How to Invest Globally from the UK: Cheapest Brokers and Tax Guide (2026)

Buying US stocks in a UK account requires GBP → USD conversion. The FX markup is the biggest variable cost:

• Trading 212 (ISA): 0.15% FX fee. On £10,000, that's £15.
• Interactive Brokers (no ISA): 0.08–0.2 bps FX spread. On £10,000, that's ~£1.
• Freetrade (ISA): 0.45% FX fee. On £10,000, that's £45.
• Hargreaves Lansdown (ISA): 1% FX fee, capped at £12.50. On £10,000, that's £12.50.
• eToro: 1.5% FX fee (no ISA). On £10,000, that's £150.
• High street banks: 2.5–3.5% FX markup.

• CGT: Annual exempt amount £3,000 (2024-25). Gains above: 18% (basic rate) or 24% (higher rate). ISA and SIPP gains are fully exempt.
• Dividend allowance: £500/year tax-free. Above: 8.75% (basic), 33.75% (higher rate). ISA dividends fully exempt.
• US dividend withholding: US withholds 15% (reduced rate under UK-US treaty). Inside ISA, cannot reclaim — 15% is permanently lost. Inside GIA or SIPP, claim foreign tax credit via Self Assessment.
• Self Assessment: Declare foreign dividends and gains via SA106 (foreign income) and SA108 (capital gains) in your annual return.

• UK retail investors generally cannot purchase US-listed ETFs at standard UK-regulated brokers. Under the UK's retained PRIIPs regulation, US-domiciled ETFs (VOO, SPY, QQQ) do not have approved UK Key Information Documents (KIDs), so UK-regulated platforms (Hargreaves Lansdown, AJ Bell, Trading 212) block access. IBKR's non-UK entity provides access for eligible professional clients, but this is not available to most retail investors.
• UCITS ETFs (VUSA, CSPX): Ireland-domiciled equivalents — these ARE fully accessible to UK retail investors. 15% US dividend withholding (vs 30% for non-treaty). ISA-eligible. GBP-hedged variants available. Expense ratios are slightly higher (e.g. VUSA: 0.07% vs VOO: 0.03%) but the regulatory access is universal.
• For ISA investors: Use UCITS ETFs — ISA-eligible, UK PRIIPs compliant, and better dividend withholding treatment than US-domiciled funds.
• For GIA investors: UCITS ETFs remain the practical choice for most UK retail investors. IBKR may offer US-listed ETF access depending on account classification — verify at time of purchase.
• Recommendation: UCITS ETFs (CSPX, VUSA, IWDA, VWRL) are the correct instruments for UK retail investors investing in global equities from a UK platform.

• Investing up to £20,000/year (ISA limit): Trading 212 ISA (0.15% FX, no platform fee) or Hargreaves Lansdown ISA (better research tools).
• Investing £20k–£100k/year: Trading 212 ISA for ISA allocation + IBKR for GIA allocation (FX savings matter more at scale).
• Passive monthly investor: Trading 212 ISA with automatic investment plans. Set and forget.
• Retirement focus: AJ Bell or Hargreaves Lansdown SIPP for the pension wrapper; IBKR for GIA investments.

UK investors have a strong advantage: the ISA wrapper eliminates all UK taxes on investment returns. Here's how to set up correctly:

• Priority 1 — Open a Stocks & Shares ISA: Before doing anything else, open an ISA. The £20,000/year tax shelter is the most valuable tool available to UK investors. Hargreaves Lansdown, AJ Bell, Vanguard UK, and Trading 212 all offer S&S ISAs.
• Priority 2 — Choose investments: Inside your ISA, buy UCITS-compliant global ETFs. iShares MSCI World UCITS (IWDA or SWDA), Vanguard FTSE All-World UCITS (VWRL/VWRP), or Fidelity Index World Fund.
• Priority 3 — FX cost matters for non-GBP ETFs: IWDA is USD-denominated but GBP-tradeable on London Stock Exchange. Your broker converts GBP→USD at their rate when you buy. HL charges 1%; Trading 212 charges 0.15%; IBKR charges 0.1%.
• Priority 4 — SIPP for retirement: After maxing ISA, add SIPP contributions. 20-40% tax relief on contributions (depending on your tax band) makes SIPP contributions effectively the same as getting free money from HMRC.
• Priority 5 — GIA for overflow: Only use a General Investment Account after exhausting ISA and SIPP limits. CGT and dividend tax apply here.

A critical point that many UK investors miss when starting global investing: US-domiciled ETFs (VOO, VTI, QQQ, SPY) are not available to UK retail investors.

• MiFID II PRIIPs regulation: Since 2018, EU and UK regulations require ETFs sold to retail investors to provide a KID (Key Information Document) in a specific format. US ETFs don't produce KIDs — so UK brokers cannot sell them to retail investors.
• The consequence: You cannot buy VOO, VTI, SPY, or most US-registered funds through a UK ISA or regular brokerage account.
• The solution: Irish-domiciled UCITS ETFs replicate the same indices. CSPX (iShares S&P 500 UCITS) = equivalent of SPY. IWDA (iShares MSCI World UCITS) = equivalent of total world. VUSA (Vanguard S&P 500 UCITS) = equivalent of VOO.
• Additional benefit: UCITS ETFs domiciled in Ireland are subject to the 15% US dividend withholding tax (under the Ireland-US tax treaty), vs 30% withholding for UK-resident investors buying US ETFs directly. The UCITS structure saves 15% on dividend withholding.

The Stocks and Shares ISA is the most powerful tool for UK investors building a global portfolio. Understanding how to maximize it and what to hold inside vs outside changes the long-term outcome significantly.

• ISA allowance: £20,000 per tax year (April 6 – April 5). Cannot carry forward unused allowance to next year — use it or lose it.
• Investment priority: 1) max ISA first (tax-free forever), 2) max SIPP for pension (tax relief on contributions), 3) general investment account for surplus.
• What to hold in ISA: accumulating global ETF (VWRA or IWDA). No tax on reinvested dividends, no CGT on sale. The ISA is most valuable for high-growth assets — put your most aggressive equity allocation here.
• ISA platforms: Vanguard Investor UK (simplest, 0.15% fee capped at £375/year, Vanguard funds only), Trading 212 (wider ETF selection, no platform fee), Freetrade (good selection, £5.99/month for ISA), AJ Bell (0.25% fee capped at £3.50/month for ETFs).
• Lifetime ISA (LISA): for first home buyers or retirement under 40. £4,000/year contribution receives 25% government bonus (up to £1,000/year). Withdrawal penalty outside qualifying events. Good for house deposit savings.
• Junior ISA: £9,000/year for under-18s. Locked until age 18. Global ETF strategy applies — VWRA in a JISA accumulates tax-free through a child's entire 18-year horizon.

• CGT annual exempt amount: £3,000 for 2026/27 (reduced from £12,300 in 2022/23). You can realise up to £3,000 in gains each year without CGT.
• CGT rates: 18% (basic rate taxpayer) or 24% (higher/additional rate) on gains from shares and ETFs sold outside ISA.
• Bed and ISA: sell ETFs in your GIA, realise gains up to the CGT allowance, then immediately buy the same ETF inside your ISA. No wash sale rule in UK — you can repurchase the same ETF immediately.
• Section 104 pool: UK uses average cost basis (Section 104 pool) for CGT calculation on shares of the same class. This differs from FIFO/LIFO used elsewhere — UK IBKR users must recalculate themselves.
• HMRC reporting: report gains on self-assessment SA108. Non-residents selling UK property must report even if no UK income tax obligation.
• Loss harvesting: realised losses offset gains. Unutilised losses can be carried forward indefinitely. Register capital losses on your SA form even if no tax is due that year.

• Q: Should UK investors use IBKR or a simpler platform? A: For beginners or small portfolios (<£30,000): Vanguard UK or Freetrade ISA are simpler and adequately cheap. For larger portfolios (>£50,000) or when ISA allowance is maxed: IBKR wins on cost (no custody fee, 0.1% FX vs 0.45%+ elsewhere).
• Q: Can UK residents buy US-listed ETFs (SPY, VTI)? A: Technically restricted for retail investors under PRIIPS regulations — US ETFs don't provide a PRIIPS Key Information Document. IBKR and some other brokers may allow this for professional clients. For retail investors, use UCITS equivalents (CSPX, VWRA).
• Q: What is 'UK Reporting Fund status' and why does it matter? A: ETFs with HMRC-approved UK Reporting Fund status are taxed more favourably than non-reporting funds. Non-reporting offshore funds are taxed on gains as income (up to 45%) rather than CGT (18–24%). Always check that your ETF has UK Reporting Fund status — VWRA, IWDA, CSPX, EIMI all do.
• Q: How do dividends in a UK ISA work? A: Inside an ISA, dividends are completely tax-free — no dividend tax regardless of your income. UK-source dividends outside ISA get a £500 annual allowance, then 8.75–39.35% tax depending on income band.