The idea of this small project is to have a quick and easy-to-use calculator for contractors working in the UK through their limited companies.

For the moment, this calculator only works with tax rules for 2016/2017 tax year, and it does not include NICs calculations.

The final goal for this tool is to be able to:

• Given a contractor's gross income, divided by dividends and salary, return the tax due following the specific year's rules.
• Calculation of tax hike for a contractor, when the new dividend tax will become active in April 2016. (Comparison of tax between 2015/16 and 2016/17 tax years)
• Given a contractor's daily rate under 2015/16 tax rules, return a daily rate that, with new rules for 2016/17, will correspond to the same net income
• Support NICs calculations
• Make a small web GUI to excersise the calculator

(todo)

This tool is provided for illustrative purposes only and all results should be used solely as a guide. For a full tax breakdown based on personal circumstances, a certified accountant should always be consulted.