Black Friday upsells: what to change before the holiday rush

September 18, 2026 · 2 min read

Between late November and Christmas, many stores make a large share of their year. Every offer is shown more often, so a good one earns more than in any other month, and a broken one costs more. The work is mostly done before the rush, not during it.

In October: check that everything still works

• Place a full test order for each offer, on a phone and paying by card, and make sure the offer appears.
• Check the stock of every offered product. An offer for something that sells out on Black Friday morning is a disappointment by the afternoon.
• Look at how your app bills you. If it charges by order volume or by a share of upsell revenue, your biggest month is also its most expensive. Work out the November bill now rather than discover it in December.

For the sale: rethink the discount, not only the product

During a store-wide sale, customers already have a discount on everything. An upsell at 10% off looks weak next to a 30% banner, and stacking one discount on another can eat your margin. Two better options:

• Offer something that isn’t in the sale — a gift box, a care kit, an accessory — with a modest discount of its own.
• Use the moment for a product that completes the gift: wrapping, a card, a second small item for someone else.

Think about gifts

In December, many orders are gifts. The best offer is often not for the buyer but for the person receiving it: wrapping, a card, a matching smaller item. And customers buying for several people are open to “one more for someone else”.

Shipping deadlines change the offer

Close to Christmas, an offer is only worth accepting if it arrives in time. If an item ships from another warehouse or supplier, or takes longer to prepare, take it out of your offers in the last week rather than create a late parcel.

What to leave alone

• Don’t install a new app or launch a brand-new offer on Black Friday itself. If something breaks, you will find out with the highest traffic of your year.
• Don’t start an A/B test during the rush and apply its winner in January. Holiday shoppers don’t behave like January shoppers.
• Don’t add urgency you don’t mean. A real sale already has a real deadline.

Expect some post-purchase offers not to show

Shopify notes that under extreme platform load the post-purchase page may not appear, and wallet payments such as Apple Pay never show it. On the busiest days, keep a cart-page offer as well, so you don’t depend on a single moment.

With FlatUpsell

FlatUpsell costs the same in your biggest month as in your quietest: one flat price, however many orders you ship in November. You can switch offers on and off in one click as stock and deadlines change, and compare the season with the previous period in the dashboard.