Black Friday store check: what to do before 27 November

Black Friday 2026 is on Friday 27 November. Last year, at 12:01pm Eastern on Black Friday, Shopify merchants were taking $5.1 million a minute between them. That's the busiest stretch of the year, and the worst possible time to find out your checkout is broken.

A lot of Black Friday prep goes into the offer: the discount, the emails, the ads. It's worth asking a second question too. When the traffic arrives, will the store hold up?

You don't need a redesign before Black Friday. You need three checks, in this order: speed and mobile checkout first, then a safe way to make changes, then a real purchase from your own store with tracking confirmed.

1. Speed and mobile checkout first

Black Friday visitors are often strangers on their phones, clicking through from an ad or an email. So start with how fast the store feels on a phone, not on your laptop.

Shopify measures this for you, using real visits rather than a lab test. Go to Online Store → Themes for the performance summary, or open the web performance reports under Analytics → Reports. Filter to mobile. You'll see three numbers, each rated good, moderate or poor:

• Loading (LCP): how long the main content takes to appear. Google's "good" line is 2.5 seconds or less.
• Interactivity (INP): how quickly the page reacts to a tap. Good is 200 ms or less.
• Visual stability (CLS): how much the page jumps around while loading. Good is 0.1 or less.

The report also marks when apps were installed and themes were changed, so you can see what made things worse.

If a number is poor, common causes are oversized images in the first screen, apps loading scripts on every page, a video hero and stacked popups. Fix those first. Be careful with "one-click" speed apps: Shopify's own performance team looked at extensions that promised one-click optimisation and found that almost 15% of them were gaming the test tools rather than making the store faster for shoppers. Judge any speed fix by the web performance report, not a test score. For more on each cause, see why your store is still slow.

Then look at checkout on your phone. Go to Settings → Payments and check which express options are switched on. Shop Pay alone was used for 32% of Shopify's Black Friday Cyber Monday orders last year, according to Shopify. Every payment option a customer expects and can't find is a reason to leave.

2. Test every change on a duplicate theme

Any change you make to the live theme is live for every shopper at once. The safer way is to make changes on a copy, check them, then publish.

Work on a copy

In Online Store, use the ⋯ menu next to your live theme to duplicate it. Make your edits on the copy and preview it before publishing. You can share a preview of an unpublished theme from the preview bar; Shopify notes that visitor preview links expire after 2 days, so send a fresh one when you need a second opinion.

Keep one extra copy of your current live theme that you don't touch. If something goes wrong later, you have a known good version to publish again.

Clear out what you don't need

Go through the store with one question: if this broke on Black Friday, would we notice in time? Then remove or fix:

• Apps you don't use. Uninstall them, and check the theme for leftover code. Every app script is something that can slow the store down or fail.
• Half-finished experiments. A test section, a new filter, an upsell widget you never finished setting up.
• Popups that stack. A newsletter popup, a cookie banner and a spin-to-win wheel on top of each other cover your product on a phone.
• Anything that only works on desktop. Mega menus and hover effects that do nothing on a phone.

Decide when to stop changing code

How close to Black Friday you keep changing the theme and installing apps is your call. Whatever you choose, leave yourself enough time to test each change and fix anything it breaks before the traffic arrives. A few options:

• Pick a cut-off date after which you only change content (products, prices, discount codes, banners, collections) and leave theme code and apps alone.
• Keep changing, but only through the duplicate, and publish each change after a test purchase on your phone.
• Hold bigger changes until after Cyber Monday, and use the time before Black Friday for content and testing.

Whichever you pick, set up your Black Friday discounts early and test each one at checkout. A code that doesn't apply on the day costs you the sale and the customer's trust.

3. Test a full purchase on your phone, then test your tracking

This is the check that's easiest to skip because it feels obvious. Do it anyway.

Buy something for real

Pick up your phone, open your store from a search or an ad link the way a customer would, and buy a product all the way through, with your own card. Then refund it.

Why a real order? Shopify's test mode for Shopify Payments isn't meant for a store that's live: while it's on, real customers can't pay with real cards. And manual methods like cash on delivery or bank transfer can't be simulated at all. A real order, refunded, tests what your customers will see.

While you buy, watch for:

• Shipping costs or delivery times that appear for the first time at checkout
• A discount code that doesn't apply, or applies twice
• A popup or chat bubble covering the Add to cart button
• The order confirmation email: does it arrive, and does it look right on a phone?

If shoppers add to cart and then drop off, our guide to add to cart but no sales covers what to look at in checkout.

Then check the sale was tracked

A sale your ad platforms can't see is a sale they can't learn from. And this year there's a specific reason to check.

Shopify upgraded the Thank you and Order status pages on stores that hadn't done it themselves: 26 August 2026 was the deadline for stores not on Plus. After the upgrade, the old Additional scripts box in checkout settings is view-only, so tracking code that used to live there may have stopped firing.

Here's how to check:

1. Go to Settings → Customer events. Each pixel should show Connected in the status column.
2. For a custom pixel, select it and click Test. That opens your store with the Shopify Pixel Helper, which shows each event as it fires.
3. Place your real test order and confirm the purchase shows up in Shopify, in your ad platforms and in your analytics tool, with the right value.

If the purchase appears in Shopify but nowhere else, fix that before you spend a dollar on Black Friday ads. Our guide to checking purchase tracking after 26 August walks through the test for GA4 and Meta, and how to fix what stopped.

One more thing to know when you read the results. Shopify notes in the admin that sessions are calculated differently from 21 September 2026. So if you compare this Black Friday's sessions or conversion rate with last year's, you're not comparing like with like. Compare orders and sales instead. Our guide to bot traffic and your conversion rate explains the sessions change.

What to do next

1. Check the mobile web performance report and fix anything rated poor.
2. Check your express payment options and buy from your store on your phone, then refund the order.
3. Duplicate your live theme, keep one untouched copy, and make changes only on the duplicate.
4. Remove unused apps, half-finished features and stacked popups, and choose when you'll stop changing code.
5. Set up and test every discount code, confirm your pixels show Connected and check a test purchase is tracked.

If you'd like a second pair of eyes before Black Friday, send us your store link and we'll tell you the first thing we'd fix.