International Tax Lawyers

Business activity rarely stops at a border. A Spanish company can provide services outside the country, a foreign company can invest in Spain, a group can finance its subsidiaries, a nonresident partner can receive dividends, an asset structure can operate across multiple jurisdictions, or a single source of income may be subject to different tax rules.

International taxation comes into play precisely at this point: when a transaction, investment, income, company, or structure involves more than one country and requires the coordination of Spanish regulations, foreign regulations, treaties, withholding taxes, documentation, and the criteria of the tax authorities involved.

IN DIEM Abogados provides international tax advisory services to companies, corporate groups, investors, foreign entities, complex estates, and cross-border structures that need to organize their tax positions from a legal, documentary, and strategic perspective.

International Tax Advisory Services for Companies, Corporate Groups, and Investors

International taxation is not merely a matter of identifying where a tax is paid. In many cases, the real issue lies in how the transaction is structured, which country has the right to tax the income, which tax treaty applies, what withholding tax is applicable, where the entity is tax-resident, whether there is a business presence in Spain, and whether the intra-group transactions are properly documented.

The Tax Agency provides a specific section on regulations and interpretive guidelines regarding international taxation on its website.

Advice must be based on the client’s economic and legal circumstances. A Spanish company that bills foreign clients for services is not the same as a parent company that finances its subsidiary, a foreign company operating in Spain, a nonresident investor acquiring equity interests, or a group reviewing prior fiscal years.

In all of these scenarios, tax coordination among countries can make the difference between an orderly structure and a situation that is vulnerable to adjustments, undue withholdings, double taxation, or documentation disputes.

When Does a Company Need International Tax Advice?

A company, group, or investor typically needs international tax advice when a transaction extends beyond the purely domestic sphere. The connection may lie in the parties’ residence, the place where income is generated, the country from which the investment is made, the existence of subsidiaries, international payments, or multi-tiered corporate structures.

Operations, income, and investments related to various countries

International tax issues may arise in connection with dividend payments, interest, royalties, services, capital gains, financing, corporate acquisitions, profit distributions, foreign investment, intragroup payments, or divestitures.

When the same income is linked to two jurisdictions, the international double taxation must be analyzed separately. In such cases, it is necessary to review the nature of the income, the recipient’s residence, the source country, withholding taxes, the applicable treaty, and the available documentation.

The treaties signed by Spain may be relevant in transactions with an international dimension, and they can be officially accessed through the Tax Agency and the Ministry of Finance.

Cross-Border Companies, Groups, and Structures

In international corporate structures, tax residency, effective management, business presence, related-party transactions, and documentation are key elements.

If the problem lies in determining where an entity or structure is resident for tax purposes, the international tax residency becomes the starting point. In other cases, the focus may be on the actual business activity carried out in Spain by a foreign entity.

When a foreign company operates on a continuous basis in Spain, the permanent establishment in Spain may affect the entire tax treatment. The presence of personnel, agents, facilities, contracts, or recurring activity must be reviewed in detail before assuming that the company does not have its own tax presence.

Documentation, Agreements, and International Tax Risks

Documentation is an essential component of international taxation. Tax residence certificates, contracts, invoices, intra-group agreements, transfer pricing reports, tax returns, withholding tax statements, corporate organizational charts, and investment documentation may be necessary to support a tax position.

The General Tax Law establishes the general framework for tax obligations and tax enforcement procedures in Spain.

An international position that is poorly documented can be difficult to defend, even when the structure was based on sound economic logic. That is why a proactive and well-documented approach is particularly important.

IN DIEM’s International Tax Services

International tax advice should provide a clear overview of the main risks, without treating each issue in isolation. Each transaction may involve several issues at once: residency, withholding taxes, double taxation, presence in Spain, related-party transactions, foreign investment, or reviews of prior tax years.

International Double Taxation

Double taxation occurs when income, an investment, a transaction, or a gain is subject to taxation in more than one country. It can affect dividends, interest, royalties, services, capital gains, corporate profits, or cross-border payments.

When there is a risk of double taxation, it is advisable to review international double taxation through a separate analysis of income, jurisdictions, tax treaties, withholding taxes, and documentation.

International Tax Residency

Tax residency can influence the entire structure. When it comes to corporations, executives, partners, investors, or international estates, it is not always sufficient to consider only the formal address. Effective management, center of interests, administration, documentation, and economic ties may all be relevant.

When the dispute involves the tax residence of a corporation, entity, or taxpayer with a complex business or asset structure, the international tax residency.