Depend on vs. Depending on

What is the difference between depend on and depending on?

Depend on is used as a verb.

For example:

- His success in the interview depends on the interviewer.

In this sentence depends is a verb. It is the main verb in the sentence. The subject of depends is a noun phrase, his success in interview.

Depending on is used to add on extra information to a sentence or clause.

For example:

- He could do well in the interview, depending on the interviewer.

The main verb in that sentence is could do. The subject is he. The part at the end of sentence, depending on the interviewer, gives us extra information. It is not essential for the grammar, or for the meaning.

Reference:

[1] http://ell.stackexchange.com/questions/43690/use-of-depend-on-and-depending-on