Just found this in a Tax Book!!
Donating through your company
If a company donates to an approved charity, the donation can be treated as a trading expense (subject to a minimum donation per charity of €250), and so will be deductible for corporation tax.
Example F: Freda owns and operates her own business through a company. The company donates €1 million to a separate charitable foundation. The company can then write this donation off as a legitimate trading expense. This will result a corporation tax saving of €125,000 (at a tax rate of 12.5%).