The checkout is the most expensive piece of UI in your store. Every percent of conversion lifted shows up directly in revenue, with no acquisition cost attached. We treat it as a product of its own.
After eleven years of pushing checkout conversion higher on stores ranging from $200K/yr to $40M/yr, here's the playbook in the order we'd actually apply it.
Tier 1: the baseline (do these before anything else)
If your checkout is missing any of these, fix them this week. They're table stakes.
1. Mobile-first one-page or accordion
Multi-step checkouts where each "step" is a separate page reload are dead. Move to:
- A single scrollable page (Shopify Plus default), or
- An accordion where steps expand inline
Either is fine. The point is: fewer page loads, less perceived friction.
2. Apple Pay and Google Pay above the fold
For mobile users (which is 60–75% of your traffic), express checkout is the conversion multiplier that requires almost no thought:
- Apple Pay / Google Pay buttons at the top of checkout, not buried below address fields
- One-tap checkout means they're done before they've thought about whether to bail
On Shopify Plus this is literally a checkout extension config. On Woo, the Stripe plugin handles it.
3. Guest checkout, always
Make account creation post-purchase, never a blocker. Forcing signup before payment is one of the highest-impact conversion killers we still see in the wild.
If you want emails for marketing: capture them at order confirmation with a "Save this for next time?" toggle.
Tier 2: the high-leverage changes (do these in month one)
4. Trust signals near the pay button
Three small icons or text labels right next to "Place Order":
- Free returns (or your return policy in 5 words)
- Secure checkout (a tiny lock + "SSL encrypted")
- Shipping window ("ships in 1–2 days")
Each one peels off a category of last-second doubt.
5. Autocomplete on every address field
Google Places integration on the address-line-1 field saves the user 4–6 fields of typing. On mobile this is the single biggest improvement we usually make.
6. Real-time form validation
The user shouldn't submit and then see "Invalid postal code." Validate inline as they type. Show green checks for valid fields. Use red borders + a one-line message for invalid ones.
This sounds obvious. Half the checkouts we audit don't do it.
Tier 3: the recurring revenue stuff (do these in quarter one)
7. Post-purchase upsell
After the order is placed, before the thank-you page, show one offer:
- "Add a refill at 20% off, one click"
- "Add the matching X, only $Y today"
ReCharge, Bold Upsell, Aftersell. Pick one. The math works: ~5–12% take rate on a 30-day average AOV lift.
8. Subscription opt-in, not subscription default
Default the customer to one-time purchase. Offer subscription as an opt-in with a clear discount.
Yes, you'll have a lower initial subscription rate. You'll also have a much lower refund rate, lower customer support load, and higher LTV from the customers who actually opt in. Better cohort, every time.
The brands that default to subscription and burn customer service hours on "I didn't realize I was on a subscription" are not playing the long game.
Tier 4: the polish (do these whenever)
9. Cart drawer over cart page
A slide-out cart drawer that previews the items + lets them go directly to checkout, without a full cart-page route in between, removes one click and one page load.
10. Recovery flows
- Abandoned cart emails: 3-message sequence, first within 1 hour, second at 24h, third at 72h with an incentive
- SMS abandoned cart recovery (Klaviyo + a phone number capture in checkout). Recovers a meaningful slice of mobile abandons
- Inactive customer winback flows monthly
What we DON'T recommend optimizing first
A few things that get a lot of attention but rarely move the needle on most stores:
- Color/style A/B tests on the buy button. Usually noise. Spend the time on Tier 1.
- Removing the discount code field. Small studies show 1–2% lift, but it's annoying for the customers who do have codes. We leave it.
- Live chat in checkout. Distracting. Add it to PDP if you must, not at checkout.
How to know it's working
Three metrics, in this order:
- Mobile checkout completion rate. Should be 50%+ (start to finish). Below that = Tier 1 problems
- Average order value. Tier 3 work moves this 5–15% over a quarter
- Net revenue retention. Subscription opt-in rate × subscription churn × revenue per cohort
If you want a free checkout audit with a written report and a prioritized fix list, get in touch. Usually a 5-day turnaround.