With the new tax year starting on April 6, individuals are encouraged to make timely decisions regarding their Individual Savings Account (ISA) contributions. Research from InvestEngine suggests that savers who invest the maximum allowable amount of £20,000 at the start of each tax year since 1999 could see their portfolios grow to approximately £1,277,963. In contrast, those who wait until the end of the tax year might only accumulate £1,195,127, resulting in a potential difference of £82,836 or about 6.93%. Even smaller contributions can yield significant benefits; for instance, investing £1,000 at the beginning of each tax year could lead to £129,135, compared to £122,536 for late investors. Andrew Prosser, head of investments at InvestEngine, emphasized the importance of early investment, noting that a substantial number of customers waited until the last week of the previous tax year to invest a combined £33 million. The first day of the new tax year saw £9 million invested, indicating a proactive approach among savers.