From my experience across FAANG and small to mid-size startups both... (one time or per year, monthly being 1/12th the amount) A - <$2,500 B - <$20,000 C -

From my experience across FAANG and small to mid-size startups both... (one time or per year, monthly being 1/12th the amount) A - <$2,500 B - <$20,000 C - more than $20k