Picture a 62-year-old homeowner with $1.4 million in equity, sitting across from an estate attorney who’s suggesting she seed a family limited partnership with proceeds from a cash-out refi. The lender has quoted 80% LTV on the primary residence. On the attorney’s side of the table: valuation discounts and the $15 million OBBBA exemption. On the lender’s side: debt service and seasoning. And the CPA, who hasn’t been in the room yet, will be thinking about Treasury Regulation §1.163-8T. Three disciplines, three answers – and the homeowner needs all of them to line up before closing docs get signed.
This article is educational only. It’s not legal, tax or financial advice. A mortgage-funded FLP contribution requires coordinated review by your mortgage lender, your CPA and an estate planning attorney.
What actually happens at the closing table
The loan’s in your name. The FLP isn’t the borrower, isn’t on the note, and doesn’t appear on title. At closing, net proceeds wire to your personal account. From there, you wire the contribution to the FLP’s operating account, with the memo line referencing the capital contribution clause and the date of the FLP agreement. The FLP’s books record the contribution under Treas. Reg. §1.704-1(b)(2)(iv), the capital account updates, and the contribution surfaces on Schedule K-1 Part II Item L the following tax year.
Your outside basis in the FLP interest increases by the contributed amount, per IRC §722. That basis figure matters later – for loss deduction limits and for the taxation of distributions. But the home itself stays titled in your personal name at closing. Lenders won’t fund a cash-out on a property owned by a partnership, and any post-closing attempt to deed the house into the FLP sits in different legal territory (covered below).
Lender perspective: the FLP is invisible
Here’s the practical reality. Fannie Mae Selling Guide B2-1.3-03 permits cash-out proceeds for any purpose. There’s no agency-level prohibition on funding a partnership contribution. The 1003 application captures intent at the “any purpose” level, and most lenders don’t probe further. Portfolio and jumbo lenders occasionally request a letter of explanation on seven-figure cash-outs, usually to satisfy their own file documentation (rather than any agency rule).
Standard 2026 conventional cash-out LTV caps run near 80% on a primary single-unit, 75% on a second home and 75% on a one-unit investment property. The six-month seasoning rule applies on conventional product; FHA cash-out seasoning runs 12 months. Jumbo overlays vary by lender and often tighten LTV, raise reserve requirements or impose post-closing liquidity thresholds for proceeds in the $500,000 to $2 million range that FLP seedings typically require. The borrower services the loan from personal cash flow, and the FLP has no obligation on the note. For a refresher on product mechanics, see our guide to conventional cash-out refinance rules.
Where the mortgage interest deduction lives
The standard home mortgage interest deduction under IRC §163(h)(3) doesn’t apply here. That deduction, documented in IRS Publication 936, is available only to the extent proceeds buy, build or substantially improve the securing residence. Contributing cash to a partnership does none of those things. The $750,000 acquisition-debt cap and the post-TCJA treatment of home-equity interest got extended under the One Big Beautiful Bill Act (OBBBA, signed July 4, 2025); review the 2026 Pub. 936 update for the controlling definition before you file. For background, see home-equity interest deductibility post-OBBBA.
So where does the deduction go? It moves.
Treasury Regulation §1.163-8T allocates interest expense based on how proceeds get used rather than what secures the debt. Because the proceeds enter a passthrough entity, interest traces through to the FLP’s activities. IRS Notice 89-35 and Rev. Rul. 2008-38 govern the mechanics of partner-level debt flowing to partnership activity.
Three outcomes follow from what the FLP actually does with the money. If the FLP operates a trade or business, the interest’s a business interest allocated to that activity. Reporting typically runs on Schedule E, Part II as unreimbursed partnership expense – but only when the partnership agreement obligates the partner to bear it personally. And practitioner opinion splits on whether the interest should instead flow through on K-1 Line 13. Partnership agreement language controls, and a CPA review is the only reliable way to settle the classification.
But what if the FLP holds portfolio investments? Then the interest becomes investment interest under IRC §163(d), capped at net investment income and reported on Form 4952. If the FLP later distributes cash back to the contributing partner for personal use, the interest allocated to that distribution becomes personal interest – and nondeductible under post-TCJA rules.
The 2026 estate planning backdrop
OBBBA set the federal estate, gift and GST exemption at $15 million per person starting January 1, 2026, with no scheduled sunset. So the 2024-2025 “use it or lose it” urgency that drove a wave of FLP formation has eased. But the strategic case still holds in states that levy their own estate tax (Oregon, Massachusetts, Washington and New York are the familiar ones), where exemption thresholds sit well below the federal figure.
Valuation discounts available on gifted limited-partnership interests, driven by lack of marketability and lack of control, commonly fall in the 20% to 40% range on a combined basis. The 2016 proposed §2704 regulations that would’ve curtailed those discounts were withdrawn in 2017 and haven’t been revived since.
The §2036(a) landmine when loan proceeds fund the FLP
IRC §2036(a) is the retained-enjoyment rule. If the IRS can show the decedent kept possession or enjoyment of contributed property, or that there was an implied agreement about retained benefits, the full date-of-death value of the contributed assets gets pulled back into the gross estate. And the valuation discount vanishes with it.
Courts apply a “bona fide, significant, non-tax purpose” test. The pattern that loses – documented across Est. of Bongard (124 T.C. 95, 2005), Est. of Powell (148 T.C. 392, 2017), Est. of Moore (T.C. Memo 2020-40) and Est. of Cecil (T.C. Memo 2023-24) – is consistent: commingled funds, decedent paying personal expenses out of FLP accounts, no legitimate operating purpose for the entity, and discounting applied against assets the decedent never truly let go of. Read these cases back-to-back and the §2036 case law reads less like legal theory and more like a diary of informal control, logged in canceled checks, bank statements and distributions timed suspiciously close to the contributor’s bills.
Mortgage-funded contributions sharpen the risk. If the decedent services the mortgage from personal, non-FLP sources after the contribution, the IRS can argue the FLP never bore the economic burden of the leveraged capital. And the contribution starts to look like a conduit rather than a transfer.
A mortgage-funded FLP serviced from the contributor’s own non-FLP cash flow is wearing a target.
Three traps worth naming
The disguised sale rule under IRC §707(a)(2)(B) and Treas. Reg. §1.707-5 recharacterizes a contribution-plus-distribution as a sale when cash moves back to the partner within a short window. A two-year presumption window applies. So an FLP that receives mortgage-funded capital and distributes cash back to the partner inside that window sits in disguised-sale territory, and it’s a hard argument to walk back once the IRS plants that flag.
The Garn-St Germain Act at 12 USC §1701j-3(d) permits transfer of a mortgaged residence to an inter vivos revocable trust without triggering due-on-sale. But it doesn’t generally extend to a partnership. Deeding the home itself into the FLP after closing is a separate transaction with its own loan acceleration exposure.
Unrelated business taxable income under IRC §514 arises when a tax-exempt partner (a charity, a foundation, a trust holding Roth-sourced assets) sits inside an FLP that holds debt-financed property or income. Rare in a vanilla family partnership, worth checking if the partner mix is unusual. For related retirement-structure risk, compare the self-directed IRA cash-out trap.
When this works and when it doesn’t
The strategy generally holds up when the FLP operates a real business – an actively managed rental portfolio with a written management agreement, a working family enterprise, a timber or farming operation – when the mortgage gets serviced from genuinely independent cash flow, when the partner refrains from drawing personal expenses out of FLP accounts, and when gifts of limited interests follow a clear timeline with contemporaneous appraisals.
But it routinely fails when the FLP is a holding vehicle for marketable securities and little else, when the contributor keeps using the contributed value for personal consumption, or when mortgage debt service traces back to the contributor’s personal income with no FLP participation. For a contrast on entity ownership mechanics, see cash-out refinance when the property is held in an LLC; for a sibling entity-funding pattern, see DST investment with cash-out proceeds.
Your three-advisor checklist before closing
Three advisors need to sign off before you close. The lender has to confirm the FLP won’t appear on the note or on title, that the “any purpose” box covers the intended use, and that no portfolio overlay requires further disclosure. The CPA has to confirm how interest will trace under Treas. Reg. §1.163-8T based on the FLP’s actual activity, whether UPE on Schedule E or K-1 Line 13 is the proper reporting channel, and whether any portion risks reclassification as personal. And the estate planning attorney has to confirm that the FLP has a documented non-tax operating purpose, that mortgage servicing won’t run through the contributor in a way that invites §2036 attack, and that any planned gift of limited interests follows a timeline that avoids disguised-sale and §2036 overlap.
Worth knowing: requirements vary by lender, CPA practice and state law. This article is educational only. Confirm current treatment with your mortgage lender, your CPA and an estate planning attorney before signing any cash-out refinance intended to fund a family limited partnership.
Frequently asked questions
Can I use cash-out refinance proceeds to fund a family limited partnership?
Yes. Fannie Mae and most portfolio lenders permit proceeds for any purpose, including an FLP capital contribution. The loan stays in your personal name; the FLP sits downstream of the proceeds.
Is the mortgage interest deductible if I contribute the cash to an FLP?
The IRC §163(h)(3) home mortgage deduction doesn’t apply, because the proceeds don’t buy, build or improve the residence. Deductibility traces through to the FLP’s use of the funds under Treas. Reg. §1.163-8T. Your CPA settles classification.
Can the FLP be the borrower on the mortgage instead of me?
No. Residential lenders won’t originate a cash-out mortgage with a partnership as borrower on an owner-occupied home. You remain personally liable on the note.
What is IRC §2036 and why does it matter for a mortgage-funded FLP?
IRC §2036(a) pulls contributed property back into the taxable estate if the decedent kept possession or enjoyment. A mortgage serviced from personal cash flow sharpens the risk that the IRS argues the FLP never bore the economic burden.
Can I move my home into the FLP after the cash-out refinance closes?
Deeding a mortgaged home into a partnership generally triggers due-on-sale under 12 USC §1701j-3. Garn-St Germain protects transfers to a revocable trust, not to a partnership. Treat any such transfer as a separate transaction.
What is the federal estate tax exemption in 2026 after OBBBA?
OBBBA set the federal estate, gift and GST exemption at $15 million per person starting January 1, 2026, with no scheduled sunset. Confirm the inflation-indexed figure at filing time.
Do FLP valuation discounts still work in 2026?
Yes. The 2016 proposed §2704 regulations were withdrawn in 2017 and haven’t been revived. Discounts on limited interests commonly fall in the 20% to 40% range when supported by a qualified appraisal.
What happens if the FLP distributes the cash back to me later?
Within a two-year window, the IRS can recharacterize the contribution-plus-distribution as a disguised sale under IRC §707(a)(2)(B). The reclassification can trigger gain recognition and unwind the planning benefit.
Sources and further reading
- IRC §163, §163(h)(3), §163(d), §722, §707(a)(2)(B), §2036(a), §514
- Treas. Reg. §1.163-8T, §1.704-1(b)(2)(iv), §1.707-5
- IRS Publication 936 (home mortgage interest deduction)
- IRS Notice 89-35; Rev. Rul. 2008-38
- Est. of Bongard, 124 T.C. 95 (2005); Est. of Powell, 148 T.C. 392 (2017); Est. of Moore, T.C. Memo 2020-40; Est. of Cecil, T.C. Memo 2023-24
- Fannie Mae Selling Guide B2-1.3-03
- 12 USC §1701j-3 (Garn-St Germain Depository Institutions Act)
- One Big Beautiful Bill Act (OBBBA), signed July 4, 2025
