Documenting your travel and residence pattern before Hacienda asks

Key rules

• Burden of proof: If you claim to be non-resident, you must prove the facts behind that claim.
• Tax residence certificate: It proves residence abroad under a treaty, but not your individual days.
• Keeping records: Keep evidence at least four years after the filing deadline, and longer if a dispute is open.

Who has to prove what

Both sides have a job. Hacienda must show the facts that make you resident in Spain, such as more than 183 days here or your main economic interests being here. If you say you live abroad, expect to be the one holding the proof.

Courts accept that days in Spain can be shown by evidence and inference, not only by a stamp. Short absences usually count as time in Spain unless you show residence elsewhere with a certificate. The exception is the family presumption: if your spouse and children live here, you are presumed resident and the burden of rebutting it is yours.

What Hacienda can already see

Hacienda cross-checks your story against data it holds. This can include:

• the padrón (your local residents' register), property and land registry records, and notary data
• bank and card information reported by banks, and foreign assets reported on Modelo 720 and Modelo 721
• electricity and water consumption
• reports from employers and banks, such as Modelo 190 and Modelo 347
• Social Security and health registrations, driving licence and vehicle data
• airline and passenger data and phone data, which can be requested during an inspection
• social media and your public activity

Which sources are used varies from case to case. The practical point: your records must match what these show.

What counts as proof

There is no closed list. Any evidence valid in law is accepted, and the inspector decides how much each document weighs. Two principles help:

• Official documents beat self-made ones. A signed statement of your own days carries little weight alone.
• Everything must be consistent. A lease abroad and a tax residence certificate lose force if your card spending and phone use show you in Spain.

The most useful single document is a tax residence certificate from the other country's tax authority. It proves you are resident there under a tax treaty. It does not prove individual days, so pair it with day-level records.

For days, use passport stamps, tickets and boarding passes, hotel bookings, card and bank statements, utility bills, phone-roaming records, and employer letters, payslips and work-location records. For each home, keep the lease or property deeds and the utility, phone and internet bills. Keep proof of your registrations (the padrón, the foreign population register, social security, health insurance) and records of any business, directorship or investment that show where it is based.

Build the record as you go

Keep a day-by-day calendar of where you slept, and back each trip with a ticket or statement. It is far easier to do this during the year than to reconstruct it years later when Hacienda writes. If Hacienda writes to you about your residence, you answer with your day calendar, your tickets and statements, and your tax residence certificate, all matching each other.

How long to keep it

Keep the evidence for each year's return for at least 4 years after the voluntary filing deadline, and for 5 to 6 years to be safe. The four-year period restarts when Hacienda or you take certain actions. Keep everything while a dispute is open, and keep the records behind carried-forward losses or credits for up to 10 years.