How the plusvalía municipal is calculated, step by step

What the plusvalía municipal actually taxes

The tax's official name is Impuesto sobre el Incremento de Valor de los Terrenos de Naturaleza Urbana, tax on the increase in value of urban land, and that name carries the first thing to understand: what is taxed is the land, not the home standing on it.

When you sell a flat, the town hall is not charging you for the flat's appreciation. It is charging you for the appreciation of the share of ground that belongs to your unit in the building. So the starting figure is not the sale price, nor the property's cadastral value, but the cadastral value of the land, which is itemised on your IBI bill and in the Catastro's online office.

In an urban flat that value is usually a fairly small fraction of the total cadastral value. Confusing the two is by far the most common calculation error, and it always runs the same way: it produces a tax much larger than the one actually due.

Two exclusions are worth having in mind from the start. Article 104.2 leaves out land that counts as rural for IBI purposes. And article 104.3 puts outside the tax, among others, contributions of assets between spouses to the marital estate, and transfers of property between spouses or to children made in compliance with a judgment of nullity, separation or divorce.

Why there are two methods

Until 2021 there was only one. The town hall took the cadastral value of the land, applied a percentage based on years of ownership, and that was the base. The system had an obvious flaw: it assumed land always appreciated, including in the years when the property market was collapsing, so people selling at a loss ended up paying tax on a gain that did not exist.

The Constitutional Court narrowed that system in three successive judgments and, in 182/2021 of 26 October, struck the objective method down as the sole formula. Parliament responded with Royal Decree-Law 26/2021, which gave the tax the shape it has today:

• an objective method, using coefficients rather than annual percentages;
• a real method, which the taxpayer may ask for when it is more favourable (article 107.5);
• and an express exclusion where there was no increase in value (article 104.5).

The practical consequence is that the tax now has two possible figures and you pay on the lower one. But only if you ask. The plusvalía municipal calculator works out both and marks which is cheaper on your own numbers.

The objective method, step by step

Step 1: the cadastral value of the land

Take the cadastral value of the land at the date of transfer, not at purchase. If your town hall has approved a reducing coefficient in its ordinance, that value is reduced, by up to 15% (article 107.2.a).

Step 2: the complete years of ownership

Count whole years, with no fractions: article 107.4 says so literally, "sin tener en cuenta las fracciones de año". Nine years and eleven months are nine years.

The period is capped at twenty years (article 107.1). If you owned the home for forty years, the tax only looks at the last twenty.

There is a special rule for very quick sales: where the transfer happens before the first year is complete, the annual coefficient is prorated by complete months. Seven months pay seven twelfths of the first-year coefficient.

Step 3: the coefficient

This is the article 107.4 table as it stands today. It is worth reading carefully, because it is not a rising curve: it climbs to seven years, bottoms out between twelve and fifteen, and jumps sharply at twenty.

These are maximum coefficients. Each town hall approves its own in its ordinance and may set them lower, although in practice most sit at the legal ceiling.

If applying a coefficient and then a rate is the part that trips you up, how to calculate a percentage sets out the mechanics step by step.

Step 4: the rate

The taxable base is the land value times the coefficient. The town hall's rate applies to it, capped by article 108.1 at 30%. The same article also allows different rates for each period of generation, so ordinances with a scale of rates rather than a single one are common.

The 2026 coefficients: the increase that never stuck

This is where many sources have gone stale, and it deserves its own section because it changes the amount.

In December 2025, Royal Decree-Law 16/2025 of 23 December raised the maximum coefficients in article 107.4 with effect from 1 January 2026. It was published, came into force, and applied for a few weeks.

A Spanish decree-law, however, has to be convalidated by Congress within thirty days. On 27 January 2026 Congress did not convalidate it, and the Resolución de 27 de enero de 2026 published the decision repealing it. From 28 January 2026 the increase ceased to have effect.

The striking part is that exactly the same thing had happened a year earlier: Royal Decree-Law 9/2024 of 23 December raised the coefficients from 1 January 2025, and the Resolución de 22 de enero de 2025 left it without effect.

The upshot of that double reversal is that the last coefficient update still standing is the one in article 24 of Royal Decree-Law 8/2023, with effect from 1 January 2024. That is the table above, and it is the one to use today.

The real method: what you actually gained

Article 107.5 allows the objective base to be replaced by the real increase where the real one is smaller. The calculation has two parts.

First, the difference in prices. Sale price minus purchase price, as stated in the deeds. Article 104.5 is explicit that "los gastos o tributos que graven dichas operaciones" cannot be counted: not the notary, not the land registry, not the transfer tax or VAT you paid on buying, not the agency's commission. It is price against price.

Second, the land's share. Since the tax only reaches the land, that difference is multiplied by the proportion the cadastral land value represents of the total cadastral value. If the land is 40% of the cadastral value, the land takes 40% of the gain.

Where the acquisition or the transfer was for no consideration, that is by inheritance or gift, the figure standing in for the price is the one declared for inheritance and gift tax.

When nothing is payable

Article 104.5 puts a land transfer outside the tax where "se constate la inexistencia de incremento de valor", where it is established that there was no increase in value. If you sold for the same as or less than you paid, the tax is not triggered.

But the very next sentence of that article sets the condition: the taxpayer has to declare the transfer and produce the deeds documenting both the transfer and the acquisition. It is not automatic and the town hall does not check of its own motion. If nobody claims it, the assessment is made under the objective method, which never asks whether there was a gain.

One technical detail in the comparison is worth knowing: the value taken as sale or purchase price is the higher of the one in the deed and the one verified by the tax administration, where there was such a verification.

The four variables your town hall decides

Central statute sets ceilings; the actual amounts come from your municipality's ordenanza fiscal. There are four:

1. The rate, up to 30% (article 108.1), possibly on a scale by years.
2. The reduction of the cadastral value, up to 15% (article 107.2.a).
3. The coefficients, which may sit below the legal maximum (article 107.4).
4. The reliefs, up to 95% of the tax. Article 108.4 provides for them on transfers on death to descendants, spouse and ascendants, and 108.5 for land used for activities declared of special municipal interest.

None of the four is compulsory and none is the same everywhere. Before filing, your own town hall's ordinance is the source that governs.

Deadlines and who pays

Who pays (article 106.1): on transfers for consideration, such as a sale, the transferor. On transfers for no consideration, such as an inheritance or a gift, the recipient. Exception: where the seller is a non-resident individual, the buyer becomes substitute taxpayer and is liable for the payment. That seller also settles their own gain with the tax office on form 210, and the buyer will have withheld 3% of the price on account of it.

When (article 110.2): thirty working days from the taxable event for transfers between living persons; six months, extendable to a year on the taxpayer's request, for transfers on death.

Many town halls have adopted self-assessment, so the taxpayer does the calculation and pays within that same window.

A full example

A flat sold in 2026 after ten years.

• Total cadastral value: 100,000 €, of which the land is 40,000 €.
• Bought for 195,000 € and sold for 200,000 €.
• The town hall applies the maximum 30% rate, with no reduction and no relief.

Objective method. Ten-year coefficient: 0.12. Base: 40,000 × 0.12 = 4,800 €. Tax: 4,800 × 30% = 1,440 €.

Real method. Gain: 200,000 − 195,000 = 5,000 €. The land is 40% of the cadastral value, so it takes 5,000 × 0.40 = 2,000 €. Tax: 2,000 × 30% = 600 €.

Since 2,000 € is less than 4,800 €, article 107.5 allows that base instead. Asking for the real method saves 840 € here, and asking for it takes no more than producing the two deeds.

Notice what drives the difference: it is not a large gain, it is ten years of ownership with modest appreciation. Where appreciation has been strong, the objective method is usually the cheap one, because the coefficient has a ceiling and the real gain does not.