Best UK Investment Platform 2026: Broker Comparison

The best UK investment platform depends on your portfolio size and what you want to hold, not on brand reputation.

Under £20k: Trading 212 or InvestEngine win on cost and simplicity.

Mid-sized portfolios (£20k-£100k) with mixed funds and shares: AJ Bell hits the sweet spot.

Larger portfolios (£100k+): interactive investor flat fees beat percentage charges by hundreds of pounds a year.

Hargreaves Lansdown is only worth the premium if you genuinely value the service or need niche features.