Type the question. Get the answer.
Write your client's tax query in plain English. Get accurate calculations, full working papers, and a professional advisory memo — in seconds, not hours.
Tax calculations take hours. They shouldn't.
Between cross-referencing rate tables, checking band thresholds, applying marginal relief, and drafting the working papers — a single client file can eat half your day.
- Manually computing bands and thresholds
- Cross-referencing HMRC rate tables
- Calculating IT, NIC, CGT, CT in separate spreadsheets
- Writing working papers from scratch
- Double-checking every figure against legislation
- Type the query, get every figure calculated
- FA2024 and FA2025 rates built in — always current
- IT, NIC, CGT, CT, SDLT all computed in one go
- Full HMRC-format working papers instantly
- Professional memo with legislation references in seconds
Three steps. That's it.
From client query to professional advisory memo with full working papers.
Write your client's tax query
Plain English. Employment income, rental property, capital gains, company car — describe the whole picture in one go.
We calculate everything
AI classifies the tax heads. The deterministic engine computes every figure band by band against verified HMRC rates. Every number has a working paper trail.
Get your advisory memo
Executive summary, detailed computations, legislation references, and planning alerts. Export as PDF, Word, or send as a branded email.
Every UK tax. Calculated properly.
Not approximations. Not AI guesses. A deterministic computation engine that follows the exact statutory rules — band by band, relief by relief.
Income Tax
Full NS/S/D ordering, PA taper at £100k, marriage allowance, gift aid BRB extension, savings nil rate, starting rate for savings, property finance cost reducer.
National Insurance
Class 1 employee, Class 4 self-employed, employer NIC with employment allowance. Rates updated for both FA2024 and FA2025.
Corporation Tax
Small profits rate, main rate, marginal relief with associated companies, short accounting period apportionment, current period loss relief, QCD preservation.
Capital Gains Tax
Residential and non-residential rates, BADR, annual exempt amount, PPR with letting relief, capital losses b/f, multiple disposals.
Stamp Duty & Land Tax
SDLT residential and non-residential bands, first-time buyer relief, additional property surcharge, non-resident surcharge. Plus LBTT and LTT.
Capital Allowances
AIA (time-apportioned for short periods), FYA, main pool and special rate WDA, small pool write-off, SBA.
Employment Benefits
Company car (CO2-based percentage), car fuel, van and van fuel, beneficial loans at official rate, accommodation, use of assets.
Employment Deductions
Occupational pensions, professional subscriptions, payroll giving, mileage allowance shortfall.
Planning Alerts
60% effective rate trap, pension optimisation opportunities, marriage allowance eligibility, dividend vs salary extraction.
Ready to send. Ready to file.
Each memo is ready to go to your client or straight into your working papers.
Client earns £110,000 salary, £12,000 rental income (£3,000 finance costs), £8,000 dividends, company car with list price £35,000 and 120g/km CO2. Tax year 2025/26...
We checked every calculation against our manual workings. The marginal relief, the PA taper, the NIC bands — all exact. The 89 ACCA test results speak for themselves.
The working papers alone save us two hours per client file. Having legislation references auto-linked means we can stand behind every figure.
The planning alerts caught a 60% effective rate trap we hadn't flagged. The pension contribution suggestion saved our client over three thousand pounds.
Stop doing tax maths by hand.
89 verified tests. 11 tax types. Full working papers. Start producing advisory-grade memos in minutes, not hours.
No credit card required