Checkout Abandonment Rate: How to Calculate and Read It

Checkout abandonment rate tells you how many shoppers who opened your checkout left without paying. It sounds like one clean number, but it depends on where you start counting, which tool counts it, and whether declined payments are hiding inside it. Here's the formula, how to measure it in GA4 and Shopify, how to read it step by step, and what the benchmarks actually measure.

What is checkout abandonment rate?

Checkout abandonment rate is the share of shoppers who start checkout and don't complete the purchase. It's often confused with cart abandonment, which starts one step earlier: at add to cart. The two rates use different denominators, so they never match.

Checkout conversion rate is the mirror image: purchases divided by checkouts started. Shopify uses exactly that definition for its checkout conversion rate.6Shopify Dev Docs, ShopifyQL sessions schema Store conversion rate is different again: purchases divided by all sessions.

Checkout abandonment rate formula

A worked example. In September, a store records 4,000 users who added to cart, 2,400 who started checkout and 900 who purchased.

Same store, same month, two abandonment rates 15 points apart. That's why a benchmark is useless until you know which one it measures.

Three rules keep the number honest:

• Same unit on both sides. Users with users, sessions with sessions. Mixing them inflates or deflates the rate.
• Deduplicated purchases. Google's event reference says the transaction_id parameter helps you avoid duplicate purchase events, for example when a customer reloads the confirmation page.4Google for Developers, GA4 recommended events reference
• A window that fits your checkout. A shopper can leave and come back. Stripe Checkout sessions expire 24 hours after creation by default, and you can shorten that to 30 minutes minimum.9Stripe Docs, Recover abandoned carts Count a checkout as abandoned only once its window has closed.

How to measure checkout abandonment in GA4

GA4 builds the checkout funnel from four recommended ecommerce events. Google defines begin_checkout as the event that "signifies that a user has begun a checkout", add_shipping_info and add_payment_info as the user submitting shipping and payment information, and purchase as one or more items being purchased.4Google for Developers, GA4 recommended events reference

The Checkout journey report turns those events into a funnel. Google describes it as showing "the number and percentage of users who began checkout" and completed each next step, with an abandonment rate shown under each bar that has a next step.2Google Analytics Help, [GA4] Checkout journey report You'll find it under the Monetization topic of the Life cycle collection.

For the event setup itself, see our guide to GA4 ecommerce events. Google's implementation guide documents the parameters each event takes.3Google for Developers, Measure ecommerce (GA4)

How to measure checkout abandonment in Shopify

Shopify gives you three different views, and they don't count the same thing.

The definitions matter. Shopify counts a session as "reached checkout" only when there was user input during checkout, "for example, a key press or mouse click".5Shopify Help Center, Behaviour reports (Conversion rate breakdown) A visitor who opens checkout and leaves without touching anything isn't in the denominator. GA4's begin_checkout usually fires when checkout loads, so the same store tends to show a lower checkout abandonment rate in Shopify than in GA4.

The Abandoned checkouts list is a recovery tool, not a measurement. It only holds checkouts where an email was entered and that stayed incomplete for more than ten minutes, and it drops anything older than three months.7Shopify Help Center, Abandoned checkouts Count those rows and you undercount abandonment.

Break the rate down by checkout step

A single rate tells you that buyers leave. The step-by-step drop tells you where. Here's the same September example, split by GA4 step.

Each drop has its own usual suspects.

Google's own example reads the funnel the same way: a big drop between shipping and payment may point to shipping costs or a forced login.2Google Analytics Help, [GA4] Checkout journey report Then segment each step by device, country, traffic source and new versus returning customer. A step that only breaks on mobile in one country is a different fix from one that breaks everywhere.

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The payment step: declines look like abandonment

The last step is the one analytics reads worst. Once the shopper submits payment, three very different things can stop the purchase event:

• The payment was declined and the shopper gave up.
• Authentication failed or was abandoned: the bank asked for 3D Secure and the shopper didn't complete it.
• The payment went through but the purchase event didn't fire: a redirect, an ad blocker, a consent banner.

In your analytics, all three look like a shopper who walked away. They're not: the first two wanted to pay, and the third did pay. Among US online shoppers who abandoned for a reason other than "just browsing", Baymard's survey has 10% citing "the credit card was declined" and 17% "website had errors / crashed".1Baymard Institute, Cart abandonment rate statistics (last updated September 22, 2025)

Your processor's records tell them apart. At Stripe, a payment that needs 3D Secure sits in requires_action; when an attempt fails, for example on a decline, the PaymentIntent returns to requires_payment_method so the payment can be retried.8Stripe Docs, How Payment Intents and Setup Intents work A payment that stays there after a decline looks, by status alone, like one that never got a card. Read the attempts, not only the final status.

The payment failure group belongs in your payment acceptance rate, which covers how to classify soft and hard declines and how to retry without making things worse. Lowering it is a payments project, not a checkout design project.

Checkout abandonment rate benchmarks

The figure everyone quotes comes from Baymard Institute. Its page, last updated on September 22, 2025, reports "the average cart abandonment rate of 70.22%", calculated from 50 studies containing statistics on ecommerce shopping cart abandonment.1Baymard Institute, Cart abandonment rate statistics (last updated September 22, 2025)

Before using it, read the method:

• It's cart abandonment. The page is titled "Cart & Checkout", but the average is built from cart abandonment studies, and the page doesn't say whether each study counted from add to cart or from checkout. A checkout abandonment rate starts later in the funnel, so it should come in lower.
• It's an average of other people's numbers. The 50 studies come from vendors and research firms, with their own methods, over nearly 20 years. Baymard itself notes large fluctuations between studies.
• It mixes every vertical, device and market. Your store has one mix.

Baymard also publishes why shoppers leave. In its survey of US online shoppers, 42% abandoned a cart because they were "just browsing / not ready to buy". Excluding them, the top reasons were:1Baymard Institute, Cart abandonment rate statistics (last updated September 22, 2025)

Figures from vendor blogs that quote checkout abandonment by industry or device rarely name their sample. If you use one, say who published it, when, and what it counted.

What is a good checkout abandonment rate?

No card network, analytics vendor or regulator publishes an official target. A good rate is one that falls against your own history, for the same segment and the same definition. Context moves the number more than checkout quality does:

How to lower your checkout abandonment rate

Fix what the step breakdown points at, in this order:

1. Payment step losses: separate declines from exits first. Declines are handled in payment acceptance rate; missing methods in alternative payment methods and local payment methods; returning buyers in saved payment methods.
2. Costs revealed late: show shipping, tax and fees before checkout. Baymard's top reason, by far.
3. Account walls and long forms: see checkout as guest and one-page checkout.
4. Shoppers who simply left: recovery emails and reminders, covered in how to reduce cart abandonment. Shopify can only email shoppers who entered an email address,7Shopify Help Center, Abandoned checkouts and Stripe treats recovery emails as promotional: the customer must have agreed to receive them.9Stripe Docs, Recover abandoned carts

The full, ranked list of checkout fixes is in our ecommerce checkout optimization guide, and the steps behind them in checkout flow.

Where Tagada fits

Whatever your stack, the method holds: one written definition, a step-by-step funnel, and processor logs joined to the payment step before you call anything abandonment.