You just bought a condo in Kailua and your neighbor casually mentions they Airbnb theirs on weekends. You pull up Airbnb and see dozens of listings in your neighborhood. So you figure: if they are doing it, it must be legal. You would be wrong — and the mistake could cost you $10,000 per day in fines.
Oʻahu's short-term rental laws are among the most restrictive in the country, and they changed again in 2025. What was legal three years ago may not be legal today. What your neighbor is doing might be grandfathered, illegal, or operating in a gray area that the city has not caught yet. If you are thinking about buying investment property on Oʻahu, renting your home while you PCS, or simply trying to understand what your property can and cannot do, here is the complete picture — verified, current, and honest about the complexity.
⚡ Quick Take
- 90-day minimum rental term for non-resort, non-grandfathered properties took effect September 2025 under Ordinance 25-02 (Source: Hawaii Living, Honolulu DPP)
- Only three zones on Oʻahu allow nightly/weekly rentals: Waikiki (resort-zoned), Ko Olina, and Turtle Bay Resort
- Total tax burden on Oʻahu STR income in 2026: 18.5% — GET 4.5% + State TAT 11% + Oʻahu OTAT 3% (Source: Hawaii Tax Department)
- Fines for illegal STRs: $1,000–$10,000 per day per violation — the city issued $28.9 million in fines in 2024, though collection remains poor (Source: Hawaii News Now)
- NUC (Nonconforming Use Certificate) holders — properties grandfathered before October 22, 1986 — are the only non-resort properties that can legally rent under 90 days, and no new NUCs are being issued
The Legal Timeline: How We Got Here
Oʻahu's STR regulations have been a moving target. Here is the sequence that matters:
| Date | What Happened |
|---|---|
| **2019** | Bill 89 established STR registration requirements |
| **April 2022** | Bill 41 (Ordinance 22-7) changed the minimum from 30 to 90 days outside resort zones |
| **October 2022** | Federal judge blocked the 90-day rule via preliminary injunction |
| **2023** | Court made the injunction permanent — reverted to 30-day minimum |
| **2024** | Governor Green signed Act 017 (SB 2919) granting counties full authority over STRs |
| **January 2025** | Mayor signed CO 25-02 (Bill 62) reinstating the 90-day minimum |
| **September 2025** | 90-day rule takes effect |
(Source: Hawaii Living, Civil Beat, Governor.hawaii.gov)
The city tried to shut down most short-term rentals in 2022 with Bill 41, a federal judge blocked it, the state legislature gave the city more power in 2024, and the city came back with a new law in 2025 that accomplished the same goal. If you bought a rental property between 2022 and 2025 assuming the 30-day minimum would stick, the regulatory landscape has changed significantly. We help owners understand their current options.
What Is Actually Legal on Oʻahu in 2026
Nightly/Weekly Rentals (Under 30 Days)
Legal only in resort zones:
- Waikiki — hotel and resort-zoned condos (Ilikai, Waikiki Shore, Waikiki Beach Tower, Trump Tower, Ritz-Carlton)
- Ko Olina — Beach Villas at Ko Olina allow under-30-day rentals; many other Ko Olina properties have a 30-day minimum
- Turtle Bay Resort — resort-zoned
Also legal: Properties with a valid NUC (Nonconforming Use Certificate) — but only if they were operating before October 22, 1986 and have renewed annually without lapse.
Monthly Rentals (30–89 Days)
Legal for NUC holders and pre-existing STRs that were operating under the 30-day rule before the 2025 law change. The city can only enforce the 90-day rule prospectively — pre-existing operations are treated as nonconforming uses.
90-Day Minimum Rentals
Legal for all residential properties that register with the Department of Planning and Permitting (DPP), comply with zoning, and pay all applicable taxes.
Long-Term Rentals (6+ Months)
Legal everywhere. This is what the city wants you to do with your investment property. Long-term rentals are subject to GET (4.5% on Oʻahu) but not the TAT or OTAT — a significantly lower tax burden.
(Source: Honolulu DPP, Midway Vacations, HI Estates)
The Tax Math: 18.5% on Short-Term Income
If you operate a legal STR on Oʻahu, here is what you owe on every dollar of rental income:
| Tax | Rate | Notes |
|---|---|---|
| General Excise Tax (GET) | **4.5%** | State 4% + Oʻahu surcharge 0.5% |
| Transient Accommodations Tax (TAT) | **11%** | Increased from 10.25% on January 1, 2026 |
| Oʻahu TAT (OTAT) | **3%** | County-level tax on gross rental proceeds |
| **Total** | **18.5%** | Applied to gross rental income |
(Source: Hawaii Tax Department Announcement 25-03, Honolulu OTAT FAQ)
Comparison with long-term rental tax:
- Long-term rental (6+ months): GET only = 4.5%
- Short-term rental (under 180 days): GET + TAT + OTAT = 18.5%
For every $100 of STR income, you keep $81.50. For every $100 of long-term rental income, you keep $95.50. The tax difference is $14 per $100 — or roughly $840/month on a unit generating $6,000/month in short-term bookings. That $840/month in extra taxes needs to be offset by substantially higher nightly rates for STR to make financial sense over long-term rental. We help owners run this comparison before they commit.
For a deeper dive on GET and long-term rental taxes, see our Hawaii GET guide for landlords.
Have questions about this?
(808) 927-0508NUC Holders: The Grandfathered Exception
NUCs were issued to properties that were operating as transient vacation units before October 22, 1986. These are the only non-resort properties on Oʻahu that can legally operate as short-term rentals (under 90 days).
Critical rules for NUC holders:
- Must renew annually between September 1 and October 15
- Failure to renew by October 15 results in automatic, permanent loss of the NUC
- All advertising must display the NUC number
- No new NUCs are being issued — the total number can only decrease
- NUC properties command a premium because the license is irreplaceable
(Source: Honolulu DPP, Salazar Group Hawaii)
For investors: Buying a property with a valid NUC is like buying a taxi medallion in New York before Uber — it is a finite, scarce asset that allows you to operate in a market that is otherwise closed. The premium for NUC properties reflects this scarcity. Verify the NUC status directly with DPP before closing — a lapsed NUC cannot be reinstated.
Enforcement: Aggressive but Inconsistent
The city has ramped up enforcement significantly:
- DPP actively investigates complaints and cross-references Airbnb/VRBO listings against registration records
- Fines range from $1,000 to $10,000 per day per violation
- In 2024, DPP issued $28.9 million in fines — but only collected $1,094,640 directly, plus an additional $45,051 through a collection agency
(Source: Hawaii News Now, April 2025)
The city is actively enforcing, and a $10,000/day fine accumulates fast. Even if collection is sometimes slow, the liability is real. DPP has also begun issuing cease-and-desist orders that can affect your ability to sell or refinance. We always counsel our clients to stay on the right side of these rules.
What This Means for Buyers
If you are looking at investment property on Oʻahu, understand the STR landscape before you underwrite a single number. A condo in Kailua or Hawaii Kai that looks like a great Airbnb play is almost certainly restricted to 90-day minimums — which dramatically reduces booking flexibility and revenue compared to nightly rentals.
Your realistic options for STR income:
1. Buy in a resort zone (Waikiki, Ko Olina) — highest revenue, highest purchase price, highest competition
2. Buy a property with a valid NUC — scarce, expensive, but legally bulletproof
3. Operate at 90-day minimums — possible but revenue is lower and the tenant pool is smaller (snowbirds, corporate relocations, traveling nurses)
4. Long-term rental — lowest hassle, lowest tax rate (4.5% vs. 18.5%), and steady demand on Oʻahu where the rental market is tight
For military families: if you are PCSing and considering renting your home, long-term rental is almost always the better play. The STR regulatory risk is not worth it for a 2–3 year PCS absence. See our guide on choosing a property manager.
What This Means for Sellers
If your property has a valid NUC, highlight it aggressively in your listing — it is a major selling point that adds real value. If your property is in a resort zone with an established STR track record, provide booking history and revenue data to prospective buyers.
If your property is a standard residential home that was being used as an STR under the old 30-day rule, be transparent about the regulatory change. The 90-day minimum affects the property's income potential and therefore its value to investors. Pricing should reflect the current legal reality, not the pre-2025 revenue numbers.
For a full breakdown of what it costs to sell, see our seller cost guide. For staging tips that appeal to both end-users and investors, see our staging guide.
Frequently Asked Questions
Can I legally Airbnb my home on Oʻahu?
Only under very specific conditions. If your property is in a resort zone (Waikiki, Ko Olina, Turtle Bay), yes — with proper registration. If you have a valid NUC, yes — with annual renewal. If neither applies, you can rent for a minimum of 90 days (or 30 days for pre-existing nonconforming uses). You must also carry $1,000,000 in commercial general liability insurance and register with DPP. Listing your home for nightly or weekly stays outside these conditions exposes you to fines of $1,000–$10,000 per day. (Source: Honolulu DPP, Hostaway)
What is the total tax on short-term rental income on Oʻahu in 2026?
18.5% of gross rental income. This includes: GET at 4.5% (state 4% + Oʻahu surcharge 0.5%), State TAT at 11% (increased from 10.25% on January 1, 2026), and Oʻahu OTAT at 3%. All three are applied to gross rental proceeds for rentals under 180 days. Long-term rentals (6+ months) are only subject to GET at 4.5%. (Source: Hawaii Tax Department)
What is a NUC and can I get one?
A NUC (Nonconforming Use Certificate) was issued to properties operating as short-term rentals before October 22, 1986. It grants the legal right to continue operating despite zoning changes. No new NUCs are being issued. Existing NUCs must be renewed annually between September 1 and October 15 — miss the deadline and the NUC is permanently lost. The only way to acquire a NUC property is to buy one from an existing owner. (Source: Honolulu DPP)
What happens if I rent short-term without a permit?
You face fines of $1,000 to $10,000 per day per violation. DPP actively monitors platforms like Airbnb and VRBO and cross-references listings against registration records. In 2024, the city issued $28.9 million in fines. While collection has been inconsistent ($1.1M collected of $28.9M issued), the liability is real and can affect your ability to sell or refinance the property. Cease-and-desist orders can also be attached to the property record. (Source: Hawaii News Now)
Is it better to do short-term or long-term rental on Oʻahu?
For most property owners outside resort zones, long-term rental is the smarter play. The tax rate is 4.5% (vs. 18.5% for STR), the regulatory risk is near zero, and Oʻahu's long-term rental market is tight — the 2026 rental market data shows strong demand and rising rents. Short-term rental only makes financial sense if you are in a resort zone or hold a NUC, where nightly rates of $200–$400+ can justify the higher tax burden and operational costs. For most residential properties, long-term rental with a quality property manager is simpler, legal, and often more profitable after taxes.
How does the 90-day rule affect property values?
Properties that were valued based on STR income projections using 30-day minimums may see a correction as the 90-day rule reduces revenue potential. The impact varies by location — Kailua, North Shore, and Lanikai properties that commanded premiums based on vacation rental income are most affected. Properties in resort zones with legal STR rights may actually appreciate as the supply of legal STR properties shrinks. For standard residential properties valued on comparable sales rather than income, the impact is minimal.