Take control of your financial future with award winning, low-cost investing. 

ii Mimik Partnership

Who are ii? 

interactive investor is an award-winning investment platform that puts you in control of your financial future. 

We have been helping investors for 30 years, through market highs and lows offering high quality content and impartial insights. We’re now the UK’s number one flat-fee investment platform, with assets under administration over £70 billion and over 430,000 customers. 

For a simple, flat monthly fee we provide a secure home for your pensions, ISAs and investments. We offer one of the widest ranges of investments on the market including shares, funds, trusts and ETFs.  

We also bring you impartial, expert content from our award-winning financial journalists, highly engaged community of investors, and daily newsletters and insights. 

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Why choose ii? 

Whether you are looking for a general trading account, an ISA or a SIPP, we’ve got you covered with a low, flat fee. 

  • We're trusted by over 420,000 investors 
  • Rated 4.7/5 with 22,000+ reviews on Trustpilot 
  • More than 50% of our customers have been with us for more than 10 years 
  • 1 in 4 UK share trades are executed on the ii platform 
  • Our average hold time with our customer service team is under a minute 
ISA Trading Comparison

We've crunched the numbers If you invested in both our Trading Account (General Investment Account) and ISA, after 30 years you could be better off by £45k. That's more than £1,000 difference a year, just for using us over another platform. Lots of things can affect your final figure. But the lower the fees, the more money you'll keep for yourself. This is just for illustration if all other factors were the same. Don't just take our word for it: check our working out here. 

Join ii with a SIPP, ISA or Trading Account 

SIPP. 

A SIPP (Self Invested Personal Pension) is a long-term investment with important tax benefits. Every contribution you make to your SIPP will receive a boost in the form of tax relief.  

You can invest up to 100% of your annual earnings (capped at £60,000). Once you reach 55 (57 from 2028) you can access our full range of flexible retirement options. 

Open a SIPP

ISA.

An ISA allows you to invest up to £20,000 a year without paying tax on your gains. You can access your money at any time.  

Many people start with an ISA for the tax benefits, and then move on to a Trading Account for the rest of their investing. 

Open an ISA

Trading Account. 

A Trading Account gives you the flexibility to invest on your terms.

There is no upper limit on how much you can invest, and you can withdraw your funds at any time. However, they do not have the tax advantages of an ISA. 

Open a Trading Account
Phone

Have a question about our SIPP? Call us on 0345 646 2390.

8:30am to 5pm - Monday to Friday. Or you can send an email to welcometeam@ii.co.uk.

Get a cashback boost with ii

Put a spring in your step – enjoy up to £250 cashback when you join ii this April.

  • £100 cashback when you open an ii ISA or Trading Account
  • £250 cashback when you open an ii Personal Pension (SIPP)

Offer ends 30 April 2025. New customers only. Minimum deposit required. Subject to holding period. Terms and fees apply.

Get your cashback
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Check before you transfer​​

A SIPP is for those wanting to make their own investment decisions when saving for retirement. As investment values can go down as well as up, the amount you retire with could be worth less than you invested. Usually, you won’t be able to withdraw your money until age 55 (57 from 2028).

Before transferring your pension, check if you’ll be charged any exit fees and make sure you don't lose any valuable benefits such as guaranteed annuity rates, lower protected pension age or matching employer contributions. If you’re unsure about opening a SIPP or transferring your pension(s), please speak to an authorised financial adviser. Don’t transfer just to qualify for the offer, and don't rush any decision to meet the offer deadline. We periodically run offers, and there will likely be other opportunities in the future.

Open an account

Whether you are looking for a general trading account, an ISA or a SIPP, we’ve got you covered with a low, flat fee.

SIPP.

Take control of your pension with our £5.99 a month Which? Recommended SIPP.

Open a SIPP

ISA.

Make the most of your £20,000 tax-free savings allowance with our award-winning Stocks & Shares ISA.

Open an ISA

Managed ISA.

Let us manage your ISA for you. Save time, leave it to the experts and feel confident in your investment goals – all for a low monthly subscription.

Open a Managed ISA

Trading.

Our flexible account, where you can invest in all markets in the way you want.

Open a Trading Account

Important information - the value of your investments may go down as well as up. You may not get back all the money that you invest. Investing in emerging markets involves different risks from developed markets. In many cases the risks are greater. The value of international investments is affected by currency fluctuations which might reduce their value in sterling. The selection of these funds does not constitute a personal recommendation. We have not assessed your personal circumstances or preferences.