Black Friday 2026: how to prepare your e-commerce (checklist to avoid losing sales)
Black Friday is won in September, not November: infrastructure and caching, mobile speed, checkout, stock, campaigns and email lists. The operational checklist, week by week.
The window that matters is now
During Black Friday week traffic can multiply by five and cost per click rises everywhere. Arriving unprepared means paying twice: more expensive media and a site that cannot cope. Everything that makes the difference — performance, checkout, lists, stock — must be fixed by the end of October.
1. Technical resilience
- Stress test at five times last year's peak, on listing, product page, cart and checkout — not just the homepage.
- Caching and CDN: full page cache active on campaign pages too, selective purge, images in AVIF/WebP served from the edge.
- Mobile Core Web Vitals: LCP under 2.5 seconds on campaign landing pages. Every extra second is conversion lost at the worst moment.
- Monitoring and alerts on response times, 5xx errors and order queues, with an on-call rota for the weekend.
2. Checkout and payments
This is the most expensive bottleneck. Check guest checkout, payment methods (cards, wallets, buy now pay later), shipping cost shown early, discount code handling and understandable error messages. Place a real end-to-end order on mobile, with and without an account, and one with a discount applied.
3. Stock, prices and promo rules
Decide in advance: which SKUs go on promotion, at which minimum margin, and which stock threshold triggers an automatic stop. Price rules should be loaded and tested in staging with scheduled dates, not applied by hand on Thursday night. Remember the obligation to show the lowest price applied in the previous 30 days (Omnibus directive).
4. Demand: build it first
- Email and SMS lists: lead capture campaigns from October with an "early access" incentive. The audience that converts in November is collected now.
- Remarketing audiences: 30/90-day visitors, abandoned carts, existing customers — populated and verified before costs peak.
- Campaign pages published early, so Google indexes them and you can use them as ad destinations.
- Email sequence: teaser, opening, mid-period, final hours, extension. Written and scheduled by early November.
5. Code freeze and contingency plan
One week before: stop non-critical deployments. Put in writing who does what if the site slows down, a product sells out or a payment method stops working. A two-page document prevents hours of chaos.
Short timeline
- September: performance and checkout audit, technical fixes, start list building.
- October: stress tests, promo rules in staging, campaign pages live, audiences ready.
- Early November: creatives and sequences scheduled, test orders, code freeze.
- BF week: execution, monitoring and budget adjustment only.
To know where you stand today, start with a free e-commerce audit: performance, checkout and campaigns analysed together.
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The questions clients ask us before we start
5 straight answers — costs, timelines, risks — from real projects.
When should I start preparing for Black Friday?
September for technical work (performance, checkout, stress tests) and October for promotions, campaign pages and list building. November is execution only: freeze risky changes a week before.
How much traffic should the site handle?
As a prudent rule, test at five times last year's peak, including product page, cart and checkout. The bottleneck is rarely the homepage.
Which fixes give the fastest results?
Mobile speed on landing pages, removing checkout friction (guest checkout, wallets, clear shipping) and building email lists early: the best impact-to-effort ratio of the three.
Do I have to show the previous price on discounts?
Yes. EU rules (the Omnibus directive) require showing the lowest price applied in the previous 30 days when announcing a reduction. Check that your product template displays it correctly.
Should I raise ad budgets during Black Friday?
Yes, but on warm audiences. Costs rise for everyone: whoever built lists and remarketing audiences in October pays less for the same conversion than someone starting from zero in November.
What if the site slows down during the peak?
Have a written plan: temporarily disable non-essential features, add resources, use a controlled waiting page and communicate with customers. Improvising during the weekend costs more than prevention.
