Interactive Investor review 2026: flat fees, plans and who they suit
interactive investor, usually called ii, charges a flat monthly fee instead of a percentage of what you hold. That makes it expensive for a small pot and cheap for a large one. The entry plan, Core, costs £5.99 a month and covers an ISA, a trading account and a pension together.
Capital at risk. The value of investments can fall as well as rise, and you may get back less than you put in. Tax rules depend on your circumstances and can change. This review is general information, not personal advice.
Short verdict
ii is one of the cheapest ways to hold a large ISA and pension in the UK, because the fee does not rise as your money grows. Core at £71.88 a year costs the same at £30,000 as it does at £300,000. The catch is the other end: on £5,000 that fee is about 1.4% a year, which is high. Most people with less than around £20,000 invested will pay less on a percentage-fee platform.
Plans and prices
| Plan | Monthly fee | Accounts included | UK and US share deals | Free trades | Currency fee |
|---|---|---|---|---|---|
| Core | £5.99 | Trading account, Stocks and Shares ISA, SIPP | £3.99 | None | 0.75% |
| Plus | £14.99 | As Core, plus Junior ISA | £3.99 | One a month | 0.75% on the first £50,000, then 0.25% |
| Premium | £39.99 | As Plus | £2.99 | Ten a month | 0.25% |
Regular investing is free on every plan. Part of the monthly fee covers pension administration if you open a SIPP: ii puts that portion at £2.50 on Core and £6 on Plus and Premium, including VAT. Funds also carry their own ongoing charges, paid on top.
Flat fee versus percentage: where ii wins
- £5,000 invested: Core costs £71.88 a year, about 1.44% of the pot. A 0.35% percentage platform would charge £17.50.
- £20,500 invested: roughly the break-even point against a 0.35% charge such as Hargreaves Lansdown's on funds.
- £100,000 invested: Core still costs £71.88, about 0.07%. A 0.35% charge would be £350.
Premium only pays for itself if you would otherwise buy around ten shares or ETFs a month, or if you convert large sums into other currencies. Most long-term investors who buy by monthly regular investment will not need more than Core.
How your money is protected
ii is authorised and regulated by the Financial Conduct Authority, and client investments are held separately from the firm's own money. If an authorised investment firm fails and cannot return what it owes you, the FSCS can pay up to £85,000 per person, per firm. That does not cover falls in the value of your investments. Cash held at a bank sits under a separate FSCS deposit limit of £120,000 per person, per bank, which applied from 1 December 2025.
What it does well
- Costs stay flat as you grow. The larger your ISA and pension, the more a flat fee saves.
- ISA, trading account and SIPP on one fee on Core.
- Free regular investing on all plans, which suits monthly saving.
- Predictable bills. You know the platform cost each month, whatever the market does.
Where it falls short
- Poor value on small pots. Below about £20,000, a percentage platform usually costs less.
- Junior ISA needs Plus. Adding a child's account means moving to £14.99 a month.
- You pay even when you do nothing. The fee runs every month, including months you do not invest.
- Currency fees on Core are 0.75%, which matters if you buy a lot of US shares directly.
Who it suits
Good fit: people with more than about £20,000 across an ISA and pension, especially if that figure is growing, and anyone consolidating old pensions who wants one predictable fee.
Probably look elsewhere: beginners investing small monthly amounts, who will usually pay less on a percentage-fee platform until the pot is larger. If you are not sure you are ready to invest at all, read how much emergency savings to have first.
Questions people ask about interactive investor
How much does interactive investor cost?
Core is £5.99 a month, Plus £14.99 and Premium £39.99, as of 6 October 2026. Share deals cost £3.99 on Core and Plus, and £2.99 on Premium. Regular investing is free.
Is interactive investor good for small amounts?
Usually not. On £5,000 the Core fee works out at about 1.4% a year. A percentage-fee platform is typically cheaper until you have around £20,000 invested.
Does interactive investor charge extra for a SIPP?
The SIPP is included in the monthly fee on every plan. ii says part of that fee, £2.50 on Core and £6 on Plus and Premium, covers pension administration.
Is my money safe with interactive investor?
ii is FCA-regulated and holds client investments separately from its own money. If an authorised investment firm fails, FSCS compensation is up to £85,000 per person, per firm. That does not cover investment losses.
Sources
- interactive investor, Our charges: plans, dealing, free trades, currency fees and SIPP administration. Checked 6 October 2026.
- Hargreaves Lansdown, Stocks and Shares ISA charges, for the comparison figure. Checked 6 October 2026.
- FSCS, Deposit protection limit, and what FSCS covers. Checked 6 October 2026.
Charges change. Check ii's own site before you open or transfer an account.
About this review
Slow Money Movement™ publishes general information, not personal financial advice. We are not authorised to give regulated advice. If you are unsure whether an investment or account suits you, speak to a qualified financial adviser.
© 2026 Slow Money Movement™. All rights reserved.