UK Side Hustle Bookkeeping Spreadsheet 2026/27 | Self Assessment Tax Tracker Excel | Income Expense Tracker for Vinted eBay Etsy Sellers

Made by a side hustler who learned the hard way.

My first year selling online ended with a shoebox of receipts, a cold cup of tea, and a very long night on the 30th of January. So I built the spreadsheet I wished existed — and this is it.

Ten minutes a week, and your tax return basically writes itself.

WHAT'S INSIDE

★ Income tracker — one row per sale or payout, with dropdowns for Vinted, eBay, Etsy, Depop, deliveries, freelancing and more. Platform fees handled properly so you never double-count.

★ Expense tracker — with the actual HMRC-friendly categories (postage, stock, working from home, the lot)

★ Mileage log — the claim everyone forgets. 45p a mile adds up fast.

★ Tax Snapshot — the clever bit. It watches the £1,000 trading allowance and tells you the moment you need to register, automatically picks whichever deduction saves you more (flat allowance vs real costs), and estimates what to set aside so January never surprises you. Works whether the hustle is your whole income or on top of a day job.

★ Key dates tab — every deadline that matters, in plain English

★ Bonus invoice template — for freelance work, fill in and send

WHY UK-SPECIFIC MATTERS

Most spreadsheets like this are American — wrong tax year, wrong rules, dollar signs everywhere. This one is built entirely around HMRC's 2026/27 rules: the 6 April tax year, the £1,000 trading allowance, Self Assessment deadlines, UK mileage rates.

And with platforms like Vinted and eBay now reporting sellers' earnings directly to HMRC, tidy records aren't optional any more. They're your protection.

GOOD TO KNOW

• Instant digital download — nothing posted
• Works in Microsoft Excel (also opens in Google Sheets and LibreOffice)
• No formulas to build, no setup — cream cells are yours, everything else calculates itself
• Friendly instructions included, written for humans, not accountants
• One-off purchase, use it all year

Honest note: this is a record-keeping tool, not tax advice — for anything unusual, gov.uk or an accountant is your friend. No refunds on digital items, but message me with any problem and I'll sort you out.