Upsells, Cross-Sells and Repeat Purchases

The three tests for a good cross-sell

Before you offer something alongside the main purchase, run it past three quick tests. First, would the customer have benefitted from this even if they hadn't bought the main thing today? If the answer is no, the cross-sell is parasitic and customers will feel it. Second, can you genuinely deliver it well, at a price that reflects honest extra value? Third, does it make the main purchase work better? The strongest cross-sells make the main thing more useful, last longer, fit better or finish properly.

Cross-sells that pass all three tests stop feeling like upsells in the bad sense. They feel like the rest of the service the customer was already buying.

The menu approach for service businesses

The simplest cross-sell tool for a service business is a written menu of what you do. Not a website page nobody reads. A printed or emailed menu the customer holds in their hand. One side of A4. Six to ten things, grouped, with prices or price ranges. The job of the menu is to make sure the customer knows what else you offer at the moment when they trust you most - just after the first job has gone well.

The plumbing firm's menu might include the boiler service, the annual maintenance contract, the gas safety check, the bathroom refit, the radiator overhaul, the unvented system inspection and the emergency call-out. The therapist's menu might include the single session, the six-session course, the couples package, the parent-teen consultation, the corporate group session and the supervision hour. The web designer's menu might include the new build, the redesign, the maintenance plan, the hosting, the content audit and the analytics setup.

Hand the menu over with a single sentence. 'In case you ever need anything else, this is what we do. No need to do anything with it now.' That's it. Most customers will glance at it and put it away. Some will take it home and ring you back about something they didn't know you offered. That's where the cross-sell revenue lives.

The bundle approach for shops

For online shops and product businesses, cross-sells live in bundles, related-product blocks and packaging. The candle shop puts the wick trimmer next to the candle. The skincare brand puts the cleanser next to the moisturiser. The bookshop puts the bookmark and the gift wrap next to the till. The supplement company puts the recommended companion alongside the main product, with a one-line explanation of why they go together.

The wording on a good cross-sell block is short and useful: 'Often bought together because [reason].' Or 'We recommend pairing this with [item] for [benefit].' Anything longer than a sentence and the customer stops reading.

Avoid two common mistakes. The first is cross-selling things that don't actually go together. A random recommendation engine that suggests unrelated products is worse than no recommendation at all. The second is cross-selling cheap, low-margin add-ons just to lift the basket value. Customers feel manipulated by it and the long-term damage outweighs the short-term lift.

Cross-selling at the right moment

The four moments in the customer journey when cross-sells land naturally are these. At the point of quoting or proposing the main job, when the customer is comparing options. Just after the main job is delivered well and the customer is happy. In a thank-you message a week or two later, when the customer is using the thing. And at the natural anniversary or refill point, when the customer is back in the market anyway.

Cross-sells in the middle of delivery rarely work. The customer is in the middle of one decision and adding a second one feels like a sales push. Save cross-sells for the calm moments either side.

Worked example: the plumbing firm

A plumbing firm fits a new boiler. The job goes well. At the end, the engineer hands over a one-page menu and says, 'Most customers go on the annual maintenance plan once the boiler is in. Keeps the warranty valid and we come and check it once a year. It's £180. Have a look at the rest in your own time.' Two weeks later, the office sends a thank-you email with a soft mention of the same plan. Six weeks later, a customer service call asks how the boiler is settling in and whether there's anything else around the house that needs looking at. Three of those four moments will produce zero cross-sells. One of them will quietly produce a £180 annual contract for several years.

Worked example: the online homewares shop

An online shop selling handmade homewares ships a £45 candle. In the parcel, a small card mentions the matching wick trimmer (£12) and the linen room spray (£18) with a one-line explanation of why they go together. On the website, the candle product page shows the trimmer and the spray as 'often bought together'. Three weeks after the order, an email mentions a new scent in the same family. None of these are pushy. All of them are quietly available. Across a thousand orders, the cross-sell revenue is significant.

What to do this week

If you're a service business, write your one-page menu. Six to ten offers, grouped, with prices or ranges. Print twenty copies. Hand the next twenty customers a copy at the end of the job. If you're a product business, pick your three best-selling products and write the one-line cross-sell for each. Add it to the product page or the next email. Don't try to do everything. One menu, or three product pairings, is enough to start.

The recurring principle here is the same one running through the category: keep existing customers close. The earlier eBook to revisit is Packaging Your Offer, which covers how to present what you sell so customers can choose easily. The next chapter, Timing the Second Offer, looks at the single biggest lever in repeat purchase work: when you ask.