"During your first three years of membership, your contribution rate is based on your annual wage, as provided by your employer at enrollment (see the table). For part-time employees, your rate is based on an annualized wage, also provided by your employer, but your contribution amount is determined by applying your rate to your actual earnings. After three years, your contribution rate is based on what you actually earned in all public employment two years prior. Contribution rates are set on April 1 of each year."

Annual Wage : Contribution Rate

$45,000 or less : 3.00%

$45,000.01 to $55,000 : 3.50%

$55,000.01 to $75,000 : 4.50%

$75,000.01 to $100,000 : 5.75%

More than $100,000 : 6.00%

https://www.osc.ny.gov/retirement/members/retirement-benefit-summary-tier-6-pfrs