A small mixed-use building on Main Street in Bridgehampton, a multi-tenant office on the Montauk Highway corridor, a rental cottage compound in Amagansett bought purely as an income property: none of these get any owner-occupancy break when they sell. The IRS treats them as business assets. The full gain is exposed to tax the year of the sale, and how much of it survives depends on holding period, entity structure, and a state tax layer that surprises out-of-area sellers more than any other part of the calculation.
Holding Period Sets the Federal Rate Before Anything Else
Property held a year or less is taxed at ordinary federal rates on the gain, which for a high-income East End investor can land well north of 30 percent once the top bracket applies. Cross the one-year mark and the gain qualifies for long-term capital gains rates instead, a meaningfully lower number on the exact same dollar of profit. A quick flip of a Hampton Bays duplex, even a well-executed renovation and resale, can end up taxed at nearly double the rate of an otherwise identical sale that waited a few extra months to close.
How the Title Is Held Changes the Calculation
A single-member LLC is disregarded for federal tax purposes, so an investment property held that way is taxed as if the owner held it personally. A multi-member LLC or partnership passes gain through to each partner according to their share, and depreciation recapture allocation gets more complicated when partners contributed different amounts or the property was refinanced mid-hold. Real estate parked in a C-corporation is rare on the East End for good reason: double taxation on distribution makes it a poor structure for long-term holds.
New York Adds a Layer the Federal Estimate Misses
New York taxes capital gains as ordinary income rather than offering a reduced state rate for long-term holds the way the federal system does. For a Hamptons investment sale, that means the state's share tracks the seller's regular New York bracket, and on a large East End sale that can push the combined federal-plus-state number well past what a seller who only checked the federal rate was expecting to owe.
Where a 1031 Exchange Fits Into the Picture
Investment property on the East End qualifies for 1031 exchange treatment, which defers both the capital gains tax and depreciation recapture by moving proceeds into a replacement property through a qualified intermediary, so the investor never takes possession of the sale funds directly. Hamptons owners use this to consolidate several small holdings into one larger asset, move into a different property type such as medical office or self storage, or shift into a passive DST allocation instead of sourcing and managing another building directly. The tax bill is carried forward into the new property's basis, not erased, and the 45-day identification and 180-day closing windows apply regardless of how limited the local inventory turns out to be.
Timing the Sale Around the East End Season
Investment property here often trades on a calendar that follows the summer season more than the tax year. Sellers who close a Montauk mixed-use building or a Sag Harbor office space in the spring, ahead of peak season demand, sometimes get stronger pricing than a seller who waits until after Labor Day, when buyer urgency on the East End tends to cool. That timing question is worth a conversation with a broker well before a listing goes live, since the sale date drives the holding-period calculation and, if an exchange is planned, starts the 45-day and 180-day clocks that don't pause for a slow winter market.
Frequently Asked Questions
Does it really matter if I hold a Hamptons investment property for exactly one year versus fourteen months?
Yes. Held a year or less, the gain is taxed at ordinary federal rates. Cross the one-year mark and it qualifies for long-term capital gains rates instead, which is one of the most consequential timing decisions an investor makes before listing.
If my property is held in an LLC, does that lower my tax bill?
A single-member LLC is generally disregarded for tax purposes, so the gain passes through to you the same as direct ownership. A multi-member LLC allocates gain among partners but doesn't reduce the total amount owed on its own.
Why does my accountant keep separating the New York number from the federal one?
Because New York taxes capital gains as ordinary income instead of applying a reduced long-term rate, the state portion is calculated differently from the federal number and can end up being a larger share of the total bill than sellers expect.
Can I exchange a property that's held with partners in an LLC?
Generally each partner needs to hold their own qualifying interest in the replacement property rather than exchanging as a single group, which sometimes means restructuring before closing. This needs review with a CPA well ahead of the sale.
Is there a way to know the actual tax hit before listing the property?
A CPA can run a projection from your basis, depreciation history, holding period, and current New York bracket. That number is far more useful for planning than estimating off the expected sale price alone, and most sellers run it before listing rather than after an offer arrives.
