CalPERS Service Credit Purchase: Eligibility, Cost, and Payment

A CalPERS service credit purchase lets an active or inactive member buy additional years of service that get added to the pension formula, which permanently raises the monthly retirement benefit. The formula multiplies your service years by an age-based factor and your highest average pay, so even one or two purchased years can shift the check meaningfully. The election is permanent once signed, the price rises the longer you wait, and the payment method you choose has tax consequences that outlast the purchase itself.

Who Qualifies to Buy

You generally need to be an active CalPERS member, meaning you currently work for a CalPERS-covered employer and contribute to the system. Inactive members who left their contributions on deposit rather than taking a refund can also qualify, provided they haven’t retired or cashed out their account.¹

Two hard limits catch people off guard. If you’re vested in the Federal Employees’ Retirement System (FERS) or the Civil Service Retirement System (CSRS), you cannot purchase service credit in CalPERS. You also cannot buy credit for any period already covered by another public retirement system, unless a reciprocal agreement applies and the proper certifications come through.¹

Classic Members and PEPRA Members

Members hired into CalPERS-covered employment before January 1, 2013 are “Classic” members. Members hired on or after that date with no prior CalPERS membership fall under the Public Employees’ Pension Reform Act (PEPRA). Most purchase categories are open to both groups, but PEPRA closed one door: Additional Retirement Service Credit (ARSC), sometimes called “air time,” is no longer available for new elections. Classic members who started an ARSC purchase before PEPRA took effect could finish paying it off, but nobody can start one now.¹

What Kinds of Service You Can Buy

CalPERS recognizes more than a dozen categories. A few show up most often.

Redeposit of withdrawn contributions. If you once left CalPERS-covered employment and took a refund, you can restore that credit by redepositing the withdrawn amount plus accrued interest. The interest can be significant after a long break, but the credit counts fully toward your formula.

Service before membership. Time you worked for a CalPERS employer before you were required to join the system — often part-time, seasonal, or temporary work that didn’t trigger automatic enrollment. Your employer verifies the dates and pay, since the cost turns on what you earned then.

Military service. Active-duty service performed before or during your CalPERS employment can be purchased. State, school, and public agency members are capped at four years, and state and school members additionally cannot buy more military years than they have CalPERS-credited years. You’ll need a DD-214 or equivalent showing active-duty dates and an honorable or general discharge.²

Peace Corps, AmeriCorps VISTA, and AmeriCorps. Federal volunteer service in these programs qualifies. Documentation of dates and completion is required.

Approved leaves of absence. Several types are purchasable:

Maternity or paternity leave, up to one year per leave, if you returned to CalPERS-covered employment and stayed at least as long as the leave lasted.³
Employer-approved unpaid leave for your own serious illness.
Temporary disability leave or a formal layoff from a CalPERS employer.

How the Cost Is Calculated

CalPERS uses two cost methods, and the one that applies depends on the category. The difference between them is the single biggest surprise members run into.

Pay Rate and Contribution Rate Method

This method applies to service before membership, temporary disability leave, layoff, and optional member service. CalPERS takes your pay rate and contribution rate on a specified date, multiplies them for the period being purchased, and adds interest. For service before membership, the anchor date is the day you became a CalPERS member. For temporary disability and layoff, it’s the date you returned to work. Because the math looks backward at historical pay, this method usually produces the more modest price.³

Present Value Method

Military service, Peace Corps and AmeriCorps service, and most leave categories use the present value method. CalPERS calculates the total increase to your lifetime retirement benefit using actuarial assumptions: your current highest monthly pay, projected retirement age, life expectancy, salary inflation, and the assumed investment return. Because the calculation prices the full projected cost of paying you a larger pension for life, it almost always comes out higher than the pay-rate method.³

Why Waiting Raises the Price

Under either method, delay costs money. With the pay-rate method, interest keeps accruing on the base cost. With the present value method, your salary usually grows each year, which inflates the projected benefit increase and therefore the purchase price. Members who buy early in their careers often pay a fraction of what colleagues pay for the same credit a decade later.

How You Can Pay

Once you sign the election, you choose the payment method. Each has trade-offs.

Lump sum. A single payment from a bank account, credit card, debit card, or rollover covers the full cost. You cannot pay more than the quoted lump-sum amount.⁴
Installments. Payroll deductions can spread the cost over up to 180 monthly pay periods, roughly 15 years. The installment amount includes a small actuarial adjustment of up to 0.5% to account for the delayed payment, under Government Code section 21050.⁵
Plan-to-plan transfer or rollover. Pre-tax funds from a 401(a), 401(k), 403(a), 403(b), governmental 457 plan, or traditional IRA can move directly to CalPERS without triggering a taxable distribution.⁴

After-tax installments can be suspended once per purchase for up to 12 months. Payments resume automatically at the end of the suspension, interest continues to accrue during the pause, and you cannot take another suspension on the same purchase for three years after payments resume.⁵ You can also cancel the remaining installment balance before retirement, but CalPERS will reduce the service credit on your account proportionally to the unpaid amount. You keep credit only for what you actually paid.

Tax Treatment

If your employer has adopted a resolution under Internal Revenue Code section 414(h)(2), you can elect pre-tax payroll deductions, which lowers your current taxable income while you pay. The trade-off is rigid. Once you elect the pre-tax option, you cannot change the number of payments, alter the deduction schedule, pay off the balance early, or switch to after-tax deductions. All state employees have access to this option; school and public agency employees need to check whether their employer participates.⁴

Lump-sum payments from your personal bank account, credit card, or debit card use after-tax dollars. CalPERS does not treat these as tax-deductible and directs members to the IRS, the California Franchise Tax Board, or a tax advisor for their specific situation.³ A rollover from a qualifying pre-tax retirement account keeps those funds tax-deferred rather than converting them into a taxable distribution.

Steps to Purchase

The fastest path starts in your myCalPERS account. Log in, go to the Retirement tab, select Service Credit Purchase, and click Search for Purchase Options. The system asks a series of questions to identify categories you may qualify for and collects employment details and service dates for the period you want to buy.¹

Some categories require certification from your employer or a reciprocal retirement agency. CalPERS notifies the agency electronically and gives it 30 days to respond. If that window closes without a response, the request expires and you’ll need to resubmit.¹ For military purchases, you upload or mail the DD-214 directly to CalPERS rather than routing through an employer.²

Once CalPERS has the documents and confirms eligibility, the cost and election details appear in your myCalPERS account within 60 days. The package shows the final price, payment options, and estimated impact on your monthly pension. You must electronically sign and submit the election before the expiration date on the package.⁶ Miss it, and the quote becomes invalid; you start over, usually at a higher price.

Before You Sign the Election

The signature is where the decision becomes permanent, and a few limits deserve a hard look before you commit.

Irrevocable and non-refundable. Once you sign, you cannot undo it. If you leave CalPERS-covered employment before retiring, you do not get back the payments already made. On an installment plan, separation means you must pay the remaining balance in full, because installments can only be collected through payroll deductions from a CalPERS-covered position. Members uncertain whether they’ll stay in California public service to retirement should weigh this seriously.³

Disability retirements are excluded. If you end up on a disability or industrial disability retirement, purchased service credit does not increase your disability allowance, and you will not receive a refund of payments made toward the purchase. The benefit is designed for service retirements.³

Community property in divorce. Service credit you purchase during a marriage or registered domestic partnership is community property in California. A divorce can result in a court order allocating a portion of that purchased credit to your former spouse, reducing what you ultimately receive.⁷

Vesting is a separate question. CalPERS requires five years of service credit to vest. Not every purchased category counts toward that threshold on its own — military service and leave-of-absence credit, for instance, add to your formula but may not satisfy vesting by themselves. If you’re short of five years, confirm with CalPERS whether the specific category you’re buying counts toward vesting before you spend the money.

1
CalPERS. Service Credit (Time Worked)
2
California Public Employees’ Retirement System. A Guide to Your CalPERS Military Service Credit Options
3
California Public Employees’ Retirement System. A Guide to Your CalPERS Service Credit Purchase Options
4
CalPERS. Payment Options
5
California Legislative Information. California Code Government Code GOV 21050
6
CalPERS. Service Credit Purchase: Could You Qualify for a Service Credit Purchase?
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CalPERS. Divorce and Your Pension Facts About Community Property