Use the My Interactive Retirement Planner SM to find out how your financial decisions, assets and plan might affect your retirement. Learn about the 2025 contribution limits for different retirement savings plans including 401k, 457, 403b, 401a and IRAs.(Includes catch-up contributions). OPERS provides age and service retirement, disability benefit and survivor benefit programs for public employees throughout the state. How much do I contribute to OPERS? Find out how much you'll pay in Ohio state income taxes given your annual income. Customize using your filing status, deductions, exemptions and more. Employees can make pretax contributions on a biweekly basis up to the annual maximum contribution amounts per the chart above. Find out how much you'll pay in Ohio state income taxes given your annual income. Customize using your filing status, deductions, exemptions and more.