Advanced level???

[faa2010]

How can you know if you are at an intermediate or at an advanced level on playing piano?

[m19834]

An advanced musician will rise to the challenge.

[myriadwhims]

An advanced student would be much more independent and well-rounded than an intermediate one. 

Really though, these kinds of questions are pointless.  There's no magic point where you become advanced, it's a gradual process.  And playing a difficult repertoire doesn't really make one advanced either.

[iroveashe]

You'll hear a ring and see a sign above your head that says Level Up!

[go12_3]

How can you know if you are at an intermediate or at an advanced level on playing piano?

When a piece at the intermediate level becomes more easy to play.  I think there are different levels of Intermediate, like "early", "middle" and "late".   In order to feel competent in the advance level, you need to know all the scales in every key, play arpeggios, and chromatic scales.   It takes years to feel comfortable at the Intermediate level before going into advanced level.  And then
it depends upon the background of piano studying and playing. 

[gyzzzmo]

Advanced players don't have to worry about notes in intermediate pieces anymore.

[mezzo piano]

Advanced players have paying gigs.

[invictious]

Advanced players can play Chopin Etude Op.10 No.4 under one minute.

Cheers.

[donnxavier]

If you can play four or five Chopin Études flawlessly you then can consider yourself "advanced" i.e., grade 8+.

[DF_pianostreet DF_pianostreet]

If you have to ask then I'd guess you're probably intermediate.  Of course it depends on your measurement device... some classically advanced pianists are just beginners when it comes to jazz for example.

[jbmorel78]

If you can play four or five Chopin Études flawlessly you then can consider yourself "advanced" i.e., grade 8+.

Is this the magic formula?

[jbmorel78]

How can you know if you are at an intermediate or at an advanced level on playing piano?

The advanced student does not ask this question - he is concerned, rather, with advancing.