i've employed a nanny for nearly 4 years
it has been at times a very steep learning curve for everyone - covering illness is a real headache as if she is off work, then it tends to fall to me to pick up the slack
We pay her monthly, we then are liable for her tax and NI which we pay quarterly to HMRC
another cost is the payroll company which for us is £115 per year which gets us payslips etc
also, we give her a kitty which is £20 per week but which can go up and down depending on school holidays
travel card - rarely used as she walks everywhere but still the odd £2 here and there
food - she does eat with the kids so slight increase in food bills
we paid for her to do further training which was £250 and OFSTED costs around £110 to register
the hidden costs do stack up - also, she has had pay increases along the way
it can be a really beneficial childcare option but it is pricey