Cross-border tax consultancy · Aveiro · Lisbon · Porto

Innovative tax solutions for a secure future

Personalised tax strategy and business services for people whose income crosses borders. A dedicated consultant guides every step — clear, compliant, and genuinely stress-free.

  • Fully compliant — AT & Segurança Social
  • Bilingual · English & Portuguese

0%

Top IRS bracket we help you plan around

Progressive 13–48%, 2025

0%

Standard corporate tax (IRC)

16% for SMEs on first €50k

0 days

The line that decides tax residency

In any 12-month period

0

Offices across Portugal

Aveiro · Lisbon · Porto

Your Global Tax Partner

A dedicated consultant guides you through the entire process — regular updates, close personalised contact, and an efficient, transparent, stress-free experience.

Learn more about us

We specialise in tailored tax consultancy, particularly for clients with cross-border income. Whether you're an expat, entrepreneur, or international investor, we create compliant strategies that optimise your tax position and your financial outcomes.

We support individuals, entrepreneurs and businesses of all sizes — from tax consultancy and accounting to company formation and immigration support. Whether you're launching a venture, choosing the right tax regime, or relocating to Portugal, we simplify each step.

Why Frontier

Built for cross-border complexity.

International by default

Double-tax treaties, foreign income and cross-border structuring are our core, not an afterthought.

One dedicated consultant

The same specialist owns your case end to end — no call-centre roulette, no repeating yourself.

Compliant & discreet

Full compliance with the AT and Segurança Social, handled with confidentiality and technical accuracy.

Bilingual & efficient

Clear answers in English and Portuguese, fast turnarounds, and no jargon between you and a decision.

How we work

One consultant. The whole journey.

No call-centre roulette. From first hello to ongoing partnership, the same specialist owns your case.

  1. 01

    Discovery

    We map your situation — residency, income sources, goals — and assign a dedicated consultant who owns your case end to end.

  2. 02

    Strategy

    We design a compliant plan: the right regime, structure and timing to optimise your position across every jurisdiction involved.

  3. 03

    Execution

    Filings, registrations, incorporations or applications — prepared, submitted and tracked with precision and full transparency.

  4. 04

    Ongoing partnership

    Regular updates and proactive advice as rules and your life change. We stay close, so nothing catches you off guard.

Who we serve

Not sure? Ask us
  • Expats & remote workers
  • Entrepreneurs & founders
  • Freelancers & independents
  • Property investors
  • Retirees relocating
  • International businesses
  • Cross-border families
  • Returning citizens

Common questions

Answers, before you even ask.

Can't find yours? A consultant will walk you through your own situation.

Ask us directly
Can you register a new company for us?

Yes, we handle the entire company formation process, ensuring legal compliance and tax efficiency.

Do you offer accounting for small businesses?

Yes, we offer tailored accounting and bookkeeping services for small businesses and freelancers.

Can you help me file my IRS return?

Yes, we assist with tax returns for employees, freelancers, and investors, ensuring accuracy and compliance.

Do you support landlords and local accommodation?

Yes, we support landlords with taxation, compliance, and structuring — whether for long-term rentals or local accommodation.

I'm moving to Portugal. Can you help with the setup?

Yes, we guide you through the visa process and help with NIF, bank accounts, and essential documentation.

Can you manage tax for freelancers?

Absolutely. We provide full tax support for freelancers, including activity registration, VAT handling, and quarterly IRS filings.

Do you handle VAT registration and filings?

Absolutely. We handle the entire VAT process — from registration to periodic filings — ensuring full compliance with Portuguese and EU regulations.

Can you help a foreign business relocate to Portugal?

Yes, we offer strategic consulting and operational support to international companies looking to establish or expand their presence in Portugal.

See all FAQs