Changing districts usually changes nothing: a teacher who moves from one district to another stays in CalSTRS, and her service credit keeps stacking. The trap is changing systems. A teacher who takes a classified administrative job moves from CalSTRS to CalPERS. A district employee who jumps to the county or the city may land in CalPERS or a ’37 Act county plan. A move to a charter school can go either way depending on how the charter elected coverage — and a move to a private school leaves the public systems entirely. Each of those moves quietly resets the rules on your largest asset.
California’s public systems — CalPERS, CalSTRS, the ’37 Act county systems, UCRP — maintain a reciprocal relationship, and the first thing to understand is what it does not do: no money and no service credit transfers. You become a member of both systems, you retire from both, and you receive two separate checks. What reciprocity does move is the valuable connective tissue:
Final-compensation linkage. Each system calculates your benefit on its own service years, but with reciprocity established and a concurrent retirement (both applications, same date), your highest compensation — usually from the later, better-paid job — can be used by both systems where their rules allow. Ten years of teaching from the 2000s priced at today’s administrator salary is real money, every month, for life.
Status preservation. Enter the new reciprocal system within six months of leaving the old one, keeping your funds on deposit, and PEPRA generally treats you as a continuing Classic member — you keep your original formula generation rather than being reset as a new hire.
That is the PEPRA trap. Break the chain — a gap longer than six months, or cashing out the first account — and your next system classifies you as a new PEPRA member: the 2%-at-62 style formulas with later factor peaks, and the pensionable-compensation cap ($178,820 for CalPERS in 2026) that Classic members don’t face. One relaxed summer-into-fall sabbatical between employers can permanently downgrade every future year of service. Note also that reciprocity isn’t automatic — you request it, in writing or through your online account, for each move.
Both CalSTRS and CalPERS generally require five years of service credit to vest — to earn the right to a lifetime monthly benefit at all. At 4 years and 11 months you have contributions plus interest; at 5 years you have a pension. The difference between those two sentences, compounded over a 25-year retirement, is routinely six figures. Membership in a reciprocal system can help you meet vesting requirements across systems — one more reason to establish reciprocity properly — but if you are anywhere near the five-year line when a new offer lands, the start date is a negotiation point worth thousands per month of delay. Count your service credit before you sign anything.
When you leave, the old system will cheerfully tell you your contribution balance is refundable. For a mid-career teacher that number can look like a remodel or a year of college. Taking it is almost always the wrong move. The refund returns only your contributions and interest — you forfeit the service credit, the employer’s side of the funding, and the formula benefit those years would have paid forever. It can also break reciprocity and, along the way, trigger taxes and potentially early-withdrawal penalties if not rolled over. Both systems offer redeposit and service-purchase options for people who later regret the refund — but buying your own years back costs more the longer you wait, because the price grows with your age and salary. The right default: leave the money on deposit, stay a member of both systems, and let the two-pension structure work.
There is one account no system change can touch: your 403(b) or 457(b). It is yours regardless of which pension covers the current job, it rolls with you from district to county to city, and for mobile careers it does the quiet work of smoothing over whatever the formulas fracture — short service in one system, a PEPRA reset, an unvested stint. If your career plan includes a move, the years before the move are exactly when the 403(b)/457 contribution matters most, because it is the only part of the plan that is fully portable.
1. Identify both systems by name (CalSTRS, CalPERS, ’37 Act county, UCRP, other) — and whether the new one is reciprocal with the old.
2. Count your service credit. Within a year of the five-year vesting line? Consider timing the exit.
3. Keep the gap under six months, and leave your funds on deposit — no refund.
4. Request reciprocity with both systems in writing; keep the confirmation letter.
5. Plan to retire from both systems on the same date so the final-compensation linkage applies.
6. Keep funding the 403(b)/457 — it is the only piece that moves with you no matter what.
7. Before the switch, run both annual statements and the systems’ own calculators — and get a second set of eyes on the numbers.
If a move is on the table — or already happened — gather your annual statements from every system you have ever paid into, including the one you left at 26 and forgot. Confirm your membership status, your service credit, and whether reciprocity was ever formally established. If you took a refund years ago, price the redeposit now, not at 58. And then model the whole household — two systems, two dates, one plan. That is a thirty-minute conversation that has, more than once, changed which job offer a client accepted.