This bill reenacts and amends RCW 43.84.092 and creates a new treasury income account in the state treasury to receive all earnings from investments of surplus treasury balances. It directs the state treasurer to distribute earnings monthly, crediting the general fund except that a long list of specified state accounts and funds (and beneficiary accounts of certain permanent funds) receive a proportionate share of earnings based on each account’s average daily balance for the period. The bill makes procedural and financial-management changes: it authorizes the treasury income account to be used to pay or receive amounts required by the federal Cash Management Improvement Act of 1990 (CMIA), gives the Office of Financial Management authority to determine amounts due to or from the federal government and to direct transfers as needed to implement CMIA, and authorizes payments from the treasury income account for purchased banking services (subject to RCW 43.88 and except as limited by RCW 43.84.160). It requires that CMIA refunds/allocations and payments to financial institutions occur before the monthly earnings distributions, and states that such refunds and payments do not require appropriation. The section affirms compliance with Article II, section 37 of the Washington Constitution by requiring explicit statutory direction to allocate earnings. The bill includes timing provisions: several sections have expirations or effective dates tied to RCW 74.76.040 (for example, some sections expire July 1, 2028 or January 1, 2029, or when RCW 74.76.040 expires; other sections take effect when that provision expires or on specified 2028–2029 dates). The provided text is incomplete in parts: the full list of affected accounts/funds is truncated in the extracts and the content of RCW 74.76.040 (which triggers several effective and expiration dates) is not included, so some implementation details and the complete statutory text cannot be confirmed from these excerpts.

If enacted, the bill creates a single "treasury income account" to collect all investment earnings on surplus state balances, requires the state treasurer to distribute those earnings monthly, and directs that the general fund get the bulk of earnings except for a long list of specific accounts that will receive proportional shares based on their average daily balances. The account will also be used first to make required federal Cash Management Improvement Act refunds and to pay for purchased banking services, and the Office of Financial Management will determine CMIA amounts and may order transfers to implement those federal obligations; those refunds and bank payments do not need a separate appropriation and are paid before monthly distributions. The practical impacts fall heaviest on the state treasurer and OFM, which gain new operational responsibilities and likely more routine workload to calculate, transfer, and distribute earnings and CMIA adjustments; many named state accounts and funds will likely see modest new revenue streams from allocated earnings while the general fund’s monthly receipts will reflect what remains after those pre-payments and allocations. Financial institutions will be paid directly from the account for banking services, and the federal government will receive CMIA refunds from it; timing and some implementation details are unclear because several sections’ effective and expiration dates depend on RCW 74.76.040 and portions of the bill text are not included in the provided facts.