In December, the fifth month of the six-month adjustment period for the third COLA under the 2024 Agreement, the CPI-W Unadjusted Index (1967=100) decreased from November to 944.287, but still an increase over the July 2025 index point 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 | $104.00 |
| Per Pay Period | $4.00 |
| Cents Per Hour | $0.05 |
However, the third COLA under the 2024 National Agreement will be based on the January 2026 Index, and would be effective March 07, 2026 (pay period 07-2026, pay date March 27, 2026).
Under the 2024-2027 National Agreement, employees accrued the following adjustments totaling $1,206.00:
| # | Amount | Effective Date | Pay Period | Pay Date |
| 1 | $395.00 | March 08, 2025 | 07-2025 | March 28, 2025 |
| 2 | $811.00 | September 06, 2025 | 20-2025 | September 26, 2025 |
