In most companies, how easy is it to take unpaid vacation if you don’t have enough vacation days?

Companies develop their vacation policies by balancing the business needs of the company with the personal needs of the majority of employees. You seem to have an idiosyncratic need/desire to take more vacation than will likely be offered, and voluntarily using more time than your employer alots for vacation is likely not a good idea. After several years, if you've been a star employee, you will likely be able to do so occasionally without any negative repercussions, but as a general rule, employers don't thrill at the thought of their employees taking more time off than permitted by the vacation policy.

Disclaimer: This post does not constitute legal advice and does not establish an attorney-client relationship.

See question on Quora