Americans living in Spain warned over overlooked IRS filing rules

For many Americans living in Spain, moving abroad often feels like leaving behind the stress of the US tax system. But thousands of US citizens across the Costa del Sol, Costa Blanca,Mallorca and other parts of Spain are discovering that the IRS may still expect paperwork from them every single year, even if they already pay taxes in Spain.

The issue is catching out retirees, remote workers, property owners and long term residents who assumed their obligations ended once they left the United States.

Now, tax specialists working with expats say confusion around foreign bank accounts, overseas income and annual filing requirements is becoming increasingly common among Americans abroad.

Why Americans in Spain may still need to file US taxes

Unlike most countries, the United States taxes citizens based on citizenship rather than residency. That means many Americans living permanently in Spain may still need to submit annual US tax returns even if they have not lived in America for years.

According to official IRS guidance, US citizens abroad may also need to declare foreign bank accounts if the total balance across accounts exceeds certain thresholds during the year.

For some expats in Spain, this comes as a complete surprise. Many assume that once they become tax residents in Spain and begin
paying Spanish taxes, their US obligations automatically end.

Or, they do not. The foreign bank account rule many Americans overlook one of the biggest areas of confusion involves foreign bank account reporting, commonly linked to FBAR and FATCA requirements.

Americans living in Spain who hold current accounts, savings accounts or even joint accounts with family members may still need to report them to US authorities depending on balances held during the year.

Failure to file does not automatically mean somebody will face penalties, but specialists warn that ignoring the rules completely can
create serious problems later.

For many expats, the issue only emerges years later when trying to sell property, transfer money, inherit assets or return to the US.

Americans retiring to Spain are increasingly affected

Spain continues to attract American retirees looking for lower living costs, warmer weather and a slower pace of life. But financial experts say many newcomers underestimate how complicated cross border tax reporting can become.

Pensions, investment accounts, property income and even simple banking arrangements can create reporting obligations in both countries.

The growing number of Americans relocating to Spain has also increased demand for specialist advisers who understand both US and Spanish systems.

What this means for Americans living in Spain

For Americans already living in Spain, experts say the most important thing is not to panic, but not to ignore the issue either.

In many cases, people who were unaware of the rules may still be able to correct missing filings through existing IRS procedures designed for expats abroad.

The key problem, according to advisers, is that many Americans simply do not realise the rules apply to them at all.

Common mistakes Americans abroad make

Some of the most common misunderstandings include:

• • Assuming paying Spanish tax removes US filing obligations.
• • Forgetting to declare foreign bank accounts.• Believing small pensions or savings accounts do not matter.

  • Opening joint accounts without understanding reporting rules.

  • Ignoring IRS letters sent to old US addresses.

  • Thinking the rules only affect wealthy individuals.

Could this affect more Americans in Spain in 2026?

With more Americans relocating overseas and Spain remaining one of Europe’s most popular destinations for retirees and remote workers,
awareness around US tax obligations abroad is likely to become increasingly important.
For many expats, the biggest surprise is not necessarily paying additional tax, but simply discovering how much paperwork may still follow them after leaving the United States.