Founder library / E-commerce guide

How to start an e-commerce business in the UK

A lean, evidence-led way to find a product, test demand and build an online shop without letting inventory swallow your runway.

Find a narrow reason to exist

‘Homeware’ is not a proposition. A specific product for a specific buyer with a clear reason to choose it is. Read reviews of existing products, search forums and speak to buyers to find frustrations competitors repeatedly ignore.

Model the unit economics first

Work backwards from a realistic selling price. Include product cost, inbound freight, packaging, payment fees, marketplace commission, pick-and-pack, shipping, returns and VAT where applicable. Leave room for customer acquisition. Revenue without contribution margin is expensive motion.

Test demand before buying deep

Use samples, a small batch, pre-orders where appropriate, or a tightly controlled marketplace test. Measure qualified traffic, conversion, returns and customer questions. The objective is learning—not making an early forecast look right.

Choose one primary channel

A focused shop with one reliable acquisition channel beats five neglected storefronts. Search can capture existing intent; marketplaces bring traffic but charge for access; social can demonstrate visual products. Pick the channel that matches how customers already discover the category.

Turn orders into a system

Document product data, stock updates, dispatch, service and returns while volumes are small. Watch cash timing closely. Reorder points, supplier lead times and accurate margin reporting become competitive advantages long before they feel exciting.

Cohort one / 2026

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