Comparison · 2025/26
Stocks & Shares ISA vs General Investment Account
Same investments, very different tax. The Stocks & Shares ISA shelters £20,000 per year completely; a GIA has no limit but taxes dividends and gains every year. Here\'s how to choose — and how to combine them.
Side-by-Side
| Feature | S&S ISA | GIA |
|---|---|---|
| Annual contribution limit | £20,000 (shared ISA allowance) | Unlimited |
| Capital Gains Tax | 0% | 18% / 24% above £3,000 |
| Dividend tax | 0% | 8.75% / 33.75% / 39.35% above £500 |
| Interest tax | 0% | Taxed via PSA (£1,000/£500/£0) |
| On tax return? | No | Yes if gains > allowance or div > £500 |
| Number you can hold | Multiple (from 2024/25) | Unlimited |
| Withdrawal | Any time (flexible ISAs replenish allowance) | Any time — disposal triggers CGT calc |
| Estate (IHT) | Included | Included |
| Joint ownership | No — individual only | Yes |
Worked Example: £50,000 invested at 7% with 3% yield
- Year-1 capital gain ~ £2,000 (within £3,000 CGT exemption)
- Year-1 dividends ~ £1,500
- S&S ISA: tax bill = £0
- GIA, basic-rate investor: dividend tax on £1,000 above £500 allowance × 8.75% = £87.50
- GIA, higher-rate investor: dividend tax on £1,000 × 33.75% = £337.50
- Over 20 years compounding at 7%, the ISA shelter is typically worth 5–15% extra terminal value vs an unsheltered GIA.
The bigger the pot and the higher your tax band, the more the ISA wrapper is worth. For pots above £100,000 outside of a pension, the ISA can save £10,000+ per decade.
Decision Framework
Choose an ISA first if:
- You haven\'t used the £20,000 allowance this year
- You want zero tax admin on dividends and gains
- You want predictable tax-free withdrawals
Add a GIA if:
- You\'ve fully used ISA + pension allowances
- You can use spouse\'s exemptions and dividend allowance
- You hold low-yield growth assets where realised gains can be managed yearly
FAQs
What is a General Investment Account?
A GIA (sometimes called a taxable brokerage account or "dealing account") is an unwrapped investment account. There is no contribution limit, but gains and dividends are taxed each year outside any ISA or pension wrapper.
What tax do I pay on a GIA in 2025/26?
Realised gains above the £3,000 Capital Gains Tax annual exempt amount are taxed at 18% (basic-rate band) or 24% (higher/additional) for shares and funds. Dividends above the £500 allowance are taxed at 8.75%, 33.75% or 39.35%. Interest is taxed via the Personal Savings Allowance (£1,000/£500/£0).
When should I open a GIA?
After fully using your £20,000 ISA allowance and any pension headroom. Spouses can stack: £20,000 each in ISAs, then split GIA holdings to use two £3,000 CGT exemptions and two dividend allowances — effectively £7,000/yr of tax-free dividends and gains.
Can I transfer GIA holdings into my ISA?
Not directly. Brokers offer "Bed & ISA": they sell GIA holdings, move cash to the ISA, then re-buy. This triggers a CGT event on any gain above the £3,000 allowance and resets your cost base. Do it early in the tax year and within allowance to minimise tax.
Are fees the same?
Platform fees are usually identical (0.20–0.45% on funds, 0.10–0.25% on shares). The difference is the tax bill — a 5% dividend yield in a higher-rate GIA loses roughly a third to dividend tax that the ISA keeps.
Calculators & Guides
Calculators for this topic
Compound Interest Calculator
Calculate compound interest on savings and investments over any time period.
Savings Calculator
Project how your savings will grow over time with regular deposits and interest.
Pension Calculator
Estimate your pension pot at retirement and projected annual income.
Salary Sacrifice Calculator
Calculate how much tax and National Insurance you save by making salary sacrifice contributions to a pension, cycle to work scheme or EV car scheme.
Disclaimer: Investment values can fall. Tax treatment depends on personal circumstances. This is information, not advice.