Answers · UK 2025/26
What is an Innovative Finance ISA and how risky is peer-to-peer lending inside it?
An Innovative Finance ISA (IFISA) shelters returns from peer-to-peer lending and certain crowdfunded debt investments from Income Tax and Capital Gains Tax, using your normal £20,000 annual ISA allowance -- but unlike a Cash ISA, your capital is genuinely at risk of loss if borrowers default, and IFISA investments are not covered by the Financial Services Compensation Scheme in the way bank savings are.
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An IFISA lets savers access the potentially higher returns of peer-to-peer (P2P) lending tax-free, but conflating it with the safety of a Cash ISA is a common and costly mistake. **What an IFISA actually holds** An IFISA wraps peer-to-peer loans (money lent to individuals or businesses via a P2P platform, in exchange for interest) and certain debt-based crowdfunding investments, rather than cash deposits or listed shares/funds. Any interest or capital gains earned within the IFISA are free of Income Tax and Capital Gains Tax, using up part of your overall £20,000 annual ISA allowance (which can be split across Cash ISA, Stocks and Shares ISA, IFISA and Lifetime ISA in any combination, subject to the Lifetime ISA's own separate £4,000 sub-limit). **Why it is fundamentally different from a Cash ISA** A Cash ISA holds money as a bank/building society deposit, protected up to £85,000 per person per institution under the Financial Services Compensation Scheme (FSCS) if the provider fails. An IFISA, by contrast, holds actual LOANS to borrowers -- if a borrower defaults and does not repay, you can lose some or all of the capital you lent, and this loss is NOT covered by the FSCS deposit protection scheme in the same way. Some P2P platforms offer their own contingency/reserve funds to cover a proportion of defaults, but this is a commercial arrangement by the platform, not a government-backed guarantee, and these funds can themselves run out in a bad period of widespread defaults. **How returns compare to cash savings** P2P lending typically advertises higher headline interest rates than easy access or fixed-rate cash savings, reflecting the additional credit risk being taken by the lender (you) -- but these advertised rates are usually before accounting for expected defaults, so the REALISTIC net return after bad debts can be significantly lower than the headline rate suggests, and in a weak economic period, defaults can rise sharply, reducing returns further or even producing a net loss. **Platform risk on top of borrower risk** Beyond individual borrowers defaulting, there is also a risk the P2P PLATFORM itself could fail or cease operating -- while most platforms have "wind-down" plans intending to continue collecting and distributing loan repayments even if the platform itself goes out of business, this process can be slower, less efficient, and less certain than if the platform continued operating normally. **Diversification within an IFISA** Many P2P platforms allow (or automatically apply) diversification of your investment across many small loans to different borrowers, rather than lending your full IFISA balance to a single borrower -- this can reduce (though never eliminate) the impact of any single borrower defaulting, similar in principle to not putting all your investment eggs in one basket. **Worked example** An investor puts £10,000 into an IFISA via a P2P property lending platform advertising a target return of 7% a year. Over the year, a small number of the underlying loans experience defaults or delays, and after accounting for these bad debts (even after any partial recovery through the platform's reserve fund or collections process), the investor's actual realised return for the year comes out at closer to 4.5%, all still tax-free within the IFISA wrapper -- meaningfully lower than the advertised target rate, but still potentially attractive compared with cash savings rates, depending on the investor's risk tolerance and the wider interest rate environment at the time. **Practical tip** Treat an IFISA as a genuinely different risk category from Cash ISAs -- read the specific platform's historical default rates and reserve fund coverage carefully, understand that past performance is not a reliable guide to future defaults (especially in a downturn), and only allocate money you can afford to see reduced in value, rather than treating it as equivalent to guaranteed cash savings.
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This answer is informational only and does not constitute financial, tax or legal advice. Figures are for the 2025/26 UK tax year. See our methodology and sources.