Securing Your Position Before AEAT Escalates
When the Spanish tax authority, AEAT, starts asking questions, the way you respond in the first weeks can shape the whole dispute. Once an enquiry letter, an inspection notice, or a data-matching query arrives, you are already on the AEAT radar, and their internal timetable has started to run. Waiting to see what happens next usually makes things harder, not easier.
For people and businesses with UK links, early, strategic engagement with specialist Anglo-Spanish counsel gives you time to check the facts, line up your evidence, and decide what to say, and just as important, what not to say yet. This is especially true around late summer and the run-up to year-end, when AEAT tends to push harder on collections and settlements.
Cross-border experience matters where there is Spanish tax exposure tied to:
- Spanish property, including second homes or holiday lets
- Succession structures, like holding companies or trusts touching Spanish assets
- Business interests split between the UK and Spain
At that point, a key question arises: do you lead with London-based counsel or Spain-based counsel? That choice affects how far English legal privilege can protect your planning, how much procedural control you have inside Spain, and how you manage evidence that sits in more than one country.
Common Cross-Border AEAT Scenarios
AEAT disputes with an international flavour tend to follow a few patterns that we see time and again. Typical situations include:
- UK residents owning Spanish property, either personally or through structures
- People moving into or out of Spain around a tax year and later facing residency challenges
- Non-resident landlords receiving Spanish rental income
- Expatriates with income, pensions, or investments spread between the UK and Spain
- Cross-border inheritances, where Spanish assets pass to heirs in several jurisdictions
AEAT may act through:
- Data-matching letters, for example comparing land registry, utility, and banking data
- Residency disputes, arguing that an individual was tax resident in Spain for a period
- Non-resident income tax assessments for property or other Spanish-source income
- Wealth, gift, and inheritance tax checks involving Spanish assets or beneficiaries
- Re-characterisation of holding companies, trusts, or similar structures
Timing also has a rhythm. After Spanish filing periods in spring and summer, AEAT tends to follow up with questions and checks. Later in the year, collection and enforcement activity often intensifies. For many UK-resident clients, August becomes a key moment to secure coordinated advice from Spanish tax lawyers in London alongside colleagues on the ground in Spain.
Legal Privilege in the UK and Spain
One of the biggest strategic questions is where you base the core of your advice. A major reason is the difference between English legal professional privilege and Spanish rules on professional secrecy.
Under English law, communications with a barrister or lawyer in relation to actual or anticipated contentious matters are generally protected by legal professional privilege. In practice, this means:
- You can share full details with your London-based legal team
- Draft analyses, internal memos, and strategy discussions are not usually disclosable
- You can stress-test different options before deciding what to place in front of AEAT
In Spain, professionals are bound by secrecy obligations, but the protection does not always work in the same way as English privilege. In tax matters, AEAT may be able to seek access to certain documents. If you have shared early-stage drafts or exploratory opinions too widely or too informally inside Spain, you may find that material harder to keep out of the file.
This is where Spanish tax lawyers based in London can be so useful. They can:
- Centralise sensitive strategy and documentation under English privilege
- Coordinate with UK advisers, such as accountants or family offices, within that framework
- Shape what is eventually passed to Spain-based colleagues for formal submission to AEAT
The result is a clearer line between your internal strategic thinking and the final versions that cross the AEAT desk.
When to Lead with London-Based Counsel
There are clear situations where starting with London-based representation is usually preferable. For example:
- Complex residence disputes, where UK and Spanish rules clash or overlap
- Multi-jurisdictional inheritances, with AEAT examining how estates or lifetime gifts were structured
- Investigations involving UK companies, partnerships, trusts, bank accounts, or professional advisers
For UK-resident clients, working first with Spanish tax lawyers in London often feels more practical. You are in the same time zone, you can meet in person for longer conferences, and you can review documents together without the pressure of immediate Spanish procedural deadlines.
Some of the main advantages are:
- Cultural and linguistic alignment with your UK advisers
- Easier access for trustees, family offices, and corporate officers who are UK-based
- The ability to map out how AEAT's actions might interact with UK tax and reporting
Evidence handling is another big factor. Often, it is safer for detailed analyses, valuations, and expert opinions to be produced and reviewed in London first, within an English privilege structure. From there, your team can decide:
- Which documents should be disclosed to AEAT
- How to present them so they are clear under Spanish law
- Which points are better kept as internal working material
Spain-based colleagues can then submit a carefully curated set of evidence and arguments, rather than an unfiltered bundle that may raise avoidable questions.
When Spain-Based Representation Becomes Indispensable
At certain stages, you need people on the ground in Spain. Spanish procedural law, filing systems, and local AEAT practice require direct involvement from Spain-based lawyers or barristers. This is especially true for:
- Responding to formal notifications and allegations
- Filing administrative appeals and economic-administrative claims
- Conducting litigation before Spanish courts
Local practitioners bring tactical advantages:
- Day-to-day experience with AEAT officials and their working habits
- Knowledge of regional differences and local tax offices
- Familiarity with strict Spanish deadlines and electronic filing systems
- Ability to attend inspections, interviews, and hearings in person
The most effective approach is usually shared responsibilities between London and Spain. In broad terms:
- Strategy, cross-border modelling, and privilege-sensitive work sit primarily in London
- Procedural execution, formal submissions, and advocacy take place in Spain
Handled carefully, this allows you to keep high-risk analysis protected in London, while still meeting every Spanish formality and deadline through Spain-based counsel.
Managing Cross-Border Evidence and AEAT Expectations
In cross-border cases, AEAT will typically ask for a wide range of documents. Depending on the issue, they may request:
- Bank statements and investment records
- Utility bills, rental agreements, and travel records, to test residence and presence in Spain
- Company accounts, share registers, and board minutes
- Trust deeds, letters of wishes, and trustee resolutions
- Gift and inheritance records
- Property purchase contracts, notarial deeds, and land registry extracts
Providing these materials without a plan can be risky. Differences between UK and Spanish concepts of residence, domicile, and beneficial ownership mean that a document that looks harmless in one system may raise questions in the other. For instance, trust paperwork that is normal in a UK setting may be interpreted very differently by AEAT.
A coordinated Anglo-Spanish team can help to:
- Identify which documents are actually required under Spanish law
- Group evidence in a way that supports your position rather than confusing it
- Prepare clear explanations where UK structures do not match Spanish expectations
Usually, the process works best when:
- Sensitive documents are first gathered and reviewed in London
- Translations and certifications are planned so they match Spanish procedural needs
- Only consistent, well-explained sets of documents are filed in Spain
If there are any parallel enquiries by UK authorities, the same team can check that facts and timelines line up across both countries, so you are not saying different things to different tax offices. For clients with lives, families, and businesses spread between the UK and Spain, that kind of joined-up approach can make the difference between a managed dispute and a spiralling one.
At Del Canto Chambers, we work as one Anglo-Spanish team, with Spanish tax lawyers in London and colleagues in Spain who understand both systems and how they interact.
Secure Clarity On Your Spanish Tax Position Today
If you are dealing with Spanish tax issues from the UK, our specialist Spanish tax lawyers in London at Del Canto Chambers can provide the clarity and strategy you need. We will review your situation, explain your options in plain English and guide you through each step. To arrange a confidential consultation, simply contact us and we will respond promptly.
