Regarding salary requirement for extension of Tier 2 visa

Hi
I am Tier 2 General visa and my extension is due next year September 2022. Can you plz suggest when should I increase my salary to required salary-either 6 months , 3 months or now.

Ignore the previous question plz

Hi
I am currently on Tier 2 General visa and my extension is due next year September 2022. As it’s my first extension so There should be some specific salary requirement for that. So Can you plz suggest when should I increase my salary to required salary-either 6 months before , 3 months before or from now.

I’ll really appreciate any advice

Thanks