How can I sell to my existing customers?

Introduction

You already have plenty of customers, but which ones are likely to buy from you again? And what are they interested in?

Did you know existing customers are 60% likely to buy from you again, while a new prospect is only 5%-20% likely to buy from you (Marketing Metrics book by Paul Farris, Neil Bendle, Phillip Pfeifer, and David Reibstein)? And repeat customers spend 67% more than new customers (Manta and BIA/Kelsey)?

How do you sell to your existing customers? Do you know what other products or services they are interested in? You can use your data to find out.

By using JH Data Science’s solution, you can use your existing sales data to identify those customers likely to buy from you again, and recommend interesting products or services to them. You can boost your profits by targeting those customers most likely to re-engage, with even less cost and effort than acquiring new ones.

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About JH Data Science

Jen is a full time freelance data scientist. Her work has brought results to clients all over the globe – from helping a small business segment their customers, a national restaurant chain understand drivers of supply chain stock shortages, and a startup refine their ad channel allocation product. She has applied data science techniques for customer growth across a variety of industries.

See more about Jen.

Offer

You send us an anonymized sample of your customer sales data, things like customer ID, order dates, and products or services purchased.

Customer IDOrder IDOrder DateProductProduct Cost
360201/01/2026Product A£500.00
360201/01/2026Product B£250.00
499002/01/2026Product C£100.00
205302/01/2026Product A£500.00
2010003/01/2026Product C£100.00

We provide you with a deployment-ready solution that predicts which customers are ready for an up-sell or a cross-sell, and what products or services to offer them.

Customer IDUpsell LikelihoodRecommended Product
20HighProduct B
36MediumProduct C
49LowProduct A

You can run this solution to get regularly updated information about which customers are ready for an upsell or a cross-sell. You can use this to focus your sales and marketing efforts on the customers most likely to re-engage – improving your profits with less effort and cost than acquiring new customers.

You will receive complete working source code, packaged for your IT team to deploy, a guide for how to use the solution to sell to existing customers, and a guide for how to monitor the solution performance over time to ensure it remains fit for purpose.

You completely own this solution – it is customized to your data, is implementable at low cost within your own IT systems without additional software or hardware costs, and it doesn’t require a subscription or any recurring cost to run.

Jen supports you through the whole process, from project initiation, through to solution development and final handover. See more about working with Jen.

Turnaround

Typically four weeks from data delivery. Receive a solution design and draft implementation plan after one week, and a complete solution and implantation plan after four weeks.

Price

From £2,500 (€2,900 or $3,400). Typically £2,500 to £4,000 depending on data complexity.

Ready to find out who’s upsell-ready?

Book an appointment with Jen for a short video call to discuss your business problem and how she can help.