Calendar

Please see the generally most important dates for most of our clients.

Important Disclaimer for Context and Use

This is extremely general and does not account for shifting due dates, local matters, payroll, and much more. Below is a classic pareto principle in which we are trying to lock in about 80% of what matters most, generally.

Individuals

CA C-Corp / S-Corp / Multi Member LLC

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General Dates
Description
Individuals
CA C-Corp / S-Corp / Multi Member LLC
January 15
Payment Deadline
Q4 Fed / CA Income tax
March 15
Payment Deadline
CA S-corp / Multi Member LLC Extension filing / Pass-through entity (PTE) elective tax (AB-150 Payment) / CA LLC Tax Due payment / CA S-Corp Tax Due payment
April 01
Planning
Extension payments, filing, or target return completion
April 15
Payment Deadline
Extension filing / payment / Q1 Fed & CA estimated tax / Sole member LLC payment due
CA LLC Annual Tax payment ($800) / CA S-Corp & C-Corp Estimated Tax installment payment / C-Corp Extension filing / C-Corp Fed and CA Tax Due Payment
April 15
Planning Deadline
IRA / fixing retirement plan issues / HSA (?)    
June 01
Planning
Q2 Payment calculation as needed
June 15
Payment Deadline
Q2 Fed / CA Income tax
Pass-through entity (PTE) elective tax (AB-150 Payment) / CA LLC Annual Fee (based on income) / CA S-Corp & C-Corp Estimated Tax installment payment
July – August
Vacation
As needed planning and extended return target dates
September 01
Planning
Q3 Payment calculation as needed
September 15
Payment Deadline
Q3 Fed Income tax (no CA payment due)
September 15
Extended Filing Deadline
S-Corp / Multi Member LLC returns must be filed
October 15
Extended Filing Deadline
Returns must be filed
C-Corp returns must be filed / only for fiscal year is calendar year
November 15
Planning
Year-end planning for the current year encouraged
Pass-through entity (PTE) elective tax (AB-150 Payment)
December 15
Payment Deadline
CA S-Corp / C-Corp Estimated tax installment payment
December 31
Planning Deadline
Last day for any calendar year action

Helpful Links For Other Common Dates and Tax Matters

To make things a bit easier, we’ve compiled a list of helpful links for common dates and tax matters, focusing on California (CA) and Delaware (DE) businesses.