Practice Areas

International Taxation .

EU officials, UN and OECD staff, diplomats, and retirees from international organizations trust us because we specialize in the intersection of Spanish tax law, international tax law, and various special tax regimes.

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The Subject

When your life crosses a border, tax rules are no longer obvious.

You work for an international organization, live in two countries, or your company generates revenue abroad. Double taxation treaties, the EU Protocol on Privileges, tax residency, IRNR, Form 720: this is an area where a single mistake can cost you tens of thousands of euros.

We are Spain’s leading law firm specializing in tax matters for diplomats and European and international civil servants, representing our clients’ interests all the way to the European Commission.

Officials and staff of the EU, the UN, the OECD, multilateral organizations (and their retirees), and diplomats.
Digital nomads and remote workers with tax ties to Spain.
SMEs and entrepreneurs with international operations, structures, or revenue.
Diplomatic personnel and high-net-worth individuals with cross-border assets.

Cases where we make a difference.

UN Pensions

Up to €150,000 recoverable

UN pensioners were paying taxes on 100% of their pension when part of it should have been tax-exempt. We reviewed the case and recovered the overpaid amount within the deadline.

EU officials

Proceedings before the European Commission

Our complaint has led to the initiation of an infringement proceeding against Spain for tax discrimination against European civil servants.

The Beckham Act

Second Complaint Filed with Brussels

We are defending impatriates covered by the special regime by filing a second complaint with the European Commission.

How We Work

From Diagnosis to Advocacy.

Actual Diagnosis

We analyze your situation in light of tax treaties and domestic tax laws, and let you know why you're overpaying.

Strategy Based on Numbers

We design the best tax strategy for you, calculate how much you'll save, how much you can recover, and within what timeframes.

Enforcement and Defense

We file, resolve, and, if necessary, litigate—against the tax authorities and before the European Commission.

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Why Riera Consulting.

Monograph on the Taxation of International and European Civil Servants

Original scholarly work published by Aranzadi on the taxation of European and international civil servants and officials.

True fighting spirit

We don't just provide advice: we litigate against the tax authorities and file complaints with the European Commission. And we get results.

International Capacity

Fluency in four languages (ES/EN/DE/FR) and a solid understanding of cross-border taxation.

Preguntas frecuentes

Your questions, answered.

It depends on where your tax residence is—which doesn’t always match where you live. Even if you’ve been away for some time, the tax authorities may still consider you a resident. We assess this on a case-by-case basis and, if appropriate, bring your status into compliance.

It has specific tax treatment that depends on the paying agency and the applicable agreement. Most firms are unaware of this and apply the general tax regime, which usually results in overpayment.

It’s not enough to simply feel like you’re “just passing through.” There are objective criteria (number of days spent in the country, center of interests) that determine your residency status. We’ll tell you exactly where you’re taxed and how to optimize your tax situation legally.

If you exceed certain thresholds, yes: Form 720 is mandatory, and failure to file it has resulted in very high penalties. We review your reporting obligations and file them correctly.

Call or write to us to tell us about your situation— no obligation.

A tax attorney reviews your situation and tells you, with specific figures, how much you can save or get back.

Request a consultation 965 92 91 94