Shopify Checkout Not Working? Causes, Fixes & Diagnostic Guide

Shopify checkouts fail for a short list of reasons: no shipping rate matches the customer's address, the payment is declined or the gateway is misconfigured, an app is interfering with checkout, or a tax or inventory setting is blocking the order. Less often it's the customer's own browser, or a Plus checkout extension that broke after an update.

Match your symptom first. It tells you which section to read.

These two cover most broken checkouts. Check them before you touch anything else.

No shipping rates at checkout

Shopify only shows rates that match the customer's country, region, order weight and order value. If nothing matches, the customer is stuck at the shipping step with no way forward. Common reasons:

• No shipping zone exists for that country
• The order weight is above your highest weight-based rate
• The order total falls outside your price-based brackets
• A third-party shipping app is failing to return rates
• Carrier-calculated rates are misconfigured, or the carrier account's credentials have expired

Fix: Go to Settings → Shipping and delivery. Make sure every country you sell to has a zone with at least one rate that covers your heaviest and most expensive orders. A fallback flat rate stops anyone getting stuck while you fix the real logic. If rates still fail, our Shopify shipping not working guide goes deeper.

Payment declined or gateway errors

The customer enters card details and gets an error. Possible causes:

• Your payment provider is having an outage
• Your Shopify Payments account is flagged for review
• The card is declined for fraud, insufficient funds or a failed 3D Secure check
• The payment method isn't available in the customer's country
• A currency mismatch between checkout and the payment provider

Fix: Check status.shopify.com and your provider's status page first. Then open Settings → Payments to confirm your provider is active, and check Finances → Payouts for holds if you use Shopify Payments. If one customer's card fails and everyone else's goes through, the problem is their card, not your store.

"This store can't accept payments right now"

This message means the store can't take payments at all. The usual reasons are a store still on a trial or paused plan, no active payment provider, or a Shopify Payments account on hold while Shopify verifies your identity. Check Settings → Plan and Settings → Payments, and see Shopify Payments not working if the account itself is the problem.

If shipping and payments check out, look at what sits between the cart and the order: apps, tax and stock.

An app is interfering with checkout

Some apps run inside checkout through extensions, Shopify Functions or pixels. When one misfires, it can break checkout outright. The usual suspects:

• Tax apps
• Subscription apps
• Currency converter apps
• Address autocomplete or validation apps
• Upsell apps that hook into checkout

Fix: If checkout broke recently, start with the app you installed or updated last. Disable non-essential checkout apps one at a time and re-test after each. Shopify apps not working covers app conflicts in more depth.

Tax configuration errors

Tax setup in Shopify is unforgiving. The common breaks are a missing registration where you have nexus, a tax-inclusive setting that doesn't match your accounting, a tax app overriding Shopify's defaults, or digital products set up wrong for VAT regions.

Fix: Go to Settings → Taxes and duties and confirm a registration exists for every region where you collect. If you use a tax app, check its dashboard for errors. Shopify tax calculating wrong walks through the rest.

Inventory or location settings

The order can't complete when the product is out of stock with continue selling turned off, isn't stocked at a location that ships to the customer, or when a multi-location inventory app misreports availability. Pre-order logic set up wrong does the same.

Fix: Open the product and check its inventory, the locations it's stocked at, and the Continue selling when out of stock setting.

Checkout fails only on mobile

Standard Shopify checkout is solid on mobile. If only mobile fails, look at Shop Pay, Apple Pay and Google Pay in Settings → Payments first, then test in a private mobile window. Express checkout not showing covers the wallet buttons specifically.

The problem is on the customer's side

Sometimes it isn't your store at all. Ad blockers, privacy browsers, a VPN flagged as a fraud risk, an old browser extension or a weak connection can all stop a checkout. If only a handful of customers report it and you can't reproduce it in a clean browser, this is probably your answer, and it isn't something you need to pay anyone to fix.

A Plus checkout extension broke

On Shopify Plus, custom checkout UI extensions and Shopify Functions can break after a platform update. Symptoms include partial page loads, missing fields and generic errors that never show up in the admin. Fixing them means a developer updating the extension.

Run this sequence before you rebuild anything. It separates payment, shipping, tax, inventory and app problems quickly.

1. Check abandoned checkouts. Open Orders → Abandoned checkouts and look for the step where customers drop off and whether the same error repeats.
2. Reproduce with a real test order. Use the customer's country, address, products, discount code, device and payment method. Shopify Payments has a test mode under Settings → Payments → Shopify Payments → Manage.
3. Check shipping rates for that shipping profile and destination.
4. Check payment events in the order timeline for decline and gateway messages.
5. Isolate apps. Review recent installs and checkout changes, including Plus extensions.
6. Check Shopify status. If many stores report the same issue, it's an incident, not your setup.

Then look for a pattern in customer reports. Same country points to shipping or payment setup for that region. Same payment method points to that gateway. Same browser or device points to the front end. Same time of day points to an incident.

What DIY checks usually miss

• A carrier rate API failing silently, so the store shows "no shipping available" instead of the real error
• A Shopify Payments account on hold with no clear message to the customer
• 3D Secure failures that look like card declines
• Stock allocated to a location that doesn't ship to the customer's region
• A market with no payment method available
• One customer account with a malformed saved address
• A checkout extension throwing an error only visible in the browser console
• Discount combinations hitting a limit and rejecting the order

These need someone who can read browser console logs and API responses, not another settings check.

Realistic ranges for checkout work:

• Quick diagnostic and fix (2–8 hours): $200–$1,200 for a single cause like a shipping zone, a gateway setting or one app conflict.
• Full checkout audit and remediation (10–25 hours): $1,000–$3,500 for cross-app conflicts, shipping logic, tax setup and multiple regions.
• Shopify Plus checkout extension work: $2,500–$15,000+ for custom UI extensions, Functions, B2B checkout or subscription integration.
• Custom checkout build on Plus: $10,000–$50,000+ for bespoke payment logic, multi-step flows or B2B portals.

If someone quotes $100 to fix your checkout without reproducing the issue first, they're guessing. Our Shopify expert cost guide has rates by service type.

Bring in a specialist if:

• Customers report checkout errors you can't reproduce
• Shipping rates work for some customers but not others, with no clear pattern
• You're on Shopify Plus with checkout extensions that need updating
• You're integrating a third-party payment gateway with custom logic
• Your tax setup is complex: multi-state, multi-country or B2B
• You suspect an app is breaking checkout but can't isolate which one

A good checkout expert reproduces the issue before guessing, reads console errors and network requests, tests fixes off the live store, and documents what they changed.

What you shouldn't pay for

Shop Pay, Apple Pay, Google Pay and PayPal are toggles in Settings → Payments. Checkout branding is in the checkout and accounts editor on every plan. Paying someone to switch those on is paying for five minutes of clicking.

Real checkout work is payment configuration, shipping logic, app conflicts and, on Plus, custom extensions. Only Plus stores can use apps that customize the information, shipping and payment steps; other plans can add app blocks to the thank you and order status pages.

Browse Shopify checkout experts for checkout and Plus work, or Shopify troubleshooting experts for diagnosing a broken checkout. Not sure which you need? Get matched with the right expert. Before you hire, read Shopify expert red flags.

• Shopify Payments not working
• Shopify shipping not working
• Shopify discount code not working
• Shopify checkout setup