Under IR35 you may have considerable extra tax and NICs to pay
for the following Reasons:
-
you have to pay tax and NIC on 95% of the company's revenues
rather than on the money which you are actually paid;
-
you cannot pay part of the profits of the company to the
shareholders as dividends; this method is not subject to NIC and can be used
to mop up the lower rate tax bands of the shareholders.

Independence has a facility which
allows you to compare the amounts payable under the two regimes.
This form allows you to compare the tax and NICs due under
the different regimes.
Simply enter the relevant figures and click on the 'calculate'
buttons.