Upselling and cross-selling

Also called Upsell, Cross-sell, Account expansion

Selling more to people who already buy from you. The cheapest revenue available and the most often forgotten.

What it means

Upselling is moving a customer to a higher-value version of what they already buy. Cross-selling is selling them something additional alongside it.

Both are expansion revenue: growth from the existing customer base rather than from new customers.

Why it matters

The acquisition cost is effectively zero and the conversion rate is far higher than for a stranger. In most businesses it is the single most profitable activity available and it happens by accident rather than by design.

In subscription businesses it is what produces negative net revenue churn, where existing customers grow faster than others leave.

What it looks like in practice

Map what an existing customer could plausibly need next, and make sure somebody is responsible for asking.

Time it to a moment of value rather than to a moment of billing. The right time to offer more is just after something has gone well.

Keep it genuinely relevant. Customers forgive an offer that fits and remember one that did not.

What to watch out for

Turning support into a sales channel so heavily that customers stop contacting you.

Selling complexity to a customer who has not yet succeeded with the simple version, which increases churn rather than revenue.

Where to get proper advice

Your own purchase data will show what typically gets bought together. Nothing external knows your customers better than that.