From my understanding the personal allowance for the 2016-2017 tax year is: £11,000 which I wouldn't pay any tax on.
I keep reading that a limited company is a better choice if you have high income. However it seems corporation tax is at 20% - so on an income of £11,000 (for example) you would actually pay more tax than a sole proprietor.
Is there any simple formula / spreadsheet I can use to determine at what amount of income it would be more effective to trade as a limited company?
I did find the following resource: https://paulbanks.org/projects/ukpaye/ However it's only available for the tax year of 2014-2015.