Interest-rate inputs determine how expected future payments are discounted for the primary funding or accounting results, Tax-Max, and PBGC. Participant detail displays the resulting discount factor applied to each projected-year value.
Minimum Funding Interest Rate — Supplies the primary discount base for the selected funding or accounting assumption.
Maximum Funding Interest Rate — Supplies the separate discount base used for Tax-Max.
PBGC Premiums — Determines whether a PBGC result is produced and whether it uses published PBGC segment rates or the Maximum Funding Interest Rate.
Fixed Rate / Post-decrement / Post-retirement — Apply to durations 0–4, 5–19, and 20 or more years. Enter the same rate in all three fields for one level discount rate.
Published Funding Segment Rates — Uses published segment rates within the applicable 95%–105% corridor for the primary funding result. Tax-Max uses the published segment rates without the corridor, subject to dedicated uncorridored handling, and details are in IRS published segment-rate guidance.
Published Lump Sum Segment Rates — Uses the published lump-sum segment rates for the applicable lookup month, as documented in IRS published segment-rate tables.
Published Yield Curve — Uses either the IRS spot-rate curve or the selected normal or above-median FTSE spot-rate curve.
Custom Segment Rates — S1, S2, and S3 — Apply to durations 0–4, 5–19, and 20 or more years from the valuation date.
Lookback Months — Moves the lookup month for a published rate or curve back by zero through four months.
Use published segment rates (standard method) — Values PBGC vested benefits using published premium segment rates for the month immediately preceding the valuation date from PBGC guidance.
Use maximum funding rates (alternate method) — Values PBGC vested benefits using the Maximum Funding Interest Rate base and its lookback.