Form 1040-NR after giving up US status in Spain

For a US retiree in Spain, giving up US status is often described as the end of the American tax system. That is too broad. A US citizen who renounces, or a green-card holder who formally abandons the card with Form I-407, generally stops filing the ordinary Form 1040 on worldwide income once the expatriation year is handled. But if US-source income remains, the next return may simply be a narrower one: Form 1040-NR, the nonresident alien return.

This page is not another FIRPTA page. FIRPTA is the most visible 1040-NR trigger because a US property sale can trap 15% of the gross price at closing. Here the focus is the wider post-expatriation file: US dividends, US pensions or annuities, US Social Security withholding, rental income from a US property, income connected with a US business, treaty claims, Form 1042-S, ITINs and the Spanish IRPF return that still taxes worldwide income if you live here.

The useful mental shift is this: before expatriation the question was "what did I earn anywhere in the world?" After expatriation the US question is usually "what did I earn from the United States, and is it FDAP or ECI?" Spain asks a different question. If you are Spanish tax resident, Spain still looks at the whole world.

"The client hears 'I am no longer American for tax' and assumes there is no US return at all. The cleaner sentence is narrower: you are no longer taxed by the United States on your worldwide income, but US-source income can still follow you to Spain. That is where Form 1040-NR lives."

The short answer

After a US citizen renounces or a green-card holder formally abandons lawful permanent residence, they are generally a nonresident alien for US income tax. A nonresident alien usually files Form 1040-NR when they have US-source income that must be reported, tax withheld that needs to be reconciled, effectively connected income, or a treaty position that must be shown on the return.

The return is narrower than Form 1040. It does not pull in your Spanish bank interest, Spanish pension, Spanish rental income or ordinary non-US portfolio gains merely because you live in Spain. But it also does not vanish just because you left the US tax-resident category. US-source items remain inside the American system, and some of them are taxed by withholding before you ever file.

When Form 1040-NR replaces Form 1040

There is a status line. While you are a US citizen or a lawful permanent resident, you remain inside the normal US filing obligation for Americans in Spain: Form 1040, worldwide income, FBAR, Form 8938 where thresholds are met, and the foreign tax credit or treaty mechanics to reduce double taxation. A Spanish address does not change that, and neither does the Spanish nationality oath by itself.

The line moves only when US status legally ends. For a citizen, that is the US expatriation process and Certificate of Loss of Nationality described in our renunciation guide. For a green-card holder, it is formal abandonment or loss of the card, most commonly filing Form I-407. In the expatriation year itself, special rules and Form 8854 can still apply. For later years, the question becomes whether US-source income requires a nonresident return.

That is the clean distinction from W-9 vs W-8BEN certification. Before the status line moves, you are a US person and give US institutions a W-9. After the line moves, a former US person may become a foreign person for withholding documentation and may use Form W-8BEN for the right income stream, subject to treaty residence and beneficial-owner rules.

What stops being US-reportable

The headline benefit of becoming a nonresident alien is that the United States no longer taxes you as a citizen or resident on worldwide income. A Spanish pension earned after expatriation, Spanish bank interest, rent from a Spanish flat, a gain on a Spanish brokerage account, or a French fund held through a Spanish bank are not automatically pulled into the US return simply because you once had US status.

That matters most for the information-reporting forms that made life abroad heavy. FBAR and Form 8938 are US-person reporting regimes. A true former US citizen or former green-card holder is no longer filing them as a US person in later years. The same is true for many US-only international information forms, unless a specific post-expatriation rule applies. This is one reason the compliance clean-up must happen before expatriation: once you leave, it is much harder to repair the five-year certification failure that could have made you a covered expatriate.

The end of worldwide US reporting does not change Spanish residence. If you live in Spain and meet Spanish tax-residence rules, Spain still taxes worldwide income. Renunciation can narrow the US side, but it does not make a Roth IRA tax-free in Spain, does not erase Modelo 720 for a Spanish resident, and does not make foreign assets invisible to Spanish wealth-tax analysis.

FDAP: gross withholding income

The first nonresident bucket is FDAP: fixed, determinable, annual or periodical US-source income that is not effectively connected with a US trade or business. In retiree files it commonly includes US dividends, certain US-source interest, royalties, pensions, annuities and Social Security-type payments. The default rule is blunt: FDAP is taxed on a gross basis, often by withholding at 30% or a lower treaty rate. There are no ordinary deductions against that gross amount.

This is why the payer paperwork matters. A US broker, pension payer, insurer or withholding agent needs the right foreign-person certification, usually Form W-8BEN, and may issue Form 1042-S rather than the familiar 1099. If tax was withheld correctly at source and no return position is needed, the withholding may be the practical end of the US process for that item. If the withholding was too high, a treaty rate was not applied, or the income must be reported for another reason, Form 1040-NR is how the item is reconciled.

US Social Security has its own withholding pattern for nonresident aliens: a portion of the benefit is taxable and withholding can be taken at source. Private pensions and annuities need separate treaty review. Dividends often keep source-country withholding within treaty limits. Interest may be exempt or reduced depending on the precise item. The point is not that every US-source payment creates a 1040-NR. The point is that every US-source payment needs to be classified before anyone says the US is finished.

ECI: net income on the return

The second bucket is effectively connected income, or ECI. ECI is taxed differently. Instead of a flat gross withholding model, it is reported on Form 1040-NR on a net basis and taxed at graduated rates, broadly like the income of a US person after allowable deductions. That can be better or worse depending on the facts, but it is a different architecture.

For a retiree in Spain, ECI can appear when there is a US trade or business footprint, a US partnership or LLC allocation, compensation tied to services performed in the United States, rental income that has been elected into net-basis treatment, or a US real-property sale treated as connected under the FIRPTA rules. This page does not turn passive retirement into business income; it flags the cases where a former US person keeps a US asset or entity that continues to produce return-filing obligations.

The LLC and S-corp cases are especially sensitive. Our page on US LLCs, S corporations and K-1 income after moving to Spain explains the Spanish classification problem. After expatriation there is an added US status problem: an S corporation cannot have a nonresident alien shareholder, and the US election can terminate. One decision about citizenship can change both the US entity and the Spanish reading of the income.

The US rental-property election

US rental property is the common 1040-NR case that is not a sale. A former green-card holder moves to Spain, keeps the old house, rents it out, and assumes the US return ended. It did not. US real-property rental income is US-source income. Without the right treatment it can be treated as FDAP, taxed on the gross rent with no mortgage interest, repairs, insurance, property tax, management fees or depreciation deducted. That can be catastrophic where the net profit is small.

The usual fix is the section 871(d) election, which treats the rental income from US real property as effectively connected income. That moves the item onto the net-basis track: income and expenses are reported on Form 1040-NR, and the tax is computed on the net result. The election is not just a sentence in an email. It has to be validly made and then continues for later years until revoked, so it becomes part of the annual nonresident return workflow.

Rental income also has a Spanish side. If you are Spanish tax resident, Spain taxes worldwide rental income, including rent from the US home, with Spanish rules for deductible expenses, currency conversion and timing. The US tax may create a credit in Spain within limits, but the computations will not be identical. Read this together with the page on renting a US home after becoming a Spanish resident.

Treaty claims, 1042-S and W-8BEN

Once you are no longer a US person, the US-Spain income tax treaty becomes more directly useful on the US side because the saving clause no longer lets the United States tax you as its own citizen. But treaty relief is not self-executing magic. The withholding agent often needs a correctly completed W-8BEN, with Spain as treaty residence where appropriate, before applying a reduced rate. The year-end record may be Form 1042-S, not Form 1099.

Form 1040-NR is where treaty claims can be reported or reconciled when withholding did not match the treaty position. The return includes Schedule OI information and Schedule NEC for income not effectively connected with a US trade or business. If a payer withheld 30% when a treaty-limited rate should have applied, the return may be the only way to claim the excess back. If a treaty position reduces or modifies US tax on a pension, annuity, Social Security-type payment, dividend, royalty or similar FDAP item, it should be documented with the same seriousness as any other cross-border filing position.

Do not import the pre-expatriation form habit. A US citizen in Spain gives a US broker a W-9, not a W-8BEN. A former US citizen or former green-card holder may use W-8BEN only after the status actually changed. Signing it early is false certification; signing it late can leave avoidable withholding in place.

How Spain still taxes the same year

For Spanish tax residents, Spain taxes worldwide income whether or not the US return is Form 1040 or Form 1040-NR. That means the Spanish return still picks up the US dividend, US rent, US pension, US Social Security payment or US real-estate gain according to Spanish rules. The US return is narrower after expatriation, but the Spanish return is not.

The coordination changes, though. Before expatriation, many treaty articles were complicated by the US saving clause and relief often ran through the US foreign tax credit. After expatriation, the treaty allocation can bite more cleanly because you are no longer a US citizen or resident. Some items may be taxed mainly or only in Spain, some may keep US withholding, and US real property remains a special source-country asset. The Spanish foreign-tax-credit calculation then depends on what US tax was actually imposed on the same item, in the same year, and not merely on paper.

The cash-flow mismatch remains. US withholding can happen during the year on 1042-S income, rent can require US estimated payments or withholding, and FIRPTA can freeze cash at closing. Spain's IRPF return follows the Spanish calendar. A retiree who expects renunciation to simplify everything immediately often discovers that the first post-expatriation year needs more coordination, not less.

A practical post-expatriation workflow

Build a short post-expatriation income map before the first nonresident year. List every US connection that survives the CLN or I-407: US home, rental property, brokerage account, dividend-paying US shares, US pension or annuity, Social Security, IRA or 401(k), partnership, LLC, S corporation, trust, royalty, deferred compensation and any pending property sale. Then mark each item as no US-source issue, FDAP, ECI, rental election, FIRPTA, treaty claim, or entity-specific review.

Next, match paperwork to each item. A former US person may need W-8BEN certifications, Forms 1042-S, a Form 1040-NR, Schedule NEC, Schedule OI, an ITIN or retained SSN use where still valid, a section 871(d) election, Forms 8288/8288-A from a closing, or a Form 8288-B withholding certificate. The workflow is not the same as the old Form 1040 package, and reusing old assumptions is where refunds get lost.

Finally, hand the same map to the Spanish preparer. Spain needs the gross income, foreign tax withheld, exchange-rate treatment, deductible expenses under Spanish law, and timing. The US document may say 1042-S or 1040-NR, but the Spanish return needs to know what the money was. "US tax withheld" is not a category; it is a credit question.

At a glance

Item after expatriation	Typical US treatment	Spanish planning note
Spanish bank interest or Spanish pension	Usually outside Form 1040-NR if not US-source	Still reported in Spain if tax resident
US dividends	FDAP, gross withholding unless treaty rate applies	Spain reports the dividend and reviews credit for US tax
US Social Security	Special NRA withholding/reporting treatment	Do not treat as a private pension without treaty review
US private pension or annuity	FDAP/treaty analysis; Form 1042-S may replace 1099	Spain may have primary residence-country taxation
US rental property	Gross FDAP unless section 871(d) election makes it ECI	Spain taxes worldwide rent with its own expense rules
US real-property sale	FIRPTA withholding plus Form 1040-NR reconciliation	Spain taxes worldwide capital gain if resident
US LLC or partnership income	Potential ECI/K-1 and entity-specific filing	Spanish transparency/opacity analysis required
US S corporation shares	Nonresident alien shareholder can terminate S status	May change Spanish entity characterisation too
Foreign accounts after true expatriation	No FBAR/Form 8938 as US person in later years	Modelo 720 and wealth tax may still apply in Spain

Sources reviewed July 2026: IRS Publication 519 and IRS pages on nonresident alien taxation, Form 1040-NR, effectively connected income, FDAP income, characterization of income of nonresident aliens, treaty claims, Form 1042-S reporting, ITINs and US real-property rental elections under IRC §871(d); IRS/Treasury materials on the United States-Spain income tax treaty and treaty tables; IRS materials on expatriation, Form 8854 and abandonment of lawful permanent residence; and, on the Spanish side, IRPF worldwide-income rules, foreign-tax-credit principles, Modelo 720 and wealth-tax reporting for Spanish tax residents. Rates, withholding procedures, treaty interpretation and form instructions change. This is general information only, not legal, tax, financial or immigration advice, and not US tax advice. Confirm the treatment of any specific income stream with qualified US and Spanish tax advisers before filing or changing withholding forms.