Your Airbnb calendar just crossed night 121, and you have no idea the city already knows. There is no inspector driving by your house, no neighbor complaint sitting in a queue, no warning letter working its way through the mail. Instead, a spreadsheet row with your property address, your registration status, and your exact nights-booked count traveled from the booking platform to the Los Angeles Department of City Planning — and the platform was legally forbidden from telling you it happened.
That is the new reality of hosting in Los Angeles. Since January 1, 2026, California's SB 346 has required Airbnb, Vrbo, and every other booking platform to hand over host data to any city that asks, within 15 days, without notifying the host. Los Angeles was among the first cities to use the law at scale, and the result is an enforcement machine that cross-references platform data against the city's registration database and flags mismatches automatically. The era of flying under the radar is over.
If you host in the City of Los Angeles, here is what the rules actually require, what the new data pipeline means for you, and how to stay on the right side of a 120-night cap that now enforces itself.
The Rules Have Not Changed — The Detection Has
Los Angeles runs one of the strictest short-term rental regimes in the country, and it has since the Home-Sharing Ordinance took effect. The core requirements are unchanged:
- Primary residence only. You must live in the home at least six months — 183 days — per calendar year. Investment properties, second homes, and rent-stabilized units cannot be registered. You can register only one property at a time, and renters need written landlord permission.
- Registration before listing. You need a Home-Sharing Registration Number from the Department of City Planning before your property appears on any platform, and that number must be displayed on every listing and advertisement. Registration renews annually, and approval typically takes 30 to 60 days, so applying early matters.
- 120 unhosted nights per year. When you are not present during the guest's stay, you are capped at 120 nights per calendar year. Hosted stays — when you are home while guests are there — have no cap. An Extended Home-Sharing permit lets you go past 120 unhosted nights, but it requires additional review and a clean citation history.
- 14% Transient Occupancy Tax. Every stay of 30 days or fewer carries a 14% Transient Occupancy Tax. Platforms usually collect and remit it, but not always — if yours does not, you must register with the Office of Finance and handle collection yourself.
What changed in 2026 is not any of these rules. It is that the city no longer depends on complaints and spot checks to find violations. It gets the data directly.
What SB 346 Actually Requires Platforms to Share
California Senate Bill 346, signed in October 2025 and effective January 1, 2026, compels short-term rental platforms to share host data with any city or county that invokes the law by ordinance. When Los Angeles makes a qualifying request, platforms must respond within 15 days with the fields that matter for enforcement: the property's physical address, the host's registration status, and the number of nights booked.
Two details make this law unusually powerful. First, platforms are prohibited from notifying hosts that a data request was made — you will not get a heads-up from Airbnb that your booking history just went to City Planning. Second, platforms that refuse to hand over data face fines of up to $10,000 per day, which means compliance is effectively universal. The city can now run a simple cross-check: every address with bookings on a platform, matched against every valid registration number in its database. Addresses with bookings but no registration, registrations that lapsed, and night counts above 120 all surface without a single field visit.
The compression in listing counts tells the story. Before the Home-Sharing Ordinance took effect, Los Angeles had roughly 29,000 active short-term rental listings. By mid-2026, that number sat near 14,000 — and enforcement groups were still counting an average of more than 1,600 noncompliant listings per month on Airbnb alone. The city's data pipeline exists precisely to close that gap.
The Penalties: Up to $2,060 Per Day
Los Angeles fines escalate with inflation — they rose 3.2% with the Consumer Price Index in September 2025 and adjust annually — but the headline numbers hosts face are:
- Up to $2,060 per day for violations such as operating without registration or hosting past the 120-day cap without an extended permit — or twice the average nightly rate, whichever is higher. On a listing that rents for $300 a night, the per-day fine math gets painful fast, and it accrues every day you stay out of compliance.
- A $3.20 per-night enforcement fee on every booked night, collected by the platforms on the city's behalf. This one applies even to compliant hosts — it funds the enforcement program itself.
- Listing removal and registration suspension. The city can have your listings pulled from every platform and suspend or revoke your registration certificate. A lapsed renewal can trigger a takedown before you realize anything is wrong.
If you receive a notice of non-compliance, you have 10 days to file an appeal. Miss that window and you are canceling upcoming bookings and reapplying from scratch once you meet every requirement — a process that takes another 30 to 60 days of lost hosting income.
The Five Violations the Data Pipeline Catches First
Automated cross-referencing is best at catching violations that show up as database mismatches. These are the ones to audit in your own setup:
1. Listing without a valid registration number
This is the single most common violation, and the easiest for the city to detect: a bookable address with no matching registration. Remember that registration is not permanent — it renews every year, and a lapsed renewal looks exactly like no registration at all to an automated check. Calendar your renewal date and apply before the current registration expires.
2. Drifting past the 120-night cap
The cap counts unhosted nights per calendar year. If you host year-round at moderate occupancy, you can hit 120 nights by late spring without noticing — especially if you list on multiple platforms and no single dashboard shows the combined total. Centralize your night count in one place, and decide in advance whether you will stop at 120 or apply for Extended Home-Sharing. The extended permit is not automatic: the city reviews your registration history, neighborhood notifications, and citation record, and it can require discretionary review.
3. Forgetting that TOT is still your responsibility
When a platform collects the 14% Transient Occupancy Tax for you, it is easy to assume the tax side is handled. But platforms do not always remit in every jurisdiction, and the liability ultimately sits with you. Confirm in writing what your platform collects and remits for Los Angeles listings. If there is a gap, register with the Office of Finance within 30 days of starting business and build TOT collection into your own process. Also watch Measure TT, the live ballot measure that would raise the TOT rate — a rate change mid-year means repricing and re-remitting.
4. Renting an ineligible unit
Accessory dwelling units permitted on or after January 1, 2017 cannot be used for short-term rental unless the ADU itself is your primary residence. Rent-stabilized units are off-limits entirely. These eligibility rules do not show up in a night count, but they do show up when the city matches your registered address against its housing records — another check the new data flow makes routine.
5. Operating in the wrong jurisdiction's rules
The City of Los Angeles and unincorporated LA County run separate regimes. The county caps unhosted stays at 90 nights — not 120 — and charges a 12% TOT instead of 14%. Temporary wildfire-related flexibilities for unincorporated areas expired on May 31, 2026, so if you adjusted your setup during that window, the standard county rules apply again. Santa Monica, West Hollywood, and other incorporated cities each have their own ordinances. Verify which jurisdiction your address actually sits in before assuming the city's rules cover you.
A Compliance Checklist for LA Hosts
If you run through this list once a quarter, the automated enforcement system should have nothing to flag:
- Verify your registration is current in the City Planning portal, and confirm the renewal date is calendared with a 60-day lead.
- Check that your registration number appears on every listing across every platform, including relisted or duplicated listings.
- Reconcile your unhosted night count across all platforms against the 120-night cap, with a pacing plan for the rest of the year.
- Confirm your TOT arrangement — get written confirmation of what each platform remits, and reconcile it against your own booking records.
- Keep proof of primary residence current — two qualifying documents such as a driver's license, voter registration, utility bills, or pay stubs — so a renewal or appeal never stalls on paperwork.
- Log hosted versus unhosted nights separately, since only unhosted nights count toward the cap and you may need to prove the split.
Your Books Are Now Your First Line of Defense
Notice what every item on that checklist has in common: it is a record-keeping task. Under complaint-driven enforcement, sloppy books were a tax problem. Under data-driven enforcement, they are a compliance problem too. When the city's spreadsheet says 134 nights and yours says 118, the burden is on you to show which bookings were hosted stays, which were canceled, and which belonged to a different property — within a 10-day appeal window.
That means your hosting records need to be complete, contemporaneous, and reconcilable: every booking with its dates, platform, payout, hosted-or-unhosted status, and the TOT collected on it. Track registration fees, renewal dates, and the per-night enforcement fees platforms pass through. If you ever need Extended Home-Sharing approval, that same clean history becomes your application evidence.
Keep Your Hosting Records Audit-Ready
Running a compliant short-term rental in Los Angeles in 2026 is fundamentally an information-management job: night counts across platforms, tax collected versus tax remitted, registration dates, and proof of where you actually live. Maintaining clear financial records is what turns a scary automated flag into a routine appeal you can win. Beancount.io provides plain-text accounting that gives you complete transparency and control over your financial data — no black boxes, no vendor lock-in. Get started for free and see why developers and finance professionals are switching to plain-text accounting.
