Cross-Border Tax Guidance for Americans in Spain, Portugal & International Organizations
Helping Americans abroad navigate U.S. tax filings, foreign reporting, residency transitions, and cross-border tax planning with clarity and confidence.
Choose Your Path
Which Situation Describes You?
We specialize in three distinct expat situations. Select yours to see how we can help.
Living in Spain
Tax planning and compliance for Americans relocating to or living in Spain. Beckham Law, Modelo 720, FEIE vs FTC, and autonomous worker guidance.
Living in Portugal
U.S.-Portugal tax coordination, NHR/IFICI guidance, and expat tax support. Comprehensive cross-border planning for American expats in Portugal.
UN & International Organization Staff
Specialized support for UN employees, international civil servants, and globally mobile professionals. Tax equalization, SECA/FICA analysis, and treaty navigation.
IRS Enrolled Agent
Licensed to practice before the IRS
Meet the Founder
Meet Rhymus Lizo
I am an IRS Enrolled Agent with nearly two decades of experience helping Americans navigate the complexities of living, working, and retiring abroad. After a staff appointment in the United Nations Income Tax Unit, I built Lizo Tax Consulting to offer something I could not find elsewhere: truly specialized cross-border tax guidance delivered with warmth and clarity.
Former UN Income Tax Unit
Six years inside the UN, including direct work with the Income Tax Unit. I understand staff assessment, tax equalization, and the real challenges UN employees face from the inside.
Living the Expat Life
I live in Spain personally. I file U.S. taxes from abroad every year. I understand the 183-day rule, Modelo 720 anxiety, and the feeling of explaining your life to an accountant who has never left their hometown.
Real Human Guidance
My clients are not case numbers. They are families starting new chapters, professionals navigating international careers, and retirees discovering their next home. I treat every situation with the care it deserves.
What We Do
Services Snapshot
Comprehensive U.S. expat tax services delivered with precision, clarity, and a deep understanding of cross-border life.
U.S. Expat Tax Returns
FBAR Compliance
Streamlined Filing Procedures
Tax Residency Planning
Foreign Tax Credit Planning
FEIE Strategy
UN Employee Tax Services
IRS Representation
Cross-Border Tax Planning
Why Lizo Tax
International Tax Guidance Built Around Real Expat Life
We are not a generic accounting firm. We are U.S. expat tax specialists who understand the real challenges Americans face when living in Spain, Portugal, or working for international organizations. Our founder, Rhymus Lizo, is an IRS Enrolled Agent with insider UN Income Tax Unit experience and a personal understanding of cross-border life.
IRS Enrolled Agent
Licensed to represent taxpayers before the IRS in audits, appeals, and collections.
Former UN Income Tax Unit
Six years of insider UN experience, including a staff appointment in the UN Income Tax Unit.
Spain & Portugal Focused
Deep expertise in Spanish and Portuguese tax systems, residency rules, and cross-border planning.
Cross-Border Tax Planning
FEIE, FTC, totalization agreements, treaty navigation, and dual-residency structuring.
FBAR & Streamlined Expert
Help expats return to compliance through the Streamlined Foreign Offshore Procedures.
Client-First Approach
Clear explanations, transparent flat-fee pricing, and year-round availability.
Client Stories
Trusted by Americans Around the World
Real clients, real experiences, real results across every continent.
"I'm an expat living in Portugal. We must file in BOTH Portugal and the US which can be very difficult. Finding a US tax expert knowledgeable on the impact of being a US citizen living in Portugal is very difficult to find. I was so fortunate to locate Lizo Tax Consulting! Not only was Rhymus easy to work with, he is VERY knowledgeable and saved me paying additional taxes!"
Karen
American Expat in Portugal
"I've been using Lizo Tax Consulting for almost two decades and I have nothing but praises for this company. They've managed to navigate my tax situation year after year and provided great advice for new financial challenges over the horizon. Highly recommended!"
John G.
Long-term Client
"I highly recommend Lizo Tax Consulting. I have been a longstanding client of this company and all my tax needs are always met with meticulous care. Rhymus is reliable, honest, and works with integrity. Five stars and more."
Freya Castillo
UN Employee
"Rhymus at Lizo Tax Consulting has been helping me with taxes for years! 10/10 highly recommend."
Jose Perea
American Expat
"Such great service and a really nice guy. I will be coming back every year."
Jeremy Galvan
Satisfied Client
"Thank you for making the process smooth even with all the questions I had about my self employment."
Bryan Meraz
Self-Employed Client
Free Resources
Downloadable Guides
Expert-written guides to help you navigate your specific expat tax situation. Get them free — just tell us where to send them.
Moving to Spain Without Getting Tax Screwed
The essential guide for Americans planning a move to Spain. Covers residency rules, tax treaties, Beckham Law, and common mistakes to avoid.
U.S. Tax Guide for Americans in Portugal
Everything Americans in Portugal need to know about U.S. tax filing, NHR/IFICI coordination, FBAR, and dual-residency planning.
UN Employee Tax Survival Guide
Designed specifically for UN employees and international civil servants. Covers SECA/FICA, tax equalization, treaty benefits, and common compliance pitfalls.
Get Clarity Before Small Tax Mistakes Become Expensive Problems
Whether you are already abroad or planning a move, a single conversation can save you thousands. Schedule a strategy session with an IRS Enrolled Agent who understands your situation.
Flat-fee pricing · Year-round availability · No surprises