Modelo 720 in Spain: The Overseas Asset Declaration Guide (2026)

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The Modelo 720 is the form that keeps British, Irish, and American expats up at night — not because it’s complicated, but because the penalties for getting it wrong used to be catastrophic. Spain famously imposed fines of €5,000 per undeclared data item, with a minimum of €10,000. Own three bank accounts and a pension abroad? That could be €20,000 in fines.

The good news: the European Court of Justice struck down those penalties as disproportionate in January 2022. The bad news: the filing obligation itself didn’t change. You still have to declare, and Hacienda can still treat undeclared overseas assets as unjustified income — meaning full income tax plus interest.

Here’s everything you need to know to file correctly in 2026.

Who Has to File Modelo 720?

You must file if all three conditions are true:

1. You’re tax resident in Spain — meaning you spend 183 or more days per year in Spain, or Spain is the centre of your economic interests, or your spouse and minor children live in Spain (unless you can prove tax residency elsewhere). An NIE or residency card alone doesn’t make you a tax resident — tax residency is the test.
2. You hold assets outside Spain — bank accounts, investments, property, pensions.
3. The total value exceeds €50,000 in at least one of the three categories — the threshold applies per category, not in total across all categories combined.

The Three Categories: C1, C2, C3

This is where most people trip up. The €50,000 threshold is assessed independently for each of the three categories. You can hit one without hitting the others.

Category	What’s Included	What You Declare
C1 — Bank Accounts	Current accounts, savings accounts, term deposits held in banks outside Spain	Account number, institution name, country, balance on December 31, and average balance in Q4 (October–December)
C2 — Securities & Investments	Stocks, bonds, investment funds, ETFs, pensions (defined contribution), insurance policies with surrender value, crypto on foreign exchanges (since 2023)	Institution name and country, account/policy reference, value on December 31
C3 — Real Estate	Any property or real estate rights outside Spain (full ownership, usufruct, bare ownership)	Address, date of acquisition, acquisition value (what you paid — not current market value)

Each category is independent. If you have €80,000 in UK bank accounts but only €30,000 in UK investments, you declare C1 but not C2. A UK property you paid €90,000 for (now worth €150,000) is declared at the €90,000 acquisition value.

Common Situations for Costa del Sol Expats

UK defined contribution pension (SIPP, personal pension, workplace DC)

If your pension pot exceeds €50,000 — and most do — it falls under C2. This catches nearly every British expat on the Costa del Sol. The value you declare is the pension fund value on December 31 of the reporting year.

The important distinction: defined contribution pensions (where you have a specific pot) are declarable. Defined benefit pensions (final salary schemes, where you have an entitlement to a future income rather than a pot) are generally exempt from Modelo 720 until you begin drawdown — at which point they may shift to C2. The UK state pension is not declarable. If you’re unsure which type you have, check your pension paperwork or ask your provider: it will say “defined benefit” or “defined contribution.”

UK property you kept when you moved to Spain

Declarable under C3, regardless of whether it’s rented out or sitting empty. The value you declare is the acquisition value — what you paid for it, not what it’s worth now. This surprises many people: a house bought for £120,000 that’s now worth £320,000 is declared at the original purchase price (converted to euros at the December 31 ECB rate). Keep your original conveyancing documents — you’ll need the purchase price.

US 401(k) or IRA

Declarable under C2. American expats also face FATCA and FBAR reporting obligations to the IRS alongside Spain’s Modelo 720 — double the paperwork, double the reason to use a professional.

Cryptocurrency on foreign exchanges

Since the 2023 filing year, cryptocurrency held on foreign exchanges must be declared under C2 if the value on December 31 exceeds €50,000. “Foreign” means the exchange is not headquartered in Spain — so Binance, Coinbase, and Kraken all count. If you hold crypto in self-custody wallets (hardware wallets, software wallets), this is a grey area: Spain has introduced a separate Modelo 721 for crypto-specific reporting. Get current advice from your gestor on how to handle self-custody crypto, as requirements are still evolving.

Joint accounts and joint ownership

Each account holder declares their proportional share. For a joint account split 50/50, each person files declaring 50% of the balance. Both you and your spouse file separately — joint filing is not an option for Modelo 720.

The Deadline: March 31

The filing deadline is March 31 for assets held on December 31 of the previous year. There are no extensions. In years like 2026, the March 31 deadline falls in the middle of Semana Santa, with many gestorías working at reduced capacity. Start gathering your documents in January — do not leave this until mid-March.

You need to file for the Spain expat tax deadline calendar alongside Modelo 720 — multiple deadlines cluster in the March–June window.

When You Don’t Need to Refile

Modelo 720 is not necessarily an annual filing forever. After your initial declaration, you only need to file again if:

• The value of any declared category has increased by more than €20,000 since the last time you filed for that category
• You’ve acquired new overseas assets — a new bank account abroad, a new property, a new pension
• You’ve closed or disposed of previously declared assets (sold a property, cashed in a pension)

If nothing significant has changed, you don’t refile. But many gestorías recommend filing annually anyway for a modest fee (~€100–200) to maintain a clean compliance record — especially in the first few years after becoming Spanish tax resident, when the asset picture is still settling.

The “silent non-compliance” trap

Here’s the scenario that catches people: you filed Modelo 720 in 2021 when you first became tax resident. Your investment portfolio was €55,000. You didn’t check again because “nothing changed.” By 2024, the portfolio had grown to €82,000 through investment gains — an increase of €27,000. You were required to refile in 2024 for the 2023 tax year and didn’t, because you didn’t notice the growth.

This is silent non-compliance. Your assets are growing toward (or past) the re-filing threshold without you realising it. The fix: check your December 31 portfolio value every year against your last declared amount. A 10-second check each January prevents the problem entirely.

The ECJ Ruling: What Changed in 2022

In January 2022, the European Court of Justice ruled in Case C-788/19 that Spain’s penalty regime for Modelo 720 was incompatible with EU law. The old regime was genuinely punishing: €5,000 per data item not declared or declared late, minimum penalty of €10,000, with the additional sting that undeclared assets could be treated as income from the current year (not the year acquired), bypassing the statute of limitations entirely.

What was struck down by the ECJ ruling:

• The €5,000-per-data-item fines (minimum €10,000)
• Treating undeclared assets as income from the current tax year regardless of when acquired
• The effective removal of any statute of limitations on undeclared overseas assets

What remains after the ruling:

• The filing obligation itself — Modelo 720 is still mandatory when you meet the criteria
• Standard late-filing penalties — Hacienda can impose regular administrative penalties for late or missing filings (€100–400 for the form itself)
• Income tax on undisclosed income — if Hacienda discovers undeclared overseas income through your undeclared assets, they can assess income tax plus surcharges and interest for open tax years (normally the last 4 years)
• Treatment as unjustified income — if assets were never declared and Hacienda cannot establish they existed before you became Spanish tax resident, they can still be treated as undeclared income, though now subject to the standard statute of limitations
• A red flag in any tax investigation — not filing raises a flag, particularly as international data sharing improves

Bottom line: the nuclear penalties are gone, but non-compliance still carries real risk — and the cost of filing (€100–300 through a gestor) is trivial compared to the potential consequences of not filing.

Step-by-Step: How to File Modelo 720

Modelo 720 is filed electronically only — there is no paper version.

Step 1: Gather your December 31 statements

You need statements dated (or covering) December 31 of the year you’re reporting. Banks and investment platforms often generate year-end statements in January — request them early.

• Bank accounts (C1): year-end balance + average Q4 balance (October–December). Not all banks provide Q4 averages automatically — you may need to calculate from monthly statements.
• Investments and pensions (C2): year-end portfolio valuation, account or policy reference number, institution name and country.
• Property (C3): original purchase documents showing acquisition date and price, full address, your ownership percentage.

Step 2: Convert values to euros

All values must be reported in euros. Use the official ECB (European Central Bank) reference exchange rate for December 31 of the reporting year. Check the ECB website for the official rate — don’t use a bank’s exchange rate or Google’s spot rate. Keep a record of the rate you used.

Step 3: Access the AEAT platform

File through the AEAT website (sede.agenciatributaria.gob.es) using one of:

• Digital certificate (certificado digital) — the most reliable method. Obtain one from the FNMT (Fábrica Nacional de Moneda y Timbre): apply online, then verify in person at a government office, some gestorías, or via video call in some cases. Free to obtain. See our guide on getting a digital certificate in Spain.
• Cl@ve PIN — Spain’s national digital identity system. Easier to set up but some users report intermittent issues with the AEAT platform.

Step 4: Complete and submit the form

The form requires specific data formats and field codes. A single error in account number formatting or category classification can trigger a query from Hacienda. Most expats use a gestoría for this step.

Step 5: Keep the confirmation and your workpapers

Save the submission confirmation (the AEAT platform generates a PDF receipt), and store your supporting statements and calculations. If Hacienda ever asks how you arrived at a number, you want to be able to answer in minutes.

Using a gestoría

In practice, most expats on the Costa del Sol hand this to a gestoría. The process: you provide your year-end statements and asset details, the gestor extracts the required data, files the form, and keeps a copy on record. Cost: €100–300 depending on complexity (more categories, more assets, more cost). That’s the best €200 you’ll spend in March.

Modelo 720 and the Beckham Law

The Beckham Law (Spain’s special expat tax regime, also known as the impatriate regime) allows qualifying new arrivals to pay a flat 24% tax rate on Spanish income. It does not exempt you from Modelo 720.

Under the Beckham Law, you are technically treated as a non-resident for income tax purposes — but the Spanish Tax Authority’s position is that the Modelo 720 filing obligation still applies to Beckham Law taxpayers who hold overseas assets above the thresholds. Your gestor should confirm how this applies in your specific situation, but do not assume Beckham Law status exempts you from the overseas asset declaration.

Modelo 720 Is Not Your Tax Return

A critical point of confusion: Modelo 720 is an informative declaration, not a tax payment form. Filing it does not generate a tax bill. It tells Hacienda what you own abroad.

Your actual tax obligations on overseas assets — rental income from UK property, pension withdrawals, capital gains tax on investments — are reported through your annual declaración de la renta (Modelo 100/IRPF), which is due in June. The two forms must be consistent: if you declare a UK rental property on Modelo 720, Hacienda expects to see the rental income on your IRPF return. Mismatches are what trigger audits.

See our guides on income tax in Spain and the Spain 183-day rule for how your Spanish tax position works alongside Modelo 720.

Common Expat Mistakes

Forgetting SIPPs and personal pensions

The most common oversight among British expats. Your SIPP doesn’t send you a reminder that it needs to appear on Modelo 720. By the time you move to Spain, your pension pot is often well past the €50,000 threshold. Don’t assume your gestor knows about it — you need to tell them what you have.

Not counting joint accounts at full value

If you have a joint account with a balance of €60,000, each holder declares €30,000 — which is below the €50,000 threshold. If you have two joint accounts totalling €60,000 across the same category, the threshold calculation combines all C1 accounts: €60,000 total, both holders file. Many people misunderstand this and think joint accounts always halve the reportable amount below the threshold.

Missing the March 31 deadline

It is a hard deadline with no extensions. Gestorías are swamped in March. If you haven’t contacted your gestor by February, you risk missing the slot. Some gestorías require documents at least two weeks before March 31.

Using market value instead of acquisition value for property

UK property declared under C3 uses the acquisition value (what you paid), not current market value. Using the wrong figure can create inconsistencies that trigger Hacienda queries on future sales.

Assuming the Beckham Law or non-habitual residency exempts you

It doesn’t. The filing obligation under Modelo 720 applies to Beckham Law taxpayers who meet the criteria. Get clarity from your gestor before assuming you’re exempt.

Ignoring small crypto holdings that grew

That €30,000 crypto position from 2021 that tripled in 2024? Now potentially in Modelo 720 territory, and you may have missed the re-filing trigger without realising it.

What to Gather Before Filing

For bank accounts (C1):

• Year-end statement showing balance on December 31
• Average balance for Q4 (October–December) — calculate from monthly statements if your bank doesn’t provide this
• Full bank name, branch country, IBAN or account number

For investments and pensions (C2):

• Year-end valuation statement (December 31 value)
• Institution name and country
• Account or policy reference numbers
• For UK pensions: request a valuation from your provider — this is sometimes only issued on request
• For crypto: exchange year-end portfolio summary or screenshot of December 31 balance

For property (C3):

• Full address of the property
• Date of acquisition
• Acquisition value (what you paid, in local currency — your gestor converts to euros)
• Your percentage of ownership if shared

What Happens If You Haven’t Filed in Previous Years

If you’ve been tax resident in Spain for some time and are only now discovering Modelo 720, don’t panic and don’t ignore it. With the ECJ ruling having neutralised the extreme penalties, voluntary late filing is treated much more leniently than it was before 2022.

1. Confirm which years you were Spanish tax resident — not just physically present. The tax residency tests determine this.
2. Confirm which years the thresholds were exceeded per category for those years.
3. Get professional help to regularise. A gestor can file for previous years. You may face a small administrative penalty (€100–400 per missed filing), but this is far better than Hacienda discovering the gap themselves through international data exchange.

International information sharing is getting more comprehensive every year. UK banks report to HMRC; HMRC shares with Spain under CRS. If your UK assets are visible to Hacienda through CRS data and you haven’t filed a Modelo 720, that’s a problem waiting to surface.

Frequently Asked Questions

Related Guides

• Income Tax in Spain: Complete Expat Guide
• Tax Residency in Spain: How It Works
• The Spain 183-Day Rule Explained
• The Beckham Law: Spain’s Special Expat Tax Regime
• Getting a Digital Certificate in Spain
• Spain Expat Tax Deadlines 2026
• Spain’s Cash Payment Rules