Adjusted interest rates September 2020 Tax News
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For the period January 1, 2021 through June 30, 2021, the adjusted interest rate is 3%.[1] This is the rate compounded daily that accrues with respect to various state taxes including: personal income, corporate income and franchise tax.
The rate for personal income tax overpayments for the period is 3%. The rate for corporation tax overpayments for the period is 0%.
Current and prior adjusted interest rates are available on our website. Rates for estimate penalties are also provided.
[1] Pursuant to Section 19521 (formerly 19269) of the Revenue and Taxation Code
Last updated: 09/24/2025