Glossary • Updated 2026
Estimated Tax
Pay-as-you-go installments: California’s lopsided 30/40/0/30 pattern front-loads 70% by June.
In detail
Miss installments and underpayment penalties stack per layer (income tax + LLC fee separately).
Extensions extend filing, never payment.
Calendar April 15, June 15, January 15: September is $0 in California.
Where it matters
More definitions
Sources
- Cal. Rev. & Tax Code; 8 Del. C.; Wyo. Stat. Title 17; FTB/SOS glossaries