The Hawaii underpayment penalty is imposed when a taxpayer does not pay enough tax through withholding or estimated tax payments during the year. The penalty is based on the amount of underpaid tax and the period during which the underpayment occurred. It is computed under Hawaii estimated tax rules and applies to individuals, estates, trusts, corporations, and other applicable entities.
When the Underpayment Penalty Applies
- The penalty applies if a taxpayer does not pay sufficient tax through:
- Withholding, or
- Estimated tax payments made during the tax year.
- The penalty is generally assessed when required installment payments are not made on time or are less than the required amount.
How the Penalty Is Computed
- The penalty is calculated based on:
- The amount of underpayment for each required installment period, and
- The length of time the underpayment remained unpaid.
- Required installment amounts are determined under Hawaii estimated tax rules, which generally follow federal installment concepts.
Forms Used
- Form N-210 – Underpayment of Estimated Tax by Individuals, Estates, and Trusts
- Form N-220 – Underpayment of Estimated Tax by Corporations, S Corporations, and Partnerships
These forms are used to determine whether a penalty applies and to compute the correct amount.
Avoiding the Penalty
- Make timely estimated tax payments throughout the year.
- Ensure total withholding and estimated payments meet required thresholds under Hawaii law.
- If income is uneven, taxpayers may use the annualized income installment method (when applicable) to reduce or eliminate penalties.
Key Considerations
- An extension to file does not extend the time to pay tax owed.
- Penalty and interest continue to accrue until the tax is fully paid.
- The penalty may be reduced or eliminated if the taxpayer meets statutory exceptions or qualifies for relief under applicable rules.
Source:
Form N-11
Form N-210 Instructions – Underpayment of Estimated Tax (Individuals, Estates, Trusts)
Disclaimer: Always verify tax information with the official forms and instructions from the Hawaii Department of Taxation or the Internal Revenue Service (IRS). For specific questions about underpayment penalties, consult Form N-379’s related publications or contact the Hawaii Department of Taxation directly.