Built for UK side hustlers
Know what to set aside for tax — before HMRC tells you.
Hamster tracks your side-hustle earnings, estimates the tax and National Insurance you’ll owe on top of your day job, and tells you what to put away — so January never comes as a shock.
Android app on Google Play
Launching Sunday
- No bank connection
- Built for UK tax rules
- Free core app
Estimated tax
+ NI owed
£400.00
Worked out as you go
How it looks
Tax, minus the headache
Friendly, simple and built around one question: how much should I keep back?
Your dashboard
Income so far, tax and NI owed, and what you should have set aside — at a glance.
Log earnings in seconds
Pick a category, add the amount and date. That’s it.
Everything in one place
Your full history, filterable by category and date.
Features
Everything your side hustle needs. Nothing it doesn’t.
From the first sale to the tax return, Hamster keeps your numbers tidy so you don’t have to.
Skip manual entry
Import your earnings from a CSV instead of typing in every job by hand.
Never lose a receipt
Snap a photo or attach a file to any expense, so the proof is there if HMRC ever asks.
See your real profit
Find out what you actually make per mile or per hour once costs are taken off.
File it yourself or hand it to your accountant
Export a PDF with your figures mapped to the SA103 self-employment pages. Copy them straight into HMRC’s free online return, or pass the PDF to your accountant.
- Mapped to SA103
- One-tap PDF export
- Accountant-friendly
Track your progress year on year
Compare tax years side by side and watch your side hustle grow.
Plan before you earn it
Use the what-if calculator to see how extra work changes your tax bill before you take it on.
Stay ahead of the taxman
Gentle nudges to keep your records up to date, plus warnings before you cross important tax thresholds.
Platforms
Made for the way you earn
Driving, delivering or selling — plus freelance and creative work. If you earn it, you can log it.
Driving & delivery
- Uber
- Deliveroo
- Just Eat
- Amazon Flex
Selling goods
- Etsy
- eBay
- TikTok Shop
- Vinted
- Depop
Hamster is not affiliated with, endorsed by, or sponsored by Uber, Deliveroo, Just Eat, Amazon Flex, Etsy, eBay, TikTok Shop, Vinted or Depop. All trademarks are the property of their respective owners.
Do I need to connect my bank account?
No, never. Hamster doesn’t ask for your bank login or open-banking access. You add your earnings yourself — by hand or by importing a CSV — and attach receipts as you go.
Does Hamster file my tax return for me?
No. Hamster gives you the figures, laid out to match the SA103 self-employment pages, so you can file your return yourself for free on HMRC’s website — or hand the PDF to your accountant.
What does it cost?
The core app is free, forever. There’s also a small premium subscription if you want to unlock extra features.
Your side hustle, sorted.
Hamster lands on Google Play this Sunday. Free to download, free forever at its core.
Android app on Google Play
Launching Sunday