The Tresasury-backed savings account scheme offers working people on low incomes a 50% bonus on what they save – rewarding them with 50p for every £1 they put away.
Over four years, a maximum bonus of £1,200 is available on savings of up to £2,400.
The latest figures revealed that those using Help to Save accounts are already eligible for bonuses totalling around £14m.
The Government says the accounts make saving affordable, achievable and worthwhile.
A statement said participants “now see themselves as ‘savers’ rather than ‘spenders’”.
Economic Secretary to the Treasury, John Glen MP, said: “Saving shouldn’t be seen as a luxury but as an essential part of planning for the future.
“That’s why I launched the Help to Save scheme last year, and it’s been great to see so many people using it to put money aside for themselves and their loved ones.
“Around 3.5 million people could benefit from the scheme, so if you’re eligible but haven’t yet opened an account, you should take a look.
“Saving comes with a 50% Government bonus, and even a small amount could help you to be more prepared for the future.”
He added: “It helps those on lower incomes build up a ‘rainy day’ fund, and encourages a long-term savings habit.
“How much is saved, and when, is up to the account holder, and they don’t need to pay in every month to get a bonus.”
Help to Save is available to working people on Tax Credits, or Universal Credit claimants with a minimum earned income equivalent to 16 hours per week at the National Living Wage in their last assessment period.
Account holders can save between £1 and £50 every calendar month and accounts last for four years from the date the account is opened.
After two years, savers get a 50% tax-free bonus on the highest balance they have achieved.
If they continue saving, they could receive another 50% tax-free bonus after a further two years.
On maximum savings of £2,400 over four years, the overall bonus would be £1,200.
AJ Bell has questioned the success of the Help to Save Scheme, pointing out that many people withdraw the money before savings get to significant levels and overall numbers of savers are low in comparison to the potential size of the market.