Savers have been urged to max out their allowances as the end of the tax year fast approaches. A money expert has warned you could land an "unnecessary" tax bill for £800 if you don't act now. Thomas Forrester, trainee financial planner at BRI Wealth Management , urged people as a "first priority" to use their ISA allowance, to help keep their savings growth tax-free. You can save up to £20,000 a year in ISAs, and any interest earnings or investment growth from the account is exempt from tax.