CalPERS works as a defined benefit pension: you and your employer put a percentage of your paycheck into a pooled, professionally invested fund, and once you’ve earned enough service credit to vest, CalPERS pays you a guaranteed monthly check for life in retirement. The size of that check comes from a formula tied to how long you worked, how old you are when you retire, and what you earned near the end of your career — not from how the market performed in any given year. So how does CalPERS work in practice, from your first day on the job through your first pension deposit? The pieces below walk through it in order.
Who Is Covered
CalPERS covers state employees, non-teaching school staff, and workers at local public agencies that contract with the system. Membership is governed by the California Public Employees’ Retirement Law in the Government Code. Full-time employees are enrolled automatically on their first day of work.
Part-time, seasonal, and intermittent workers take a longer route. You become a CalPERS member once you accumulate 1,000 hours of paid service in a single fiscal year (July 1 through June 30), with overtime and paid leave counting toward that threshold.1CalPERS. Circular Letter 200-065-14 – Common Membership Findings Found in CalPERS Public Employer Reviews Until then, you’re enrolled in the separate Part-Time, Seasonal, and Temporary Employee Retirement Plan rather than in CalPERS itself.2California Department of Human Resources. 1217 – Intermittent Employees – Human Resources Manual
How the Pension Is Funded
Three streams pay for CalPERS benefits: employee contributions, employer contributions, and investment returns on the combined pool. Investment earnings account for the largest share.
Every pay period, a percentage of your pre-tax salary is deducted for the pension. The rate depends on your classification and employer. The Public Employees’ Pension Reform Act of 2013 (PEPRA) requires new members to pay at least half of the “normal cost” — the actuarially determined annual cost of the benefits being earned that year.3California Legislative Information. California Government Code 7522 School employees hired under PEPRA contribute 8% of pay for fiscal year 2025–26; classic members at school agencies contribute 7%.4CalPERS. 2025-26 School Employer and Employee Contribution Rates State employees and local agency workers have their own rates.
Employers contribute a separate, typically larger percentage. Those employer rates aren’t fixed. CalPERS recalculates them each year through actuarial valuations and adjusts up or down to keep the fund on track. The CalPERS Board of Administration invests the pooled money globally across stocks, bonds, real estate, and other asset classes.
Vesting: When You’ve Earned a Pension
You need at least five years of service credit to vest — ten for State of California Second Tier members. Once you’re vested, your right to a monthly pension is locked in even if you leave public employment before retirement age.5CalPERS News. Your CalPERS Pension Is on a Vesting System – Here’s What That Means
Leave before five years and you have two choices. You can request a refund of your own contributions, but taking the refund terminates your CalPERS membership. If you later return to a CalPERS job, your service credit clock restarts at zero. Or you can leave the money in the account, and if you return to public employment later, your prior credit resumes where it left off.
How Your Monthly Pension Is Calculated
Your monthly CalPERS check comes from multiplying three numbers:
- Service credit — the total years, months, and partial months you worked while contributing to CalPERS.
- Benefit factor — a percentage set by your age at retirement and the formula for your job classification. The older you are when you retire, the higher this percentage, up to a cap set by your plan.
- Final compensation — the highest average annual pay over a consecutive period, either 12 or 36 months depending on your employer’s contract.
Say you retire at 62 under a 2% at 62 formula with 25 years of service and a final compensation of $80,000. Your annual pension is 2% × 25 × $80,000 = $40,000, or about $3,333 a month.
Classic Versus PEPRA Members
Which formula you use depends on when you entered the system. “Classic” members — those who joined CalPERS before January 1, 2013 — typically have more generous formulas. A classic miscellaneous (non-safety) employee might be on 2% at 55, and classic safety members such as police and firefighters often have 3% at 50, where the benefit factor tops out at 3% per year of service starting at age 50.6CalPERS. Retirement Formulas and Benefit Factors – State Safety Member – 3% at 50
PEPRA, effective January 1, 2013, set lower formulas for new members. The standard PEPRA formula for miscellaneous employees is 2% at 62, with a minimum retirement age of 52.7CalPERS. Retirement Formulas and Benefit Factors – 2% at 62 PEPRA safety members generally fall under 2.7% at 57.
What Counts as Final Compensation
Classic members may have their final compensation based on either the highest consecutive 12-month or 36-month period, depending on their employer’s contract. PEPRA members must use the highest 36-consecutive-month average.8CalPERS. 2025 Compensation Limits for Classic and PEPRA Members Final compensation includes base pay and certain special compensation like longevity pay, though the specifics vary by employer contract.
When You Can Retire
Classic members can generally retire as early as age 50 with at least five years of service. PEPRA members must be at least 52.9CalPERS. Retirement Benefits Retiring at the earliest allowed age means a lower benefit factor; waiting lifts the monthly payment up to the maximum for your formula.
If you become permanently unable to do your job because of illness or injury, you can apply for disability retirement at any age with at least five years of service credit, on medical evidence that you’re substantially unable to perform your usual duties.10Justia. California Government Code Section 21150-21176 – Disability Retirement If the condition is job-related, you may qualify for industrial disability retirement, which CalPERS reports as tax-exempt income; non-industrial disability benefits are taxed as ordinary income.11CalPERS. Disability Retirement Election Application Industrial disability retirement is primarily available to safety members.
Applying to Retire
Retiring from CalPERS requires a Service Retirement Election Application. Separating from your job alone does not retire you from the pension system. You can file up to 120 days before your planned retirement date, online through myCalPERS or on paper.12CalPERS. Service and Disability Retirement
Request a Retirement Allowance Estimate before filing so you can see what your monthly payment looks like under each survivor benefit option. Your retirement date must fall after your last day on payroll, and CalPERS must receive your application within nine months of that final day. If it arrives late, your retirement date can be no earlier than the first of the month CalPERS receives it, which can cost you months of benefits.13CalPERS. A Guide to Completing Your CalPERS Service Retirement Application (PUB 43) After processing, CalPERS sends a First Payment Letter confirming your benefit amount and the date of your first deposit.
Choosing a Survivor Benefit
At retirement you choose an option that decides whether and how much of your monthly pension continues to a beneficiary after your death. The main choices:
- Unmodified allowance: you receive the full pension for life, with only a modest continuance (if any) to a survivor.
- 100% beneficiary option: you take a reduced monthly pension for life, and your named beneficiary receives 100% of that reduced amount for their lifetime after your death.
- 50% beneficiary option: a smaller reduction to your pension for life, with your beneficiary receiving 50% of your reduced amount after your death.
- Flexible option: a customized arrangement with a beneficiary percentage you choose.
Every option that leaves more to a survivor requires a bigger cut to your own monthly check.14CalPERS. Post-Retirement Survivor Benefits – For Retired Members A separate lump-sum death benefit of $500 to $5,000, set by your employer’s contract, is paid to your designated beneficiary.15CalPERS. Post-Retirement Lump-Sum Beneficiary Designation
Cost-of-Living Adjustments
CalPERS pensions get an annual cost-of-living adjustment tied to the Consumer Price Index for All Urban Consumers, measured from your retirement date. The actual increase is capped by your employer’s contract — typically 2%, 3%, 4%, or 5%. Most state agencies and all school employers contract for a 2% cap.16CalPERS. Cost-of-Living Adjustment (COLA)
Each year CalPERS compares actual inflation to your cap and applies whichever is lower. When inflation runs below your cap, the unused portion accumulates in a “COLA bank” that can be tapped in later years when inflation exceeds the cap.
Health Coverage and Medicare in Retirement
CalPERS coordinates health insurance for retirees and dependents, but only if your employer contracts for it. Even then, how much your former employer contributes to your premium depends on a health vesting schedule that’s separate from pension vesting.
Most state employees are on either a 20-year or 25-year health vesting schedule. Under the 20-year schedule, there’s no employer contribution until 10 years of service, where you’re 50% vested; each additional year adds 5%, reaching 100% at 20 years. The 25-year schedule starts partial vesting at 15 years and reaches full at 25.17CalPERS PERSpective. Health Vesting 101 Some CSU employees and judicial branch workers have a shorter 10-year vesting requirement.18CalPERS. CalPERS Health Program Guide
At 65, CalPERS requires you to enroll in Medicare Part A and Part B if you’re eligible and then transfer into a CalPERS Medicare health plan to keep your coverage. You pay the Part B premium, but state and CSU retirees enrolled in a CalPERS Medicare plan may receive reimbursement covering all or part of it. If higher-income Part B premiums (IRMAA) apply, you can request additional reimbursement by sending your Social Security Administration notice to CalPERS.19CalPERS. Medicare (Retirees) Retirees from contracting public agencies should check with their former employer, since CalPERS does not administer Part B reimbursement for those members.
Taxes and Social Security
CalPERS payments are subject to federal income tax. California does not tax CalPERS retirement income for state residents. You submit IRS Form W-4P to tell CalPERS how much federal tax to withhold. If you don’t submit the form, CalPERS withholds as if you’re single with no adjustments, which often over-withholds. You can also elect no withholding, but then you’ll likely need to make estimated tax payments.20Internal Revenue Service. 2026 Form W-4P – Withholding Certificate for Periodic Pension or Annuity Payments
Many CalPERS positions don’t pay into Social Security, and two federal provisions historically reduced any Social Security a member did earn: the Windfall Elimination Provision (WEP) cut a worker’s own benefit, and the Government Pension Offset (GPO) cut spousal or survivor benefits by two-thirds of the CalPERS pension. The Social Security Fairness Act, signed January 5, 2025, repealed both, retroactive to January 2024. Affected beneficiaries should receive a one-time payment covering the increase back to that date.21Social Security Administration. Social Security Fairness Act
Life Events That Change the Pension
Buying Additional Service Credit
You can raise your pension by purchasing credit for time not automatically counted, including prior military service, work for a public employer before it contracted with CalPERS, and redepositing contributions you previously withdrew. Cost is calculated actuarially and rises the longer you wait because interest accrues. Any purchase must be paid in full before your retirement date.22CalPERS. A Guide to Your CalPERS Service Credit Purchase Options
Reciprocity With Other California Systems
Moving between CalPERS and another California public retirement system, such as CalSTRS or a county system, can trigger reciprocity. Contributions and service credit don’t transfer; each system pays a separate benefit. But you can use the highest final compensation from either system to calculate both pensions. To establish reciprocity, you generally have to move from one system to the other without a break in service exceeding the allowable gap.23CalPERS. Reciprocity (Linking Retirement Systems)
Divorce
In California, CalPERS benefits earned during a marriage or registered domestic partnership are community property and can be divided in divorce or legal separation, with a former spouse’s share reaching up to 50% of the benefit earned during the relationship. CalPERS won’t release pension benefits to either party until the community property claim is resolved through a court-issued Qualified Domestic Relations Order.24CalPERS. Divorce and Your Pension – Facts About Community Property For retirees, CalPERS withholds half of the monthly allowance until the claim is settled, so handling this early avoids extended payment delays.
Going Back to Work
If you retire and later return to a CalPERS-covered employer, strict limits apply. You can’t work more than 960 hours in a fiscal year, and even unpaid or volunteer hours count.25CalPERS. Retired Annuitant You also have to wait 180 days after your retirement date before starting any retired annuitant employment. An exception exists if your employer certifies at a public meeting that the position is critically needed sooner, but it doesn’t apply if you received a separation incentive (“golden handshake”), where the 180-day wait is absolute. Retirees younger than their normal retirement age face an added requirement: a bona fide separation of at least 60 days between the last day of employment and the start of retired annuitant work.26CalPERS. A Guide to CalPERS Employment After Retirement (PUB 33)