UK side hustle calculators and tax guides

Checked against official guidance: 26 October 2026.

Choose the route matching how you earn. All calculators keep financial figures in the browser.

• Side hustle tax alongside PAYE
• Full-time self-employed profit
• PAYE plus self-employment
• Sole trader rates and profit
• Scottish self-employed tax
• Online selling: possessions or trading
• Vinted
• eBay
• Etsy and handmade goods
• Delivery driving
• Freelance client work
• Private tutoring
• Trading allowance
• Allowable expenses
• Higher-rate tax
• Self Assessment deadlines
• Payments on account
• Making Tax Digital
• What counts as a side hustle
• Side hustle ideas
• Mileage reimbursement
• Sole trader or limited company
• Marketplace tax guide