I'll wade in. I think the loss of tax relief is ludicrous - all businesses receive tax relief for legitimate expenses, which interest is. A bakery, with a mortgage, would receive tax relief on the interest paid on the mortgage. Or, the rental cost if it is rented etc etc. This cut to tax relief is a veiled attack on pensions, IMO. The recent governments seem obsessed with the idea that no-one (other than government employees) should be able to accumulate a "large" pension pot. As lifetime and annual allowances have been targeted for pension pots/contributions, the easiest alternative for a small investor was to transfer funds into the BTL market which functioned essentially as a self managed super fund. So they attacked this as well. Funds will now transfer to an alternative (I don't know what that will be), and sooner or later that will be targeted for additional tax revenue as well.