How to become Isa millionaire at age 71 by saving £200 a month There are 4,850 Isa millionaires in the UK, according to official figures, and many more could be made if UK households were savvier with their cash. How to become Isa millionaire at age 71 by saving £200 a month How to become an Isa millionaire at 71 by saving just £200 a month has been revealed. There are 4,850 Isa millionaires in the UK, according to official figures, and many more could be made if UK households were savvier with their cash. The earlier you start to save, the easier it is to build up a large pot. For example, if you save just £200 a month from the age of 21 then you would become an Isa millionaire by the time you are 71. ‌ If you started saving early, the financial rewards could be substantial. For example, by saving consistently from a young age, you could contribute a total of £120,000 over time and earn a remarkable £880,000 in interest—bringing your total to £1 million. ‌ READ MORE Exactly how hot each day this week will be as 29C mini-heatwave sizzles UK However, delaying your savings journey doesn’t mean reaching millionaire status is out of reach. Starting at age 33 and putting away £500 each month could still see you hit the £1 million mark by the time you turn 71. Article continues below That said, beginning later means relying more heavily on your own contributions. Delaying your start by just 12 years—from age 21 to 33—would require you to contribute £228,000 of your own money, £108,000 more than if you had started earlier. If you wait until age 49 to begin saving, the monthly contributions needed rise dramatically. To reach £1 million by age 71, you would need to save £1,666 each month. Over those 22 years, you’d personally contribute £439,000, with the remaining £571,000 coming from interest. Even though the interest earned in this scenario is still significant, it’s roughly one-third of the interest you'd accumulate if you had started saving at age 21—demonstrating the powerful advantage of time and compound growth. Article continues below Rachel Springall, finance expert at Moneyfactscompare.co.uk, said: “It is possible to become an ISA millionaire, but it will require a strict savings regime, and consumers will need to be vigilant to watch out for stock market volatility or rate cuts.”