Cash Isa providers will finally have to display the interest rate paid on statements, while they must also speed up transfer times when savers switch accounts.
Those who don't file their tax self-assessment forms for the 2008/09 tax year by 11.59pm on 31 Jan (a Sunday) face an initial £100 penalty plus interest on late payments.
Anyone due to file an online self assessment tax return at the end of this month who's not yet registered their details should act immediately or risk a penalty.