CalPERS COLA — The 2% Cap and What It Costs You
The slow drift between nominal dollars and real purchasing power
CalPERS pays an annual cost-of-living adjustment (COLA) each May. For most formulas, the COLA is capped at 2% per year, regardless of how high inflation actually runs. The cap is the entire game: if inflation is at or below 2%, your purchasing power keeps up. If inflation runs above 2%, your real (inflation-adjusted) pension shrinks every year, even though the dollar amount on your check goes up.
At 3% long-run inflation — roughly the U.S. average since 1970 — the gap compounds at about 1% per year. Over a typical 25-year retirement, that's a quarter of your purchasing power, gone. The charts below project this for a typical starting monthly pension, at three different inflation assumptions.
Scenario A — $4,000/month starting, 3% inflation, 30 years
Starting $4,000/mo · 2% COLA · 3% inflation · 30-year projection
Over 30 years, your nominal monthly pension grows from $4,000 to $7,245 thanks to the 2% annual COLA. But at 3% inflation, the real (inflation-adjusted) purchasing power falls to $2,985 — a 59% loss in real terms.
Scenario B — $6,000/month starting, 4% inflation, 25 years
Starting $6,000/mo · 2% COLA · 4% inflation · 25-year projection
Over 25 years, your nominal monthly pension grows from $6,000 to $9,844 thanks to the 2% annual COLA. But at 4% inflation, the real (inflation-adjusted) purchasing power falls to $3,693 — a 62% loss in real terms.
Scenario C — $3,000/month starting, 2% inflation, 30 years
Starting $3,000/mo · 2% COLA · 2% inflation · 30-year projection
Over 30 years, your nominal monthly pension grows from $3,000 to $5,434 thanks to the 2% annual COLA. But at 2% inflation, the real (inflation-adjusted) purchasing power falls to $3,000 — a 45% loss in real terms.
What the COLA Cap Actually Pays
Each May, CalPERS calculates the COLA using the prior calendar year's CPI-U (Consumer Price Index for All Urban Consumers). The COLA is the lesser of the actual CPI change or the formula's cap (2% for most formulas). You must be retired for at least one full year before May to receive that year's COLA, which is why retirement timing relative to April matters for your first COLA.
The COLA is compounding — each year's 2% builds on the prior year's dollar amount. Over decades, that compounding does meaningful work. The problem is just that inflation compounds too, and when inflation compounds faster, the gap between nominal and real grows.
There is a separate "Purchasing Power Protection Allowance" (PPPA) that kicks in when a retiree's pension falls below 75% (or, in some cases, 80%) of its original purchasing power. This is a floor, not a continuous adjustment — most retirees never trigger PPPA because the 2% compounded COLA keeps them above the floor in moderate inflation environments.
CalPERS COLA — Frequently Asked Questions
What is final compensation?▾
Is Classic or PEPRA better?▾
What is service credit?▾
What is a replacement rate?▾
How does the 2% COLA cap affect my pension over 20 to 30 years?▾
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Related Guides
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When Can I Retire? — Eligibility by Formula
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How Much Will My Pension Be?
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Disclaimer: Projections use a fixed COLA cap and a fixed inflation assumption. Real inflation varies year to year; CPI methodology has changed over decades. Use these as directional planning tools, not as guarantees of future purchasing power.