Stocks & Shares ISA tracking, done properly
Growth and income inside an ISA are tax-free, so Omnicogi tracks it purely for performance, with no dividend tax or CGT modelling needed.
Join the waitlistTax treatment inside an ISA
No tax to model: all gains and dividend income inside an ISA are exempt. Omnicogi still separates Clean Cash (what you paid in) from Generated Wealth (what the market actually returned), and computes true XIRR against your FTSE 100, S&P 500 or MSCI World benchmark.
What Omnicogi shows for your ISA
- True XIRR: your money-weighted annualised return, calculated on your real contribution dates.
- Clean Cash vs Generated Wealth: what you put in, versus what the market returned.
- Benchmark gap: your ISA performance against the FTSE 100, S&P 500, or MSCI World.
- Zero broker login: imported from a CSV export, never an Open Banking connection.
Frequently asked questions
How does Omnicogi handle ISA tax?
No tax to model: all gains and dividend income inside an ISA are exempt. Omnicogi still separates Clean Cash (what you paid in) from Generated Wealth (what the market actually returned), and computes true XIRR against your FTSE 100, S&P 500 or MSCI World benchmark.
What's the ISA allowance?
The annual ISA allowance is £20,000 across all your ISAs combined.
How do I get my ISA data into Omnicogi?
Export a transaction history CSV from your broker (see broker guides) and upload it to Omnicogi. No broker login or Open Banking connection is required. Add a snapshot from your broker's own statement to reconcile the ledger.
On this page
Other account types
App documentation
Related articles
Related tools
See your real ISA return, not an estimate.
Omnicogi calculates true XIRR and correct UK tax treatment for your ISA, imported from a CSV, no login required.