Spain's valor de referencia: what it is and what it costs you

What the reference value is and where it comes from

The valor de referencia is a euro figure that Spain's Dirección General del Catastro calculates for every property, every year, without anyone asking for it and without notifying the owner.

The third final provision of the Cadastral Property Act sets out the whole chain. The Catastro receives the prices of every property sale signed before a notary. From them it produces an annual property market report and a value map that divides Spain into homogeneous valuation areas, assigning each area average value modules for its representative property types. An annual resolution then sets the precise elements for applying those modules to each individual property according to its cadastral characteristics.

The Act adds an express ceiling: the reference value may not exceed market value. To guarantee that, a ministerial order fixes a reduction factor. The one in force is Orden HFP/1104/2021, which sets it at 0.9 for both urban and rural property. In other words, the system deliberately aims at 90 % of the average market value of the property type, not 100 %.

The 2026 values come from two Catastro resolutions dated 27 October 2025, one for urban property and one for rural property without buildings, announced in the BOE of 16 December 2025 and available from 1 January 2026.

How it differs from the valor catastral

This is the most widespread confusion, and the law resolves it in a way that surprises people: art. 3.1 of the Cadastral Property Act lists the characteristics of a property's cadastral description and names the reference value and the cadastral value as two separate characteristics. They are not two names for one thing. Your property has both, and they are usually far apart.

The cadastral value's market-reference coefficient of 0.5 comes from the Order of 14 October 1998 and applies to the individual value produced by the valuation report. The reference value's 0.9 reduction factor comes from the 2021 order. The nuance matters, because 0.5 is not the effective factor: section Segundo.2 of that Order builds a 1.40 coefficient for promotion costs and profits into the individualised value only for built properties, so on the corrected base a home's cadastral value comes out at 0.70 and a bare plot's at 0.50. The full chain is in what the cadastral value is. And on top of that the cadastral value rests on a valuation report that may be twenty years old. That is the whole distance between the two figures.

If you want the other half of the story, we cover it in detail in what the Spanish cadastral value is. And to look up either figure you first need the property's cadastral reference.

Which taxes use the reference value

Since the Ley 11/2021 reform the reference value has been the tax base of two taxes, and only two:

• ITP and AJD, when you buy a resale property. Art. 10.2 of its consolidated act says the value of the property shall be the reference value at the date the tax accrues. Our Spanish transfer tax calculator already works to that rule and to each region's rate.
• Inheritance and gift tax, when you inherit or receive a gift. Art. 9.3 of Ley 29/1987 uses exactly the same formula, and so does our Spanish inheritance tax calculator.

There is a third effect almost nobody mentions, and it works in your favour. Art. 36 of the Income Tax Act provides that, in acquisitions by gift or inheritance, the acquisition value is the one produced by the inheritance and gift tax rules, capped at market value. Since that value is the reference value, a high reference value makes the inheritance more expensive today while also raising your acquisition value, which reduces the capital gain on the day you sell the inherited property. The same number cuts both ways.

For Wealth Tax, art. 10.One of Ley 19/1991 counts property at the highest of three values: the cadastral value, the value determined or verified by the authorities for the purposes of other taxes, and the price or acquisition value. Ley 11/2021 added the words "determined or" there. The article does not say whether the reference value of a property that has never been transferred is one of those three figures, so on that point it is worth consulting an adviser rather than assuming an answer.

Where it does not reach: the IBI, whose tax base is the cadastral value under art. 65 of the Local Finances Act, and municipal capital gains tax, which is calculated on the cadastral value of the land. Neither the IBI bill nor municipal capital gains tax changes because the reference value changes.

The one-way rule that sets your tax base

Both articles, art. 10.2 for ITP and art. 9.3 for inheritance tax, work in a single direction, and that asymmetry is the only thing you need to remember:

• If the price or declared value is lower than the reference value, the tax base is the reference value. You will pay tax on a value higher than what you paid for the home.
• If the price or declared value is higher, the tax base is the highest of those figures. The reference value gives you nothing back.

There is one nuance worth keeping straight between the two taxes. For ITP the comparison runs against three figures: the declared value, the agreed price or consideration, or both. For inheritance and gift tax, where there is no price, the comparison is against the value declared by the parties alone.

A worked example with real numbers

You buy a flat in Andalusia for 200,000 euros. The Catastro's 2026 reference value for it is 230,000 euros. Andalusia's general ITP rate is 7 % (art. 41 of Ley 5/2021).

• Tax base: 230,000 euros, because the price paid is lower than the reference value.
• ITP: 7 % of 230,000 = 16,100 euros.
• Had the base been the price: 7 % of 200,000 = 14,000 euros.

The difference is 2,100 euros of tax on a transaction in which you did not pay a single euro more. And the arithmetic flips if you buy for 250,000 euros: the base is then 250,000 rather than 230,000, and the tax rises to 17,500 euros.

That is exactly the calculation our Spanish transfer tax calculator performs, and it also tells you which figure set the base.

What happens if your property has no reference value

Not every property has one. The Catastro's annual resolutions cover urban property and rural property without buildings, and the BOE notices themselves say so with an express condition: the reference value is the tax base "provided they have a reference value". A rural plot with a building on it, for instance, is normally outside the scope.

For that case, art. 10.2 for ITP and art. 9.3 for inheritance tax share the same third paragraph. Where no reference value exists, or the Catastro cannot certify it, the tax base is the highest of the declared value, the agreed price or market value, subject to review by the tax authority. In practice you return to the pre-2022 regime.

How to look up the reference value

You look it up on the Catastro's Sede Electrónica, under the service "Consulta de valor de referencia", which lets you choose any year from 2022 to 2026. Access requires an electronic certificate, an electronic ID card or Cl@ve.

There are two alternatives to the online route:

1. The Gerencias del Catastro, by appointment through the Catastro's direct line, per the BOE notice of December 2025.
2. A certificate of the reference value, which is the document to produce if you need to evidence it to the tax authority.

The Act makes clear that these values are not personal data and can be consulted permanently. The current year's values are available from 1 January.

Look it up before you sign, not after. The value that counts is the one in force at the date the tax accrues, and knowing it in advance is what lets you budget the purchase tax without surprises.

How to challenge it when it works against you

There is a procedural trap here, and it costs money. The Catastro's annual resolution can be appealed within one month of publication, but that is no use to a buyer. The Constitutional Court says so bluntly in judgment 13/2026: someone about to acquire a property lacks not only a legitimate interest but also standing to challenge that resolution.

The route that works is the one in art. 10.3 for ITP and art. 9.4 for inheritance tax, and there are only two doors:

1. Request a correction to the self-assessment you already filed, challenging the reference value in it.
2. Appeal the assessment the tax authority issues you.

In both cases the authority does not decide alone. It resolves only after a report from the Dirección General del Catastro, which the law makes mandatory and binding when the challenge arrives via the correction request or a reposición appeal, and mandatory when it arrives via an economic-administrative claim. That report must justify the value it confirms or corrects by citing the resolution it derives from, the average value modules and the reduction factors applied.

It is also worth knowing what is not available: the taxpayer's counter-valuation (tasación pericial contradictoria). Because the tax base is a value fixed by statute rather than a valuation check, that instrument does not exist in this regime.

The Constitutional Court has now ruled

For four years, any text about the reference value ended by saying the system was awaiting a court ruling. Not any more.

The full Constitutional Court, in judgment 13/2026 of 12 February 2026 (published in the BOE of 19 March), dismissed the constitutional challenge that the High Court of Justice of Andalusia had brought against art. 10 of the ITP act and the third final provision of the Cadastral Property Act, on the ground of a possible breach of the ability-to-pay principle in art. 31.1 of the Constitution. The system is constitutional.

Three things in the reasoning affect you as a taxpayer:

• The reference value operates as a presumption that can be rebutted by evidence. The burden of showing it does not match the market is yours, and the Court considers that acceptable because this is not a penalty regime.
• The Court lists four administrative stages at which the value can be corrected without going to court: the request to correct the self-assessment, the submissions stage on the proposed assessment, the reposición appeal and the economic-administrative claim.
• If the previous owner failed to report a change to the property and it is therefore overvalued, the buyer does not have to carry that error: the Court expressly affirms their right to adjust the valuation to the property's actual characteristics.