IRS Issues Updated Interest Rates for Pension Plans

The latest guidance provides essential corporate bond and Treasury rate data for pension funding calculations.

Updated on Oct. 21, 2026 in Retirement Planning

Isometric editorial illustration of stacked matte geometric cubes in teal and oxblood, symbolizing the structured calculation of pension interest rates. — The IRS issued Notice 2026-65, providing updated interest rate benchmarks essential for accurate pension plan funding and benefit valuation calculations. AI Illustration. Upload story photo >

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The IRS has released Notice 2026-65, detailing updated interest rates for pension plan funding and benefit valuation. These figures include corporate bond monthly yield curves and minimum present value segment rates.

Why it matters

These IRS-mandated rates are critical for determining pension plan funding obligations and ensuring accurate benefit values for retirement systems. Proper application of these metrics helps plan sponsors maintain compliance with federal requirements.

Notice 2026-65 establishes interest rates for pension valuation, including September 2026 yield curves and October 2026 24-month averages. These figures replace prior benchmarks used for calculating mandatory funding levels.

The players

IRS

The Internal Revenue Service is the agency responsible for administering tax laws and overseeing pension regulation in the United States.

The details

The guidance specifies the 30-year Treasury weighted average interest rate and the permissible range for plan valuations. These numbers serve as the baseline for firms to calculate liability and necessary funding contributions throughout the fiscal period.

September 2026 marked the period for the monthly yield curve and segment rate establishment.
October 2026 represents the window for the 24-month average corporate bond segment rates.
The IRS issued Notice 2026-65 on October 19, 2026.

Market Dynamics

These updates follow the regulatory requirements for periodic rate adjustments established by the Pension Protection Act of 2006. The issuance demonstrates the ongoing adjustment of corporate funding benchmarks in response to prevailing macroeconomic Treasury and bond conditions.

These rates directly influence the valuation of pension plan assets, which can impact the financial health of corporate retirement accounts. Investors should note that changes in these benchmarks affect how companies report funding liabilities in their financial filings.

The takeaway

Pension plan sponsors must use these updated figures to ensure their current funding obligations remain accurate. Consulting with a qualified actuary is recommended to apply these IRS rates to specific benefit valuation scenarios.