Free UK tax tools for online sellers

Find out if you need to tell HMRC about your online selling

Free, no login, takes about 60 seconds. Work out whether your selling counts as trading, then see your real profit after marketplace fees.

Based on current HMRC rules No login required No third-party trackers

Do I need to tell HMRC? Answer a few quick questions about what and how you sell to see whether the trading allowance and Self Assessment rules apply to you. Start the free checker → What’s my real profit? See what you actually keep after listing, transaction and payment fees — with a rough tax set-aside estimate so there are no surprises. Open the profit calculator →

Profit calculators for your platform: Etsy · eBay · Vinted · Depop · Amazon

How it works

Answer a few questions

Tell us what and how you sell. No sign-up, no personal details stored.
Get a plain-English answer

See whether you look like you’re trading and if the rules apply to you.
Know your real profit

Factor in marketplace fees and a rough tax set-aside, with every source dated.

What TaxLaidOut does

Checks whether your online selling looks like trading under HMRC’s ‘badges of trade’.
Explains the £1,000 trading allowance and when you might need a Self Assessment tax return.
Calculates your real profit after marketplace fees, with an estimate of tax to set aside.
Gives a clear, plain-English answer in about a minute — no account, no cost, no spam.

No login required
Based on current HMRC rules
No third-party trackers
Every figure sourced & dated
Not affiliated with HMRC

Get tax-deadline reminders

Friendly nudges before key dates. No spam, unsubscribe any time.

Guides & explainers

Plain-English guides on selling online and UK tax: