Marin transportation tax revenue trends upward

Tax revenue is up at the Transportation Authority of Marin, but economic volatility has the agency taking a conservative approach to the budget.

Measure AA, the county’s half-cent transportation sales tax, is set to finish the 2025-26 fiscal year at $35.9 million. That’s a 1.7% increase over the previous year, better than earlier projections, said Melanie Purcell, the agency’s finance director.

Revenue is expected to climb another 1.5% next year, and continue on a 2% growth rate through 2031, according to financial forecasts.