N-210: Underpayment of Estimated Tax by Individuals, Estates and Trusts (2024)
Hawaii · Hawaii DoTax · Used for tax years 2024
Hawaii Form N-210 calculates underpayments of estimated tax and any resulting penalty for individuals, estates, and trusts for 2024. It also includes an annualized income installment schedule and boxes for claiming a penalty exception or requesting a waiver.
Who files this form
Form N-210 is for individuals, estates, and trusts figuring an underpayment of estimated tax for 2024.
The form says to check the applicable boxes and file it with your tax return if:
- Box A: You were a full-year Hawaii resident in 2023, an estate for a Hawaii decedent, or a Hawaii trust; you had no 2023 tax liability; and your 2023 tax year covered 12 months. Meeting all these conditions means you do not owe the penalty.
- Box B: You request a waiver of the penalty.
- Box C: You use the annualized income installment method.
- Box D: You treat Hawaii income tax withheld from wages as paid when actually withheld, rather than equally on the payment due dates.
- Box E: At least one required installment is based on your 2023 tax, and you filed or are filing jointly for either 2023 or 2024, but not both years.
Stop rule: If line 5, your tax after credits and Hawaii withholding, is less than $500, the form says not to complete or file it. You do not owe the penalty.
When it's due
For tax year 2024, Form N-210 lists these estimated tax payment due dates:
- April 20, 2024
- June 20, 2024
- September 20, 2024
- January 20, 2025
For the 2024 penalty calculation, line 18 uses the date the underpayment was paid or April 20, 2025, whichever is earlier. This is a penalty calculation cutoff, not a filing deadline stated on the form.
What you'll need
Have the information needed for these entries ready:
- Your 2024 Form N-11, N-15, or N-40, including your name and Social Security number or FEIN as shown on the return.
- Your 2024 tax liability, credits, and Hawaii income tax withheld.
- Your 2023 income tax return for the prior-year tax amount requested on line 7.
- Estimated and other tax payment amounts, plus the dates any underpayments were paid.
If you use Schedule A, you also need income, deduction, exemption, tax, and credit information for the periods shown. Estates and trusts use taxable income without their exemption on Schedule A, line 1.
How to file
Attach Form N-210 to Form N-11, N-15, or N-40. Check the applicable boxes under “Reasons For Filing.”
If you calculate a penalty on line 21, also enter it on:
- Form N-11, line 50;
- Form N-15, line 67; or
- Form N-40, Schedule G, line 8.
The supplied form does not give a mailing address or e-file instructions.
Common mistakes
- Missing a required checkbox or attachment: The form says you must check the applicable reasons-for-filing boxes and file Form N-210 with your return.
- Continuing after the line 5 stop rule: If line 5 is less than $500, do not complete or file the form.
- Working across columns too soon: Complete lines 11 through 17 of one column before starting line 11 of the next. On Schedule A, complete lines 19 through 24 of one column before moving to the next.
- Using the individual Schedule A periods for an estate or trust: Estates and trusts must instead use period ending dates of February 28, April 30, July 31, and November 30, 2024.
- Overlooking the caution on prior-year tax: Line 7 specifically directs you to the separate instructions before entering the 2023 tax amount.
Questions people ask
Can uneven income during the year affect my penalty?
Yes. The form says the annualized income installment method may reduce one or more required installments if your income varied during the year. Check Box C and use Schedule A.
Can I request a penalty waiver?
Yes. Check Box B. The form says the Department of Taxation will waive all or part of the penalty in certain circumstances and refers you to the separate instructions for details.
What if my payments covered every required installment?
If line 10 equals or exceeds line 9 for every payment period, stop there. The form says you do not owe a penalty. It also says no penalty is owed if there are no entries on line 16.
How is the penalty calculated?
For each payment column, line 20 multiplies the number of months on line 19 by .00667 and the underpayment on line 16. Line 21 adds the results from all columns.