any restrictions on transferring money from personal to business account

I’m starting a company and was wondering if I can use the income from my day job to fund my company until things are up and running. Basically I’d transfer funds from my personal account to the company account which is then used for company related expenses. Is this legal in Texas or Wisconsin? is it illegal in your state? what about EU countries?

PS: I’m open as to where the entity resides so if there are territorial differences on how the capital is provided, then I’d take the territories that allow for using personal fund through the company account of course.