Updated October 2026
The multiplier is the single biggest lever in the pension formula that isn't simply a function of how long you worked or how much you earned — and it's also the part that varies most in structure, not just in number, from state to state. This page covers the three common ways states set a multiplier, so the preset options in this site's calculator make more sense.
The simplest structure — every year of service earns the same multiplier percentage, regardless of your age or how many years you've worked. Illinois TRS's 2.2% and Georgia TRS's 2% are examples: whether it's your 1st year or your 30th, each year contributes the same percentage to your final pension. This is the easiest structure to estimate, because the multiplier in the calculator doesn't need to change based on any other input.
Some states — CalSTRS and the Massachusetts MTRS Group 1 schedule are the clearest examples — scale the multiplier up with your age at retirement, not your years of service. A teacher retiring at 55 might get a multiplier around 1.1-1.45%, while the same teacher waiting until 65 could get 2.4-2.5%, on the same years of service. This structure is a deliberate incentive to delay retirement, and it means your "multiplier" isn't a single fixed number until you've picked a retirement age.
A third structure increases the multiplier (or applies it differently) based on total years of service rather than age — for example, a lower rate for your first 20 years and a higher rate for years beyond that threshold. New York's NYSTRS Tier 6 works this way: service below 20 years accrues at one rate, and crossing the 20-year mark lifts the rate applied to your entire career, not just the additional years.
Nearly every state has reformed its pension multiplier rules at least once, almost always applying the new (typically less generous) multiplier only to people hired after a specific date. This means the "multiplier" question really has two layers: which structure type does your state use, and which hire-date tier applies to you specifically. The state-specific pages linked in this site's footer break down both layers for several major systems.
Because this calculator asks for a single multiplier number, if your state uses an age- or service-graded table, you'll need to look up the specific percentage that applies at your planned retirement age or service length first, then enter that single number. The sensitivity table that appears after you calculate is especially useful here — it shows you exactly how much retiring one year earlier or later (which may shift which row of your state's table applies to you) would move your estimated pension.
This is an educational explainer, not financial or retirement advice. Confirm your own exact multiplier structure and current rates with your state's official retirement system.