Bart is your AI-powered tax assistant. It sorts your transactions, tracks your deadlines, and files to HMRC for you.
Bart's take
Bart's an AI tax assistant in your pocket — sorting, reviewing and filing alongside you.
For every transaction, Bart's AI agent suggests a category based on your business and HMRC rules. Approve it in one tap, or change it — you're always in control.
See a clear breakdown of your income and expenses before submitting. Review everything, then send your quarterly update directly to HMRC.
Once submitted, Bart confirms your filing was received by HMRC. You're done until next quarter — Bart tracks the next deadline for you.
Bart handles the complicated stuff so you can focus on your business.
Connect your bank and Bart imports your transactions every day. No spreadsheets, no manual entry.
Bart tracks your quarterly deadlines and nudges you when it's time to file. Never miss one again.
Bank-grade encryption. Open Banking regulated. Your login details are never stored with us.
From setup to filing in minutes, not hours.
Link your Government Gateway and bank account. Bart imports your transactions automatically from then on — no need to reconnect.
Bart's AI agent looks at each transaction and suggests one of four categories. It uses your business context and HMRC's own guidance to make that call. Approve the suggestion or change it — it takes seconds. If you're unsure, just chat with Bart: tell it what you bought and what it was for, and it'll sort the rest.
When you're ready, review and send your quarterly update to HMRC with one tap. Final Declaration support is coming soon, so you'll be able to handle your full MTD obligations without leaving Bart.
Bart is built for UK sole traders using Making Tax Digital. A quick check tells you if you're a good fit.
Answer a few questions to confirm Bart can handle your Self Assessment. Takes less than a minute.
Bart supports quarterly updates for self-employment income now, with Final Declaration coming soon. UK property income and foreign property income are not currently supported. For other income types, find compatible software on GOV.UK.
One price, everything included. Start free — pay when you've used it.
Start for free — your first 5 transactions are on us. If your quarter has 5 or fewer transactions in total, you can file to HMRC for free too. Billing starts at £9.99/month when you need to categorise your 6th transaction. Your free allowance carries across quarters — it doesn't reset.
Join the millions of UK sole traders impacted by Making Tax Digital and let Bart handle your Self Assessment.