eCommerce Accounting Guides

Upcoming tax changes for UK online sellers, 2026 to 2031

Every announced tax, VAT, customs and filing change affecting UK online sellers from 2026 to 2031, with dates, who it affects and the official source for each.

Making Tax Digital for Income Tax: what online sellers need to do

Making Tax Digital for Income Tax explained for UK online sellers: who must join and when, qualifying income, quarterly updates, deadlines and penalties.

How to calculate break-even ROAS

How to calculate break-even ROAS for an online store: the formula, worked Shopify and Amazon examples, VAT, break-even ACoS and a target ROAS for profit.

How to switch accountants without missing a deadline

How to switch accountants in the UK, step by step: when to move, professional clearance, HMRC and Companies House access, Xero handover and what to ask for.

Why generic accountants cost eCommerce sellers thousands

Six errors generic accountants make with Amazon and Shopify accounts, what they can cost, questions to ask an ecommerce accountant and how switching works.

When do online sellers need to register for VAT?

When UK online sellers must register for VAT: the £90,000 rolling 12-month test, the 30-day rule, marketplace sales, voluntary registration and what to do next.

Postponed VAT Accounting explained for eCommerce sellers

Postponed VAT accounting explained for UK eCommerce importers: who can use it, how to opt in, the monthly statement, VAT return boxes and pitfalls.

Calculating UK import duty for your upcoming shipment

A pre-shipment checklist for UK importers: incoterms, customs declaration, origin proof, duty deferment account, PVA and landed cost across a mixed container.

How to calculate UK import duty on your next shipment

How to calculate UK import duty: find the commodity code, work out the customs value, apply the rate, add import VAT and get a true landed cost per unit.