Plan-Level Offset Social Security: Why Your Pension Might Still Decrease After the GPO Repeal

The Confusion After the GPO Repeal

The Social Security Fairness Act (H.R. 82) was signed on January 5, 2025, and repealed the federal Government Pension Offset for benefits payable from January 2024 onward. Millions of public-sector survivors are now receiving Social Security benefits without those offsets for the first time. But some are seeing their state or employer pension decrease at the same time — and assuming the GPO is somehow still in effect.

It's not. What they're experiencing is a plan-level offset: a completely separate mechanism that lives inside their employer's retirement plan, not in federal law.

What a Plan-Level Offset Is

Many defined benefit pension plans — both public and private — use what's called "integration" or "coordination" with Social Security. Under these designs, the employer reduces the pension benefit by some amount tied to the employee's Social Security benefit.

This is legal under both ERISA (for private plans) and state retirement system statutes (for public plans). The Internal Revenue Code explicitly permits it. The logic from the employer's perspective: the pension and Social Security together constitute the total retirement package, so when Social Security pays more, the employer-funded piece pays less.

For a survivor whose pension plan formula offsets pension benefits based on Social Security, a restored Social Security payment can be accompanied by a lower pension amount. The plan document controls whether that happens and by how much.

Where This Shows Up Most

State teacher retirement systems. Do not assume these pensions are reduced when Social Security increases. CalSTRS says its retirement benefit is not affected by Social Security payments, and Texas TRS says its pension benefit is not affected by Social Security. The former federal GPO could reduce eligible teachers' Social Security survivor benefits; that federal offset is repealed.

Illinois SERS. For survivor benefits earned during SERS service coordinated with Social Security, SERS reduces the survivor pension by 50% of any increase in the survivor's Social Security benefit. The reduction cannot lower the SERS survivor benefit below 25% of the member's pension at death.

CSRS and FERS. Most CSRS employees were not covered by Social Security, but CSRS-Offset employees were. OPM may reduce a CSRS-Offset retiree's or survivor's annuity by the portion of Social Security based on federal service covered by both systems. For other CSRS retirees, the post-repeal increase in Social Security survivor benefits can affect calculations such as taxes, Medicare premiums (via IRMAA), and means-tested state benefits. The FERS annuity supplement is a separate OPM retirement payment for some early retirees; it generally ends when the retiree reaches age 62 and is not the Social Security survivor benefit restored by the Fairness Act.

Private-sector "integrated" plans. Some older corporate defined benefit plans use a Social Security offset formula. These are less common today but still exist among legacy plans that haven't been frozen or terminated.

How to Find Your Plan's Offset Formula

For a private ERISA-covered plan, the formula should be described in the Summary Plan Description (SPD). A plan administrator must provide the SPD to a participant or beneficiary within 30 days of a written request. Public retirement systems use their own governing plan documents, so request the plan handbook or applicable provisions from the system. Look for sections titled "Integration with Social Security," "Coordination of Benefits," or "Offset Provisions."

Key terms to search for:

• Covered compensation — an amount generally based on the 35-year average of Social Security taxable wage bases ending when you reach Social Security retirement age; a plan may use it as its integration level
• Excess plan or offset plan — the two main integration designs
• Step-rate formula — a lower accrual rate for earnings below the Social Security base

If you can't find the SPD, request it from your plan administrator or HR department. Under ERISA, they must provide it within 30 days of a written request.

What You Can Do About It

Plan-level offsets are generally not negotiable — they're baked into the plan design and apply uniformly to all participants. But you should:

1. Verify the calculation. Request a benefits recalculation letter from your plan administrator showing exactly how the offset was applied. Errors happen, especially during the transition period after the Fairness Act.

2. Check the effective date. Some plans adjust the offset prospectively (starting from the month your Social Security increases) while others may attempt retroactive adjustments. Retroactive pension reductions are legally constrained — consult your plan's anti-cutback provisions.

3. Compare total income. There is no universal net result. Compare the Social Security increase with any pension adjustment specified by the plan's formula before assuming the overall change is positive or negative.

4. Understand the tax impact. The shift from more pension income to more Social Security income changes your tax picture, since up to 85% of Social Security is taxable while pension benefits are generally taxable except for any tax-free portion based on the retiree's contributions. A small net increase in gross income might become a slightly larger net increase after taxes.

Don't Confuse This with the Federal GPO

The critical distinction: the federal GPO applied a two-thirds reduction to your Social Security check based on your government pension. It was a federal rule, administered by the SSA, and it is now repealed. Plan-level offsets go the other direction — they reduce your employer pension based on your Social Security benefit. They're governed by your plan document, not by federal Social Security law, and the Fairness Act has no authority over them.

The Social Security Survivor Benefits Navigator walks through this distinction in detail, including a Retroactive Pay Audit Worksheet to verify your SSA's calculations and flag any pension-side adjustments that look incorrect.