How long to prepare for MBA interview

How long to prepare for the interview depends on how well you know your story. Assuming you took your time to write your essays you should know your story by heart. Now it is all about finding examples for the most common mba interview questions.

You can increase the quality of your responses by adding an "... for example ...." to each of your answers! Examples are king and the more you can give the more credible and convincing your answer will be"

So the how long it will take you to prepare for an MBA interview depends on your ability to think of examples and take aways. The more interviews you go through throughout your admissions process the ess time it will take you to prepare for each of them!

I would say you should plan between 1-2 weeks for the MBA interview preparation. Less if you are good at bringing examples and you can reuse your essays. More, if you have trouble finding examples and your work experience is rather limited.