Quick answer: the United States taxes its citizens on worldwide income and measures everything in dollars, which produces two consequences no other buyer on this site faces. A euro mortgage is a separate taxable transaction from the house it financed, and Italy’s five-year capital gains exemption is worth nothing to an American because the IRS grants no matching relief and there is no Italian tax left to credit.
An Italian purchase presents an American buyer with a question that does not exist for anyone else in this cluster: what currency is the transaction actually in? The house is in euro. The tax return is in dollars. US law does not simply translate between them, it treats the translation itself as a set of taxable events.
What does section 988 actually do to a euro mortgage?
A foreign-currency loan is a section 988 transaction. The dollar amount borrowed is fixed at the exchange rate on the day the loan is drawn, and the dollar cost of repaying it is fixed at the rate on the day it is repaid or refinanced. If the dollar has strengthened against the euro in the interval, repaying the same euro balance costs fewer dollars, and that saving is an exchange gain.
It is taxed as ordinary income, not as capital gain, which means it is charged at marginal rates rather than at the preferential long-term rate. It arises whether or not the house has appreciated, and it arises on refinancing as well as on repayment.
Consider the shape of it on a €300,000 loan. Drawn when the euro is worth 1.15 dollars, the loan is 345,000 dollars. Repaid when the euro is worth 1.05, the same €300,000 costs 315,000 dollars to extinguish. The 30,000 dollar difference is exchange gain, and the American owes tax on it at their marginal rate in the year of repayment. Nothing about the Italian property has changed.
| Event | Euro | Rate | Dollars |
|---|---|---|---|
| Loan drawn | 300,000 | 1.15 | 345,000 |
| Loan repaid | 300,000 | 1.05 | 315,000 |
| Exchange gain | 0 | 30,000 taxable |
Can the loan and the house be treated as one transaction?
This is the argument taxpayers reach for and it has been tested. Section 988(d)(1) integrates a debt instrument with the transaction it hedges, and the Quijanos argued that a sterling mortgage on their UK residence hedged the property, so the two should be measured together.
The First Circuit rejected it in 1996. The mortgage was not conducted in a trade or business and was not entered into for profit, so the hedging provision did not reach it. The result, reported at 93 F.3d 26, is that a personal-residence mortgage in foreign currency stands alone for US tax purposes.
There is a statutory carve-out and it is narrower than people hope. Congress excluded from section 988 the exchange gain or loss of a US individual residing outside the United States on repaying a foreign-currency mortgage on their principal residence. An American living in Boston with a holiday apartment in Umbria fails both limbs: they do not reside abroad and the Italian house is not their principal residence.
- Red flag: advice that says “the mortgage nets against the property” without addressing Quijano and the residence limb
- The exposure crystallises on repayment or refinancing, not annually, so it can sit unnoticed for a decade
- Selling the house and repaying the loan in the same year produces two separate US calculations, not one
Why is Italy’s five-year exemption worthless to an American?
Italy stops taxing a private seller’s capital gain after 5 years of ownership under article 67 TUIR. For an Italian, a German or a Dutch seller that is a genuine exemption. For an American it produces the worst available combination.
The United States taxes the gain regardless of how long the property was held, because section 121’s exclusion applies to a principal residence and a second home does not qualify. And because Italy has charged nothing, there is no Italian tax to claim as a foreign tax credit. The American in year 6 pays full US capital gains tax with no offset, where the same American selling in year 3 would at least have had an Italian charge to credit.
That inverts the usual holding-period advice. For most foreign owners, waiting past the fifth anniversary is the single cheapest tax decision available. For an American it changes nothing on the US side and removes the credit on the Italian side.
The dollar-measurement problem compounds it. Basis is the dollar cost at the purchase-date rate and proceeds are the dollar amount at the sale-date rate, so a property that broke even in euro can produce a taxable dollar gain purely from currency movement. The Italian side of selling covers what the notary withholds and reports, which is a separate exercise from the US return.
- Run the disposal model in dollars from the first spreadsheet, not in euro with a conversion at the end
- Where the property was inherited, the US basis rules differ again and the Italian succession value is not automatically the US basis
- Expect to file the Italian and US calculations on different numbers and to be able to explain both
What does your state do, and why does the federal answer not settle it?
Federal tax is not the whole American tax system, and the state layer behaves differently in a way that catches people who moved for the weather rather than for the tax code.
A state that imposes income tax generally taxes residents on all income, including Italian rent and the gain on an Italian sale. What varies is relief. The foreign tax credit is a federal mechanism, and states are not obliged to mirror it. Several offer no credit for foreign taxes at all, which means the Italian 21% or 26% on rental income reduces the federal bill and does nothing to the state bill. The same euro of rent is then taxed in Italy, sheltered federally by the credit, and taxed again by the state with no relief.
The effect is not marginal in the high-rate states. A California resident faces a top marginal state rate above 13%, and New York City residents stack a city tax on top of a state rate above 10%. Against that, a Florida or Texas resident has no state income tax and the question disappears entirely.
| Resident of | State income tax | Foreign tax credit at state level |
|---|---|---|
| Florida, Texas, Nevada | None | Not applicable |
| California | Top rate above 13% | Not generally available for foreign taxes |
| New York | Top rate above 10%, plus city tax | Limited |
- Insider tip: ask the state question before the federal one if you live in a high-rate state, because it is the layer with no relief mechanism
- A planned relocation between states can change the answer more than any Italian election will
- State residency rules are their own subject and states audit departure aggressively
How does the currency problem repeat every year, not just at the end?
Section 988 is the dramatic version of a general rule, and the general rule applies annually. Every euro figure on a US return has to be translated into dollars, and the rate used is the rate at the time of the transaction rather than a convenient year-end figure.
Rent received monthly is translated at the rate on receipt. Italian tax paid is translated at the rate on payment. IMU, condominio charges and management fees are each translated on the date incurred. A year in which the euro moved 8% produces a US rental result measurably different from the euro result, and the foreign tax credit is computed on the dollar figures rather than the euro ones.
Two practical consequences follow. Records have to be kept transaction by transaction rather than as an annual euro summary, because reconstructing dates from a bank statement three years later is where accountants’ fees go. And the credit can strand: Italian tax paid in one calendar year against rent earned in a different one produces a mismatch that carries forward rather than netting, since the Italian and US tax years and payment schedules do not align.
- Keep the Italian bank statement and the rate on each date, not just the annual total
- Expect the US rental profit and the Italian one to differ, and expect to explain why
- Where Italian tax is withheld at source under the flat regime, the payment date is what matters for the credit year
One more asymmetry belongs here. A loss on the Italian letting is a passive activity loss for US purposes, so it is suspended rather than deducted against salary, and it releases only against future passive income or on a full disposal of the activity. An American modelling the early years of a renovation let, when costs exceed rent, should expect the deduction to arrive years after the spending does.
One further exposure sits outside the currency question entirely. An American who dies owning Italian property leaves an estate that two systems want to tax and two systems want to distribute, and the choice of governing law has to be made while alive rather than after. That is covered in Italian inheritance law for foreign owners.
Which buyer scenarios does this reshape?
The cash buyer. No section 988 exposure at all, because there is no foreign-currency debt. The remaining US complications are the disposal calculation and the reporting on the Italian bank account. This is why a striking share of American purchases in Italy complete without a mortgage even where the buyer could comfortably borrow, and the money transfer guide matters more to this profile than the mortgage one.
The leveraged buyer taking an Italian mutuo. Full exposure, and the decision framework is about time rather than rate. A loan held to term across a full currency cycle has a larger unmatched exposure than one repaid quickly. Compare the Italian rate advantage against an unhedged ordinary-income tax risk that nobody quotes at the offer stage. What an Italian lender will actually advance to a non-resident is covered in the mortgage guide.
The buyer letting the property. Italian rental tax is paid first, at 21% on the first short-let unit or 26% beyond it, or under ordinary IRPEF, as set out in the cedolare secca guide. The US return then reports the rent as foreign-source income with a credit for the Italian tax, so unlike the disposal case the credit machinery does work here. The mismatch to watch is timing: US and Italian tax years and payment dates do not align, and a credit claimed in the wrong year is a credit lost.
The buyer structuring through an entity. An Italian srl or a US LLC changes the reporting picture substantially, and not always favourably: a foreign entity can pull the owner into a separate and more demanding US filing regime. The company purchase guide covers the Italian side, and the US side belongs with a cross-border accountant before the structure exists rather than after.
For the purchase mechanics themselves, which are identical for every nationality, see the step-by-step sequence, and for why an American keeping their US residence pays Italy’s second-home rate, the prima casa comparison.
Frequently Asked Questions
Because US law does not treat the loan and the house as one transaction. Section 988 measures a foreign-currency debt in dollars when it is taken out and again when it is repaid, and the difference is exchange gain or loss in its own right. Repay a €300,000 mortgage after the dollar has strengthened and you have made a dollar profit on the debt, taxable as ordinary income, even though the house may have gone nowhere.
Section 988(d)(1) integrates a debt with the transaction it hedges, and taxpayers have argued that a mortgage hedges the house. The First Circuit rejected that argument in Quijano v. United States in 1996 for a sterling mortgage on a residence, because the borrowing was neither a trade or business nor entered into for profit. The reasoning applies equally to a euro loan on an Italian holiday home.
Generally not, and this asymmetry is the sharpest part of the rule. Gain on the debt is taxable, while a corresponding loss on personal-use property has no deduction. A US owner is exposed to one direction of the currency and unrelieved in the other, which is a materially different position from an Italian or German buyer holding the same asset.
In Italy, yes. In the United States, not at all. Article 67 TUIR exempts a private seller's gain after 5 years of ownership, so Italy asks for nothing in year 6. The IRS has no matching relief for a second home, since section 121 applies to a principal residence, so the American pays full US tax on a gain that Italy has already forgiven and has no Italian tax to credit against it.
In dollars at both ends, which is why the number can differ from the euro reality. Basis is the dollar cost at the exchange rate on the purchase date and the amount realised is the dollar proceeds at the rate on the sale date. A property bought and sold for the same euro figure produces a US taxable gain if the dollar weakened in between, and a US loss if it strengthened.
It removes the section 988 exposure entirely, which is the single largest US-specific complication, and it is the reason many American buyers who could borrow choose not to. The trade-off is opportunity cost on the capital and the loss of the currency hedge a euro loan provides against a euro asset. That is a real trade and the answer depends on the size of the position rather than on tax alone.
The house is real property held directly and is not itself an FBAR or Form 8938 item. The Italian bank account opened to run it is, once the aggregate crosses the reporting thresholds, and so is an Italian entity if the purchase is structured through one. This catches people who structured for Italian reasons without checking what the structure does to a US return.
No. The United States satisfies the reciprocity condition, so a US citizen buys on the same civil terms as an Italian one. Every complication on this page is written in the US tax code rather than in Italian law, which is the general pattern for foreign buyers here and worth internalising early.
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