Maine short-term rental rules for owners

Maine regulates short-term rentals mainly through two instruments: its tax code and its towns. There is no statewide operating license, no state cap and no state law that stops a town from restricting rentals. In a state of nearly 500 municipalities with a strong town meeting tradition, the local ordinance is therefore the document that decides whether a property works.

The state layer is tax

Maine taxes the rental of living quarters at 9%. Anyone who rents living quarters to others must register with Maine Revenue Services as a retailer and collect the tax, with two exceptions worth knowing:

• a stay of 28 continuous days or more is exempt when the unit is the guest's primary residence or is needed for school or work;
• an owner with a single unit rented fewer than 15 days a year does not have to register, unless an intermediary manages it, in which case the intermediary collects.

Transient rental platforms must collect and remit the tax on the full amount they charge the guest, cleaning and service fees included. Owners who rent only through platforms are largely covered; direct bookings, returning guests who pay by check and agency rentals are where filings tend to be missed.

How towns regulate

Local approaches fall into three broad families.

• Caps. Portland limits non-owner-occupied rentals on the mainland to 1.5% of registered long-term rentals for 2026, allows no new tenant-occupied short-term rentals from 2026 and runs a separate cap on Peaks Island. Bar Harbor caps non-owner-occupied VR-2 rentals at 9% of its housing units, does not let registrations pass to a buyer and tightened primary-residence proof in November 2025.
• Registration or licensing without a cap, usually with safety checklists, a local contact and parking rules. Many coastal towns, Old Orchard Beach and Ogunquit among them, work this way.
• No dedicated ordinance. Some towns have chosen not to regulate: Newry, home of Sunday River, voted down an ordinance at town meeting in May 2025.

Rules are moving fastest in the Midcoast, the Lakes Region and island communities, where housing shortages drive the debate. A check that is a year old may already be out of date.

Condominiums, septic and shoreland zoning

Many condominium associations restrict short stays or impose minimum terms. Rural and lakefront homes depend on septic systems sized for a set number of bedrooms, and shoreland zoning limits expansion near lakes, rivers and the sea. A camp that "sleeps ten" in a listing may be permitted for far fewer.

Insurance and safety

We found no state insurance minimum specific to short-term rentals, but lenders, associations and some towns set their own. Homeowner policies often exclude business use, so choose a policy written for short-term rentals. Smoke and carbon monoxide alarms are expected in every rental, and towns with licensing programs may inspect.

Seasonality shapes compliance

Maine's markets are among the most seasonal in the country: summer on the coast, winter in the ski towns, foliage in between. Many towns renew registrations on an annual cycle, so schedule renewals, inspections and repairs for the quiet months rather than the week before Memorial Day.

Records worth keeping

Because the tax follows the booking channel, keep a simple ledger that separates platform reservations from direct ones, with dates, guest counts and amounts collected. It makes the monthly or quarterly return quick, it answers the questions a town clerk asks at renewal, and it is the first thing an auditor from Maine Revenue Services will want to see. The same file is a good place for septic pumping receipts, alarm tests and the association's rental approvals.

Owner checklist

• Read the current ordinance of the exact town, including any cap or waiting list.
• Register with Maine Revenue Services if you will take direct bookings.
• Check condominium documents, the septic design and shoreland rules.
• Buy insurance designed for short-term rentals.
• Put local renewal deadlines in the calendar.

For owners in Portland, on the southern beaches, around Acadia or near Sunday River, we study every request and tell you honestly whether and how we can help.