Back in August I did a worked example for calculating a nannies first pay packet - see here - since the revamp of Mumsnet, the formatting has been lost, but it may help to show expected tax, NICS and Employers NICS.
Very quickly and not very accurately, I'll see if I can work out a rough amount you need to earn, to pay a full time nanny.
Nanny works 5 days per week.
Nanny works 10 hours per day.
Nanny earns £10 per hour gross.
Nanny weekly earning £500
Nanny yearly gross pay £26000
Nannies typical net wage £19340.54
( with thanks to ListenToTaxman for PAYE calculation )
Employers NICs, £51.65 per week.
( using Table A of NICS table )
Therefore Yearly Employers NICs £2685.80
So you need to take home £26000 plus Employers NICS £2685.80 at a minimum.
For simplicity sakes, lets add on a bit so we cover any small unexpected costs, so we will call it £29000.
For a £29000 take home figure, you need to have a gross annual salary of £40000
( with thanks again to ListenToTaxman )
So yes, it is quite possible that for a full time nanny you need a salary of £45k - though it will depend on exactly how many hours you need childcare, and how much you pay the nanny! My example above shows that £40k is needed for a nanny on £26000 gross (nanny on around £7.40 net per hour, 10 hour days, 5 days per week.)