How to get customers to buy more: raise the order value, bring them back sooner, and stay on the right side of the upsell rules

Customers buy more from you in three ways: they spend more per order, they buy more often, or they buy things from you they used to buy elsewhere. So getting existing customers to buy more comes down to a short list of moves: offer a better version at the moment of choice (the upsell), suggest the item that completes the purchase (the cross-sell), package items so the larger basket is the easier choice (bundles and thresholds), and prompt the next purchase when the customer is likely to need it (repeat purchase). Each works only when it helps the customer, and each has a few legal lines in the US, mainly around "free" offers, add-ons sold after checkout and subscriptions.

Start with the three numbers

Before you add any offer, measure where the gap is. Revenue from existing customers is the number of customers, times how often they buy, times what they spend per order.

• Average order value. Revenue divided by the number of orders, for the same period. If this is low against your costs of picking, packing or travel, work on bundles and thresholds.
• Purchase frequency. Orders divided by unique customers over a year. If customers buy once and vanish, work on repeat prompts and loyalty.
• Range share. How many of your categories a typical customer buys from. If most buy only one, work on cross-selling.

Track each with the count behind it, and compare only with your own past figures. Our page on customer lifetime value shows how the three combine into one figure worth tracking.

Upselling techniques that customers welcome

An upsell offers a better or larger version of what the customer already chose. It works when the step up is small, relevant and explained in terms of what the customer gets.

• Show the next tier at the point of choice. Put the standard and premium options side by side, with the one difference in plain words: "same jacket, waterproof seams". Three options often make the middle one the comfortable choice.
• Upgrade the service, not just the product. Faster delivery, installation, setup or an extended warranty often matter more to the buyer than a bigger size.
• Keep the gap modest. A step up that is a small share of the original price feels like a detail. A step that doubles the bill feels like a different purchase.
• Train the people who sell. In a shop, salon or trade business, the upsell is a question: "Would you like us to replace the washer while we are here?" Give staff two or three such questions per service, not a script.

Cross-selling that completes the purchase

A cross-sell suggests something that goes with the purchase. The best ones solve a problem the customer is about to have: the cable for the printer, the cleaner for the leather sofa, the case for the phone.

• Use your own order data. List which items are most often bought together, and show those pairs on product pages and in the cart.
• Limit the suggestions. One to three relevant items. A wall of recommendations reads as noise.
• Time it after the first value moment. For services, a cross-sell often lands best after the first job is done well, not in the first quote.

Bundles, thresholds and "free" offers

Bundles and free delivery thresholds raise order value because the larger basket becomes the simpler or cheaper-feeling choice. They are also where US rules are most specific. The FTC's Guide Concerning Use of the Word "Free" (16 CFR 251.1, read on 22 October 2026) says offers such as "Buy 1-Get 1 Free" and "2-for-1 Sale" "must be made with extreme care". Three points matter most:

• The item that must be bought should be sold at its regular price, meaning the price at which it was openly sold in that market for a reasonably substantial period, "i.e., a 30-day period". You may not recover the cost of the free item by marking up the item that must be bought.
• All conditions of a free offer should appear "clearly and conspicuously at the outset of the offer". A footnote reached by an asterisk does not count as disclosure at the outset.
• If no substantial sales were made at the regular price, a free offer "would not be proper", except for genuine introductory offers.

A free delivery threshold works best set just above your current average order value, so a typical customer needs one more small item to reach it. Keep the threshold stable, and say it in the cart. A line that states the exact amount still needed, for example "Add 6 dollars more for free delivery", is a clear, checkable promise. For pricing structures beyond bundles, see price strategy examples.

Online upsells after checkout and subscriptions

Two US federal rules apply directly to online selling, both in the Restore Online Shoppers' Confidence Act (15 USC 8402 and 8403, read on govinfo on 22 October 2026).

Post-checkout offers from another company. If a third party sells to your customer after checkout, it may charge them only after clearly disclosing what is offered, that it is not affiliated with you, and the cost, and only after getting the customer's full account number, name, address and contact details and an "additional affirmative action" such as a confirmation click. The merchant may not pass the customer's card or billing details to that third party. Your own one-click upsell on your own checkout is different, but the same clarity is good practice.

Subscriptions and auto-renewal. Turning a one-off buyer into a subscriber is a strong repeat purchase move. Section 8403 makes it unlawful to charge through a negative option feature online unless you disclose all material terms before taking billing information, get express informed consent before charging, and provide "simple mechanisms" to stop recurring charges. Some states, including California, add their own auto-renewal rules. Make cancelling as easy as subscribing, and send a reminder before renewal.

Repeat purchase, the move that compounds

• Remind at the right interval. If a bag of coffee lasts about three weeks, the reorder email goes at about three weeks. Base the timing on your own order gaps.
• Make reordering one step. Saved baskets, "buy again" links and stored preferences remove the effort that sends people elsewhere.
• Reward the second purchase. The jump from one order to two is where most customers are lost. A simple thank-you offer on the second order often does more than points on the tenth.
• Use the channels you own, with consent. Email and SMS flows carry most repeat revenue for online stores. Our page on B2C email flows covers the five automated flows and the consent rules, and loyalty card marketing covers stamp, points, tier and paid membership schemes.

Questions about getting customers to buy more

What is the difference between upselling and cross-selling?

Upselling offers a better or larger version of what the customer chose. Cross-selling offers a different item that goes with it. Both raise order value, and both work best when the suggestion solves a real need.

What is the quickest way to increase average order value?

For most online stores it is a well-placed bundle or a free delivery threshold set just above the current average, shown clearly in the cart. Test one change at a time so you know which one moved the number.

Can I advertise "buy one get one free"?

Yes, if the item that must be bought is at its regular price, the conditions are shown clearly with the offer itself, and you do not recover the cost by raising the price of the paid item. That is the FTC's guide in 16 CFR 251.1.

Is it legal to sign customers up for a subscription at checkout?

In the US it is, if you show all material terms before taking billing details, get express informed consent, and give a simple way to stop the charges, as 15 USC 8403 requires. Check your state's auto-renewal law as well.

When can we judge whether these changes are working?

Compare average order value, purchase frequency and the share of customers who place a second order with the same period before the change, using the counts behind each figure. The size of the effect depends on your product, your prices and how often it is naturally bought.

When the buyer asks an assistant what to buy with it

Cross-selling now happens outside your store too. A shopper asks ChatGPT "what should I buy with a new espresso machine?" and the answer names grinders, scales and brands, drawn from the reviews and product pages the assistant has read. Whether your products appear in those suggestions is a different question from your cart conversion rate.

That question has its own category of tools. AI Knows Us asks shopping questions like these on ChatGPT, Gemini, Perplexity, Claude and Google AI Overviews, and shows which brands and stores each answer recommends and which pages it drew on.