Buyer’s Q&A
Can I claim mortgage interest deduction on a US fractional share?
Possible but complex. The Tax Cuts and Jobs Act of 2017 restricted mortgage interest deduction; fractional share's classification (real estate or partnership interest) affects eligibility. Specialist US tax advice essential.
The short answer: Possibly, depending on the share's tax classification and the buyer's specific situation. Mortgage interest on a primary or second home can be deductible (up to TCJA caps); mortgage interest on partnership-interest holdings has different rules. Whether your fractional share qualifies depends on: how the home's legal set-up is classified for federal tax purposes; whether the property qualifies as a second home for the buyer's tax purposes (personal-use percentage vs rental-use); whether the mortgage is secured by the underlying real estate or by the share. Always engage a US tax specialist to verify before relying on the deduction.
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. Depending on that set-up, the share may qualify for the same treatment as direct real estate — or it may be treated as a partnership interest or corporate stock, with 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 should comfortably meet this; but depending on the home's legal set-up, the analysis can be more complicated.
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.
The realistic position for most US fractional buyers
For most US buyers of fractional shares financed through operator-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)
Net effect: many fractional financing structures don't deliver the mortgage-interest deduction that whole-property second-home financing does. This is a meaningful tax cost difference that should be factored into the cash-vs-finance decision.
Exceptions and edge cases
Three structural variations that may qualify for 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. Three, mortgages structured as direct property liens rather than loans secured by the share (uncommon but possible).
None of these can be assumed — ask our partner how the specific home is set up, and verify the position with a US tax specialist.
What US fractional buyers should do
Three practical 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, model the post-tax cost of financed vs cash purchase with a US tax specialist before signing — assume the mortgage-interest deduction may not apply unless verified. Three, don't underwrite the purchase economics on the assumption that mortgage interest will be deductible.
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.
What buyers should ask the operator
Four questions. 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 operator advised any prior buyers on the mortgage-interest-deduction question for this property? Can the operator recommend a US tax specialist familiar with fractional structures?
Where to find US fractional inventory with financing
Co-Ownership Property's US marketplace includes operators offering financing arrangements, with terms disclosed during the buyer-introduction process.
Further reading
Get in Touch
Speak to an expert
Tell us what you're looking for and one of our co-ownership specialists will be in touch within 24 hours.