Cadastral Value vs Market Value: How It Shapes Your Spanish Property Taxes
When you buy in Spain, two very different numbers attach to your home: the price you paid and the valor catastral set by the council. Confusing the two can mean miscalculating IBI, transfer tax or the eventual capital-gains bill.
Who is behind this page. Sókerim is a Spanish real-estate agency (Lyrio Home Solutions, S.L.) with offices in the Madrid region and Alicante and a network of about 1,000 collaborating agencies across Spain. We help people who live abroad find, buy and manage property in Spain, in English, from the first search to the keys.
Two Numbers, Two Very Different Jobs
Every property in Spain carries an administrative figure called the valor catastral, fixed by the Land Registry's cadastre and the local council. It has nothing to do with what you negotiated with the seller; it is a technical valuation used purely for tax purposes, and it usually sits below what buyers from the United Kingdom actually pay for a comparable home.
Because this figure feeds into several separate taxes — the annual property tax, transfer tax on resale homes, and the municipal charge due when you eventually sell — understanding where the cadastral value comes from, and how it differs from the market price, helps you budget correctly from the outset and avoid surprises years later.
The valor catastral is not negotiable and is not the price you paid: it is set by the administration, reviewed only occasionally, and used as the basis for several Spanish property taxes, not as proof of what your home is worth today.
Where the Cadastral Value Comes From
The valor catastral is worked out by the local council and the national cadastre from factors such as location, surface area, age and use of the property. It has no relationship to what buyer and seller actually agree in a sale, and it is published on every IBI receipt long before any purchase takes place.
Because councils only review these values periodically rather than every year, the cadastral figure can lag well behind the real market for years at a time, especially in areas where prices have moved quickly. Buyers from the United Kingdom are often surprised to see a cadastral value that looks low compared with the price in the sale contract.
Why It Matters Before You Even Complete
For resale homes, the regional transfer tax (ITP) is calculated on the higher of the agreed price or the tax authority's own reference value, a figure built partly from cadastral and sales data across the area. A low agreed price in the deed will not necessarily reduce your tax bill below that reference.
New-build purchases work differently: instead of ITP, you pay VAT at 10% plus stamp duty, so the cadastral value plays less of a role at the point of purchase itself. It still matters immediately afterwards, because it becomes the basis for your annual property tax and, later, your capital-gains calculation.
IBI
Annual property tax
Your yearly council tax bill, due every year you own the home, is calculated directly on the cadastral value, not on what you paid — so a higher cadastral figure means a higher IBI bill regardless of the purchase price agreed.
ITP
Transfer tax on resale homes
When you buy an existing property, the regional transfer tax is worked out against the higher of the agreed price or the tax authority's reference value, built partly from cadastral data — a bargain price does not automatically mean a lower tax bill.
Modelo 210
Non-resident income tax
Even when the property is not rented out, non-resident owners declare a notional income linked to the cadastral value each year in their Modelo 210 return, alongside any real rental income once the home is let.
At the Point of Sale
When you eventually sell, the town hall charges plusvalía municipal, a tax based on the increase in the cadastral value of the land over your period of ownership — owed regardless of whether you made a profit in market terms on the sale as a whole.
Separately, because you are a non-resident seller, the buyer withholds 3% of the agreed sale price and pays it to the Spanish tax agency on account of your capital-gains tax. You later settle any difference once the real gain is calculated from the purchase and sale deeds, ideally with help from a lawyer or gestoría, and the double taxation agreement between Spain and the United Kingdom determines how that same gain must also be reported to HMRC.
| Tax or cost | Based on | When it applies |
|---|---|---|
| IBI (council tax) | Cadastral value | Every year you own the home |
| ITP (transfer tax) | Price or reference value | At purchase, resale homes |
| Plusvalía municipal | Cadastral land value | At sale |
| Non-resident withholding | Sale price (3 %) | At sale, non-resident sellers |
Practical Steps for a Buyer from the United Kingdom
- Ask the agent or seller for the property's current valor catastral before making an offer, not after signing.
- Check the latest IBI receipt, which states the cadastral value clearly and shows how it has moved over recent years.
- Budget for ITP, or for VAT and stamp duty on a new build, using both the agreed price and the possibility of a higher reference value.
- Keep your P60s, payslips, last filed Self Assessment and a few months of bank statements ready, since Spanish banks and your lawyer typically ask for these when verifying funds.
- Before selling, speak with a tax adviser in Spain about plusvalía, the 3 % withholding, and how the gain must be reported to HMRC under the double taxation agreement.
If you live in the United Kingdom
Spain is a relatively short flight away from most UK airports, making regular visits to a Spanish property straightforward for owners based in Britain. Many British buyers are drawn to Spain for its climate, coastal lifestyle and established expatriate communities. One practical point to bear in mind is that Spanish inheritance law differs from UK rules, so it is worth taking specific advice on how it may affect the property and one's estate. Currency movements between sterling and the euro can also affect the overall cost of purchase and ongoing expenses.
What a Spanish bank will usually ask you for
- Proof of income: recent P60 and payslips
- Last filed UK tax return (Self Assessment)
- Bank statements from the last three to six months
- Evidence of existing loans or mortgage commitments
- Valid passport or UK national identity document
Tax at home and in Spain
Spain and the United Kingdom have a double taxation agreement in place, and a local tax adviser should confirm how rental income or gains from Spanish property must be declared and reported to HMRC.
Staying in Spain
As the United Kingdom is no longer an EU member state, British citizens may stay in Spain for up to 90 days in any 180-day period without a visa, and must apply for a visa or residence permit for longer stays.
Since the United Kingdom uses the pound sterling (GBP) rather than the euro, buyers should factor in exchange-rate movements and currency conversion costs when paying for a property or transferring funds to Spain.
Frequently asked questions
Why is the cadastral value on my IBI bill lower than what I paid for the house?
The valor catastral is an administrative figure reviewed only occasionally by the council and cadastre, so it often lags behind current market prices. It is not meant to reflect what a buyer would pay today; it exists purely to calculate taxes such as IBI, so a gap between the two figures is normal and not an error.
Can I reduce my transfer tax by agreeing a lower price in the deed?
Not reliably. Spanish tax offices now compare the agreed price with their own reference value, built from recent sales and cadastral data for the area, and charge ITP on whichever figure is higher. Declaring a lower price than the reference value can trigger a tax review rather than a saving.
Does the cadastral value change if I renovate the property?
It can, because councils periodically update values based on changes such as added surface area or significant works, though this is not automatic after every renovation. It is worth checking the cadastral record with a gestoría after major works, since an outdated or incorrect entry can affect future IBI and sale calculations.
How does the 3% withholding on sale relate to the plusvalía tax?
They are separate. The 3% withholding is taken by the buyer from the sale price and paid on account of your Spanish capital-gains tax as a non-resident seller. Plusvalía municipal is a different, local tax on the increase in the land's cadastral value during your ownership, owed to the town hall regardless of your actual profit.
Will HMRC also want to know about my Spanish property taxes?
Under the double taxation agreement between Spain and the United Kingdom, rental income or gains from a Spanish property generally need declaring in both countries, with relief available to avoid being taxed twice. A tax adviser familiar with both systems should confirm exactly how to report IBI, ITP context and any sale gain to HMRC.