B26-0708

Combined Reporting Amendment Act of 2026 updates combined reporting rules for businesses in the District of Columbia.

The Combined Reporting Amendment Act of 2026 updates the District of Columbia's combined reporting rules for businesses. It defines a "combined group" and "combined return" and revises the definition of "unitary business." The bill outlines how combined groups calculate their District taxable net income, including eliminating certain items of income and applying apportionment factors. It also details how capital gains and losses are treated and how net operating losses are carried over. The bill makes conforming edits to the requirements for a "water’s edge" election.