Best UK ETF Brokers 2026: Which Platform Actually Costs You Less
Picking a UK ETF broker in 2026 is mostly a fight between percentage fees and flat monthly fees, and the crossover point can save (or cost) you hundreds of pounds a year. Here are the seven platforms worth comparing, what each one really charges once you factor in ISA and SIPP wrappers, FX spreads and dealing commissions, and which one fits your pot size.
What actually makes a UK ETF broker good in 2026
For most UK investors a broker's cost is not the trading commission you see on the marketing page. It is the platform fee (a percentage or flat monthly charge for holding your assets), the FX spread when you buy US or global ETFs, the SIPP surcharge layered on top of your ISA fee, and how the whole lot is capped once your pot grows. Ignore any of those and you can end up paying five or ten times more than you needed to.
The good news: since 2024 the market has split cleanly into flat-fee platforms (Interactive Investor, InvestEngine, Trading 212) and percentage-fee platforms (Hargreaves Lansdown, AJ Bell, Vanguard UK). Pick the side that matches your pot size and the rest is fine tuning.
The seven UK ETF brokers worth comparing
| Broker | Platform / account fee | ETF dealing fee | FX conversion | ISA + SIPP available |
|---|---|---|---|---|
| Trading 212 | £0 | £0 | 0.15% | ISA yes, SIPP no |
| InvestEngine | £0 (DIY) | £0 | 0.35% on US-listed | ISA yes, SIPP yes |
| Freetrade | £0 Basic / £5.99 mo Standard / £11.99 mo Plus | £0 | 0.99% / 0.59% / 0.39% | ISA (Standard+) / SIPP (Plus) |
| Vanguard UK | 0.15% capped at £375/yr | £0 on Vanguard ETFs | n/a (LSE GBP shares only) | ISA yes, SIPP yes |
| Hargreaves Lansdown | 0.45% platform (ETF cap £45/yr in ISA) | £11.95 (drops with volume) | 1.00% up to £5k, tiered down | ISA yes, SIPP yes |
| AJ Bell | 0.25% platform (ETF cap £3.50/mo ISA, £10/mo SIPP) | £5.00 online | 0.75% up to £10k, tiered down | ISA yes, SIPP yes |
| Interactive Investor | £4.99-£19.99 flat monthly | £3.99 online | 1.50% up to £25k, tiered down | ISA yes, SIPP yes (+£10 mo) |
The percentage vs flat fee crossover
The single most useful number for a UK ETF investor is the pot size at which a percentage-fee platform costs the same as a flat-fee one. Below that number you pay less as a percentage. Above it, a flat monthly bill is the cheaper deal forever, because it never grows with your portfolio.
| Pot size | AJ Bell ISA (0.25%, ETF cap) | Vanguard UK ISA (0.15%) | Interactive Investor Investor plan (£11.99/mo) | Cheapest |
|---|---|---|---|---|
| £10,000 | £25/yr | £15/yr | £143.88/yr | Vanguard |
| £30,000 | £42/yr (capped) | £45/yr | £143.88/yr | AJ Bell |
| £60,000 | £42/yr (capped) | £90/yr | £143.88/yr | AJ Bell |
| £120,000 | £42/yr (capped) | £180/yr | £143.88/yr | AJ Bell |
| £250,000 | £42/yr (capped) | £375/yr (capped) | £143.88/yr | AJ Bell |
| £500,000 | £42/yr (capped) | £375/yr (capped) | £143.88/yr | AJ Bell |
The AJ Bell ISA charge column above assumes you hold only ETFs, because AJ Bell caps the platform fee on exchange-traded assets at £3.50 per month (£42 per year). Hold funds or shares of individual companies and the 0.25% keeps ticking up. For a pure ETF ISA, AJ Bell's fee cap is one of the best-kept secrets in the UK market.
DIY app brokers vs full-service platforms
App-first (Trading 212, InvestEngine, Freetrade)
- Zero or near-zero fees on small pots
- Fractional ETF investing standard
- Slick mobile UX, weak desktop research
- SIPPs limited (InvestEngine yes, Freetrade Plus only)
- Younger businesses, less deep support for large accounts
Full-service (HL, AJ Bell, Interactive Investor)
- Full ISA, SIPP, LISA and JISA menu
- Deep fund and ETF research and screening
- Phone support and estate handling
- Higher headline fees, capped for ETF holders
- FCSC protected up to £85k like the app brokers
ISA, SIPP or GIA - where your ETFs actually live
The broker is only half the picture. UK investors get three main wrappers to hold ETFs, and each one has its own fee treatment on the same platform.
- Stocks and Shares ISA - £20,000 annual allowance in 2026-27. All growth, dividends and capital gains are tax-free forever. Should be filled first for almost every UK investor.
- SIPP - up to £60,000 annual allowance (or 100% of earnings if lower). Gets 25% basic-rate tax relief added automatically, and higher-rate/additional-rate payers claim more via self-assessment. Locked until age 55 (57 from 2028).
- GIA / general investment account - no annual limit, no wrapper, all dividends and gains taxable. Only use once ISA and SIPP allowances are full, or for money you may need before 55.
Which broker wins for which investor
PICK A UK ETF BROKER IN FIVE STEPS
- Under £50k and mostly building an ISA: Trading 212 or InvestEngine, both free with GBP ETFs and no dealing fees.
- £50k-£200k, ETF only, want a proper ISA and SIPP: AJ Bell wins on fee caps for ETF holders (£3.50/mo ISA, £10/mo SIPP).
- £200k+ or want one all-in-one platform for the household: Interactive Investor's flat fee stops growing and covers ISA, SIPP and GIA in one login.
- Vanguard UK ETFs only, keep it simple, no US or thematic bets: Vanguard's own platform at 0.15% (capped £375/yr) is fine forever.
- Fine-grained control, US options, currency hedging: Interactive Brokers UK (not compared above) is the cheapest for advanced investors but with a steeper learning curve.
Costs beyond the platform fee that quietly matter
- FX spread - buying VWRP in GBP on the LSE avoids FX entirely. Buying the USD line of the same UCITS ETF costs 0.4-1.5% each way at UK brokers.
- Regular investing discounts - HL, AJ Bell and Interactive Investor all charge £0-£1.50 for scheduled monthly ETF buys vs £5-£12 for one-off trades.
- Dividend reinvestment (DRIP) - InvestEngine and Trading 212 auto-reinvest for free. HL charges 1% (min £1, max £10) per line.
- SIPP exit and drawdown fees - most platforms have removed exit fees, but drawdown, UFPLS and annuity purchase can still cost £150-£300 one-off.
- Interest on uninvested cash - a £5,000 idle balance at HL earns roughly 2.5%, at Trading 212 up to 5% (with restrictions). Over a year that gap is bigger than most platform fees.
Frequently asked questions
What is the cheapest UK ETF broker in 2026?
For pot sizes under about £30,000, Trading 212 and InvestEngine are effectively free once you buy GBP-denominated LSE ETFs. Above £30k the winner shifts to AJ Bell (thanks to the £3.50/month ETF cap in an ISA) and, above roughly £200k, to Interactive Investor's flat monthly fee.
Can I buy US ETFs like VOO or VTI in a UK ISA?
No. Since 2018 the PRIIPs regulation blocks UK retail investors from buying US-domiciled ETFs because those funds do not publish a Key Information Document in the EU format. Use the UCITS equivalents: VUAG for the S&P 500, VWRP for FTSE All-World, and VUKG for the UK 100.
Should I use my ISA or SIPP for ETFs?
Fill your Stocks and Shares ISA first for anything you might need before age 55, because withdrawals are tax-free at any time. Use a SIPP for money you can commit to retirement, because the 25%+ tax relief on contributions typically beats any ISA advantage even after withdrawal tax. Most UK investors use both.
Is Trading 212 safe compared to Hargreaves Lansdown?
Both are FCA-regulated and covered by the Financial Services Compensation Scheme up to £85,000 per person per firm on cash and investments. Trading 212 is a smaller, newer business, but the client asset protections and FSCS backstop are the same. The real difference is depth of service (research, phone support, estate handling) rather than safety.
Do UK ETF brokers charge dealing fees on regular monthly investments?
AJ Bell, Hargreaves Lansdown and Interactive Investor all offer scheduled monthly ETF investing at £1.50 or less per trade (Interactive Investor gives one free regular trade per month on the Investor plan). Trading 212, InvestEngine and Freetrade charge £0 for every trade, scheduled or otherwise.
Can I move an existing ISA or SIPP to a cheaper broker?
Yes, every UK broker in this comparison accepts ISA and SIPP transfers in specie (holdings stay invested) or as cash. Transfers usually take 2-4 weeks and no platform on this list charges an exit fee anymore. Do NOT withdraw and re-contribute, because that uses up your annual allowance.