people say time on + pct is how long you should stay off at lest but only real way to know if your body has recoverd is to get blood work done.

1) PCT: The Rule
2) An example using a 12 week cycle protocol
3) Mathematical proof substantiating the 12 week cycle protocol
4) How many cycles you could run in a 52 week year
5) A brief analysis of hormone levels pre/post cycle

The general rule for running an AAS cycle is:

Time ON + PCT = Time off (Unless blood results prove that you have returned to natural/near natural levels)

Now, lets say you choose to indulge in a 12 week cycle, which carries a 4 week PCT, thus the total time frame where your hormone levels will be abnormal in comparison to prior natural levels is 16 weeks. Additionally, supposing that you chose against acquiring blood results, this will result in a 16 week 'time off' period. Thus, the total time frame for a single cycle to commence and be finalised is 32 weeks.

Therefore, following the aforementioned key points, on the basis of a 52 week year, one can indulge in (52/32=) 1.625 cycles a year. In Layman's terms, you can run 1 cycle completely (this includes time on + PCT + time off) + (5/8 =) 0.625 cycles. This means you can run one complete cycle (this includes: Time ON + PCT = Time off) plus another 12 week steroid cycle + 4 weeks PCT + 4 weeks time off (32*0.625) in a single year, with a remaining 12 weeks of time off period to be carried forward into the next year - (2 complete AAS cycles = [32 weeks +32 weeks] 64 weeks, -52 weeks (equal to 1 year) = 12 weeks to be carried forward).

With regard to hormone levels, following the 1.625 cycles a year, you are likely to be fine. Of course, people find that after single cycle with PCT and time off, their levels return close to natural, much in the same way in which another person may find that they will be completely reliant upon TRT/HRT after their first cycle. What i have tried to illustrate here is that everybody is different - and the assumption that the time off period will, in most cases, return an individual to 'normal' hormonal levels.