I sell on Online Market places, do I need to do Self Assessment?

Yes, Selling online, even occasionally, creates taxable income

When You Must File

• Operating as a self-employed trader, even part-time.
• Additional untaxed income not captured by PAYE.

Record-Keeping Tips

• Track sales, costs, and receipts.
• Deduct allowable business costs (materials, shipping, fees) if considered a trade.
• If total sales exceed the £1,000 trading allowance, declare them on Self Assessment.