The City and County of Honolulu values every taxable parcel each year at fair market value and taxes it according to a land-use class, so an apartment building’s bill depends as much on how the city classifies it as on what it is worth. Unlike some other Hawaii counties, Oahu has no separate apartment or long-term rental class, which makes the classification question especially important for owners.
One government, one annual assessment
Honolulu is a consolidated city and county covering all of Oahu, and its Real Property Assessment Division handles valuation island-wide. Revised Ordinances of Honolulu (ROH) § 8-7.1 directs the city to determine and annually assess the fair market value of all taxable real property using the market data and cost approaches to value, applied through systematic mass-appraisal methods.
The calendar runs on a fixed cycle, according to the division’s assessment FAQ:
- Values are set as of October 1 preceding the tax year.
- Assessment notices are typically mailed by December 15.
- The appeal window runs from December 15 through January 15.
- The tax year itself runs from July 1 through June 30.
- Home exemption claims are due by September 30 preceding the tax year.
So the notice an owner receives in December sets the value behind the bills for the fiscal year that begins the following July.
How the city decides a building’s class
Under ROH § 8-7.1, property is classified based on its highest and best use and the districting established in the city’s general plan and zoning ordinance. Oahu’s classes include Residential, Residential A, Commercial, Industrial, Hotel and Resort, Agricultural, Preservation, Public Service, Vacant Agricultural, Bed and Breakfast Home and Transient Vacation.
The class that draws the most attention is Residential A, created in 2013 and given a two-tier rate in 2017. Its definition is narrow. It covers improved residential parcels with no more than two single-family dwelling units, an assessed value of $1,000,000 or more and no home exemption, in specified residential zones; vacant land in those zones valued at $1,000,000 or more; and condominium units valued at $1,000,000 or more without a home exemption.
A conventional walk-up or mid-rise with several rental units on one parcel falls outside that definition. Owners of small properties should still check: a lot with two houses, or individually owned condominium units held as rentals, can land in Residential A once value crosses the threshold.
The rates behind the bill
Rates are set per $1,000 of net taxable value and are adopted by the City Council each year. The city’s fiscal year 2025–26 rate table listed, among others:
- Residential: $3.50
- Residential A: $4.00 on the first $1,000,000 and $11.40 on value above that
- Commercial and Industrial: $12.40
- Hotel and Resort: $13.90
- Transient Vacation: $9.00 on the first $800,000 and $11.50 above that
The proposed rate resolution for fiscal year 2026–27, Resolution 26-62, left the Residential and Commercial rates unchanged at $3.50 and $12.40. Because rates can change every spring, the current year’s resolution is the number to use when estimating a bill.
The spread between classes is the reason classification deserves attention. At the fiscal 2025–26 rates, $5 million of net taxable value would carry roughly $17,500 in tax at the Residential rate versus $62,000 at the Commercial rate. A mixed-use building with ground-floor retail, or an apartment property on commercially zoned land, should be reviewed with that gap in mind.
No rental class on Oahu
Statewide rate tables show that Hawaii’s other counties use classes Oahu does not. Hawaii County, for example, lists an Apartment class with its own rate. Honolulu’s ordinance has no long-term rental or apartment class and no rate discount for renting to residents, so a long-term rental is taxed under the same Residential or Residential A tests as any other home.
That also means the homeowner exemption, which only owner-occupants can claim, is not available to investors. Underwriting should use the full net taxable value.
Appealing a value
Owners who disagree with an assessment file with the city’s Board of Review, an independent five-member panel, by January 15. Per the city’s appeals brochure, accepted grounds include an assessed value that exceeds fair market value by 10% or more, a lack of uniformity due to error or improper method, and denial of an exemption the owner was entitled to. Each appeal requires a $50 deposit, refunded if the appeal succeeds in whole or in part, and the Board issues a decision within 60 days of the hearing. Owners dissatisfied with the result can take the case to Hawaii’s Tax Appeal Court.
What Oahu owners can do with this
A few habits keep property tax predictable:
- Confirm each parcel’s class on the December notice, not just its value.
- Recalculate taxes after a purchase at the new assessed value and current rates rather than relying on the seller’s bill.
- Keep rent rolls and operating statements ready before January 15 if an appeal is likely.
- Revisit classification after any change of use, such as adding retail space or converting units.
Because property tax is usually one of the largest expense lines, it flows straight into net operating income; our NOI calculator shows how a change in the tax bill moves the bottom line. For more on the island, see our Honolulu market page or explore other Hawaii apartment markets.
