The CGT software accountants actually want
We're building AI-powered capital gains tax software for UK professionals. Upload broker statements, AI extracts the trades, you verify, and our calculation engine does the rest.
The CGT platform your practice deserves
The tools haven't kept up with the complexity. Your time is worth more than this.
Hours → Minutes
What takes hours in spreadsheets takes minutes here. AI extracts trades from broker statements—you review and confirm.
All clients. One place.
Manage your entire client portfolio from a single dashboard. Track Section 104 pools, generate reports, and keep everything organised.
SA108 ready
Same Day Rule, 30 Day Rule, Section 104 pooling—applied per HMRC guidance. Review outputs and export for Self Assessment.
Built for members of
The tools haven't kept up
Accountants pride themselves on precision. Yet the tools available force imprecision.
Spreadsheets. Still.
Manually keying trades, maintaining Section 104 pools by hand, copy-pasting between tabs. One wrong formula and everything downstream is wrong.
Clients turned away
Complex trading behaviour means hours of extraction and calculation. Many practices simply can't justify the time—so clients go underserved or worse, don't declare at all.
Options? Forget it.
Section 144 for exercise/assignment, Section 148 for written options—most tools don't even attempt this. Clients with options are on their own.
Quotes that scare clients off
When you quote realistically for the hours involved, clients baulk. They try DIY, make mistakes, or simply don't declare. Nobody wins.
PrompTax exists because we couldn't find a tool that does all of this properly.
Why Choose Promptax?
Professional-grade features you won't find elsewhere
Multi-File PDF & CSV
HMRC Matching Rules
Full Options Support
Multi-Currency Conversion
Continuous Pool Ledger
ISA Account Detection
Audit-Ready PDF Reports
Cryptographic Verification
SA108 Ready Output
Intuitive Verification UI
Daily Spot FX Rates
Capacity Multiplier
Client Management Portal
Cross-Year 30-Day Matching
Corporate Actions Support
Intelligent Trade Pairing
Loss Carry Forward Tracking
Historic Tax Band Detection
Join the Private Beta
We're looking for accountants and tax advisers who want to help shape the product
What we're looking for
Accountants or tax advisers
Who handle CGT calculations for clients with equity trades
Willing to share feedback
Tell us what works, what doesn't, and what's missing
Patient with rough edges
It's a beta—things will break, and we'll fix them quickly
What you get
Where we are
Core CGT Engine
Working
AI Extraction
Working
Polish & Edge Cases
In progress
The platform handles equities, options, and multi-currency trades. We're refining the experience based on real-world usage.
Ready to try it?
We're keeping the beta small so we can work closely with each tester.
Request Access