This is an easy to use tool to aid you in calculating the potential tax exposure you would be subject to in the unfortunate event that you are caught by IR35.
Note the calculation is an estimation only and your exact liabilities are dependent on your own personal circumstances. A series of assumptions have been made in the calculation based on a typical contractor. The calculation does not include penalties, note these can be up to 100% of your liability. The ‘+interest’ figure is based on HMRC's rate of interest, currently 2.5%.This would effectively be an APR for each year's worth of liability. Please also note that this does not take into account liabilities from travel and subsistence relief claimed. When assessing your potential liability, you should consider the amount of travel and subsistence you claim on average. Calculations are based on 2016 tax rates.