Pay California corporation estimated tax (Form 100-ES)

Go to FTB Web Pay (Opens in a new tab)

Select USE WEB PAY BUSINESS

Select Entity Type, then Corporation

Enter your Entity ID

• This is your California Entity ID, not your federal EIN. If you need it, see Find your California Entity ID
• Click Log In

Enter your name

Enter the form number

• Corporations: Form 100, 100S, 100W, or 100X

For Payment Type, choose Estimated Tax Payment (Form 100-ES)

For Period, identify the period the payment covers, usually Jan 1 to Dec 31 of the tax year. For 2026:

• Period Beginning Date: Jan 1, 2026
• Period End Date: Dec 31, 2026

Click Add an estimated tax payment

Enter the payment amount

• The minimum first-quarter payment is $800, but if we told you to pay more, enter that amount

Enter the payment date

Click Continue to go back to the previous screen, then Continue again

Enter your bank information

Click Submit

Verify all your information

Enter your email address and phone number

Click Submit

Save a copy of the confirmation for your records