Many people are failing to claim their tax credits, leading taxpayers to make considerable overpayments, it has been said.
Research from unbiased.co.uk showed as much as £2.4 billion in credits will go unclaimed this year, with eight per cent of families failing to claim their child tax credit.
Furthermore, over a quarter of pensioners are not claiming what they are entitled to.
"We are urging people to get their financial planning in order and review their current situation today," said David Elms, chief executive of unbiased.co.uk, which may include going to a debt management specialist.
The website stressed that now is as good a time as any to start claiming the credits, especially with belts tightening during the credit crunch.
Research from NS&I recently showed Britons have saved an average of £86.35 each month over the last year, ending on a high of £90.12 during the winter months ending February.
Despite the current economic climate, the number of people who save money regularly each month remained constant throughout 2008 at almost half the population (47 per cent).