Upsell

An upsell is an offer that encourages a customer to spend more than they originally planned, usually by choosing a premium version, a larger quantity or a related add-on. It is closely related to cross-selling, which suggests complementary products. In practice, many ecommerce teams use "upsell" to cover both.

Where upsells appear

• On the product detail page: "frequently bought together" sections or quantity options.
• In the cart: suggestions or a progress bar towards a free-shipping threshold.
• At checkout: an add-on offered before payment.
• Post-purchase: a one-click offer shown after the order is placed, where the platform supports it.
• By email or SMS: follow-up offers for refills, accessories or upgrades.

Why it matters for paid ads

Upsells increase AOV, which spreads the cost of acquiring the order over more revenue. If you pay $25 in ads to win a sale, increasing that order from $40 to $55 changes the economics without lowering CPA.

Worked example (made-up numbers): 1,000 orders at a $40 AOV bring in $40,000. If 20% of customers accept a $15 add-on, revenue rises by $3,000 and AOV becomes $43.

Good practice

• Offer genuinely relevant items, not random products.
• Keep the upsell cheaper than the main item in most cases.
• Make declining easy and avoid pre-ticked boxes for extra paid items, which consumer rules in the EU and UK restrict.
• Track take rate and the effect on contribution margin, not just revenue.