What Triggers an AEAT Tax Inspection for Non-Resident Property Owners in Spain in 2026: The Risk Factors

A guide to the data-matching mechanisms that surface non-resident property owners, and what reduces the risk of a full inspection.

AEAT does not pick non-resident property owners at random. Inspections are surfaced by data-matching: the Catastro register of every urban property is cross-referenced against Modelo 210 filings, bank-account and card-payment data flows in monthly, and the 3% buyer retention on every non-resident sale must reconcile against a final return. The 2026 Plan Anual de Control Tributario (Resolucion of 11 March 2026, BOE-A-2026-5843) explicitly names the real-estate and construction sector, individuals with relevant patrimonies, and the abusive use of instrumental companies as control priorities. The owners who get inspected are the ones whose filings do not line up with the data AEAT already holds.

What does an AEAT inspection actually involve for a non-resident owner?

A Spanish tax inspection is a formal procedure under Articles 142 to 152 of Ley 58/2003 (the General Tributaria, BOE-A-2003-23186), distinct from the lighter comprobacion limitada (limited verification, Arts 135 to 140) which only checks facts you have already declared. A full inspection can investigate new facts, request documentation and issue a regularisation. The maximum duration is 18 months, extended to 27 months when the circumstances of Article 150.1.b) apply.

For a non-resident property owner the inspection usually starts with a written communication from the DEICO (Departamento de Inspeccion y Comprobacion) naming the tax, the periods and the property. It is not a criminal procedure, but a verification of your tax position. You have the right to be assisted by a tax advisor (asesor fiscal) or lawyer (abogado), and the LGT requires AEAT to give you a hearing before any regularisation is liquidated. The companion guide to the Spanish tax audit process for non-residents walks through the procedure in detail; this page is about what opens that door in the first place.

How does AEAT cross-reference Catastro data with your Modelo 210?

Every urban property in Spain carries a referencia catastral, and the Catastro holds the title, the cadastral value and the use classification. The imputed-income rule in Article 13.1.h of the Ley del IRNR (Real Decreto Legislativo 5/2004, BOE-A-2004-4527) means a non-resident natural person who owns an urban property for own use, empty or vacant must file an annual Modelo 210 and pay IRNR on a deemed income. The base is 1.1% of the cadastral value for properties in municipalities where a collective valuation revision has entered into force in the last ten tax periods, or 2% otherwise. The rate is 19% for EU/EEA residents and 24% for the rest.

The cross-reference is mechanical. The Catastro gives AEAT the list of properties a non-resident owns and their cadastral values; the AEAT returns database gives the list of Modelo 210 filings. An empty property with no annual 210 on it is the most common flag, because the imputed-income rule applies whether or not the property is rented. A property that appears on the rental-register side of Catastro but with no quarterly rental 210 filed is a second flag. The 2026 control plan goes further: AEAT is building a consolidated map of urban property use across the common territory, drawing on its multiple information sources, to detect properties for which no filed return exists at all. The annual property taxes for non-residents guide covers the filing obligations in full; the point here is that the cadastral record is the backbone of the match, and the new map makes gaps harder to hide.

What role does bank information exchange (AEOI, DAC6, DAC7) play in flagging non-residents?

AEOI, the Automatic Exchange of Information under the OECD Common Reporting Standard, means Spanish financial institutions report account holdings and income of non-residents to AEAT, which shares the data with the account holder’s tax residence. From 2026 the Plan Anual de Control Tributario confirms AEAT receives this information monthly on bank-account holdings and on card-payment (TPV) income, where it was previously annual and often subject to thresholds. New declarative models 172, 173 and 721 expand the scope to digital and e-money products under the forthcoming DAC8 transposition, and a new Modelo 174 captures all card-payment data.

For a non-resident property owner the practical consequence is that rental inflows to a Spanish account, or the proceeds of a sale sitting on deposit, are visible to the risk engine. A tenant who pays by bank transfer into a Spanish account that has no corresponding quarterly Modelo 210 rental declaration is exactly the kind of inconsistency the monthly data surfaces. The 2026 plan also highlights information received under DAC7 from digital platforms (Modelo 238): rental income earned through platforms like Airbnb is reported by EU member states and by the UK, Canada and New Zealand under the multilateral competent-authority agreement, feeding AEAT’s risk analysis and selection. DAC6, transposed by Ley 10/2020 (BOE-A-2020-17265), adds a separate layer: intermediaries (lawyers, tax advisors, banks) must report cross-border arrangements that meet certain hallmarks, so a holding structure used to own Spanish property may already be on AEAT’s file before the owner is ever contacted.

How does the SAN 3630/2025 ruling change the audit risk for non-EU landlords?

On 28 July 2025 the Audiencia Nacional issued SAN 3630/2025 (ECLI:ES:AN:2025:3630), a ruling that changes the audit risk profile for non-EU property owners in Spain. The case concerned a United States resident who owned and rented property in Barcelona during 2016 to 2018. Under Article 24.1 of the Ley del IRNR, non-residents without a permanent establishment are taxed on gross rental income. Article 24.6 allows EU/EEA residents to deduct the expenses that a resident taxpayer could deduct, but the provision had been read as excluding third-country residents, so non-EU landlords paid the 24% flat rate on gross rental income with no deductions.

The Audiencia Nacional overturned the TEAC’s earlier rejection of the taxpayer’s claim. The court held that the exclusion of third-country residents from expense deductions is contrary to Article 63 of the TFEU (free movement of capital) and the non-discrimination clause in Article 25 of the Spain-US double taxation agreement. The court rejected the argument that the tax credit in the residence country removed the prejudice, and confirmed that the information-exchange mechanisms between the two states are fully operational, ruling out a risk of double deduction. The ruling is not final: the State Attorney may appeal to the Supreme Court, and the Cuatrecasas analysis notes that the TFEU Article 64.1 standstill clause (which permits restrictions on direct investment with third countries that existed before 31 December 1993) was not addressed in the proceedings, so the treatment of third-country rental expense deductions should not be considered settled.

The audit consequence is concrete. Before SAN 3630/2025, the risk engine flagged non-EU landlords who declared less than gross rental income. After the ruling, non-EU landlords can file rectifying returns claiming expense deductions for non-prescribed years, which shifts the risk surface from gross-income under-declaration to expense-deduction verification. AEAT will now cross-reference deducted expenses against the same data sources it uses for EU landlords: community fees, IBI, insurance, mortgage interest, repairs, utilities and depreciation. The IRNR non-resident income tax guide covers the deduction mechanics; the inspection angle is that a non-EU landlord who claims expenses for the first time is a new audit profile, and one whose deductions must withstand the same scrutiny as an EU filer’s.

What does the TEAC depreciation cap mean for non-resident landlords?

The TEAC issued Resolution 00/00653/2025 on 18 December 2025 in a procedimiento de alzada para unificacion de criterio, which makes its doctrine binding on all AEAT organs and on the regional and local economic-administrative tribunals. The criterion is that for rental property income, the accumulated depreciation deduction may not exceed the acquisition value of the construction (excluding the land value), regardless of the annual percentage applied to the cadastral value under Article 14 of the IRPF Reglamento. The practical issue is that many taxpayers and gestorias have calculated the annual 3% depreciation on the cadastral value, which can exceed the original acquisition cost, without tracking whether the cumulative total had already surpassed the legal cap.

The connection to non-resident audit risk runs through Article 24.6 of the Ley del IRNR, which allows EU/EEA residents to deduct the same expenses a resident would deduct under IRPF, including depreciation. After SAN 3630/2025 opened the door for non-EU landlords to deduct expenses too, the TEAC depreciation cap applies to them on the same footing. AEAT has already begun issuing provisional liquidations for the 2021 to 2024 tax years where accumulated depreciation exceeded the acquisition value, removing the deduction and adding late-payment interest. The IRPF 2021 tax year prescribes on 1 July 2026, so AEAT is accelerating these liquidations before the four-year window closes. A non-resident landlord who deducts depreciation without checking the cumulative cap is now a flaggable profile, whether EU or non-EU. The rental loss relief guide explains how negative rental income is treated; here the point is that a depreciation deduction above the cap is not a loss to carry forward but a regularisable expense.

How does Modelo 720 enforcement trigger an inspection?

Modelo 720 is the annual informative declaration of assets abroad (bank accounts, securities and insurance, and real estate). The sanction regime was reformed after the Court of Justice of the EU ruled against the old fixed-amount fines in case C-788/19 (27 January 2022). Ley 5/2022 removed the specific scale (EUR 100 per data with a EUR 1,500 minimum when filed spontaneously, EUR 5,000 per data with a EUR 10,000 minimum when filed after a request) and applied the general sanction regime of Articles 198 and 199 of Ley 58/2003 for both non-presentation and incorrect presentation.

The trigger mechanism is the cross-reference between foreign assets and domestic tax filings. If a non-resident declares foreign rental or investment income on a Spanish return but has not filed Modelo 720 for the underlying asset, or if a Spanish property is declared on a foreign return but the owner’s Spanish IRNR position does not reflect it, the mismatch surfaces. Sanctions apply separately for each of the three information blocks (accounts, securities, real estate), so an omission in one block is not offset by a correct filing in another. The Modelo 720 declaration guide covers the filing mechanics; the inspection angle is that the 720 database is one of the three pillars AEAT uses to verify a non-resident’s whole tax position.

What reconciles the 3% CGT retention against your final tax bill?

When a non-resident sells Spanish property, the buyer is obliged to retain 3% of the price and file Modelo 211 with AEAT. The seller then files a final Modelo 210 to settle the actual capital gains tax (19% flat on the gain for all non-residents) and either pay the balance or reclaim the difference against the 3% retained. The retention is a safeguard against the seller disappearing without settling; the final 210 is the reconciliation.

The trigger is the unreconciled retention. The buyer’s Modelo 211 is on file against the property’s title; if no matching final 210 arrives within the deadline (three months after the one-month buyer retention period, so roughly four months from the deed), the retention sits open and the file is flagged. A large gain with only a 3% credit is exactly the profile the risk engine surfaces, because the true liability at 19% of the gain is usually much higher than the 3% of price retained. The tax enforcement and collection guide covers what happens when a flagged file moves into the via de apremio; here the point is that the retention mechanism is itself a data-matching trap for owners who do not file the final return.

Which non-resident profiles does the 2026 control plan target most?

The 2026 Plan Anual names the control priorities explicitly and in detail. The real-estate and construction sector is singled out for reinforced control, with attention to property valuations in transfers (especially where related entities or corporate structures are involved), financial-cost deductions, abusive subcontracting, and the marketing and intermediation of sales and rentals. The plan also names individuals with relevant patrimonies, the abusive use of instrumental companies to avoid IRPF and wealth tax, and the verification of negative tax bases and pending credits. For non-resident property owners the profiles most likely to surface are:

Owners of multiple Spanish properties whose aggregate cadastral imputed income exceeds a threshold, now detectable through the consolidated urban-property-use map AEAT is building in 2026. Owners with a recent sale where the 3% retention is unreconciled. Owners whose Spanish bank inflows are inconsistent with their declared rental or sale income, now visible monthly rather than annually. Owners holding through a foreign company or trust that has been reported under DAC6, or whose rental income appears on DAC7 platform reports (Modelo 238). Non-EU landlords who, following SAN 3630/2025, file rectifying returns claiming expense deductions for the first time, and whose depreciation claims may exceed the TEAC 00/00653/2025 accumulated cap. And owners who simulate non-residence to avoid worldwide taxation while actually spending enough days in Spain to trigger tax residency under the 183-day rule, a profile the 2026 plan explicitly addresses under its patrimonial-analysis workstream.

The plan also introduces a new virtual assistant for the Impuesto sobre la Renta de No Residentes, which signals that non-resident compliance is a dedicated workstream rather than a side product of resident controls. In the non-resident area specifically, the plan highlights the FASTER Directive work on dividend withholding refund procedures, showing that AEAT’s non-resident control extends beyond property to all Spanish-source income. None of this means every non-resident is inspected; it means the risk engine is fed by more data, more frequently, than before.

How can a non-resident owner reduce inspection risk?

Risk factor	What AEAT cross-references	The trigger it risks	The tax at stake	How to reduce it
Unfiled Modelo 210 imputed income	Catastro cadastral record vs your 210 filings; 2026 consolidated property-use map	Empty or own-use property with no annual 210	IRNR 19% or 24% on imputed income plus surcharges	File the annual 210 for every owned property, rented or not
Rental income not declared	Monthly bank-account and TPV data (from 2026) vs your quarterly 210 rental filings; DAC7 platform reports (Modelo 238)	Tenant payments into a Spanish account with no rental 210; platform rental income with no matching return	IRNR 19% or 24% on rental income plus late-filing surcharge	Declare rental income quarterly on Modelo 210
Non-EU expense deductions post-SAN 3630/2025	Deducted expenses vs community fees, IBI, insurance, mortgage interest records	Rectifying return claiming expenses for the first time on prior years	Verification of each deductible expense item	Keep invoices and receipts for every claimed expense; file rectifications with supporting documentation
Depreciation above the TEAC cap	Accumulated depreciation vs acquisition value of construction (excl. land) per TEAC 00/00653/2025	Annual 3% on cadastral value exceeding the cumulative acquisition-cost cap	Removal of deduction, late-payment interest, potential sanction for 2021 to 2024	Track cumulative depreciation against acquisition value; stop claiming once the cap is reached
Modelo 720 omission	Foreign asset reports vs your IRNR and IRPF wealth declarations	Assets abroad not declared on 720 but income appears	General LGT sanction under Arts 198/199, per information block	File 720 annually for accounts, securities and real estate abroad
CGT retention mismatch	Buyer’s Modelo 211 (3% retention) vs your final Modelo 210	3% retained but no reconciling 210 within the deadline	IRNR 19% on the full gain plus surcharge	File the final Modelo 210 within three months of the buyer’s retention period
DAC6 reportable arrangement	Intermediary reports of cross-border structures	A holding structure flagged by an intermediary	Verification of the structure’s tax treatment	Confirm any cross-border structure has DAC6 clearance from your advisor
Simulated non-residence	Day-count data, centre-of-interests analysis, bank and property records	Spending 183+ days in Spain but filing only IRNR	Reclassification to IRPF on worldwide income plus sanctions	Confirm your day count and ties do not trigger Spanish tax residency

The common thread is filing consistency. An inspection is less likely when the returns you file match the data AEAT already holds: the Catastro knows what you own, the banks know what you receive, the buyer’s notary knows what you sold and for how much, intermediaries may have reported any structure you used, and digital platforms report rental income under DAC7. The tax prescription rules explain how long AEAT has to open a procedure (the general four-year prescription under Article 66 LGT), but prescription is a backstop, not a strategy. The strategy is to file every return the data-matching engine expects to see, and when the law changes, as SAN 3630/2025 did for non-EU expense deductions, to file the rectifying returns with full supporting evidence rather than waiting for the risk engine to find the gap first.