If you want to take the interior design licensing exam, you need to get an interior design degree. In the very least, you must complete a two year certificate in interior design and a designated amount of work experience in order to qualify for the interior design licensing exam. The amount of work experience and education you need are conversely related. Those with a four year interior design degree need less required work experience than those with a two year interior design degree in order to become a licensed interior designer. To get more information on the requirements for licensing in your state, you can refer to the National Council for Interior Design Qualifications (NCIDQ at www.ncidq.com).