IBI, Modelo 210 and the Autumn Bills Owners Forget

Autumn is when the Spanish property bills stop being theoretical. The IBI demand appears, someone mentions Modelo 210 in a WhatsApp group, and a non-resident owner who has done nothing wrong all year suddenly wonders whether they have. The two obligations are unrelated, and confusing one for the other is the single most common way owners end up with a surcharge they did not expect.

Two bills, two authorities, two dates

Start by separating them properly, because almost every autumn panic comes from treating them as one thing.

Both are mandatory for a non-resident owner. Paying one does not discharge the other, and neither one is collected on your behalf by anybody unless you have arranged it.

IBI: the bill your municipality sets

IBI (Impuesto sobre Bienes Inmuebles) is an annual municipal property tax based on the valor catastral of your property. Each municipality sets its own payment window, and those windows typically fall somewhere between September and November — which is why the bill lands now rather than on any national date.

The usual failure is not refusal to pay but absence. The demand goes to a Spanish address or a Spanish account, the owner is in Kent, and the first they know of it is a surcharge. A direct debit from a Spanish account solves most of it, provided the account is funded and still open.

Modelo 210: the return you file even with no income

Modelo 210 is the non-resident income tax return. If you own property in Spain and are not tax resident here, you must file it for renta imputada — imputed income — even where the property has never been let for a single night.

The logic is that Spain treats the availability of a second home as a benefit in itself and taxes a notional income from it. Whether you used the property or left it shuttered all year makes no difference to the obligation.

How the imputed figure is worked out

The calculation runs on the valor catastral, not on what you paid or what the property would sell for today:

• The imputed income is generally 1.1% or 2% of the valor catastral, depending on when the cadastral value was last revised.
• The tax rate applied is 19% for residents of the EU, Iceland and Norway, and 24% for everyone else.
• Since Brexit, UK residents fall into the 24% band.

That last point still catches people who bought before 2021 and have never rechecked their filings. The general rule is straightforward, but which percentage applies to your property depends on your municipality's revision history, so have a gestoría confirm the figures for your own case rather than copying a neighbour's.

The deadline that matters this year

For the 2025 tax year, the imputed-income Modelo 210 deadline is 31 December 2026. That is a long runway, which is exactly why it gets missed — there is no urgency in October, and by late December most people are elsewhere.

Filing it in the autumn, while you are already dealing with IBI and while your paperwork is in front of you, is simply easier than remembering it in the last week of the year.

What changes from the 2026 tax year

The filing calendar is moving, so anything you have written in a diary needs updating:

• For rental income, the filing period moves from 1–20 January to 1–20 April.
• For imputed income, the filing period begins on 1 April instead of 1 January.

These changes apply from the 2026 tax year, which is declared in 2027. They do not affect what you file this year for 2025. If you use a gestoría, they will already have this in hand; if you file yourself, move the reminder now while you are thinking about it.

The other autumn document nobody opens

The same fortnight that brings the tax paperwork is the sensible moment to look at the policy on the property, because it is the one annual document that renews silently whether or not it still describes reality. A few things drift:

• Unoccupied periods. If the property now stands empty from September to April, that is a material fact. Cover written for a permanently occupied home behaves differently from a holiday home policy that expects long gaps.
• The sum insured. Rebuild costs have moved, and the figure on your buildings and contents cover did not move with them. A sum insured set at purchase can leave you underinsured, which typically means a proportionate reduction in any settlement rather than a clean shortfall at the top end.
• The direct debit. If a Spanish account has been closed or left unfunded, the policy may have lapsed without you noticing. A lapsed policy also means no Consorcio de Compensación de Seguros cover, because the Consorcio surcharge that funds flood and other extraordinary risks is collected through the policy itself.
• Who is actually using the property. A home insurance policy arranged on completion day describes the house as it was then, not as it is now.

The IBI demand is a useful prompt precisely because it is unavoidable. When it arrives, check the policy at the same time.

A short autumn checklist

• Confirm your municipality's IBI window and that the direct debit is live and funded.
• Establish whether your 2025 Modelo 210 for imputed income has been filed, or diarise it well before 31 December 2026.
• Move your reminder for the 2026 tax year to the new April window.
• Read your policy schedule, check the sum insured and the declared occupancy, and confirm the premium is actually being collected.

The clean next step is to deal with the two tax obligations as separate items on the same afternoon, and to have a gestoría confirm which imputed-income percentage and which tax rate apply to your own property before you file anything.