Why TaxButler exists
Self Assessment shouldn't mean hours of forms or a bill in the hundreds. Most people simply need their tax worked out correctly and filed properly.
About Us
Financial expertise meets intelligent technology.
TaxButler brings together expertise in finance, accounting and technology to make UK Self Assessment simpler and more affordable. Our secure agentic platform handles much of the preparation, while our finance experts keep the rules right.
Mark Devine
Founder & CEO
Meet our founder
A CFO's view of what tax should feel like.
Mark Devine is an experienced CFO and CIMA-accredited accountant with years of running large businesses behind him.
He saw early how agentic technology could transform finance work, and founded TaxButler to bring that to everyday UK taxpayers: fast, affordable returns, still checked by professionals.
Today Mark leads TaxButler's team of accounting professionals and technology experts.
CFO
Years running large businesses
CIMA accredited
Chartered management accountant
BA Economics
University of Oxford
MBA & Master's
Postgraduate business training
What we stand for
Built by finance people, powered by technology.
Our finance expertise
TaxButler is shaped by people who have worked in finance and accounting, and understand where real returns go wrong.
Our technology expertise
Our proprietary agentic platform gathers, organises and checks information, doing in milliseconds what used to take hours.
Responsible agentic automation
Technology prepares and explains. A deterministic, versioned tax engine does the maths. Anything requiring judgement goes to a person.
You stay in control
Every return is validated against HMRC's rules, then you review and submit it yourself.
Security and customer trust
Private document storage, restricted access, consent-based HMRC connections and nothing filed without your approval.
Meet the team
The people behind TaxButler.
Photo coming soon
Tax specialist
Name and credentials to follow.
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Technology lead
Name and credentials to follow.
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Client success
Name and credentials to follow.
Tax sorted. Without the usual bill.
Calculate for free. Validate and submit yourself from £79.