Rate Breakdown

Property taxes in Honolulu County are calculated by multiplying the assessed value (minus exemptions) by the total local millage rate.

Planning a property purchase or managing an existing real estate portfolio in Honolulu County requires a grasp of the local tax framework. The following guide distills the essentials of property taxation, including assessment mechanics, common exemptions, payment logistics, and the appeals pathway. Each section is designed to give you a clear, actionable understanding of how your tax obligations are calculated and managed.

How Property Tax Works in Honolulu County

The County of Honolulu evaluates all real property on a **chart‑book** basis, using a standardized budgeted value list updated annually. The assessed value is the county’s estimate of a property's market worth, adjusted for any exemptions that may apply. The County’s total Millage Rate (TMR), expressed per thousand cents, is derived from the county’s general fund expenditure needs—primarily education, public safety, and infrastructure—and is applied to the assessed value to produce the tax bill. Unlike many mainland jurisdictions, Honolulu’s rate does not include separate apportionments for individual municipalities; the entire county shares a common rate.

Available Exemptions

Honolulu County offers several exemption options that can lower payable taxes for qualifying residents. These include:

• Hawaiian Homestead Exemption – reduces the assessed value of a primary residence by $20,000, with a maximum exemption of $140,000.
• Senior Citizen Exemption – for homeowners 62 years or older, providing a $10,000 reduction.
• Disability Exemption – a $10,000 reduction for those who are completely and permanently disabled.
• Veteran Exemption – veterans with active‑service lodging benefits or certain wartime service may obtain up to $10,000 off assessed value.
• Other special exemptions (e.g., for certain agricultural holdings or inhabited defense properties) may apply on a case‑by‑case basis.

Applicants can claim multiple exemptions simultaneously, but the cumulative credited amount cannot exceed the assessed value of the property.

Payment Schedule & Deadlines

Honolulu County offers a **two‑installment** payment schedule. The first installment is due by **June 15** and the second by **January 15** of the following year. Paying at both due dates avoids the 2% late fee and a 3% interest penalty that accrue on delinquent balances. Organizing a single payment in full by **March 31** will also waive the late penalty and interest. If taxpayers miss a due date, the County will automatically apply a 2% surcharge, and any unpaid amount will accrue interest at 3% per annum. Taxpayers can request the County’s electronic or paper billing system for timely reminders and can set up automatic debit with the Honolulu County Property Tax Office.

Appealing Your Assessment

Should the assessed value not reflect the true market worth, property owners may file a review request. The process consists of five straightforward steps:

• Step 1 – Verify Your Statement: Confirm the assessed value and property details on the County’s online portal.
• Step 2 – File Form 10–96 (Property Assessment Review) within 30 days of the last tax bill issuance.
• Step 3 – Provide Supporting Evidence: Submit recent sales contracts, appraisals, or comparative market analyses.
• Step 4 – Attend the Hearing: The County will schedule a hearing; bring data and witnesses to present your case.
• Step 5 – Receive the Decision: A certified review officer will issue a written decision. If the outcome is unsatisfactory, you can proceed to a formal appeal before the County of Honolulu’s Administrative Court within the specified timeframe.

Early filing and comprehensive documentation greatly improve the likelihood of a favorable reassessment.