Millions of retirees on the new state pension are warned they could be hit with unexpected tax bills in the next few years. Labour’s commitment to maintain the Conservative’s freeze on income tax personal allowance until 2028 means pensioners will face tax bills even as their payments increase under the triple lock guarantee. Analysis shows the state pension will breach the current £12,570 tax-free allowance within three years, creating an unprecedented situation where pensioners must return some of their state pension to HMRC. The new state pension is projected to rise to at least £12,578 a y…