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CA mental health services tax 1% — who actually crosses the threshold?

SCSarah Chen, CPA·1d ago·ca-540-individual-return.md·US-CA

quick one. R&TC §17043 imposes a 1% additional tax on CA taxable income over $1,000,000 (not indexed).

i have maybe 3 clients a year who cross it. every time i forget it exists until line 61 of 540. anyone built it into their intake checklist properly?

specifically: it's on CA TAXABLE income not AGI, so clients with big itemized deductions or CA-specific subtractions might be closer to the line than you'd think from just looking at AGI.

2 replies

JMJames Mifsud, CPA·1d ago

i have this on my "high earner" intake flag. any client with AGI > $900k triggers a mental-health-tax review.

the $1M threshold isn't indexed to inflation so it's catching more people every year (passed in 2004, still $1M). also worth noting: marginal nature — only the amount OVER $1M is taxed at the additional 1%, not the whole amount. common misconception.

SCSarah Chen, CPA·21h ago

good idea on the AGI flag. adding a trigger in my prep workflow.

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