5805F: Underpayment of Estimated Tax by Farmers and Fishermen (2024)
California · FTB · Used for tax years 2024
California Form 5805F calculates underpayment of estimated tax and any related penalty for farmers and fishermen for 2024. It also includes a section to request a penalty waiver.
Who files this form
Form 5805F is for figuring underpayment of estimated tax and any related penalty for farmers and fishermen for tax year 2024.
The form says to attach it to the back of your Form 540, Form 540NR, or Form 541, even if you do not owe a penalty.
When it's due
For tax year 2024, the form uses these dates to figure the underpayment and penalty:
- January 15, 2025: Line 11 includes 2024 withholding and estimated tax payments made on or before this date. The penalty day count starts after this date.
- April 15, 2025: On line 13, enter the date the underpayment was paid or April 15, 2025, whichever is earlier.
The form does not state a separate filing deadline for Form 5805F.
What you'll need
Have these available to complete the form:
- Your 2024 Form 540, Form 540NR, or Form 541, for tax, credits, withholding, and estimated payment amounts.
- Your 2023 return, if you filed one and your 2023 taxable year was 12 months, for the prior-year tax calculation.
- Information showing estimated tax payments made on or before January 15, 2025, and when you paid any underpayment.
- Your name as shown on your return and your SSN or ITIN.
- An explanation if you are requesting a penalty waiver.
How to file
Attach Form 5805F to the back of your Form 540, Form 540NR, or Form 541, even if you do not owe a penalty.
If you calculate a penalty and are not requesting a waiver, enter it on Form 540, line 113; Form 540NR, line 123; or Form 541, line 44. Check the box on that line to show that Form 5805F is attached.
To request a waiver, check the box on Form 5805F, line 16, and provide an explanation below it. Also check the applicable box on your tax return.
The supplied form does not give a mailing address or e-file instructions.
Common mistakes
- Leaving the form off your return because no penalty is due. The form says to attach it even if you do not owe a penalty.
- Completing lines 7 through 9 without an eligible prior-year return. If you did not file a 2023 return, or your 2023 taxable year was less than 12 months, skip those lines and enter line 4 on line 10.
- Using the smaller amount on line 10 when the high-income rule applies. If California AGI is at least $1,000,000, or $500,000 for married filing a separate return, use line 4.
- Forgetting the return checkbox. The form reminds you to check the applicable box on Form 540, line 113; Form 540NR, line 123; or Form 541, line 44.
- Requesting a waiver without an explanation. Line 16 requires you to check its box and provide an explanation.
Questions people ask
When does the form say I do not owe a penalty?
You do not owe a penalty if line 6 or line 9 is less than $500, or less than $250 if married/RDP filing separately. You also do not owe a penalty if line 12 is zero or less.
What percentage of 2024 tax does line 4 use?
Line 4 multiplies the amount on line 3 by 66⅔% (.6667).
How many days do I enter if I made no estimated payment?
If you are a calendar-year taxpayer and made no estimated payment, line 14 says to enter 90 days.
Can I request a penalty waiver?
Yes. Check the box on line 16 and provide an explanation. Also check the applicable box on your tax return. The form refers to General Information E, but that information was not supplied.