Most Black Friday problems are caused by things that could have been fixed in October. A broken discount code, a product page that loads in 6 seconds on mobile, an email sequence that fires on the wrong trigger - these are all preventable with preparation time. The mistake is starting too late.
Start Black Friday preparation at least six weeks before the sale. This checklist works backwards from the day.
Six weeks out: performance and technical foundation
Run a Lighthouse speed test. Open your homepage and your best-selling product page in PageSpeed Insights. If your mobile score is below 70, you have six weeks to improve it. A store scoring 45 on Black Friday is losing a meaningful percentage of mobile visitors before they see a single product. Prioritise image optimisation, app bloat reduction, and removing unused scripts.
Audit your app stack. Every app you don't actively use is loading JavaScript that slows your store. Remove inactive apps. If you installed something in January to test it and never activated it, it's probably still injecting a script. Check Settings → Apps and remove anything you don't need.
Check your hosting infrastructure. Shopify's infrastructure scales automatically during peak periods - this is one of its genuine advantages over self-hosted platforms. You don't need to worry about your server crashing under load. What you should verify is that any third-party services you rely on (email, reviews, chat) can handle your expected volume.
Four weeks out: offers, inventory, and discount codes
Finalise your offer structure. Decide exactly what you're offering: site-wide percentage, specific products, bundles, tiered discounts. The simpler the offer, the less that can go wrong. "20% off everything with code BLACKFRIDAY" is clear and easy to communicate. "20% off full-price items over £50 excluding sale items with code BF20" creates support tickets.
Create and test your discount codes. Create every discount code you plan to use and test each one in a live checkout with a real transaction. Check that the discount applies correctly, that it applies to the right products, and that the minimum order threshold (if any) works. Do this four weeks out, not the night before.
Review your inventory. Black Friday should not be the weekend you discover your bestselling product is out of stock. Audit stock levels across your catalogue. For products you expect high demand on, order or produce inventory now - lead times don't compress because you've forgotten.
Prepare your product page content. Update your top-selling product pages for Black Friday context: urgency signals (low stock indicators if accurate), updated review counts if your reviews have grown, and any new photography. Don't change copy wholesale - change what's relevant to the sale period.
Two weeks out: marketing setup and email
Set up your email flows for Black Friday. Your abandoned cart sequence, welcome series, and post-purchase flows should all have Black Friday-aware versions - or be paused and replaced with campaign-specific flows during the sale period. A generic abandoned cart email sent during Black Friday weekend is less effective than one that references the sale.
Build your email campaign sequence. A standard Black Friday email sequence:
- Early access email to your VIP segment (Wednesday before)
- Black Friday launch email to your full list (Black Friday morning)
- Reminder email to non-openers (Black Friday afternoon)
- Cyber Monday extension email (Monday morning)
- Last chance email (Monday evening or Tuesday morning)
Schedule social media posts. Prepare and schedule your Black Friday social content in advance. Don't be writing Instagram captions at 7am on Black Friday morning.
Configure Launchpad if you're on Shopify Plus. Launchpad lets you schedule price changes, theme changes, and product launches to go live at a specific time. Use it to set your Black Friday prices to activate automatically at midnight rather than manually changing them in the middle of the night.
One week out: testing and final checks
Full end-to-end test. Place a test order using every discount code you plan to run. Check the checkout from start to finish. Confirm the order confirmation email sends correctly and includes the right information. Do this on both desktop and mobile.
Test your email flows. Trigger your abandoned cart, welcome, and post-purchase flows deliberately and check that they send correctly and contain accurate content. A Black Friday abandoned cart email that mentions a 20% discount when you're actually running 30% is a problem.
Check your returns and shipping policies are visible. Black Friday shoppers are buying gifts. They want to know about returns before they purchase. Make sure your returns policy is linked from product pages and visible in your checkout.
Brief your customer service team. If you have anyone handling customer enquiries, make sure they know the exact offer details, discount codes, and returns policy before the sale starts. Support tickets answered incorrectly are almost worse than no answer.
The week of: monitoring and responding
Monitor Shopify admin in real time. Watch the live view during peak hours. Look for order volume, traffic sources, and any errors in the orders feed.
Watch for abandoned checkouts. In Shopify admin, you can see abandoned checkouts in real time. If you see a spike in abandonment at a specific step, something may have broken. Check the checkout yourself immediately.
Have a rollback plan. If a discount code isn't working, if prices are wrong, or if something breaks in your checkout, know exactly what to do: who to contact (your developer), how to revert changes (Shopify theme version history), and how to communicate delays to customers.
The stores that have their best Black Friday years are the ones that treated preparation as a six-week project, not a last-minute scramble. Most of the wins are in the fundamentals - fast pages, working discount codes, and emails that send correctly - not in creative offers or complicated mechanics.
