A tax lawyer (in Spanish, abogado fiscal or abogado tributario) is the legal professional specialising in taxes who advises you so that you pay what the law requires and defends you when there is a dispute with the Spanish Tax Agency (Agencia Tributaria): an inspection, an assessment, a penalty or, in serious cases, criminal proceedings. Unlike a gestoría (administrative agent), they do not just file returns: they interpret the rules, plan and can represent you in appeals and before the courts.

What a tax lawyer does, specifically

Their work moves between prevention and defence. The most common jobs are:

  • Tax planning: studying, before you act, how a sale, an inheritance, a gift, an investment or the move from self-employed to a company will be taxed, and choosing the most efficient legal option.
  • Requests for information and checks: replying to letters from the Tax Agency or the regional tax authority, which usually give short deadlines (often 10 working days).
  • Inspections: accompanying the taxpayer or the company during the procedure, providing the documentation and disputing the inspection reports (actas).
  • Appeals: the appeal for reconsideration (recurso de reposición) to the body that issued the decision, or the economic-administrative claim (reclamación económico-administrativa) before the economic-administrative tribunal; in both cases, in general, within one month of notification. Once the administrative route is exhausted, the judicial review appeal (recurso contencioso-administrativo) before the courts.
  • Penalties: checking whether the infringement exists, whether the penalty is correctly calculated and whether any reduction applies.
  • International taxation: tax residence, double taxation treaties, non-residents and special regimes such as the Beckham Law (we explain who can apply) or the sale of a property by a non-resident.
  • Criminal defence in offences against the Public Treasury, normally alongside a criminal lawyer.

Tax lawyer, tax adviser or gestoría: which do you need?

All three work with taxes, but they do not do the same thing:

  • The gestoría handles the paperwork: it files returns and deals with the quarterly filings and the day-to-day formalities.
  • The tax adviser analyses and plans: they review your situation, apply deductions and tell you how to organise yourself. They do not need to be a lawyer.
  • The tax lawyer does all of the above and can also defend you in litigation and before the courts, because they are registered with the bar as a lawyer.

In practice, many firms combine all three profiles. The useful rule is this: to comply and file, a good tax adviser or a gestoría is enough; when there is a dispute with the Tax Agency, a lot of money at stake or a risk of a penalty, a lawyer is the better choice.

How much does a tax lawyer charge?

There is no official tariff: in Spain lawyers are free to set their fees and the bar associations cannot fix price scales. Each professional works out their own according to the work, the complexity and what is at stake. The most common formulas are:

  • Fixed price per job: replying to a request for information, preparing an appeal or planning a specific transaction.
  • Hourly rate, common in ongoing advice or in matters that are hard to predict.
  • Monthly fee or retainer (iguala), when the firm handles the tax affairs of a business or of a person’s assets on a recurring basis.
  • A fixed part plus a variable part depending on the outcome, in some appeals and refund claims.

Before starting, always ask for a written quote or engagement letter (hoja de encargo) that says what it includes (for example, whether it covers only the administrative appeal or also a possible court case), what separate expenses there may be and how it is paid. Be wary of fixed figures given without having seen the documentation.

The difference between “derecho fiscal” and “derecho tributario”

In everyday Spanish they are synonyms, and “abogado fiscal” and “abogado tributario” refer to the same professional. Strictly speaking, derecho tributario (tax law) is the part of the law that regulates public levies (taxes, fees and special contributions): who pays, how much, how it is declared and how it is appealed. The term fiscal is broader and refers to everything related to the public treasury, including public finance law, which also covers public spending and the budget. For the taxpayer, the difference has no practical consequences.

The most common tax offences

Most problems with the Tax Agency are administrative infringements: they are resolved with an assessment, interest and, where applicable, a financial penalty. Only the most serious cases are criminal offences. The most common ones in the Spanish Criminal Code are:

  • Offence against the Public Treasury (art. 305): defrauding more than €120,000 per tax and year, whether by failing to pay, obtaining undue refunds or enjoying tax benefits you are not entitled to. It is punished with one to five years in prison and a fine of up to six times the amount defrauded, with heavier sentences in aggravated cases.
  • Social Security fraud (art. 307): evading the payment of contributions of more than €50,000 over four calendar years.
  • Fraud involving subsidies and public aid (art. 308): obtaining them by falsifying the conditions or diverting them from their purpose, above €100,000.
  • Accounting offence (art. 310): not keeping the compulsory accounts, keeping different sets of accounts or making fictitious entries.

Regularising your situation voluntarily, before the Tax Agency starts proceedings, can avoid criminal liability. It is one of the moments when having a lawyer matters most.

When it is worth calling a tax lawyer

  • If you receive a proposed assessment, a penalty or notice that an inspection is starting.
  • Before a big transaction: selling property, inheriting or giving away assets, changing residence or reorganising a business.
  • If you think you overpaid and want to claim a refund, for example of municipal capital gains tax (plusvalía municipal) or of a self-assessment that was done wrongly. In general, the right to claim it lapses after four years.
  • If you have income or assets in several countries.

If you are in any of these situations, you can tell us about your tax enquiry and we’ll put you in touch with a lawyer or tax adviser who specialises in that type of matter.

Frequently asked questions

Do I have to use a lawyer to appeal against the Spanish Tax Agency?

Not in the administrative route: you can file the appeal for reconsideration or the economic-administrative claim yourself. In the administrative courts (contencioso-administrativo), in general, you do need a lawyer, with some exceptions.

How long do I have to appeal against a tax assessment in Spain?

In general, one month from the day after notification, both for the appeal for reconsideration and for the economic-administrative claim. Look at the foot of the letter: it states the appeal and the deadline.

How many years back can the Tax Agency review my taxes?

As a general rule, four years from the end of the period for filing the return. There are events that interrupt that period, such as a request for information or an inspection.

Can a tax lawyer help me with my income tax return?

Yes, although for an ordinary return a tax adviser or a gestoría is usually enough. The lawyer adds more when there are property sales, income from abroad or a dispute with the Tax Agency.