Tax advisor in Spain: how to choose the right one for your property

Asesor fiscal vs gestor vs abogado

In Spain, anyone can call themselves an asesor fiscal. The label describes a service, not a qualification. What protects you is the professional behind it.

Many firms combine all three. Economists (economistas) and graduates in business can also give tax advice and belong to their own colleges, and there are professional associations of tax advisers. Membership of a college or association means rules, complaints procedures and usually compulsory insurance. See our guide to gestors in Spain.

What a Spanish tax advisor does for property owners

Non-residents: Modelo 210

If you own a Spanish home and live elsewhere, you file Modelo 210 every year, even if you never let it. A share of the valor catastral is treated as income and taxed at 19% (EU/EEA residents) or 24% (others, including the UK and US). The return for each year is due by 31 December of the next year. Each owner files separately. If you let the property, returns are quarterly instead, due in the 20 days after each quarter. A good advisor knows when EU/EEA residents can deduct expenses and when they cannot. See non-resident tax in Spain.

Residents: the annual return

Once you are tax resident in Spain, you file the annual income tax return (Modelo 100) on your worldwide income. The campaign runs from early April to 30 June. You may also need Modelo 720 if your assets abroad exceed €50,000 in any of the three categories (accounts, securities, property), and a wealth tax return in some regions. Here the advisor must understand the treaty with your old country: for UK pensions, rental income and ISAs, see the UK–Spain double tax treaty.

Planning a sale

This is where good advice pays for itself. Before you sell, an advisor should:

• work out your acquisition cost, including purchase taxes, fees and improvements you can prove;
• check your residence status, which decides between the 19% flat rate and the resident scale, and the reliefs you can use;
• explain the buyer's 3% retention and file Modelo 210 to pay the balance or claim a refund;
• estimate the plusvalía and IBI the buyer may ask you to settle at completion.

See capital gains tax in Spain and selling property in Spain. For a quick estimate first, try our Spain tax calculator.

Inheritance

Inheritance tax in Spain is due within six months of the death, and the right regional relief can reduce it almost to nothing, or not. This is usually work for a lawyer or a firm with inheritance experience. See inheritance tax in Spain.

Typical fee structures

There is no official price list. These are typical market figures in 2026, and they vary with the region, the firm and your case:

Fees are usually quoted before 21% IVA. Ask whether the price includes it.

A fixed yearly fee suits routine filings. For a sale or a move to Spain, a one-off quote based on the work involved is fairer than a percentage of the price, which can become expensive on a high-value property. Ask what happens if the tax agency later queries a return: some firms include replies to simple letters, others bill them by the hour.

How to get good tax advice in Spain

Questions worth asking before you hire anyone:

1. What is your professional college or association, and your membership number?
2. Do you have professional indemnity insurance?
3. How many non-resident property owners do you file for?
4. Who will actually prepare and submit my returns?
5. Will I receive a copy of each return and the filing receipt?
6. What happens if the tax agency sends a query about a return you filed?

Red flags

• No written engagement letter or fee quote.
• They want to file using your digital certificate or login but won't give you copies of what was filed.
• They tell you non-residents don't need to file if the property isn't let. They do.
• They suggest declaring a lower price in the deed. Under-declaring is tax fraud, and the valor de referencia makes it pointless.
• Payment in cash with no invoice.
• Promises of "zero tax" without explaining which relief applies and why you qualify.
• They can't explain the difference between 19% and 24% for non-residents, or when the treaty applies.

Before you pay for advice

Have your documents ready: the purchase escritura, your NIE, the IBI receipt with the valor catastral, and details of every owner. If you're not sure the property records are right, enter the address or referencia catastral on our free property check and we'll get back to you by email.