About CalcAI
Built for the UK. Free, forever.
What we do
CalcAI builds free, AI-enhanced calculators for UK consumers facing high-stakes financial decisions — solar installation, property purchase, tax compliance, pension planning. Every tool does two things: gives you an instant, accurate result and then explains why that result looks the way it does in plain English, grounded in your specific inputs.
Why the AI layer matters
Most calculators give you a number. CalcAI gives you a number and the reasoning behind it — which orientation factor is suppressing your solar yield, why your effective stamp duty rate differs from the headline rate, what the 60% tax trap means for your pension contributions. The AI explains your specific situation without giving regulated advice.
Our data sources
We use primary UK sources only: HMRC, Ofgem, the Department for Energy Security and Net Zero, MCS, the FCA, HM Land Registry, Revenue Scotland, the Welsh Revenue Authority, and the Bank of England. Every rate, threshold, and constant is versioned with its source and last-verified date.
Regulatory position
Calc AI Ltd is not authorised by the Financial Conduct Authority. We do not provide regulated financial, tax, legal, or medical advice. Our calculators are informational tools. Where a tool includes a lead-generation feature, we operate as a pure introducer under PERG 8.33 — connecting you with FCA-authorised, MCS-certified, SRA-regulated, or ICAEW/ACCA-registered firms who are solely responsible for any advice given. See our Terms & Conditions for full introducer disclosures.
Our expert reviewers
Every tool is reviewed by a named, credentialed professional — a chartered accountant, an FCA-authorised IFA, or an MCS-certified energy assessor. Their name, credentials, and last-review date appear on each tool page. Visit our Authors page to meet the team.
Contact
Found an error in a calculation? Have a question about a tool? Email us at hello@calcai.co.uk. We take calculator accuracy seriously — incorrect outputs on financial tools can have real consequences and we run a monthly regression suite against HMRC and Ofgem reference cases.