Update August 2018: Childcare vouchers are closing to new entrants on 4 October 2018 BUT if you're thinking of joining you must have a initial deduction taken from your salary in SEPTEMBER in order to be considered a member of your workplace's current scheme. Speak to your employer NOW!
Your employer may offer you childcare vouchers to help with your childcare costs. They could be in return for a reduction in your pay - known as a 'salary sacrifice'. Childcare vouchers may affect the amount of tax credits you can get.
On the HMRC website, there is a useful calculator which you can use to work out if you would be better off using childcare vouchers or not.