Tax consequences of using a cash‑out refinance to pay off your fiancée’s mortgage depend on a few different issues: whether the $100,000 is treated as taxable income (it isn’t), whether there’s any gift tax exposure, and what happens to your mortgage interest deduction.
Below is a breakdown in plain language.
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1. Is the $100,000 cash‑out taxable income?
No. When you refinance your own home and pull out equity, the cash you receive is loan proceeds, not income. You’re borrowing against your house, not earning money.
– You don’t owe income tax just because you pulled $100,000 out of your home.
– The bank gives you cash, but you also take on a larger mortgage balance. For tax purposes, your net worth hasn’t “increased” in a way that counts as taxable income.
So there is no income tax penalty on receiving or using that $100,000, regardless of whether you use it to pay off your fiancée’s mortgage, buy a car, or renovate your kitchen.
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2. Could this be treated as a taxable gift?
Where tax questions do come into play is on the gift tax side, not income tax.
If:
– the house is only in your fiancée’s name, and
– you use your borrowed money to pay off her mortgage,
then for tax purposes, you’re effectively transferring $100,000 of value to her. That looks like a gift.
Key points about U.S. gift tax rules:
– Each year, you can give up to a certain annual exclusion amount to any individual without needing to file a gift tax return. (This number is adjusted periodically; check the current year’s limit.)
– Amounts above that exclusion to one person in a year are not automatically taxed, but they do require filing a gift tax return (Form 709).
– The amount over the annual exclusion simply reduces your lifetime unified credit (the large lifetime exemption against estate and gift taxes). Most people never come close to using that entire lifetime exemption.
Practically:
– Paying off a $100,000 mortgage for a non‑spouse usually counts as a taxable gift in the technical sense.
– That doesn’t mean you write a check to the IRS; it means:
– you may need to file a gift tax return, and
– the excess over the annual exclusion chips away at your lifetime exemption.
Because you’re not married yet, she is not considered your spouse for unlimited marital gift purposes. If you were already legally married, different rules would apply, especially if you’re both U.S. citizens.
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3. What about mortgage interest deductions?
There are two different mortgages to think about:
1. Your new refinanced mortgage (with the extra $100k)
2. Her old mortgage that gets paid off
Your refinanced mortgage
From a tax perspective, mortgage interest is generally deductible on qualified residence interest:
– Debt that is secured by your home; and
– Used to buy, build, or substantially improve your main home or a second home, within the current limits for tax‑favored mortgage debt.
However, when you do a cash‑out refinance and use the proceeds for something unrelated to buying or improving your own home, the ability to deduct interest on the cash‑out portion becomes limited or disappears under current rules.
Paying off someone else’s mortgage (on a house you don’t own and don’t live in as your second home) is not considered improving your house. So while:
– The mortgage is secured by your home,
– The use of funds is to help your fiancée, not to improve your residence.
Result: Interest attributable to that extra $100k may not be deductible as mortgage interest, depending on the specifics and current law. The portion of interest related to the original principal that was used to buy or improve your own residence remains subject to the normal deduction rules.
Her paid‑off mortgage
Once you pay off her mortgage in full, there is no more interest to deduct on that loan going forward. So she loses her future mortgage interest deductions. That may or may not matter depending on whether she was itemizing deductions at all.
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4. Who owns what after this transaction?
Another non‑tax, but very important point: ownership and legal rights.
If:
– You take out $100,000 of additional debt on your house, and
– That money wipes out the mortgage on a property owned solely by your fiancée,
then:
– You now carry a bigger loan on your property.
– She now owns her house free and clear (unless your name is added to the title).
– In the event of break‑up or dispute, you might have no legal claim to her property, even though you effectively funded it.
To better align risks and benefits, many couples consider:
– Adding the contributing partner to the title of the second house, or
– Signing a written agreement that spells out what happens if they separate, sell, or one person contributes more than the other,
– Timing a change in property ownership around the date of marriage if that fits their plans.
These are legal decisions with long‑term consequences, so speaking with a lawyer before moving large sums can be very helpful.
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5. Impact on your long‑term financial picture
While the tax and legal angles matter, you should also look at the bigger financial picture of your plan:
– You’re planning to sell both houses in about five years and then relocate.
– By paying off her horrible-rate mortgage with your cheaper cash‑out refinance, you save roughly $800-$1,000 per month in cash flow.
Questions to consider:
1. Break‑even on closing costs
Refinances often come with closing costs, fees, and possibly a higher rate because it’s a cash‑out and/or an ARM.
– Calculate how many months of $800-$1,000 savings it takes to fully recover those costs.
2. ARM risk vs. time horizon
If your ARM rate could adjust before you sell:
– Are you comfortable with possible payment increases?
– What if your plans change and you don’t sell in 5 years?
3. Concentration of risk
By moving her mortgage onto your home, you:
– Concentrate more debt on one property.
– Increase risk if housing prices fall or if one of you loses income.
Even if the monthly savings look attractive, stress-test the plan under less optimistic scenarios.
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6. Could you structure this differently?
There are a few alternatives that might change the tax or legal implications while still addressing the cash flow problem:
1. Joint refinance or joint ownership of her house
– Add your name to her deed and refinance her property instead of yours.
– You might still help her secure a better rate if your credit and income are stronger.
– This can align legal ownership with your financial contribution.
2. Wait until after marriage
– Once married, transfers between spouses generally enjoy much more favorable gift tax treatment, especially for U.S. citizen spouses.
– You could consider timing the payoff after the wedding, depending on your timeline and what interest rate changes do to your costs.
3. Partial payoff / structured support
– Instead of wiping out the mortgage, you could contribute a smaller amount toward principal reduction or temporarily help with monthly payments.
– That reduces the size of any one‑time gift and may avoid a large gift tax reporting event.
4. Formal loan instead of a gift
– In some cases, people formalize the transfer as a loan to their partner, with written terms.
– Interest rates and documentation rules have to be followed if you want the IRS to treat it as a real loan, not a disguised gift.
– This adds complexity but can clarify expectations if the relationship or living situation changes.
Each approach has trade‑offs involving trust, legal rights, and administrative burden.
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7. How this affects your joint tax filing once married
If you do marry and later file taxes jointly:
– The interest deduction on your refinanced mortgage will belong to both of you on a joint return, but, as noted, the interest on the $100k cash‑out portion might still not qualify as deductible mortgage interest under current rules.
– The prior gift (if the payoff happens before marriage) remains what it was at the time it was made. Marriage later doesn’t retroactively erase a large gift or the need to have filed a gift tax return.
However, once married, you may find it easier to optimize finances as a single economic unit:
– Coordinating which property to keep as a primary residence if one is sold later.
– Deciding how to split ownership going forward so that each partner’s contributions are reflected in title.
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8. Record‑keeping and documentation
If you go ahead with this plan:
– Keep the closing statement and all documents from your refinance.
– Document the transfer of funds that paid off her mortgage (bank transfers, payoff statement, etc.).
– If this is treated as a gift, keep a copy of any gift tax return you file.
– Maintain a simple written summary of the transaction and your shared understanding (even if it’s informal), so both of you remember the rationale and expectations years later.
Good records help:
– In case the IRS ever has questions about large money movements.
– If there are disagreements about who contributed what to which property.
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9. Summary
– The $100,000 you pull out in a refinance is not taxable income, so there is no income tax “penalty” just for using it to pay off your fiancée’s mortgage.
– From a tax standpoint, paying off her mortgage with your funds is likely treated as a gift to her, because you’re not yet married and she alone owns the home. That can trigger a gift tax filing requirement, though most people won’t actually pay gift tax because of the large lifetime exemption.
– The interest on the $100,000 portion of your new mortgage is unlikely to qualify as deductible mortgage interest, since the funds are not used to buy or improve your own residence.
– Legally, you would be taking on more debt secured by your house while improving the equity in an asset she owns. Think carefully about ownership, risk, and what happens if plans or relationships change.
– The plan can make financial sense if the interest savings and improved cash flow outweigh the risks, fees, and loss of certain tax benefits-but it’s worth running the numbers and considering alternative structures.
For personalized advice, it’s wise to consult both a tax professional and a real‑estate or family‑law attorney before moving forward with a six‑figure transfer of this kind.