Understanding Short-Term Rentals on Oahu

If you own property on Oahu or are thinking about buying one as an investment, short-term rentals are probably on your radar. The potential income from vacation rentals in Hawaii is attractive, but the regulatory landscape is one of the most complex in the country. Between city ordinances, state tax requirements, zoning restrictions, and enforcement actions, there is a lot to navigate before you list a single night on Airbnb or Vrbo.

This guide is the first in our deep-dive series on short-term rentals in Honolulu County. We cover everything from where STRs are legally allowed to Nonconforming Use Certificates, taxes, registration, insurance, enforcement, condo rules, and investment strategy. Whether you are an existing owner, a prospective buyer, or simply trying to understand the rules, this series is built to be your go-to resource.

What Counts as a Short-Term Rental on Oahu?

Under Honolulu law, a short-term rental (STR) is any lodging that provides guest accommodation for less than 30 consecutive days. This definition is critical because it determines which rules, taxes, permits, and property tax classifications apply to your property.

Rentals of 30 days or more are generally treated as residential tenancies and are subject to different regulations. However, for state tax purposes, the Transient Accommodations Tax (TAT) applies to stays of less than 180 consecutive days, which means even monthly rentals between 30 and 179 days trigger the TAT.

A Brief History of Oahu STR Legislation

Oahu’s short-term rental laws have changed significantly over the past several years. Here is a timeline of the key milestones:

  • Before 1986: Properties operating as vacation rentals could obtain a Nonconforming Use Certificate (NUC). After October 22, 1986, no new NUCs were issued.
  • 2019 – Bill 89 (Ordinance 19-18): Required STRs outside designated resort zones to have special permits. Rentals under 30 days were restricted in residential areas.
  • 2022 – Bill 41 (Ordinance 22-7): Passed by the Honolulu City Council 8-1, this ordinance attempted to increase the minimum stay to 90 days outside resort zones, imposed registration requirements, and increased fines up to $10,000 per day.
  • 2022 – Federal Court Injunction: A federal judge blocked the 90-day minimum provision, keeping the enforceable minimum at 30 days.
  • 2024 – Act 017 (SB 2919): The state legislature granted all Hawaii counties complete authority over STRs, including the power to regulate time, place, manner, and duration, and even to phase out or amortize existing legal STRs.
  • 2025 – Bill 62 (CO 25-02): Signed by Mayor Blangiardi in January 2025, this ordinance reinstated the 90-day minimum for residential neighborhoods with an effective date of September 2025 and penalties up to $5,000 initially, escalating to $10,000 per day.

Current reality: While the 90-day minimum is on the books, the Department of Planning and Permitting continues to enforce STRs at the less-than-30-day threshold. Properties in resort-zoned areas can still operate with stays under 30 days with proper registration.

Where Are STRs Allowed on Oahu?

STRs are only permitted in specific areas:

  • Resort-zoned areas: Including Waikiki, Ko Olina, Turtle Bay, and certain parts of Makaha and Kahala
  • Specific apartment-zoned areas: Mapped in Ordinances 22-07 and 25-52
  • NUC properties: Grandfathered properties operating legally before October 22, 1986

In most residential neighborhoods across Oahu, including Mililani, Kailua, Kaneohe, Hawaii Kai, and Ewa Beach, STRs of less than 30 days are illegal without a valid NUC or resort zoning. We go much deeper into zoning in our Oahu STR Zoning Guide.

Registration and Fees

If your property is in an eligible area, you must register with the Department of Planning and Permitting before operating. Key details:

  • Initial registration fee: $1,000
  • Annual renewal fee: $500 (for continuing owners)
  • New registration required: $1,000 fee if there is any change in ownership or operator
  • Registration is non-transferable – buying a property that was previously registered does not transfer the registration to you
  • All advertisements must display your STR registration number or NUC number and the Tax Map Key (TMK) of the property

Taxes on Short-Term Rental Income

STR operators on Oahu are subject to multiple layers of taxation:

  • General Excise Tax (GET): 4.712% on Oahu (4% state + 0.712% county surcharge)
  • State Transient Accommodations Tax (TAT): 11% as of January 1, 2026
  • Oahu Transient Accommodations Tax (OTAT): 3% county-level surcharge

Combined, the total tax burden on gross rental income is approximately 18.7%. On $8,000 in monthly gross rental income, that translates to roughly $1,500 in taxes before property tax, insurance, management fees, or any other expenses.

For a full breakdown with calculation examples, see our Oahu STR Tax Guide.

Property Tax Impact

Registering as an STR triggers a higher property tax classification. For the FY 2025–2026 tax year, Oahu’s TVR-STRH (Transient Vacation Rental / Short-Term Rental Home) rates are:

  • Tier 1 (up to $1M): $12.50 per $1,000 of assessed value
  • Tier 2 ($1M–$3M): $14.00 per $1,000
  • Tier 3 (over $3M): $15.55 per $1,000

Compare that to owner-occupied residential rates starting at just $1.65 per $1,000. A $1 million property classified as an STR pays approximately $12,500 per year in property tax versus $1,650 for an owner-occupied home. That is a massive difference that directly affects your bottom line. We cover this in detail in our STR Property Tax Guide.

Enforcement Is Real

The City and County of Honolulu actively enforces STR violations through the Department of Planning and Permitting. Penalties include:

  • First offense: Up to $5,000
  • Continued violations: Up to $10,000 per day
  • Illegal advertising: $1,000 to $10,000 per day for advertising an unregistered STR

Anyone can report a suspected illegal STR through the DPP’s online portal. Airbnb and Vrbo are also required to register with the city and submit monthly booking reports. The DPP maintains a public STR Compliance Map showing registered properties and those with violation orders.

What This Series Covers

This is the first post in our comprehensive Oahu Short-Term Rental Guide series. Here is what we cover across the full series:

Have Questions About Short-Term Rentals on Oahu?

If you are considering buying or selling a property with STR potential on Oahu, we can help you navigate the process. Whether it is understanding zoning, evaluating NUC properties, or running the numbers on an investment, our team works with buyers and sellers across Oahu every day.

Contact Kristy and Austin to start the conversation, or visit our home buying page to learn more about purchasing property on Oahu. You can also explore listings across our featured communities including Ho’opili, Kapolei, Waikiki, and Ko Olina.