Income Tax Calculator

[loosemarbles]

I know that there probably plenty of us on here who pay ourselves / partners through our businesses and/or dividends. My position is slightly more unusual, and rather than second-guessing myself, I want to see if I start the next tax year actually knowing the right balance between dividends (I'm not a majority shareholder), income through 2 different employers.

Is there an Excel calculator that factors in things such as dividends, BIK, gift aid adjustments etc?

• yes I know, 'get a good accountant', and I do have one, but I want to do the research first before asking.