Self-Assessment Complete Digital Bundle

Everything you need for your UK side hustle self-assessment in one bundle. The Side Hustle Tax Tracker spreadsheet tracks your income and expenses all year, calculates your estimated tax bill automatically, and produces SA103-ready figures for your return. The Side Hustler's Guide PDF walks you through the whole process in plain English — from gathering records to submitting your return. Both created by a qualified accountant. Available in Excel and Google Sheets. Instant download. 2025/26 tax year.