Does Shanghai social security cap 3 points every year?

Not capped. Shanghai social security is 3 points per year, with no upper limit. The holder who works in Shanghai shall pay social insurance premiums for employees on a monthly basis in accordance with the relevant provisions of the state and this Municipality. Accumulate 3 points every 1 year, and the points are not capped. Social security needs to be paid continuously for one year before it can be scored, and it cannot be scored if it is paid off or paid back halfway.