An Innovative Finance ISA (IFISA) is a tax-free wrapper that holds peer-to-peer loans and debt-based securities instead of cash or shares. You lend your money directly to individuals, businesses or property developers through an FCA-regulated platform, and the interest you earn is sheltered from tax in exactly the same way a cash ISA shelters savings interest. The difference is what sits inside the wrapper: there’s no bank underneath it, no guaranteed rate, and no FSCS protection if the platform or the underlying loans fail.
That trade-off, higher potential returns for real capital risk, is the whole story of the IFISA. This guide walks through how it actually works, what the risks look like in practice, and how the ISA reforms coming in April 2027 change the maths for anyone holding one alongside a cash ISA.
What is an Innovative Finance ISA?
An innovative finance ISA is one of four main types of ISA available in the UK, alongside cash ISAs, stocks and shares ISAs and lifetime ISAs. Introduced in 2016, it lets you hold peer-to-peer loans, and more recently long-term asset funds and open-ended property funds, inside a tax-free wrapper.
You open an IFISA with a platform that’s approved by HMRC to act as an ISA manager, then choose which loans or loan pools to lend your money into. Some platforms let you pick individual loans; others spread your money automatically across hundreds of loans to reduce the impact of any single default. Either way, your return comes from interest paid by borrowers, not from share price growth or dividends.
The tax treatment is identical to any other ISA: every penny of interest earned inside the wrapper is free of income tax, with no need to declare it on a tax return. Outside an ISA, that same peer-to-peer interest would be taxed as income at your marginal rate.
Innovative finance ISAs vs cash and stocks and shares ISAs
A cash ISA holds savings and pays a set or variable interest rate with your capital effectively guaranteed, subject to FSCS deposit protection. A stocks and shares ISA holds investments like funds, shares and investment trusts, where your capital rises and falls with the market but the underlying assets are held for you by a regulated custodian.
An IFISA sits apart from both. Your return depends entirely on borrowers repaying their loans, so if a borrower or a whole platform fails, you can lose some or all of your capital, in a way that simply doesn’t happen with a cash ISA and works differently to a stocks and shares ISA. It’s also worth knowing that IFISA rates advertised by platforms (often 4% to 8%) are projected or historic returns, not guaranteed ones, so treat any headline figure the same way you’d treat a fund’s past performance.
IFISA risks: what you need to know before opening one
The single biggest thing to understand about an IFISA is that it is not covered by the Financial Services Compensation Scheme (FSCS) in the way a cash ISA is. If a bank holding your cash ISA fails, FSCS deposit protection currently covers you up to £120,000 per person, per institution, following the increase from £85,000 that took effect on 1 December 2025. Peer-to-peer loans held in an IFISA don’t get that safety net at all: if the platform or the borrower defaults, your capital is genuinely at risk.
There’s a narrower form of protection worth knowing about. Uninvested cash sitting in your IFISA account, money waiting to be lent out, may be held in a segregated bank account and could be covered by FSCS deposit protection while it sits there. Once that cash is actually lent to a borrower, the protection stops applying.
Some platforms run their own contingency or provision funds to cover missed payments or defaults, which can soften losses in practice, but these funds aren’t guaranteed to cover every loss and can run dry in a downturn. The Financial Conduct Authority requires all peer-to-peer platforms to have a wind-down plan so that, if the platform itself stops trading, an administrator continues collecting loan repayments on investors’ behalf where possible. That’s a genuine protection, but it’s not the same as getting your money back.
Liquidity: how withdrawals actually work
This is the risk most comparison articles gloss over. An IFISA is not something you can withdraw from instantly the way you can with an easy-access cash ISA. Your money is tied up in loans with fixed terms, often one to five years, so getting it back early usually means selling your position to another investor on a secondary market, if the platform offers one, or simply waiting for the loan to mature.
In normal market conditions, a secondary market sale might take a few days to a few weeks. In a downturn, when lots of investors want out at once and fewer new lenders are coming in, withdrawal requests can take months, and some platforms have suspended withdrawals altogether during periods of stress. If you think there’s any chance you’ll need the money within the next year or two, an IFISA is the wrong place to put it.
IFISA rules for 2026/27
Any UK taxpayer aged 18 or over can open an IFISA with a registered provider. You can hold up to £20,000 across all your ISAs in the current 2026/27 tax year, and that allowance resets on 6 April each year and doesn’t carry over if unused.
A change worth knowing: you’re no longer restricted to opening just one IFISA per tax year. You can now hold multiple IFISAs with different providers in the same year, as long as your combined contributions across all ISA types stay within the £20,000 limit. That makes it easier to spread money across several platforms rather than concentrating risk with one provider.
If you’re a non-taxpayer, the tax-free status of an IFISA is less valuable to you than it is to a higher-rate taxpayer, since you wouldn’t have paid tax on that interest anyway. It’s worth weighing that up before choosing an IFISA purely for the tax wrapper.
The April 2027 ISA reforms and what they mean for IFISAs
The biggest change affecting savers and IFISA holders in the near future comes from the Autumn Budget 2025 reforms, with full technical detail confirmed by the government on 23 June 2026. From 6 April 2027, the annual cash ISA allowance for people under 65 falls from £20,000 to £12,000, according to the GOV.UK factsheet on the reforms. The overall £20,000 annual ISA allowance stays the same, but under-65s will need to put at least £8,000 of it into a non-cash ISA, meaning a stocks and shares ISA, an IFISA or a lifetime ISA, if they want to use their full allowance.
Savers aged 65 and over keep the full £20,000 cash ISA allowance, and that higher entitlement applies from the start of the tax year in which you turn 65, not your actual birthday. Money already sitting in a cash ISA before April 2027 isn’t affected; the change only applies to new contributions from that date onwards.
The new charge on cash held inside non-cash ISAs
Alongside the cash ISA cut, the government is closing what it calls a workaround. From 6 April 2027, any interest or alternative finance return paid on cash held within a stocks and shares ISA or an Innovative Finance ISA will face a flat 22% charge, according to GOV.UK. This stops savers simply parking their full £20,000 in cash inside a non-cash ISA wrapper to dodge the lower cash ISA limit.
This charge applies to everyone, including those aged 65 and over who aren’t affected by the reduced cash ISA allowance itself. If you hold uninvested cash inside your IFISA while waiting for a loan to be matched, or between the end of one loan and the start of another, any interest that cash earns during that time will be taxed at 22% once the rules take effect.
The government has also introduced transfer restrictions to prevent under-65s from moving money out of a stocks and shares ISA or IFISA into a cash ISA as a way of getting around the new lower limit. If you’re under 65 and thinking about how to structure contributions between now and April 2027, it’s worth planning ahead rather than leaving it to the last minute, since this tax year and 2026/27 are the final two years under the current, more generous cash ISA rules.
Who should consider an innovative finance ISA
An IFISA can suit an investor who already holds cash savings and a stocks and shares ISA, has money they won’t need for several years, and is comfortable that some of that capital could be lost if a borrower defaults or a platform fails. It doesn’t suit anyone building an emergency fund, since the illiquidity alone rules that out, and it’s not a simple swap for a cash ISA just because the advertised rate looks higher.
If you’re weighing an IFISA against a stocks and shares ISA, remember they carry different kinds of risk rather than one simply being “safer.” A stocks and shares ISA’s value moves with markets you can watch daily and generally sell out of within days; an IFISA’s value depends on individual borrowers you can’t easily assess, and getting out early isn’t guaranteed at all.
Given the risks and the illiquidity involved, it’s worth taking independent financial advice before committing a meaningful sum, particularly if you’re using an IFISA for money earmarked for a specific goal like a house deposit or retirement income.
FAQs
What is an innovative finance ISA?
An innovative finance ISA (IFISA) is a tax-free wrapper that holds peer-to-peer loans and other debt-based investments rather than cash or shares. You lend money to individuals, businesses or property developers through an FCA-regulated platform and earn interest that’s free from UK income tax.
Is IFISA safe?
An IFISA carries real risk to your capital because it isn’t covered by the Financial Services Compensation Scheme in the way a cash ISA is. If a borrower defaults or the platform fails, you can lose some or all of the money you’ve lent, even though the wrapper itself is tax-free.
Can you lose money in an IFISA?
Yes. Your return depends on borrowers repaying their loans, so if a borrower defaults, or the platform running your IFISA collapses without a functioning wind-down process, you could lose part or all of your original investment, not just the expected interest.
How much can I put into an IFISA?
You can hold up to £20,000 across all your ISAs in the 2026/27 tax year, split however you like between a cash ISA, stocks and shares ISA, IFISA and lifetime ISA (subject to the LISA’s own £4,000 sub-limit). From April 2027, under-65s will still have the same £20,000 total, but no more than £12,000 of it can go into a cash ISA.
Can I hold more than one IFISA?
Yes. The old rule limiting you to one IFISA provider per tax year has been removed, so you can now open IFISAs with multiple platforms in the same year, as long as your combined ISA contributions stay within the annual £20,000 limit.
How quickly can I withdraw money from an IFISA?
It varies by platform and market conditions, but it’s rarely instant. Many providers offer a secondary market where you can sell your loan position to another investor, which might take days to weeks in normal conditions, but can stretch to months, or be suspended entirely, if lots of investors want to exit at once.
Will the 2027 ISA changes affect my existing IFISA?
The core allowance changes mainly affect how much new money under-65s can put into a cash ISA from April 2027. However, if you hold uninvested cash inside your IFISA, any interest that cash earns will face a new 22% charge from April 2027, regardless of your age, according to GOV.UK’s anti-circumvention rules factsheet.
Is an IFISA better than a cash ISA?
Neither is “better” outright; they suit different needs. A cash ISA offers FSCS-protected capital and easy access, which is right for an emergency fund, while an IFISA offers potentially higher returns in exchange for real capital risk and limited liquidity, which only suits money you can afford to tie up for years.
