Corporation tax, It's there at 12.5% however if you have a company like I done for last 12 years you get hit with exact same income taxes as normal employees. Revenue have angles locked down. In fact as director you loose a pile of tax credits.

But but you can give yourself a loan out of company? Nope withholding tax due on that!

Ok what about expensing everything? Don't do it, Revenue will nail you as you are guilty until you prove yourself innocent in their eyes.