In December, the third month of the six-month adjustment period for the fourth COLA under the 2024 HRSSC Agreement, the CPI-W Unadjusted Index (1967=100) fell from last month to 944.287, which is a decrease from the September 2025 index level upon which employees received the last COLA.
If the adjustment was made based on the December 2025 Index, the adjustment would be:
| Monthly Tracking | Amount |
| Per Annum | $0.00 |
| Per Pay Period | $0.00 |
| Cents Per Hour | $0.00 |
However, the fourth COLA under the 2024 HRSSC Agreement will be based on the March 2026 Index, and would be effective May 02, 2026 (pay period 11-2026, pay date May 22, 2026).
Under the 2024-2029 HRSSC Agreement, employees accrued the following adjustments totaling $1,789.00:
| # | Amount | Effective Date | Pay Period | Pay Date |
| 1 | $374.00 | November 02, 2024 | 24-2024 | November 22, 2024 |
| 2 | $666.00 | May 03, 2025 | 11-2025 | May 23, 2025 |
| 3 | $749.00 | November 15, 2025 | 25-2025 | December 05, 2025 |
