Buyer’s Q&A
Can I claim mortgage interest deduction on a US fractional share?
In many cases it can be. The Tax Cuts and Jobs Act of 2017 changed the mortgage interest deduction, and eligibility depends on how the share is classified for US tax purposes. A US tax specialist confirms your position.
The short answer: It can be. Mortgage interest on a primary or second home is deductible up to the TCJA caps, and a 1/8 share with around six weeks of personal use comfortably meets the IRS second-home use test. Whether your financing qualifies comes down to two things: how the home's legal set-up is treated for federal tax purposes, and whether the loan is secured by the real estate itself or by your share. Our partner explains both, and a US tax specialist confirms your position in one conversation.
The US mortgage-interest-deduction framework
Post-2017 Tax Cuts and Jobs Act, US mortgage interest deduction is limited to:
- Mortgages on primary residence and one second home, up to combined $750,000 of mortgage debt (acquired after Dec 15, 2017)
- Interest paid on this qualifying mortgage debt is deductible against taxable income
- Property must qualify as primary or second home (personal-use rules apply)
- Interest on home-equity loans is deductible only if used for home acquisition or improvement
How fractional shares fit into this framework
The applicability of mortgage-interest deduction to a fractional share depends on three factors.
1. Federal tax classification. How a share is treated for US federal tax purposes depends on the country and the home's legal set-up, which our partner explains before you buy. Where it is treated as direct real estate, the standard second-home rules apply; other set-ups follow different rules.
2. Second-home qualification. The IRS second-home definition requires the property be used personally for more than 14 days per year or 10% of total rental days (whichever is greater). A 1/8 share with around six weeks of personal use comfortably meets this.
3. Mortgage structure. Whether the financing is a direct property mortgage secured by the underlying real estate, or a loan secured by the share, affects deductibility. Direct property mortgages typically qualify; loans secured by the share often don't qualify as "home mortgage" for deduction purposes.
How it typically works for US fractional buyers
For most US buyers of fractional shares financed through company-partner banks (typical for Aspen, Tahoe, Park City, etc.):
- The financing is often structured as a loan to the buyer secured by their share
- Depending on the home's legal set-up, this often doesn't qualify for standard home-mortgage-interest deduction
- The interest may be deductible as investment interest expense, but only against investment income (limits practical deduction)
So it's worth knowing which structure applies when you weigh paying cash against financing — and remember that with a share you are borrowing, and paying interest on, a fraction of what a whole home would need.
Structures that typically qualify
Three set-ups that typically qualify for the deduction. First, fractional structures using TIC (tenancy-in-common) — TIC interests are direct real-estate co-ownership and typically qualify for home-mortgage deduction treatment. Second, other legal set-ups treated as direct real-estate ownership for US tax purposes. Third, mortgages structured as direct property liens rather than loans secured by the share (uncommon but possible).
Our partner can tell you which applies to your home.
What US fractional buyers should do
Two simple steps. First, ask our partner how the home's legal set-up is classified for federal tax purposes and how the financing is structured. Second, have a US tax specialist compare financed and cash purchase on a post-tax basis, so you choose the route that suits you best.
For non-US buyers
The US mortgage-interest deduction is a US-tax-resident benefit. Non-US buyers of US fractional shares don't benefit from US mortgage-interest deduction (they may have analogous deductions in their home country, depending on residence). This question primarily affects US-resident buyers of US fractional inventory.
Four questions for the company
How is the home's legal set-up classified for federal tax purposes? How is the financing structured — loan to buyer secured by the share, or direct property mortgage? Has the company advised any prior buyers on the mortgage-interest-deduction question for this property? Can the company recommend a US tax specialist familiar with fractional structures?
Where to find US fractional inventory with financing
Co-Ownership Property's US selection includes companies offering financing arrangements, with terms disclosed during the buyer-introduction process.
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