How Omnicogi tracks each UK tax wrapper — allowances, per-wrapper performance, and tax relief.
Annual allowance: £20,000 · Tax-free growth and income
All capital gains and dividends inside an ISA are completely free from UK tax — no CGT, no income tax. You can hold shares, funds, ETFs, and bonds.
Omnicogi tracks your annual ISA contributions and shows remaining allowance for the current UK tax year (6 April – 5 April). It also calculates per-wrapper XIRR and TWR so you can see how your ISA performs independently of your other accounts.
Annual allowance: up to £60,000 · Tax relief on contributions
Contributions to a SIPP attract tax relief at your marginal rate. Basic rate taxpayers receive 20% relief automatically (the government adds 25p for every 80p you contribute). Higher rate taxpayers claim the additional 20% via Self Assessment.
Omnicogi tracks SIPP contributions and surfaces the basic rate relief amount. Access is locked until age 55 (rising to 57 from 2028). Growth inside the SIPP is tax-deferred, not tax-free — you pay income tax on withdrawals.
No annual allowance · CGT and income tax apply
A GIA has no wrapper protection. Capital gains above your Annual Exempt Amount (AEA) are subject to CGT. Dividend income above the dividend allowance is subject to income tax.
Omnicogi tracks realised and unrealised capital gains in your GIA using Section 104 pooling, and shows your running total against the current Annual Exempt Amount.
Omnicogi calculates XIRR and TWR independently for each portfolio. If you have one ISA and one SIPP, you get separate performance figures for each — so you can compare how your ISA stock picks performed against your SIPP fund choices over the same period.
The aggregate dashboard combines all portfolios weighted by value, giving you a whole-of-portfolio XIRR that accounts for all your capital, regardless of wrapper.
All allowance tracking and CGT calculations in Omnicogi are aligned to the UK tax year: 6 April to 5 April. When you switch to a new tax year, contribution counters reset automatically.