Twelve payments of £12.50 make £150, and £150 divided by 0.35% is £42,857, which is the holding above which the cap stops scaling with the client and starts costing the platform [1]. Below that line the toll is the toll; above it the marginal pound of exposure is free to hold, which is a shape aimed at people putting in thousands rather than tens of thousands. Now run the fee across the book: if one pound in every hundred of the £172bn Hargreaves Lansdown administers ended up in these notes, 0.35% on £1.72bn is about £6m a year gross, and the cap makes that an upper bound [3][2]. Against a platform whose share of direct-to-consumer assets the Boring Money Market Monitor for Q3 2025 puts at 33.6%, nearly double Interactive Investor's 17.0% (the report is quoted as calling it more than double; 33.6 over 17.0 is 1.98, so call it just short) [2][5], £6m is not the reason to do this.
The tax mechanics are the more interesting puzzle, or rather the more revealing one. In the six months between HMRC letting these notes into Stocks and Shares ISAs and then confining them to the Innovative Finance ISA, the FCA's access regime did not change at all [4][11]. CryptoUK's objection is about usage rather than principle: on its figures, around 15 million Britons subscribed to an ISA in 2023-24 while the IFISA is used by well under 1% of ISA holders, which puts the already-open sheltered pool below 150,000 accounts [12][3]. So look at which wrappers Hargreaves Lansdown actually priced. A Fund and Share Account and a SIPP [5], with no ISA in the fee note, at a firm that also runs the country's most-used self-invested personal pension [13]. The wrapper doing the tax work here is the pension, not the ISA the FCA's opening was supposed to reach.
What the buyer owns is a debt security whose issuer holds the coins in custody [4], so the issuer's balance sheet sits between the client and the price, uncovered by the compensation scheme [8]. This is probably wrong, but I read the launch as retention priced as a product: clients could get this exposure elsewhere, and a platform with a third of the market would rather charge them per trade than watch the balance walk [6]. The counter-thesis is that dealing is the business and volatility supplies the turnover, since £3.95 on a £500 trade is 0.79% and a £6.95 round trip on the same £500 is 2.78% [6], which beats 0.35% a year by some distance. Third reading, less fun: the notes are a compliance exercise, sat inside an Advanced Investing hub behind a warning to be prepared to lose everything [7], designed to be found rather than sold. If the money arrives mostly inside the SIPP, I have the wrapper story backwards and the IFISA reclassification never mattered much.
