I take your point. But you can get circa 5% in other places and not pay a fee for it. Chase has an excellent instant-access saver at roughly 5% or a bit less. Plum has something similar. Moneybox has savings accounts with that sort of interest rate. If 3k is small change then one might argue you could leave that there in cash and let the interest net off against fees. But for me, I can just pay a much lower fee for my SIPP elsewhere and still earn 5% on cash.