maximum amount of money in an isa
The maximum amount you can invest in ISAs this tax year (up to April 5, 2015) is Â£15,000. Remember that even though advertised returns offered by the top cash ISAs are lower than those offered by some taxable accounts, you'll usually end up with more money in your pocket with an ISA due to the tax breaks.f you've accidentally exceeded the maximum amount you can pay into an ISA in any tax year, then you won't be entitled to any tax relief on these excess payments. Don't try and put your mistake right yourself-HMRC should get in touch with you after the end of the tax year to let you know what you need to do.