Hiring an international tax professional is fundamentally different from finding a domestic accountant—you need someone fluent in foreign earned income exclusions, FATCA requirements, and country-specific treaty provisions. Get this wrong, and you're facing penalties, missed deductions, or worse. Here's how to vet candidates who actually know what they're doing.
Verify Credentials for International Work
Start by checking whether they hold specific international certifications. Look for enrolled agents (EAs) with international tax specialization, CPAs with experience filing Forms 5471 (controlled foreign corporations), 8938 (foreign financial asset reporting), or FBAR disclosures. Ask directly: "How many expat clients do you serve annually, and in which countries?" A credible professional will give you specific numbers and geographies rather than vague answers.
Don't assume all CPAs handle international returns equally. Many domestic-focused firms treat expat taxes as an afterthought. You want someone who actively maintains expertise—that means continuing education credits in international tax, memberships in the American Expat Center or similar organizations, and recent client experience across multiple jurisdictions.
Ask Targeted Technical Questions
During initial calls, pose real scenarios to assess depth. Try these:
- "Walk me through how you'd handle passive foreign investment company (PFIC) reporting for someone holding foreign mutual funds."
- "What's your approach to calculating the foreign earned income exclusion for someone who worked in the UK for part of the year?"
- "Do you file FATCA forms, and if so, what's your process for identifying reportable foreign accounts?"
Weak answers—like "we'll figure it out" or generic responses about "maximizing deductions"—are red flags. Strong professionals explain methodology, mention specific forms, and reference treaty considerations without being asked. If they pause and need to check their resources, that's fine. If they deflect or oversimplify complex rules, move on.
Understand Their Service Model and Pricing
International tax preparation costs significantly more than standard returns. Expect to pay $2,500–$6,000 annually for a single expat with straightforward foreign employment and minimal assets. If you own a business abroad, hold rental property internationally, or have substantial investments, fees typically range $5,000–$15,000+. Get a written estimate that specifies which forms are included and whether they charge hourly ($200–$400/hour is typical) or flat fees.
Ask about their process: Do they use dedicated international tax software? Will they guide you on documentation requirements before filing? Do they offer year-round access, or just during tax season? A professional who requires you to provide perfectly organized records upfront likely expects you to handle prep work yourself—clarify whether that's included in their fee.
Check References and Verify Compliance History
Request references from expats in similar situations—same country, similar income level. Contact them. Ask whether the professional identified planning opportunities (like tax-efficient entity structuring), caught errors on prior returns, or helped with IRS correspondence.
Verify the professional's own compliance. Search their name on the IRS Office of Professional Responsibility website to check disciplinary history. For attorneys, check your state bar. A clean record doesn't guarantee competence, but violations or suspensions are disqualifying.
Confirm Ongoing Support Availability
International tax situations change mid-year—you get a work assignment to Singapore, a foreign account threshold crosses $10,000, you sell foreign real estate. Ask: "If I have a question in August, how do I reach you?" Reliable professionals maintain some availability between tax seasons for urgent matters, even if it's email-only.
Also confirm whether they'll represent you if the IRS asks questions about your return. Not all tax preparers offer representation; some will refer you to a separate CPA or EA for audit support.
Use a Comparison Service
If you're comparing multiple candidates, Mercoly helps you find and evaluate trusted international tax professionals side-by-side, making it easier to assess experience, pricing, and client reviews in one place.
Frequently Asked Questions
Q: What's the difference between an enrolled agent and a CPA for expat taxes? Enrolled agents specialize in IRS representation and often focus on individual tax returns, while CPAs can offer broader accounting and business advice. For expats, either credential works—what matters is their specific international tax background.
Q: How long should international tax preparation take? Straightforward cases (salary, standard deductions) typically take 2–4 weeks; complex situations with foreign business income, property, or prior-year unfiled returns may require 6–8 weeks or more.
Q: Can I use tax software like TurboTax for expat filing? Basic software handles the foreign earned income exclusion but misses nuance around PFIC rules, treaty considerations, and optimization strategies—hiring a professional is strongly recommended.
Start interviewing today to avoid penalties and claim deductions you'd otherwise miss.