How to choose the right UK investment platform: a guide to ISAs, SIPPs and trading apps

A growing number of do-it-yourself investing platforms and smartphone trading apps have made it easier and cheaper for UK savers to access the stock market, but choosing the right account requires balancing costs, tax treatment and the level of research and customer support provided.

This guide, compiled by This is Money’s specialist journalists and published by Daily Mail, sets out how to compare leading providers and choose a platform that matches an investor’s objectives and experience. Some links in the original feature are marked with an asterisk and generate an affiliate commission for the publisher; the article states this does not affect editorial independence.

Most UK investment platforms provide access to the two main tax-efficient wrappers: the stocks and shares ISA and the self-invested personal pension (SIPP). The annual ISA allowance (currently £20,000) lets investors shelter returns from UK tax, while SIPPs provide tax relief on contributions and are designed for long-term retirement savings. Providers also offer general investment accounts for investors who have used up their ISA allowance or want fewer withdrawal restrictions.

Key variables when comparing platforms include fee structure, range of tradable assets, quality of trading tools and research, mobile experience, and customer service. Fees can be charged in several ways: a platform management or custody fee that is typically a small percentage of assets under management, dealing charges per trade, and charges for funds where an ongoing charge figure (OCF) applies. Some mobile-first apps advertise commission-free share trading but may generate revenue through other means such as order flow, currency conversion fees for overseas trades, or premium subscription services.

Platform choice should reflect investing frequency and style. Occasional investors who buy and hold a diversified portfolio of funds or ETFs often benefit most from a low flat platform fee and access to fund wrappers, whereas active traders need competitive dealing costs, reliable mobile execution and advanced charting and research tools. Providers aimed at beginners commonly offer model portfolios, ready-made funds or robo-advice, while full-service platforms typically supply more extensive research, analyst commentary and a wider investment universe including individual shares, investment trusts and overseas markets.

Safety and regulation are important. UK platforms are usually authorised by the Financial Conduct Authority and eligible investments held in nominee accounts. Many customers are covered by the Financial Services Compensation Scheme for certain types of failure, but this protection does not cover investment losses caused by market movements. Investors should confirm the regulatory status of any platform and the exact nature of custody arrangements before transferring significant funds.

Transfer costs and incentives also influence decisions. Some platforms charge exit or transfer fees when moving an ISA or SIPP to another provider; other firms offer cash incentives or fee discounts to attract new customers. Investors who plan to move accounts infrequently should still check transfer terms and any potential tax-wrapper implications of migrating investments in-specie versus selling and re-buying holdings.

Research and educational resources can be decisive for less experienced investors. Platforms that provide plain-language guides, model portfolios, fund comparison tools and third-party research make it easier for savers to construct diversified holdings and understand risks. More sophisticated traders may prioritise platforms with live market data, fast trade execution and tools for orders such as limit or stop-loss instructions.

Costs should be considered holistically. A platform with low headline fees may still result in higher overall costs if it primarily offers funds with above-average ongoing charges or if it levies foreign exchange or inactivity fees. Conversely, a slightly higher platform fee might be justified where substantial, independent research or personalised advisory services are regularly used.

The rise of app-based, commission-free investing has broadened access but also shifted some investor responsibilities. The convenience of investing with a few taps must be balanced against the need for a clear savings plan, awareness of tax allowances and an understanding of investment risk. For long-term savers, maintaining a diversified portfolio aligned with goals and tolerances typically outweighs the short-term appeal of trading individual stocks.

Investors choosing a platform should start by defining goals and time horizon, confirming the appropriate tax wrapper, and estimating likely trading frequency. They should then compare providers on total fees, available investments, platform reliability and the quality of customer support. Smaller sums may be best suited to low-cost, app-focused providers, while larger portfolios often warrant the wider service set and research tools of established platforms.

This is Money’s selection highlights that no single provider suits every investor. The best platform is the one that matches an individual’s objectives, tolerance for hands-on management, and sensitivity to fees. Potential customers are advised to read provider terms carefully, check for any promotional or transfer charges, and consider trialling a platform with a modest sum before committing larger amounts.

As the market for online investing continues to evolve, regulators and industry groups have signalled closer attention to areas such as execution quality, transparency of revenue streams and protections for amateur investors. For now, savers can take advantage of a diverse marketplace that ranges from low-cost, app-based providers to full-service platforms offering deep research and model portfolio options, choosing the account and provider that best align with their financial plan.