The cadastral reference value and your tax bill
The cadastral reference value is a figure assigned to every property by the cadastre and used as the minimum taxable base for transfer tax and inheritance tax, so buying below it does not reduce the tax due.
gelisted editorial team · Updated 15 August 2026
The short version
- It has applied as the minimum taxable base since 1 January 2022.
- It is set from notarised sale prices in the same area, not from a visit.
- It can be checked online before you agree a price.
- It can be challenged, but the tax must normally be paid first.
A buyer who negotiates 30,000 € off the asking price and then pays tax on the original figure has met the reference value. It is the number that decides the tax base, not the one on the contract.
How it is set
The cadastre calculates it from the prices recorded in notarised sales in the same area, adjusted by the characteristics recorded for each property: surface area, age, use, condition coefficient and location. No one visits the property. It is updated annually and published, and it is deliberately set below the general market level through a reduction factor applied to the whole calculation.
| Tax | Effect | Note |
|---|---|---|
| Transfer tax on a resale | minimum taxable base | since 1 January 2022 |
| Inheritance and gift tax | minimum taxable base | |
| Wealth tax | one of the 3 comparison values | |
| IBI | not used | uses cadastral value |
| Capital gains on sale | not used | uses actual price |
| VAT on a new build | not used | uses the price |
| Challenge route | after paying | with a valuation report |
Why it matters before you offer
If a property is agreed at 350,000 € but carries a reference value of 400,000 €, transfer tax is calculated on 400,000 €. At an effective 9 % that is 36,000 € instead of 31,500 €, a difference of 4,500 € that appears after the price is agreed. Checking the figure during the negotiation lets you factor it in rather than absorb it.
Where to check it
The cadastre publishes it through its electronic office, and the certificate can be obtained with the cadastral reference of the property, which appears on the IBI receipt and on the deed. The seller can also request it. A lawyer will pull it as part of the standard checks, but only if instructed early enough for the answer to influence the price rather than explain the tax bill afterwards.
The value is published for the calendar year, so a purchase completing on 3 January can meet a different figure from one completing on 20 December.
Challenging it
It can be disputed where the recorded characteristics are wrong, for example a surface area that does not match reality, a use that was changed, or a condition that ignores that the property is uninhabitable. The usual route is to pay the tax as assessed and then request a rectification supported by an independent valuation, which costs 300 to 900 €. Only pursue it when the gap is large enough to justify the process.
Frequently asked
+What is the cadastral reference value?
A figure assigned by the cadastre that acts as the minimum taxable base for transfer tax and inheritance tax.
+Does it apply if I buy below it?
Yes. The tax is calculated on the reference value even when the agreed price is lower.
+How is it calculated?
From notarised sale prices in the area adjusted by the recorded characteristics of the property, with no site visit.
+Where can I check it?
Through the cadastre's electronic office, using the cadastral reference shown on the IBI receipt or the deed.
+Can it be challenged?
Yes, usually by paying first and then requesting rectification with an independent valuation costing 300 to 900 €.
Sources
- 1Boletín Oficial del Estado, BOE (August 2026)
- 2Govern de les Illes Balears, Govern de les Illes Balears (August 2026)