The scheme was announced by the government in the Budget 2013 and is available to almost 2 million families.
We give you the lowdown on what support will be available, plus how you can get it.
Unlike the current voucher scheme, it will not rely on your employer choosing to enrol - instead it will be available to all qualifying families.
It provides tax-free childcare support to your family if:
Both parents (or a lone parent) are in work
Both parents are not receiving support through the Childcare Element of Working Tax Credits/Universal Credit
Neither parent has an income over £100,000
Both parents earn at least £115 a week
Both parents are an employee, self-employed or on a minimum wage
One parent is in receipt of Employment and Support Allowance, or is a full time carer in receipt of Carer's Allowance, provided the other party is in work
A lone parent is in receipt of ESA or Carer's Allowance will be eligible for the scheme
Under the scheme you will pay 80% of childcare costs per eligible child, with the remaining 20% paid by the government.
The maximum amount the government will pay is £2,000, and you would have to pay in £8,000 yourself for that amount. You will be responsible for any costs over £10,000.
The scheme also covers children with disabilities until they are 17. Read our guide for more ways you can get help with the cost of childcare.
The government's contribution to childcare support will be paid directly into an online account you can open through the Gov.uk website.
You will also have to pay your contribution into this account, with the flexibility to pay in whenever you like. For every 80p you contribute, the government will add 20p.
The accounts will be run by HM Revenue & Customs alongside National Savings & Investments.
You can use the money paid into the account by you and the government to pay the registered UK childcare provider of your choice, as the new system will not be administered by employers.
You will be allowed to continue to claim under the Tax-Free Childcare scheme while you are on paid leave, including:
Maternity or Paternity leave
However, you can only claim for children eligible before you began that leave. You will not be able to claim during any unpaid leave.
You will be able to withdraw funds you have paid into the account, if needed. However, the government would then reclaim its corresponding contribution.
For example, if you withdrew £800, the government would take back £200 of the money it had added.
The Employer Supported Childcare voucher system stopped in April 2018 for anyone not already registered for it.
Parents that already claim ESC vouchers will need to choose between continuing to do so (worth up to £933 per parent) and the new childcare scheme (worth up to £2,000 per child).