How Does CalPERS Retirement Work? Vesting, Formula, and COLA

CalPERS retirement works as a defined-benefit pension: once you qualify, you receive a guaranteed monthly check for life, and the amount is set by a formula, not by investment returns. To qualify, you generally need at least five years of CalPERS-credited service and you have to reach the minimum retirement age for your formula. Your monthly benefit is then calculated by multiplying three numbers together: your years of service, an age-based percentage called the benefit factor, and your highest average salary. Nearly 2.4 million people are covered by the system, making it the largest public pension fund in the country.¹

The details — contribution rates, formulas, and how “highest average salary” is measured — depend on when you were first hired.

Are You a Classic Member or a PEPRA Member

Every member falls into one of two categories, and the category drives your contribution rate, your retirement formula, and how your final salary is averaged. If you became a CalPERS member before January 1, 2013, and have kept continuous membership, you are a Classic member. If you first joined on or after that date, you fall under the California Public Employees’ Pension Reform Act, known as PEPRA.²

PEPRA sweeps in more people than you might expect. Even a pre-2013 member becomes PEPRA if they left public employment, had a break in service longer than six months, and were then rehired by a different CalPERS employer on or after January 1, 2013.² PEPRA members must contribute at least 50 percent of the total normal cost of their pension benefits. Classic members often pay rates set by older collective bargaining agreements.

How Long You Have to Work Before You’ve Earned a Pension

You need at least five years of CalPERS-credited service to vest. State of California Second Tier members need ten years.³ Once you are vested, you have locked in a right to a monthly pension even if you leave public service years before retirement age. The check will be smaller than if you had kept working, but it will be waiting when you reach the minimum retirement age for your formula.

Leave before vesting and your options change. You can request a refund of the employee contributions you paid in, plus interest, by submitting a Refund Election Form. Processing takes roughly 30 to 45 days.⁴ If you are married or have a registered domestic partner, they must sign the form in front of a notary. Taking the refund permanently ends your CalPERS membership and forfeits all future retirement and survivor benefits. Employer contributions are not refunded to you, and once processed, the decision cannot be reversed.

How Your Monthly Pension Is Calculated

Three factors combine to determine your monthly benefit: service credit, the benefit factor, and final compensation.⁵

Service Credit

Service credit is the total time you worked in CalPERS-covered employment, measured in years and partial years. Full-time hourly employees earn one year for every 1,720 hours worked during a fiscal year that runs July 1 through June 30. Daily-paid employees need 215 days, and monthly-paid employees need 10 full-time months.⁶ Part-time employees earn proportional credit. More years of service means a larger pension, so this is the main lever you can pull over a career.

You can also buy service credit in some situations — prior public service, certain leaves of absence, military service, Peace Corps or AmeriCorps service — or redeposit contributions you previously withdrew. The cost increases the longer you wait, because CalPERS has to account for lost investment growth.⁷

Benefit Factor

The benefit factor is a percentage of pay you earn for each year of service, and it climbs with the age you retire. Under the most common PEPRA formula for miscellaneous members, 2% at 62, you earn 2% of final compensation per year of service if you retire at 62. Retire at 65 and the factor rises to 2.3% per year. The maximum under that formula is 2.5% per year at age 67 or older.⁸ Retiring as early as 52 is allowed under this formula, but the factor drops, and the reduction is permanent.

Final Compensation

Final compensation is your highest average annual pay over a consecutive period. Classic members get the highest 12 consecutive months. PEPRA members get the highest 36 consecutive months averaged together.⁵ The three-year average tends to produce a lower number, especially if you got a big raise in your last year.

PEPRA members also face an annual cap on pensionable pay. For 2026, the limit is $159,733 if your employer participates in Social Security, or $191,679 if it does not.⁹ Salary above the cap does not count in the calculation.

An Example

The formula is service credit × benefit factor × final monthly compensation. Say you have 25 years of service, retire at 62 under 2% at 62, and your highest 36-month average works out to $6,000 per month. That is 25 × 0.02 × $6,000 = $3,000 per month before taxes. Wait until 67 with the same salary and the factor climbs to 2.5%, yielding $3,750. Those extra five years add both more service credit and a higher factor, which is why the math rewards waiting.

When You Can Retire

Your retirement formula depends on whether you are Classic or PEPRA and whether you are classified as a miscellaneous member (most administrative and general service employees) or a safety member (sworn peace officers, firefighters, and similar positions).

Classic miscellaneous formulas include 2% at 55 and 2% at 60, with a minimum retirement age of 50. The number after “at” is the age at which you earn the stated percentage per year of service.
Classic safety commonly runs 3% at 50, with a minimum retirement age of 50.
PEPRA miscellaneous is 2% at 62, with a minimum retirement age of 52.⁸
PEPRA safety is 2.7% at 57, with a minimum retirement age of 50.

Classic formulas are generally more generous because they reach their full benefit factor at a younger age. Your employer’s contract with CalPERS determines which formula applies to your position. There is no requirement to stop working at any particular age; keep working and you keep earning service credit, with the benefit factor climbing until it hits the formula’s maximum.

If a Disability Ends Your Career Early

If a permanent injury or illness keeps you from performing your job, you may qualify for disability retirement regardless of your age.¹⁰ Ordinary disability retirement covers conditions that are not job-related and requires at least five years of service credit (ten for Second Tier members). Industrial disability retirement covers job-related injuries and illnesses and has no minimum service requirement, so a relatively new employee hurt on the job is still eligible. Both types pay a monthly benefit for life or until you recover, and industrial disability payments receive different tax treatment than ordinary disability payments.

Choosing How Your Pension Pays Out

When you retire, you pick a payment structure that determines your monthly amount and what, if anything, continues to a survivor after you die. The choice is one-time and irrevocable.

The Unmodified Allowance pays the highest monthly amount because payments stop at your death; no ongoing survivor benefit is attached. The alternatives reduce your monthly check to provide for a beneficiary:¹¹

Option 2 pays your beneficiary 100% of your monthly benefit for life after your death. Your check while alive is lower than the Unmodified Allowance.
Option 3 pays your beneficiary 50% of your monthly benefit after your death. Your check while alive is higher than under Option 2 because the survivor payout is smaller.
Options 2W and 3W work the same way but add a pop-up provision: if your named beneficiary dies before you, your monthly payment increases back to the Unmodified Allowance level. Without the “W,” your reduced payment stays reduced even if your beneficiary predeceases you.

CalPERS provides personalized estimates of each option’s monthly amount when you begin the retirement process. There is also a one-time lump-sum death benefit paid to your beneficiary, in an amount that depends on your employer.¹²

What Happens After Your Pension Starts

Annual Cost-of-Living Adjustments

CalPERS applies an annual cost-of-living adjustment starting in the second calendar year after you retire.¹³ The adjustment is based on the Consumer Price Index for All Urban Consumers and cannot exceed your employer’s contracted COLA percentage, typically 2%, 3%, 4%, or 5%. When inflation runs below the cap, you get the actual inflation rate. When inflation runs above it, CalPERS banks the excess and may apply it in later low-inflation years. The COLA compounds on your base benefit.

Health Coverage and the Medicare Trap at 65

Whether your former employer contributes toward your retiree health premiums depends on your employer’s contract with CalPERS and, for state employees, a separate health vesting schedule of either 20 or 25 years. Under the 20-year schedule, you get nothing from the state below 10 years of service, 50% at 10 years, and 5% more per year until you reach 100% at 20 years.¹⁴ The 25-year schedule follows the same structure but begins at 15 years and reaches 100% at 25.

Here is where retirees get burned. If you are 65 or older and eligible for premium-free Medicare Part A, CalPERS requires you to enroll in both Part A and Part B and transfer into a CalPERS Medicare health plan. Miss the Part B enrollment when you first become eligible and CalPERS will automatically cancel your health coverage on the first day of the month after you turn 65. If Social Security later disenrolls you from Part B for nonpayment, your CalPERS Medicare health plan is canceled as well.¹⁵ Your CalPERS coverage alone is not sufficient after 65.

Taxes and Social Security

Your CalPERS pension is taxed as ordinary income at both the federal and California state level.¹⁶ Withholding comes out of each monthly payment based on the election you file. If you don’t submit one, CalPERS defaults to the single-filer, no-adjustments rate, which often withholds the wrong amount. You can update withholding through myCalPERS.

One recent change matters a lot if you also earned Social Security. The Social Security Fairness Act, signed January 5, 2025, eliminated both the Windfall Elimination Provision and the Government Pension Offset for benefits payable from January 2024 forward. If your Social Security check was previously reduced because of your CalPERS pension, the full amount has been restored with back pay to January 2024. If you never applied for Social Security because you assumed WEP or GPO would wipe it out, it is worth filing now.¹⁷

Going Back to Work After Retirement

If you return to work for any CalPERS-covered employer, strict limits apply. You cannot work more than 960 hours in a fiscal year across all CalPERS employers combined, and there are no exceptions.¹⁸ You must also wait 180 days after your retirement date before starting any post-retirement employment with a CalPERS employer.¹⁹

The type of position matters too. You can only accept a retired annuitant position. Taking a permanent, regular, seasonal, or intermittent staff job requires formal reinstatement, which stops your pension payments and puts you back into active membership. You also cannot get around the rules by being hired as an independent contractor or through a third party for positions established by statute or city charter. Violations can trigger suspension of your pension and a demand to repay benefits already received.

If Your Career Crosses Systems, or You Divorce

Move between a CalPERS-covered job and one covered by another California public retirement system and reciprocity coordinates the two.²⁰ Contributions and service credit stay in each system separately; no money transfers. But when you retire, the highest final compensation from either system can be used to calculate your benefit in both, and you must retire from both on the same date. Reciprocity can also affect your PEPRA status: pre-2013 membership in a reciprocal system, carried over without a qualifying break, may leave you classified as Classic rather than PEPRA.

If you divorce, the service credit earned during the marriage is community property, and division requires a court order. CalPERS is a governmental plan and does not follow the federal QDRO rules that apply to private-sector pensions; it will only accept its own model court orders and will reject orders written in ERISA-based language.²¹ An attorney unfamiliar with CalPERS’ requirements can easily draft an order that gets rejected and delay the process by months, so confirm your attorney has handled CalPERS divisions before.

1
CalPERS. CalPERS Facts at a Glance – Retirement Plan Members FY 2024-25
2
CalPERS. Public Employees Pension Reform Act (PEPRA)
3
CalPERS. CalPERS 101 – Your Pension and the Vesting System
4
CalPERS. Refund Member Contributions
5
CalPERS. A Benefits Guide for Public Agency Members (PUB 5)
6
CalPERS. Service Credit (Time Worked)
7
CalPERS. A Guide to Your CalPERS Service Credit Purchase Options (PUB 12)
8
CalPERS. Local Miscellaneous Member 2% at 62 Benefit Factors
9
State Controller’s Office. 2026 Annual Retirement Compensation Max FAQ
10
CalPERS. Service and Disability Retirement
11
CalPERS. Curious About CalPERS Retirement Payment Options
12
CalPERS. Post-Retirement Survivor Benefits – For Retired Members (PUB 60)
13
CalPERS. Cost-of-Living Adjustment (COLA)
14
CalPERS. Health Vesting 101
15
CalPERS. Medicare (Retirees)
16
CalPERS. Taxes and Your Pension
17
Social Security Administration. Social Security Fairness Act – Windfall Elimination Provision (WEP) and Government Pension Offset (GPO)
18
CalPERS. A Guide to CalPERS Employment After Retirement (PUB 33)
19
CalPERS. Retiree Tips – Post-Retirement Employment Rules
20
CalPERS. Reciprocity (Linking Retirement Systems)
21
CalPERS. A Guide to CalPERS Community Property