I recently renewed Child Tax Credits. However, my new award is far less than the online calculators predicted. I used two online calculators Gov.uk and Turn2us - they both predicted nearly double the payments that I have actually been awarded by Child Tax Credit Office. I have checked and double checked and I have given the same correct information about income, family etc every time to the Tax Credit Office and in both online calculators. When I queried this with the Child Tax Credit Office (after holding on for 15mins) a very unhelpful woman told me that that's what I had been awarded based on the circumstances/income I gave (exactly the same information as I inputted into the online calculators) and would not discuss it further. I am thinking of appealing the decision and quoting the figures from the calculators but just wondered how reliable are they and has anyone else experienced this?