Andorra Signs Double Tax Treaties with Austria and Bulgaria (2026): What’s Signed, What’s Pending, and What It Means for HNWIs

Written and reviewed by the Axior Global Advisory Team — Andorra-based tax, corporate and residency advisors.

Andorra Signs Double Tax Treaties with Austria and Bulgaria (2026): What’s Signed, What’s Pending, and What It Means for HNWIs

TL;DR: Andorra has signed new double taxation agreements (CDIs) with Austria (Vienna, 29 May 2026) and Bulgaria (Varna, 19 June 2026). Both are signed but not yet in force — they still require ratification, exchange of instruments and publication in the BOPA. The Austria treaty was ratified by the Consell General on 14 July 2026 and now awaits Austria’s own procedures and the exchange of instruments; the Bulgaria treaty is a step behind. Andorra’s network of treaties already in force still stands at 22, with Estonia the most recent addition. None of this changes Andorra’s domestic rates: IRPF 0–10%, IS 10%, IGI 4.5%, and no wealth, inheritance, gift or exit tax.

Key Facts: Andorra’s New CDIs with Austria and Bulgaria (2026)

Item Austria Bulgaria
Treaty type Convention to avoid double taxation (CDI) Convention to avoid double taxation (CDI)
Signed 29 May 2026, Vienna 19 June 2026, Varna
Status Signed; ratified by the Consell General on 14 July 2026 — awaiting Austrian-side ratification and exchange of instruments Signed; pending ratification
In force? No — not until ratified & published in BOPA No — not until ratified & published in BOPA
Effect on Andorra’s active network (22) Would add once in force Would add once in force
Effect on Andorran tax rates None None

Andorra’s treaties already in force total 22, the most recent being the Andorra–Estonia CDI. Austria and Bulgaria are not yet counted in that figure.

What Just Happened?

Andorra has signed two new double taxation agreements in 2026 — one with Austria, signed in Vienna on 29 May 2026, and one with Bulgaria, signed in Varna on 19 June 2026. Both were announced by the Govern d’Andorra as part of Andorra’s continued effort to widen its treaty network across the European Union.

The important nuance is that signing is not the same as entering into force. A signed treaty is a completed negotiation; it becomes legally effective only after each country ratifies it through its own parliamentary process, the two states exchange instruments of ratification, and — on the Andorran side — the text is published in the Butlletí Oficial del Principat d’Andorra (BOPA). Until that cycle completes, neither the Austria nor the Bulgaria treaty has any operative effect. The Andorra–Austria CDI was ratified by the Consell General on 14 July 2026; entry into force now depends on Austria completing its own procedures and the exchange of instruments. The Andorra–Bulgaria CDI has been signed but has not yet completed ratification.

Is the Andorra–Austria Tax Treaty in Force?

No. The Andorra–Austria CDI has been signed (Vienna, 29 May 2026) but is not yet in force. It was ratified by the Andorran Consell General on 14 July 2026 — a necessary step, but not the final one. The treaty enters into force only once Austria completes its own procedures, the two states exchange instruments of ratification, and the relevant publication requirements are met.

For anyone with Austrian interests, the practical takeaway is to plan on the basis of the current rules and treat the treaty as an upcoming improvement rather than a present-day entitlement. Treaty benefits typically begin to apply from the start of the tax period following entry into force, so the calendar matters. The authoritative confirmation of status will come from the BOPA and the Portal Jurídic d’Andorra, which should be checked before relying on any specific treaty provision.

Is the Andorra–Bulgaria Tax Treaty in Force?

No. The Andorra–Bulgaria CDI was signed in Varna on 19 June 2026 but is not yet in force and, as of this writing, had not yet reached the Consell General’s plenary agenda for ratification. It is therefore a step behind the Austria treaty in the process.

This is an ordinary sequence: treaties are signed after negotiation and then move, sometimes months apart, through each country’s ratification machinery. The Bulgaria agreement signals Andorra’s intent to keep broadening its EU coverage, but it confers no benefits until it completes ratification and is published in the BOPA. We will update this article once its status changes.

Does This Change Andorra’s Domestic Tax Rates?

No. Double tax treaties allocate taxing rights between two countries; they do not alter Andorra’s internal rates. Those remain, according to the Andorran tax framework: personal income tax (IRPF) at 0–10% under Llei 5/2014 — the first EUR 24,000 effectively exempt, 5% from EUR 24,000 to EUR 40,000, and 10% above; corporate tax (IS) at a flat 10% under Llei 95/2010, with special regimes as low as 2%; and the general indirect tax (IGI/VAT) at 4.5% under Llei 11/2012.

Andorra also continues to levy no wealth, inheritance, gift or exit tax, and qualifying capital gains can reach 0% after a 10-year holding period. What the Austria and Bulgaria treaties will change — once in force — is how cross-border income between those countries and Andorra is taxed and relieved, not the domestic rates that make Andorra attractive in the first place.

How Many Double Tax Treaties Does Andorra Have?

Andorra’s network of treaties already in force stands at 22, the most recent being the Andorra–Estonia CDI. The Austria and Bulgaria agreements are signed but not yet in force, so they are not part of that count today; each would add to the network only once it completes ratification and is published in the BOPA.

Andorra built this network deliberately over the last decade, starting with its closest partners — France and Spain — and progressively adding agreements with countries such as Portugal, Luxembourg, the United Arab Emirates and, most recently, Estonia. For a fuller treatment of the network and how treaties work in practice, see our companion article on the Andorra–Estonia double tax treaty and the pillar guide, Andorra Law & Tax Changes in 2026. The official, current list of partner countries is maintained by the Govern d’Andorra and the tax administration.

What Is a Double Taxation Agreement, and Why Does It Matter?

A double taxation agreement (CDI) is a bilateral treaty that decides which of two countries may tax a given item of income, so the same income is not taxed twice. Modelled on the OECD Model Tax Convention, these treaties allocate taxing rights over dividends, interest, royalties, employment income, pensions, capital gains and business profits, and they set the mechanism — exemption or credit — that relieves double taxation where both states have a claim.

For a cross-border individual or company, the benefits are concrete: reduced or capped withholding taxes at source, clear “tie-breaker” rules to resolve dual-residency conflicts, a mutual agreement procedure to settle disputes, and exchange-of-information provisions aligned with international transparency standards. In short, a CDI converts cross-border tax uncertainty into a predictable, rules-based outcome — which is precisely why each new Andorran treaty is worth tracking even before it enters into force.

Why Do the Austria and Bulgaria Treaties Matter for HNWIs?

For high-net-worth individuals with interests in Austria or Bulgaria, these treaties — once in force — will remove a layer of friction and risk. Without a treaty, the same dividend, royalty or capital gain can be exposed to tax in both countries with limited relief; with a CDI in force, taxing rights are allocated and relief is guaranteed by treaty rather than left to domestic discretion.

Austria is a significant EU economy and financial centre, and a treaty gives Andorran residents with Austrian investments, businesses or property a clearer, more defensible framework for structuring cross-border income. Bulgaria, with one of the EU’s lowest flat corporate and personal tax rates, is relevant to entrepreneurs who combine Central and Eastern European business interests with an Andorran residence. In both cases, the broader signal matters too: each new agreement reinforces Andorra’s standing as a treaty-networked, OECD-aligned jurisdiction rather than an isolated low-tax enclave — a credibility factor that banks, counterparties and foreign tax authorities weigh heavily.

What Should You Do Now — Before the Treaties Are in Force?

Plan on the current rules, and prepare for the change rather than acting as though it has already happened. If you have income or assets connecting Andorra with Austria or Bulgaria, this is a good moment to map your position: confirm your treaty-residence status, identify where your dividends, interest, royalties and gains are currently taxed, and model how the position would shift once a treaty enters into force. Because treaty benefits generally apply from the start of the tax period after entry into force, the timing of distributions and transactions can be worth aligning with that calendar.

For those still planning a move to Andorra, the widening treaty network is one more reason to model an Andorran tax residence carefully rather than assume a generic low-tax result. The headline 0–10% rates are only part of the picture; the treaty layer determines how your foreign income actually flows through to you. A proper review pairs the domestic regime with the relevant CDI — and, for treaties not yet in force, with a realistic view of the ratification timeline — before any commitment is made. We will update this article as the Austria and Bulgaria treaties progress; the definitive status will always be what is published in the BOPA and the Portal Jurídic d’Andorra.

Frequently Asked Questions

1. Are the Andorra–Austria and Andorra–Bulgaria tax treaties in force?
No. Both are signed but not yet in force. Austria (signed 29 May 2026) was ratified by the Consell General on 14 July 2026 and awaits Austrian-side completion; Bulgaria (signed 19 June 2026) has not yet completed ratification. Neither has legal effect until ratified and published in the BOPA.

2. How many double tax treaties does Andorra currently have in force?
22, with Estonia the most recent to enter into force. Austria and Bulgaria are not yet counted in that figure.

3. When will the Austria treaty take effect?
It cannot be confirmed in advance. Following the Andorran ratification (14 July 2026), the treaty enters into force only once Austria completes its own procedures, the two states exchange instruments of ratification, and publication requirements are met. Benefits generally apply from the tax period after entry into force.

4. Do these treaties change my Andorran tax rate?
No. Andorra’s domestic rates are unchanged: IRPF 0–10%, IS 10% (special regimes from 2%), IGI 4.5%, and no wealth, inheritance, gift or exit tax. Treaties allocate taxing rights between countries; they do not change internal rates.

5. Who benefits most from the new treaties?
Individuals and businesses with income or investments spanning Andorra and Austria, or Andorra and Bulgaria — and, more broadly, anyone who values Andorra’s deepening, OECD-aligned treaty network as a marker of legal certainty.

6. Where can I confirm the official status?
In the BOPA (https://www.bopa.ad) and the Portal Jurídic d’Andorra (https://www.portaljuridic.ad), plus the treaty list maintained by the Govern d’Andorra and the tax administration. Treat press reports as indicative and the official publications as definitive.

Sources

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This article is for general information only and does not constitute legal or tax advice. At the time of writing, the Andorra–Austria and Andorra–Bulgaria treaties were signed but not in force. Treaty effects depend on entry into force and on your specific facts. Always confirm the current treaty status in the BOPA and Portal Jurídic d’Andorra and with a qualified advisor.

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