In most or all cases I reckon that home owner mortgage interest tax relief is marginal in the greater scheme of things and not really worth worrying about. Remember that even though you are getting some tax relief on the interest component of the mortgage repayments it is limited, the mortgage repayments are out of net income (so you may be paying 20% or 42% on the full amount you pay on the mortgage and then getting 20% "back" on only a portion of that) and mortgage interest tax relief is also capped. Ultimately the mortgage repayments are a net cost to you even after tax relief so if you can afford to clear the mortgage and forego these (and mortgage protection life assurance) payments then you will be better off (assuming of course that you don't need to borrow at higher than mortgage rates in the short/medium term thereafter).