It depends. Are you a teenager or adult? How much do you practice? What do you practice? How do you practice? Do you have a teacher? Do you play pieces that are within your current ability, yet challenge you to learn new things?
I'm at about year three. I have no teacher. I'm in the Honors College at my university and am a chemistry student, so I have next to no time during the busy, intense school year to work on new stuff and practice every day (so I improvise, play things from memory, or sight read the odd prelude here or there, when I can). I can play Bach Inventions, Preludes from Book 1 of the WTC, Chopin easier-to-intermediate preludes, waltzes, and mazurkas, easier Scriabin, some Mozart, and other things I like, like some Stanchinsky and more contemporary things--so the level of things I play are mostly easy, with a few intermediate pieces thrown in. Pre-20th century music with left hands consisting of chords or arpeggios are easy for me, but I have difficulty with polyphonic pieces (they're hard for me to learn because both hands are so active, although once I learn them I easily get them up to speed), and pieces consisting of chords with many accidentals, contrary motion, and jumps are difficult for me. Polyrhythms are also not my strong suit--I can play a piece that is solely in one polyrhythm, like some Scriabin and a Sorabji Etude I never finished learning, but when rhythms are "normal" and then switch to a polyrhythm, or change polyrhythms, it gives me a headache.
This summer I've practiced a lot (Liszt Technical Exercises, staccato scales, arpeggios, five finger exercises running up and down every key, bits of Etudes from Busoni, Chopin, Liszt, and Scriabin for more musical practice, mostly on double notes), and my technique has been transformed. Suddenly things that have felt impossible are within sight, which is an amazing feeling. I'm focusing on Bach for the time being to focus on my flaws, but, coming up on three years, I finally feel capable of playing some of the things I want to play and like I'm on track to at some point play my dream pieces. That is probably what you should aim for in year three--the ability to play some of the easier repertoire, and enough progress to give you hope that you can play the things you really want to play.