payment methods display order
Field Reduction: Remove What You Do Not Need
Every unnecessary form field is an opportunity for cart abandonment. Audit your checkout fields and remove anything not required for fulfillment:
Fields to consider hiding:
- Company name (unless you have significant B2B sales)
- Address line 2 (make it accessible via a "Add apartment, suite" link rather than showing the field by default)
- Order notes (show only if your fulfillment process requires them)
- Phone number (required in some countries for shipping carriers, but check if it is mandatory for yours)
Shopify's own data suggests that removing one unnecessary field can improve checkout completion rates by 1-3%. If you have five optional fields that most customers skip past, that is meaningful friction.
Trust Signals: Where They Work and Where They Do Not
Trust signals in checkout reduce payment hesitation. The research on placement is consistent: signals closest to the payment input fields have the highest impact.
High-impact placements:
- Directly above or below the payment section (security badge + "SSL encrypted")
- Within the order summary sidebar (money-back guarantee + return policy line)
- Below the "Complete order" button (brief reassurance statement)
Lower-impact placements:
- At the very top of the checkout (customers see it but have already scrolled past by the time they hesitate)
- Below the fold in a location customers never reach
Trust signals that perform well in checkout:
- SSL/secure payment icons (Visa, Mastercard, PayPal, Apple Pay logos)
- Money-back guarantee (specific timeframes outperform vague promises: "30-day returns" not "easy returns")
- Shipping timeline ("Ships within 24 hours" is more reassuring than "fast shipping")
- Business legitimacy markers (founded year, customer count, review count with average rating)
To add custom trust content to your checkout, you need a Checkout UI Extensions-compatible app or a developer to build an extension. On Shopify Plus, you have more control. On standard plans, some checkout apps provide pre-built trust signal blocks.
Shop Pay: The Conversion Multiplier
If you are not actively promoting Shop Pay, you are leaving conversions on the table. Shop Pay stores customer information (email, address, payment) from previous purchases across any Shopify store. Returning Shop Pay customers can complete checkout in 2-3 taps without re-entering any information.
Shopify's data shows Shop Pay converts 36% better than guest checkout. The mechanism is straightforward: eliminating data entry eliminates the primary source of checkout friction.
Ensure Shop Pay is enabled: Settings > Payments > Accelerated checkouts. Make sure Shop Pay is turned on.
Promote it earlier in the purchase journey: Add Shop Pay buttons to product pages and cart. Customers who know Shop Pay is available are more likely to select it at checkout.
One-click from product page: For single-product purchases, the Shop Pay button on the product page bypasses the cart entirely and goes directly to a pre-filled checkout for returning users. This is particularly effective for repeat purchases and impulse buys.
Mobile Checkout Optimization
Over 60% of Shopify checkouts begin on mobile. The one-page checkout performs better on mobile than the three-page version, but mobile-specific optimizations still matter.
Mobile-specific considerations:
Tap target size: Ensure all interactive elements — fields, buttons, dropdown menus — are large enough to tap without zooming. The minimum recommended tap target size is 44x44 pixels.
Keyboard type matching: Phone number fields should trigger a numeric keyboard. Email fields should trigger a keyboard with easy access to @ and .com. Shopify's native fields handle this correctly, but custom fields may not.
Collapsible order summary: On mobile, the order summary is collapsed by default (customers tap to expand). Make sure your product images are clear and your pricing breakdown is easy to read in this compressed view.
Autofill compatibility: Modern mobile browsers can autofill address and card data from saved credentials. Ensure your checkout does not break autofill — non-standard field names or JavaScript that interferes with autofill forces manual entry.
Loading speed: Each second of checkout load time increases abandonment. Avoid adding too many checkout apps that inject third-party scripts, which add load time. Check your checkout page speed in PageSpeed Insights.
Checkout Upsells and Offer Extensions
The one-page checkout supports upsells and offers through Checkout UI Extensions. This allows compatible apps to display offers within the checkout layout rather than on a separate page.
Types of checkout offers:
- Product upsells (add a complementary item before completing purchase)
- Bump offers (add-ons displayed as a checkbox next to a product)
- Loyalty points display (show customers how many points they will earn)
- Gift messaging (let customers add a gift note)
- Charitable giving (round up or add a donation)
Post-purchase upsells on the thank-you page remain the highest-converting upsell placement because:
- The customer has already entered payment information
- They have completed a transaction and their purchase confidence is high
- Accepting an offer is frictionless (their card is already on file)
- A one-click "Add to order" or "Complete purchase" mechanism eliminates re-entry
Apps like ReConvert specialize in thank-you page optimization and post-purchase upsell sequences.
Discount Code Placement
The discount code field in checkout creates an interesting problem. Customers who do not have a code but see the field may leave checkout to search for one — and not come back. This is called the "discount code field abandonment" phenomenon.
Options:
- Keep the field but make it less prominent (default link text "Add discount code" rather than a visible empty input)
- Use checkout apps that apply discounts automatically based on cart contents or customer tags
- Embed discounts in links rather than codes (Shopify supports discount links that pre-apply a discount when clicked)
If most of your customers never use discount codes, the field exists to serve a small minority while creating friction for the majority. Consider whether it belongs in your checkout layout.
Measuring Checkout Performance
Track these metrics monthly:
- Checkout abandonment rate: (Reached checkout - Completed orders) / Reached checkout
- Payment step abandonment: How many customers get to the payment section but do not complete
- Mobile vs. desktop conversion gap: If mobile converts significantly worse than desktop, there is a mobile-specific problem
- Shop Pay adoption rate: What percentage of eligible customers use Shop Pay
Shopify Analytics provides all of these under Reports > Sales > Checkout funnel. A healthy checkout abandonment rate for an optimized Shopify store is 60-65%. Industry average is around 70%. If you are above 75%, checkout optimization should be your primary focus.