We both work full time, childcare evens out over the year at £500 per month so about £6000 a year - going down to about £4500 per year soon with ds free hours kicking in.
So currently we both do childcare vouchers which saves me £70 tax and dfiance £50 tax which is about £1400 per year.
But the most we can claim back under the new system will be £1200 prob nearer £900 when it goes down - so those already with both in work will lose out - aidmmw (am I doing my maths wrong?)