Interactive Investor (ii) is the UK's leading flat-fee investment platform with over 500,000 customers and 90 billion pounds in assets under administration. From February 2026, the platform uses three simplified plans (Core, Plus, Premium) where a single monthly fee covers your ISA, SIPP, and GIA. The Core plan costs 5.99 pounds per month for portfolios up to 100,000 pounds. The flat-fee model makes ii particularly good value for investors with medium to large portfolios, as costs do not increase with your balance. Best suited for investors who want comprehensive investment choice, strong research tools, and the cost predictability of flat fees.
Interactive Investor at a Glance
| Feature | Details |
| Founded | 1995 (UK) |
| Customers | 500,000+ |
| Assets Under Administration | 85 billion pounds or, if you want to match another ii page: Around 85 to 95 billion pounds |
| Regulation | FCA (UK) |
| FSCS Protection | Cash held with partner banks may be protected up to 120,000 pounds per bank; investments are protected differently |
| Account Types | ISA, SIPP, Junior ISA, GIA |
| Platform Fee (Core) | 5.99 pounds/month (up to 100,000) |
| Share Dealing (Core) | 3.99 pounds per trade |
| Fund Dealing (Core) | 3.99 pounds per trade |
| Regular Investing | Free (all plans) |
| FX Fee (Core) | 0.75% |
| Investments Available | 40,000+ UK and international investment options including shares, funds, trusts and ETFs |
(Source: Interactive Investor website, FCA register, February 2026. New pricing from 1 February 2026.)
What Is Interactive Investor?
Interactive Investor (ii) is one of the UK's largest and longest-established investment platforms, founded in 1995. It manages over 90 billion pounds in assets for approximately 500,000 customers and is known for its flat-fee pricing model, which charges a fixed monthly subscription rather than a percentage of your portfolio value.
The platform offers a comprehensive range of accounts including Stocks and Shares ISAs, SIPPs, Junior ISAs, and General Investment Accounts. It provides access to one of the widest investment ranges of any UK platform, covering funds, shares, ETFs, investment trusts, bonds, and gilts.
Interactive Investor Fees (Updated February 2026)
In February 2026, Interactive Investor replaced its previous pricing tiers with three simplified plans. The key change is that a single monthly fee now covers your ISA, SIPP, and GIA together, rather than charging separately for each account type.
Subscription Plans
| Feature | Core (5.99/mo) | Plus (14.99/mo) | Premium (39.99/mo) |
| Portfolio Limit | Up to 100,000 | Unlimited | Unlimited |
| Accounts Included | ISA, SIPP, GIA | ISA, SIPP, GIA | ISA, SIPP, GIA |
| UK/US Share Dealing | 3.99 | 2.99 | 2.99 |
| Fund Dealing | 3.99 | 1.49 | Free |
| International Dealing | 9.99 | 7.99 | 5.99 |
| Free Trades/Month | None | 1 | 2 |
| FX Fee | 0.99% | First 50,000 pounds = 0.75%, over 50,000 pounds = 0.25% | 0.25% |
| Regular Investing | Free | Free | Free |
| Junior ISAs | Not included | Free (unlimited) | Free (unlimited) |
| Family Accounts | N/A | Up to 5 free | Unlimited free |
| Dividend Reinvestment | 0.75% | 0.99 | Free |
(Source: Interactive Investor website, February 2026.)
The biggest beneficiaries of the new pricing are investors who hold both an ISA and a SIPP. Previously, holding both required separate fees. Under the new structure, the 5.99 pound Core plan covers all account types together, potentially saving several hundred pounds per year compared to the old pricing.
How Interactive Investor Compares on Fees
| Platform | Monthly Fee | Share Dealing | FX Fee | Best For |
| Int. Investor | 5.99 | 3.99 | 0.99% | Flat-fee investing |
| Trading 212 | Zero | Zero | 0.15% | Zero-cost investing |
| Freetrade | Zero | Zero | 0.99% | Free ISA and SIPP |
| AJ Bell | None (0.25%) | 5.00 | 0.75% | Balanced value |
| Hargreaves L. | None (0.35%) | 6.95 | 1.00% | Research and service |
| Vanguard | None (0.15%) | Zero | Included | Vanguard funds only |
(Source: Platform websites, February 2026. See our best trading platforms UK guide.)
The flat-fee model means ii becomes progressively better value as your portfolio grows. For a 10,000 pound portfolio, the 5.99 pound monthly fee equates to 0.72% per year, which is expensive compared to Trading 212 (zero) or AJ Bell (0.25%). For a 100,000 pound portfolio, it equates to just 0.07% per year, significantly cheaper than percentage-based platforms.
What Can You Invest in on Interactive Investor?
Interactive Investor offers one of the broadest investment ranges of any UK platform. This includes over 40,000 investments covering UK and international shares, funds (OEICs and unit trusts), ETFs, investment trusts, gilts, corporate bonds, and structured products.
The platform also provides curated investment lists, including the Super 60 (a selection of funds chosen by ii's research team) and Quick-start Funds for beginners. These can help investors who want guidance on which index funds or active funds to consider.
Interactive Investor Account Types
Stocks and Shares ISA
The ii ISA is included in all plans and provides access to the full investment range with tax-free growth up to the 20,000 pound ISA allowance. Regular investing is free. The ISA is not a flexible ISA on the Core plan. See our best stocks and shares ISA guide for comparisons.
SIPP
The ii SIPP is now included within all plans at no additional cost. This is a significant improvement over the previous pricing and makes ii one of the most cost-effective SIPP providers for medium to large pension pots. For SIPP comparisons, see our best SIPP UK guide.
Junior ISA
Junior ISAs are free on Plus and Premium plans, with no platform or dealing charges. On the Core plan, Junior ISAs are not included. The Plus plan allows unlimited Junior ISAs for all your children, making it a strong option for family investing.
Managed ISA and Managed Portfolios
For investors who prefer a hands-off approach, ii offers a Managed ISA and managed pension portfolios. These are professionally managed and automatically rebalanced, with no additional account fees beyond the standard plan subscription.
Interactive Investor Research and Tools
Interactive Investor provides strong research tools, including the Super 60 curated fund list, Quick-start Funds for beginners, detailed fund factsheets and share analysis, company financials, broker forecasts, and news feeds, portfolio analysis with asset allocation and performance tracking, and an ii Community social feature for discussing investments. While not quite as comprehensive as Hargreaves Lansdown's research offering, ii provides significantly more depth than commission-free platforms like Trading 212 and Freetrade. The upcoming ii360 advanced trading platform (expected 2026) should further enhance the offering for active traders.
Interactive Investor Pros and Cons
Pros
Flat-fee pricing that becomes excellent value for larger portfolios. Single monthly fee covers ISA, SIPP, and GIA together. One of the widest investment ranges of any UK platform. Free regular investing on all plans. Strong research tools and curated fund lists. Free Junior ISAs on Plus and Premium plans. Free family accounts (up to 5 on Plus, unlimited on Premium). FCA-regulated with FSCS protection up to 120,000 pounds. Established since 1995 with over 500,000 customers.
Cons
Monthly fee of 5.99 pounds is expensive for very small portfolios (under 10,000 pounds). Share dealing at 3.99 pounds per trade is higher than commission-free platforms. No Lifetime ISA. No cash ISA. FX fee of 0.99% on Core plan is high for overseas trading. Junior ISAs not included on the Core plan. No fractional shares. Steep jump from Core (5.99 pounds) to Plus (14.99 pounds) at 100,000 pound threshold.
Who Is Interactive Investor Best For?
ii is best for investors with medium to large portfolios (30,000 pounds or more) where the flat fee represents excellent value. It is particularly strong for investors who want an ISA and SIPP on one platform with a single fee, those who value comprehensive investment choice including OEICs, bonds, and gilts, families who want to open Junior ISAs and linked accounts under one subscription, and investors who want research tools and curated fund lists.
ii is less suitable for investors with very small portfolios where the monthly fee represents a high percentage of the total, active US stock traders (due to the FX fee), and those who want the absolute lowest cost (Trading 212 and Freetrade are cheaper for small portfolios). For a direct comparison with the UK's other major platform, see our Hargreaves Lansdown vs Interactive Investor guide.
Frequently Asked Questions
Is Interactive Investor safe?
Yes.Interactive Investor is authorised and regulated by the FCA. Cash held with partner banks may be protected by the FSCS up to 120,000 pounds per bank, while investments are held separately in custody and are not covered by that same blanket figure.It has been operating since 1995 and manages over 90 billion pounds in assets.
How much does Interactive Investor cost?
The Core plan costs 5.99 pounds per month for portfolios up to 100,000 pounds. Plus costs 14.99 pounds per month, and Premium costs 39.99 pounds per month. Each plan includes an ISA, SIPP, and GIA. Share dealing is 3.99 pounds per trade on Core. Regular investing is free on all plans.
Is Interactive Investor good for beginners?
ii offers more research tools than most commission-free platforms, which can help beginners learn. However, the 5.99 pound monthly fee makes it less cost-effective for very small portfolios. Beginners with less than 10,000 pounds to invest may prefer zero-fee platforms like Trading 212. See our how to start investing UK guide.
Is Interactive Investor cheaper than Hargreaves Lansdown?
For most portfolio sizes, yes. The flat fee of 5.99 pounds per month is cheaper than HL's 0.35% fee for portfolios above approximately 20,000 pounds, and the gap widens significantly for larger portfolios. See our HL vs Interactive Investor comparison.
Does Interactive Investor offer fractional shares?
No. You must buy whole shares on ii. For fractional shares, platforms like Trading 212 and Freetrade are better options.
What is the Super 60?
The Super 60 is a curated list of funds chosen by ii's research team. It covers a range of fund types, sectors, and geographies, designed to help investors narrow down their choices from the thousands of funds available. It is not personalised advice. For low-cost fund options, see our best index funds UK guide.
Can I transfer my ISA or SIPP to Interactive Investor?
Yes. ii supports ISA and SIPP transfers from other providers, including in-specie transfers where your existing holdings are moved without selling. Transfer times depend on the outgoing provider.
Does Interactive Investor pay interest on cash?
Yes. Uninvested cash earns interest, with rates varying by plan. Interest is paid automatically and rates are published on the ii website. Rates are generally competitive with other investment platforms.
Does Interactive Investor offer a Lifetime ISA?
No. ii does not currently offer a Lifetime ISA. For LISA options, see our Lifetime ISA rules guide.
Can I buy Vanguard funds on Interactive Investor?
Yes. ii offers a wide range of Vanguard funds and ETFs. For larger portfolios (above approximately 48,000 pounds), buying Vanguard funds on ii can be cheaper than the Vanguard platform itself, due to Vanguard's minimum monthly fee of 4 pounds and ii's flat-fee pricing.
Related Reading
Hargreaves Lansdown vs Interactive Investor
Capital at risk. The value of your investments can go down as well as up. You may get back less than you invest. Tax treatment depends on your individual circumstances and may change in the future. ISA rules and allowances may also change. If you are unsure whether investing is right for you, seek independent financial advice.
