The UK Income & Side-Hustle Tax Planner

What it does

The classic side-hustle mistake: spend the money all year, then get hit with the full tax bill in January. This planner makes sure that never happens to you.

• Know your bill early — a live estimate of your 2026/27 tax as you earn, not a January surprise
• Know what to set aside — a simple “save this much from every payment” figure
• Log income and expenses as you go — and it tells you whether claiming expenses or the £1,000 tax-free allowance saves you more
• Get ready for Self Assessment — a simple checklist with every deadline, plus a countdown to 31 January

How it works

1. Enter your job income (salary, tax code, pension) once.
2. Log your side-hustle income and costs as they happen — 30 seconds each.
3. Read the dashboard: your bill so far, your set-aside amount, and any warnings.

What you get

• The 7-tab planner as an Excel file and a Google Sheets version
• A 16-page plain-English guide: sort your side-hustle tax before January — what you can claim, worked examples, and a December-to-January action plan

For employed people with a side income and sole traders — not for limited companies.

Good to know

• Instant download the moment you pay — and it’s yours for good
• Comes as an Excel file and a Google Sheets version (the link is inside your download)
• Built for the UK 2026/27 tax year — all rates and limits already correct
• Your numbers stay on your device — nothing gets uploaded anywhere
• Lost your file? Email us and we’ll replace it free

An educational tool to help you get organised — not regulated financial advice.

Sort your savings too? Get this plus the Savings System in the bundle for £34 — the Regular Saver Ladder Planner comes free.

Self-employed full time, with no day job? This planner is built for people with a salary and side income. If your business is your only income, the Sole Trader Spreadsheet or one of the trade-specific workbooks will suit you better.

Questions