We're just working out what the total we'll be paying our nanny will be. She will work part time for us, and part time for another family (15 hrs a week with us, 15 hrs a week with the other family). Both jobs will pay below the threshold for tax, but together they will pay above the threshold.
Who is responsible for working out the tax? Dh says it would be up to the nanny to complete a self assessment, as it's unfair that we have to pay her tax as the pay we give her is below the threshold for tax. However, I'm sure I've read loads on here about families having to split the tax free allowance. Who's right?