What to Look for in a UK Investment Platform

Picking an investment platform is a bit like picking a supermarket. They all sell roughly the same stuff, but the layout, the prices, the queues and the self-checkout machines can make one a pleasure and another a reason to swear quietly in the car park.

If you've decided to start investing in the UK, the next decision is where. You'll quickly notice there are dozens of platforms, all with different fee structures, features and target users. The choice can feel paralysing, and a lot of people end up doing nothing because they can't pick.

This article walks through what actually matters when you're choosing a UK investment platform, which bits are marketing noise, and how to match a platform to your situation. No affiliate links, no "best platform" hype, just the checklist.

First, what an investment platform actually is

An investment platform is the app or website where you hold your investments. It's a middleman between you and the market. You send money in, choose what to buy, and the platform executes the trades and looks after the admin.

Most UK platforms can hold your investments inside tax wrappers like a Stocks and Shares ISA, a Lifetime ISA, a SIPP (self-invested personal pension) or a general investment account. You choose which wrapper suits your goal, and which investments go inside it.

The platform isn't your investment. It's the place your investment lives.

The seven things that actually matter

Here's the full checklist. Not every one matters equally to every investor, but if a platform gets any of these badly wrong, move on.

1. FCA regulation - non-negotiable

First and last check: the platform must be regulated by the UK's Financial Conduct Authority (FCA). This gives you access to the Financial Services Compensation Scheme (FSCS), which protects up to £85,000 per person, per firm, if the platform goes bust.

Check directly at register.fca.org.uk. Type the firm's name. If they're not on the register, walk away. This takes 30 seconds and is the single most important thing you'll do in this whole process.

2. Fees and charges

Fees compound against you the same way returns compound for you. Small differences early on turn into meaningful differences over 20 or 30 years.

The main fees to look for:

  • Platform fee: what the platform charges for holding your account. Usually either a percentage (0.15% to 0.45% a year) or a flat annual fee (£0 to £120).

  • Dealing fees: what it costs every time you buy or sell. Some platforms charge £0, some charge up to £12 per trade, some offer unlimited commission-free trading.

  • Fund fees: charged by the funds themselves, not the platform. An index fund might cost 0.05% to 0.25% a year. Always check.

  • Foreign exchange fees: if you buy US or global shares, some platforms charge up to 1.5% of every purchase as an FX spread. This one is sneaky and easy to miss.

  • Exit fees: what it costs to transfer out. Some platforms charge per holding. Modern platforms usually charge nothing, but older providers sometimes still do.

Rule of thumb: if you have a small pot (£1,000 to £20,000), percentage-based platforms are usually cheapest. Once your pot is larger (£50,000+), flat-fee platforms become better value because their cost stops growing with your pot.

3. Available wrappers

Not every platform offers every account type. Check whether the one you're picking supports:

  • Stocks and Shares ISA (most do)

  • Lifetime ISA (fewer do, and it matters if you're saving for a house or retirement)

  • SIPP (self-invested personal pension, essential if you want to consolidate old workplace pensions)

  • Junior ISA (if you're investing for your children)

  • General investment account (for anything above your tax-free allowances)

Some platforms do a superb job on one wrapper and a mediocre job on another. It's fine to split across two providers if it saves you meaningful money.

4. Range of investments

Platforms differ in what they let you buy. Broadly:

  • Funds (unit trusts, OEICs): pooled investments managed for you.

  • ETFs (exchange traded funds): funds that trade like shares, usually cheap and flexible.

  • Individual shares: UK, US and sometimes global.

  • Investment trusts: closed-end funds with their own quirks.

  • Bonds and gilts: on some platforms only.

For most beginners, any platform that offers a decent range of funds and ETFs is more than enough. Worrying about niche assets before you've bought your first index fund is classic overthinking.

5. Minimum investment amounts

Some platforms require a minimum lump sum to start (£500, £1,000, sometimes more). Others let you start with £1 or £25. If you're just beginning, pick one with a low or zero minimum so you don't have to wait months to get going.

The lowest minimum is the one that actually gets you started.

6. The user experience

This matters more than people admit. If the app is confusing, you'll avoid using it, which means you won't review your portfolio or set up automation. An ugly-but-powerful platform is fine for experienced investors. A clean, friendly app is probably the right call for a first-timer.

Things worth checking before committing:

  • Can you set up a regular monthly contribution in under a minute?

  • Does the app show you your performance clearly, or hide it behind ten menus?

  • Is customer support reachable (email, chat, phone)?

  • Are their help articles actually helpful, or 40 lines of legal disclaimers?

7. Reputation and stability

Look up how long the platform has been around, how many customers it has, and recent reviews on Trustpilot and reddit. A shiny new app can be perfectly safe, but boring and old usually means proven.

Also worth knowing: your investments are held in a separate "custody" account from the platform's own money. If the platform goes bust, your shares and funds don't disappear. They're transferred to another provider. That's a deliberate bit of UK regulation, and it's one of the underrated strengths of the system.

The main UK platforms in 2026, broadly speaking

Here's how the well-known UK platforms tend to position themselves. (This isn't a ranking. It's a shape-of-the-market sketch to help you narrow down.)

  • Vanguard: cheap, simple, focused on their own funds. Great for index investors who just want a Stocks and Shares ISA or SIPP and zero complexity.

  • Trading 212: slick app, commission-free trading, offers ISA and regular investing. Popular with younger UK investors.

  • Hargreaves Lansdown: the big incumbent. Lots of features, lots of content, higher fees. Popular with people who like UK-grown brands and full service.

  • AJ Bell: similar profile to Hargreaves, usually a bit cheaper. Strong on SIPPs.

  • InvestEngine: low-cost ETF specialist. Good for hands-off investors who want a managed or DIY ETF portfolio.

  • Freetrade: app-first, simple interface, commission-free share dealing. Basic tier is cheap, premium adds features.

  • Interactive Investor (ii): flat monthly fee, so better value once your pot is large.

  • Moneybox: automates saving and investing, built around round-ups and habits. Good for people who want the whole journey simplified.

  • Nutmeg: a robo-advisor. You answer questions about risk and goals, they pick and manage the portfolio. Higher fees but very hands-off.

All of these are FCA-regulated and covered by FSCS. The "best" one depends entirely on what you want, not on which one won a blog award this year.

Matching a platform to your situation

You're a total beginner with under £5,000

Pick the one with the cleanest app, lowest minimum, and cheapest index fund options. Fees barely matter at this size, so optimise for "will I actually use it every month?". Don't waste weeks researching, just start.

You want maximum automation

Look at robo-advisors like Nutmeg, or automated savings-and-investing apps like Moneybox. You'll pay slightly more in fees in exchange for not having to decide anything yourself.

You're a DIY investor with a growing pot

Compare percentage vs flat-fee platforms and run the numbers on your actual pot size. Somewhere around £40,000 to £80,000 is usually where flat-fee starts to win.

You want to consolidate old workplace pensions

You'll need a SIPP. Pick a platform with a reputation for smooth transfers, because pension transfers can be the slowest, most admin-heavy thing you ever do.

Don't marry the platform. You're always allowed to change your mind and transfer later.

Common doubts

  • "What if I pick the wrong one?" Transferring between platforms in the UK is straightforward, and most modern providers don't charge exit fees. Wrong-but-started beats right-but-never-done.

  • "Should I use more than one platform?" Usually not at the start. Managing one account is easier than managing three. As your pot grows, it can make sense to use one for ISA and one for SIPP, for example, based on where the fees are best.

  • "What about neobanks like Monzo, Starling or Revolut?" Some now offer basic investing features. They can be a fine place to dip your toe, but for serious long-term investing, a dedicated platform usually gives you more choice and lower fund fees.

  • "Commission-free sounds too good. What's the catch?" The platform still makes money, usually from the spread (the tiny gap between buy and sell prices), FX fees on foreign shares, or premium subscriptions. That's not sinister, it's just worth knowing where the cost actually sits.

A 10-minute decision framework

If you're stuck, here's a fast decision path you can run in your head.

1. Write down how much you expect to contribute in year one. £500? £5,000? More?

2. Pick the wrapper you need: a Stocks and Shares ISA for most, a Lifetime ISA if you're saving for a first home, a SIPP if you're consolidating pensions.

3. Shortlist three platforms that offer that wrapper and are FCA-regulated.

4. Compare their percentage fee, flat fee, FX fees and dealing fees against your expected contributions. The one with the lowest combined cost for your size usually wins.

5. Download the app. If it feels friendly and you can find "set up monthly contribution" in under a minute, that's your platform.

Done. Takes under half an hour, and you're in.

Where Mona fits

Mona doesn't replace your investment platform, it sits alongside it. Mona links to your UK bank via Open Banking and helps you keep the contributions flowing on autopilot: the standing orders into your ISA or SIPP, the monthly round-ups, the habits that feed every platform on this list. The platform does the investing. Mona makes sure the pipe stays open.

This article is for education only and is not financial advice. For free, impartial guidance, MoneyHelper.org.uk (run by the UK government's Money and Pensions Service) has good comparison content, and the FCA register (register.fca.org.uk) is the tool to verify any firm before you send them money.

The bottom line

Pick a UK investment platform that is FCA-regulated, cheap enough for your pot size, offers the wrapper you need, lets you start small, and has an app you'll actually open. Ignore the rest of the noise.

The platforms most UK investors use are all safe, competitive and do roughly the same thing. The wrong platform is usually the one you never open an account with.

The perfect platform doesn't exist. The one you actually fund every month does.

Shortlist three UK platforms tonight, check each on the FCA register, open an ISA on the one that feels simplest, and set up a monthly contribution before you close the app.

Join Mona’s early access waitlist

Join the waitlist

All articles

What to Look for in a UK Investment Platform

Picking an investment platform is a bit like picking a supermarket. They all sell roughly the same stuff, but the layout, the prices, the queues and the self-checkout machines can make one a pleasure and another a reason to swear quietly in the car park.

If you've decided to start investing in the UK, the next decision is where. You'll quickly notice there are dozens of platforms, all with different fee structures, features and target users. The choice can feel paralysing, and a lot of people end up doing nothing because they can't pick.

This article walks through what actually matters when you're choosing a UK investment platform, which bits are marketing noise, and how to match a platform to your situation. No affiliate links, no "best platform" hype, just the checklist.

First, what an investment platform actually is

An investment platform is the app or website where you hold your investments. It's a middleman between you and the market. You send money in, choose what to buy, and the platform executes the trades and looks after the admin.

Most UK platforms can hold your investments inside tax wrappers like a Stocks and Shares ISA, a Lifetime ISA, a SIPP (self-invested personal pension) or a general investment account. You choose which wrapper suits your goal, and which investments go inside it.

The platform isn't your investment. It's the place your investment lives.

The seven things that actually matter

Here's the full checklist. Not every one matters equally to every investor, but if a platform gets any of these badly wrong, move on.

1. FCA regulation - non-negotiable

First and last check: the platform must be regulated by the UK's Financial Conduct Authority (FCA). This gives you access to the Financial Services Compensation Scheme (FSCS), which protects up to £85,000 per person, per firm, if the platform goes bust.

Check directly at register.fca.org.uk. Type the firm's name. If they're not on the register, walk away. This takes 30 seconds and is the single most important thing you'll do in this whole process.

2. Fees and charges

Fees compound against you the same way returns compound for you. Small differences early on turn into meaningful differences over 20 or 30 years.

The main fees to look for:

  • Platform fee: what the platform charges for holding your account. Usually either a percentage (0.15% to 0.45% a year) or a flat annual fee (£0 to £120).

  • Dealing fees: what it costs every time you buy or sell. Some platforms charge £0, some charge up to £12 per trade, some offer unlimited commission-free trading.

  • Fund fees: charged by the funds themselves, not the platform. An index fund might cost 0.05% to 0.25% a year. Always check.

  • Foreign exchange fees: if you buy US or global shares, some platforms charge up to 1.5% of every purchase as an FX spread. This one is sneaky and easy to miss.

  • Exit fees: what it costs to transfer out. Some platforms charge per holding. Modern platforms usually charge nothing, but older providers sometimes still do.

Rule of thumb: if you have a small pot (£1,000 to £20,000), percentage-based platforms are usually cheapest. Once your pot is larger (£50,000+), flat-fee platforms become better value because their cost stops growing with your pot.

3. Available wrappers

Not every platform offers every account type. Check whether the one you're picking supports:

  • Stocks and Shares ISA (most do)

  • Lifetime ISA (fewer do, and it matters if you're saving for a house or retirement)

  • SIPP (self-invested personal pension, essential if you want to consolidate old workplace pensions)

  • Junior ISA (if you're investing for your children)

  • General investment account (for anything above your tax-free allowances)

Some platforms do a superb job on one wrapper and a mediocre job on another. It's fine to split across two providers if it saves you meaningful money.

4. Range of investments

Platforms differ in what they let you buy. Broadly:

  • Funds (unit trusts, OEICs): pooled investments managed for you.

  • ETFs (exchange traded funds): funds that trade like shares, usually cheap and flexible.

  • Individual shares: UK, US and sometimes global.

  • Investment trusts: closed-end funds with their own quirks.

  • Bonds and gilts: on some platforms only.

For most beginners, any platform that offers a decent range of funds and ETFs is more than enough. Worrying about niche assets before you've bought your first index fund is classic overthinking.

5. Minimum investment amounts

Some platforms require a minimum lump sum to start (£500, £1,000, sometimes more). Others let you start with £1 or £25. If you're just beginning, pick one with a low or zero minimum so you don't have to wait months to get going.

The lowest minimum is the one that actually gets you started.

6. The user experience

This matters more than people admit. If the app is confusing, you'll avoid using it, which means you won't review your portfolio or set up automation. An ugly-but-powerful platform is fine for experienced investors. A clean, friendly app is probably the right call for a first-timer.

Things worth checking before committing:

  • Can you set up a regular monthly contribution in under a minute?

  • Does the app show you your performance clearly, or hide it behind ten menus?

  • Is customer support reachable (email, chat, phone)?

  • Are their help articles actually helpful, or 40 lines of legal disclaimers?

7. Reputation and stability

Look up how long the platform has been around, how many customers it has, and recent reviews on Trustpilot and reddit. A shiny new app can be perfectly safe, but boring and old usually means proven.

Also worth knowing: your investments are held in a separate "custody" account from the platform's own money. If the platform goes bust, your shares and funds don't disappear. They're transferred to another provider. That's a deliberate bit of UK regulation, and it's one of the underrated strengths of the system.

The main UK platforms in 2026, broadly speaking

Here's how the well-known UK platforms tend to position themselves. (This isn't a ranking. It's a shape-of-the-market sketch to help you narrow down.)

  • Vanguard: cheap, simple, focused on their own funds. Great for index investors who just want a Stocks and Shares ISA or SIPP and zero complexity.

  • Trading 212: slick app, commission-free trading, offers ISA and regular investing. Popular with younger UK investors.

  • Hargreaves Lansdown: the big incumbent. Lots of features, lots of content, higher fees. Popular with people who like UK-grown brands and full service.

  • AJ Bell: similar profile to Hargreaves, usually a bit cheaper. Strong on SIPPs.

  • InvestEngine: low-cost ETF specialist. Good for hands-off investors who want a managed or DIY ETF portfolio.

  • Freetrade: app-first, simple interface, commission-free share dealing. Basic tier is cheap, premium adds features.

  • Interactive Investor (ii): flat monthly fee, so better value once your pot is large.

  • Moneybox: automates saving and investing, built around round-ups and habits. Good for people who want the whole journey simplified.

  • Nutmeg: a robo-advisor. You answer questions about risk and goals, they pick and manage the portfolio. Higher fees but very hands-off.

All of these are FCA-regulated and covered by FSCS. The "best" one depends entirely on what you want, not on which one won a blog award this year.

Matching a platform to your situation

You're a total beginner with under £5,000

Pick the one with the cleanest app, lowest minimum, and cheapest index fund options. Fees barely matter at this size, so optimise for "will I actually use it every month?". Don't waste weeks researching, just start.

You want maximum automation

Look at robo-advisors like Nutmeg, or automated savings-and-investing apps like Moneybox. You'll pay slightly more in fees in exchange for not having to decide anything yourself.

You're a DIY investor with a growing pot

Compare percentage vs flat-fee platforms and run the numbers on your actual pot size. Somewhere around £40,000 to £80,000 is usually where flat-fee starts to win.

You want to consolidate old workplace pensions

You'll need a SIPP. Pick a platform with a reputation for smooth transfers, because pension transfers can be the slowest, most admin-heavy thing you ever do.

Don't marry the platform. You're always allowed to change your mind and transfer later.

Common doubts

  • "What if I pick the wrong one?" Transferring between platforms in the UK is straightforward, and most modern providers don't charge exit fees. Wrong-but-started beats right-but-never-done.

  • "Should I use more than one platform?" Usually not at the start. Managing one account is easier than managing three. As your pot grows, it can make sense to use one for ISA and one for SIPP, for example, based on where the fees are best.

  • "What about neobanks like Monzo, Starling or Revolut?" Some now offer basic investing features. They can be a fine place to dip your toe, but for serious long-term investing, a dedicated platform usually gives you more choice and lower fund fees.

  • "Commission-free sounds too good. What's the catch?" The platform still makes money, usually from the spread (the tiny gap between buy and sell prices), FX fees on foreign shares, or premium subscriptions. That's not sinister, it's just worth knowing where the cost actually sits.

A 10-minute decision framework

If you're stuck, here's a fast decision path you can run in your head.

1. Write down how much you expect to contribute in year one. £500? £5,000? More?

2. Pick the wrapper you need: a Stocks and Shares ISA for most, a Lifetime ISA if you're saving for a first home, a SIPP if you're consolidating pensions.

3. Shortlist three platforms that offer that wrapper and are FCA-regulated.

4. Compare their percentage fee, flat fee, FX fees and dealing fees against your expected contributions. The one with the lowest combined cost for your size usually wins.

5. Download the app. If it feels friendly and you can find "set up monthly contribution" in under a minute, that's your platform.

Done. Takes under half an hour, and you're in.

Where Mona fits

Mona doesn't replace your investment platform, it sits alongside it. Mona links to your UK bank via Open Banking and helps you keep the contributions flowing on autopilot: the standing orders into your ISA or SIPP, the monthly round-ups, the habits that feed every platform on this list. The platform does the investing. Mona makes sure the pipe stays open.

This article is for education only and is not financial advice. For free, impartial guidance, MoneyHelper.org.uk (run by the UK government's Money and Pensions Service) has good comparison content, and the FCA register (register.fca.org.uk) is the tool to verify any firm before you send them money.

The bottom line

Pick a UK investment platform that is FCA-regulated, cheap enough for your pot size, offers the wrapper you need, lets you start small, and has an app you'll actually open. Ignore the rest of the noise.

The platforms most UK investors use are all safe, competitive and do roughly the same thing. The wrong platform is usually the one you never open an account with.

The perfect platform doesn't exist. The one you actually fund every month does.

Shortlist three UK platforms tonight, check each on the FCA register, open an ISA on the one that feels simplest, and set up a monthly contribution before you close the app.

Join Mona’s early access waitlist

Join the waitlist

All articles