A loan from a foreign family member does not, by itself, trigger IRS reporting on Form 3520. Gifts do. That distinction is where families get into trouble: if your $80,000 "loan" from an uncle in São Paulo has no note, no interest, and no repayment history, the IRS can treat the whole transfer as a gift instead of a loan. Gifts from a nonresident alien individual, combined with gifts from anyone related to that person, that exceed $100,000 in a single year must be reported on Form 3520. Miss the deadline and the penalty starts at 5% of the amount per month, capping at 25%.
The fix is not complicated, but it does take paperwork most families skip. You need a written note, a real interest rate, a repayment schedule your family actually follows, and proof that money moved both directions. Here is what determines which side of that line you land on, and how to stay on the right one.
Who Counts as a "Foreign" Family Member Here
For Form 3520 purposes, a foreign family member is a nonresident alien: someone who is not a U.S. citizen and does not meet the IRS substantial presence or green card tests for U.S. residency. A parent living in Manila, a sibling in Lagos, a grandparent who split time abroad and never obtained a green card all qualify. A relative who holds a green card or otherwise counts as a U.S. resident for tax purposes does not trigger these foreign-gift rules, even if they wire money from an overseas account.
This matters because the entire analysis below only applies when the money originates from someone the IRS treats as outside the U.S. tax system. If your lender is a U.S. citizen living abroad, you are looking at ordinary domestic family-loan rules instead, including the Applicable Federal Rate.
Why a Real Loan Skips Form 3520 (and a Fake One Doesn't)
The IRS instructions for Form 3520 require reporting of gifts and bequests from foreign persons, and separately, transactions with foreign trusts. A personal loan from a foreign relative who is not a trust falls into neither category, as long as it is genuinely a loan. There is no equivalent of the trust world's "qualified obligation" rule for individual-to-individual loans: no requirement to extend the statute of limitations, no annual filing to keep the loan classification alive.
That silence is exactly the risk. Because the form does not ask about loans, there is no official checklist that certifies yours qualifies. If the IRS later decides the transfer walked and talked like a gift, it reclassifies the full amount, and you are the one who under-reported.
The reporting threshold itself is aggregated, which surprises people who split money across relatives to stay under it. The IRS looks at "the aggregate amount received from that nonresident alien or foreign estate, or foreign person that you know or have reason to know are related to" the giver. Receive $60,000 from your mother and $50,000 from your father in the same year, and that is $110,000 from related foreign persons, over the threshold, even though neither transfer alone crossed it.
One detail most articles on this topic skip: the $100,000 threshold is specific to gifts from individuals and estates. If the money instead comes from a foreign corporation or partnership, such as a family business incorporated abroad, the threshold is far lower: $20,116 for 2025 and $20,573 for 2026. Families who route a loan through a relative's overseas company rather than the relative personally need to check the lower figure, not the six-figure one.
The Documentation That Keeps a Loan a Loan
Neither Form 3520 nor its instructions spell out a bright-line test for loan versus gift at the individual level. Courts and the IRS fall back on the same substance-over-form factors used for domestic family loans, weighted more heavily here because there is no third-party paper trail like a bank's loan file.
| Factor | Supports "loan" | Supports "gift" |
|---|---|---|
| Written agreement | Signed promissory note with terms | Nothing in writing, or a vague text message |
| Interest rate | At or above the Applicable Federal Rate | 0%, with no adjustment for the missing interest |
| Repayment schedule | Fixed maturity date and payment intervals | "Whenever you can" or no schedule at all |
| Actual payments | Documented transfers back to the lender, on schedule | No payments made, or payments only after IRS inquiry |
| Consequences of default | A stated remedy if payments stop | No plan; the lender says they'd "never really enforce it" |
A written promissory note is the single highest-leverage document here. It should specify the principal, the interest rate, the currency, the repayment schedule, and what happens on default, and both parties should sign it before money moves, not after.
Interest matters more for a foreign loan than a domestic one. For a loan between two U.S. taxpayers, an interest-free loan mainly triggers imputed interest rules on the lender's tax return. When the lender is a nonresident alien with no U.S. filing obligation, that enforcement mechanism is largely absent, which is exactly why an examiner treats a 0% "loan" from abroad with more suspicion, not less. Charging at least the AFR is one of the clearest signals you have that this was a loan and not a disguised gift.
A Worked Scenario: $150,000 From a Parent in the Philippines
Say your mother in Manila wires $150,000 toward your home down payment. Structured as a gift, that single transfer already blows past the $100,000 threshold on its own, meaning you would need to file Form 3520 by the tax filing deadline (generally April 15, with an automatic extension to June 15 for taxpayers abroad, and up to October 15 with a filed extension). No tax would be owed since the U.S. does not tax gift recipients, but the form is still mandatory, and missing it is what triggers the penalty.
Structured as a loan instead, at an interest rate at or above the current AFR, documented with a signed note and an amortization schedule you both keep, that same $150,000 requires no Form 3520 filing at all. The only ongoing obligation is behaving like a real loan: making the scheduled payments and keeping records that prove it. Run the actual payment breakdown through the family loan calculator before you set the terms, so the monthly payment is one your family can realistically sustain for the life of the loan.
If the IRS Recharacterizes It as a Gift
An examiner who decides your "loan" was really a gift does not just adjust your loan basis. They treat the transfer as if it were a gift from day one, apply the $100,000 threshold, and assess the Form 3520 late-filing penalty if you never reported it: 5% of the gift's value for each month the form is late, up to a maximum of 25%. On a $150,000 transfer, that ceiling alone is $37,500, separate from any interest the IRS charges on the delay.
The IRS can abate the penalty for reasonable cause, but "we always meant to pay it back eventually" is not a strong argument if there is no note, no schedule, and no payment history to back it up. This is a case where the documentation you create at the start of the loan is the same documentation that protects you if the loan is ever questioned years later.
Forgiving It Later Reopens the Same Question
Families change their minds. A parent who lent $80,000 for a business decides, three years in, to forgive what is left. Domestically, forgiving a family loan runs into the U.S. gift tax rules on the lender's side. When the lender is a nonresident alien, U.S. gift tax generally does not apply to a gift of cash or other intangible property they make, since gift tax on nonresident aliens is limited to U.S.-situs real and tangible property.
That does not make the forgiveness a non-event for you. Forgiven debt is still a gift received, and if the forgiven balance combined with anything else you received from that relative (or people related to them) that year exceeds $100,000, you are back to a Form 3520 filing, this time for the forgiveness itself. Treat a partial or full forgiveness as its own reportable event, and check the aggregate for the year it happens in, not just the year the loan originated.
Keeping the Paper Trail Without the Headache
The documentation burden here is real, but it is not exotic. It is the same discipline any well-run family loan needs, with two additions specific to a cross-border transfer: keep the wire confirmation showing the sender, the amount, and the date, and note the currency conversion rate used if the loan was made in a foreign currency and repaid in dollars, or vice versa.
A signed note removes the biggest point of ambiguity, so generate a family loan agreement before the money moves rather than after a question comes up. From there, track every payment against the schedule so you have a running, timestamped record rather than a shoebox of bank statements to reconstruct later if the loan is ever questioned.
This article explains general IRS reporting concepts and is not tax or legal advice. Cross-border loans involve currency, residency, and treaty questions that vary by country. Talk to a CPA or attorney who handles international tax before you structure a loan with a foreign relative.
