Before you start

A foreigner ID number (NIE) and registration with Spanish Social Security via a local employer or autónomo registration
Tax residency status, which generally triggers once you spend more than 183 days in Spain in a calendar year (worldwide income then becomes taxable in Spain)
A decision, made early, on whether to elect the Beckham Law — the 6-month election window starts when you register with Social Security and cannot be reopened
A digital certificate, Cl@ve PIN or DNIe to file online with the AEAT

Step-by-step

1
Confirm whether you are a Spanish tax resident
You're normally a tax resident if you spend more than 183 days in Spain in the calendar year, or your main economic interests are here. Residents are taxed on worldwide income; non-residents only on Spanish-source income (Modelo 210). Residency, not your visa, decides which regime applies.
OnlineWho: You (self-assessment)Assessed per calendar yearFree
2
Decide on the Beckham Law and elect it in time
If you moved to Spain for new employment (and weren't Spanish-resident in the prior 5 years), you can elect the special impatriate regime: a flat 24% on Spanish employment income up to €600,000 (47% above), with foreign income largely outside scope and wealth tax limited to Spanish assets. You elect by filing Modelo 149 within 6 months of registering with Social Security. This shelters you from Catalonia's high IRPF scale and its wealth tax for up to 6 years.
OnlineWho: You or your tax adviser (gestor)File Modelo 149 within 6 months of Social Security registration; regime lasts up to 6 yearsFree to file; advisers typically charge ~€200-600
3
Have your employer apply payroll withholding (retención)
Spanish employers withhold IRPF from each payslip and remit it to the AEAT, so most of your tax is paid as you earn. Under Beckham, withholding is the flat 24% (up to €600,000). Under the ordinary regime, withholding is estimated against the combined state + Catalan scale, so a Barcelona payslip is withheld more heavily than the same salary in Madrid.
Via employerWho: Your employer's payroll departmentEvery payroll cycleWithheld from gross salary
4
File your annual return (Renta) the following spring
Ordinary residents file the annual IRPF return on Modelo 100 during the Renta campaign, roughly early April to 30 June for the previous year's income (direct-debit payers file by ~25 June). Beckham-regime taxpayers instead file Modelo 151 over the same window. This is where Catalonia's regional scale and deductions are actually applied.
OnlineWho: You or your gestor, via AEAT Renta WebApprox. 8 April to 30 June each yearFree to file; advisers from ~€100-300
5
Check your wealth-tax exposure (Catalonia-specific)
If you're an ordinary resident, Catalonia levies the Impost sobre el Patrimoni on net worth above roughly €500,000 (with ~€300,000 of your main home also exempt), at progressive rates rising toward 2.5-3.5% at the very top. It's declared on Modelo 714, administered by the Agència Tributària de Catalunya. Madrid residents pay zero on the equivalent because of a 100% rebate — a major reason wealthy individuals favour Madrid. Beckham-regime filers are only assessed on Spanish-situated assets.
OnlineWho: You or your gestor, via the Catalan tax agency (ATC) / AEATFiled alongside the Renta campaign (by 30 June)Tax due depends on net wealth above the threshold

Documents you’ll need

NIE certificate and proof of Social Security registration
Modelo 149 (Beckham Law election) or, for ordinary residents, nothing extra to opt in
Annual return: Modelo 100 (ordinary residents) or Modelo 151 (Beckham regime)
Modelo 714 wealth-tax return (and Modelo 718 solidarity tax) if your net assets exceed the thresholds

Things most newcomers don’t know

Barcelona's headline disadvantage is the regional half of IRPF: Catalonia's scale stacks with the state scale to roughly 50% combined at high incomes, versus ~45-47% in Madrid.

IRPF is half state, half regional, and Catalonia sets among the highest regional rates and reaches its top bracket at a lower income than many regions. Two people on the same salary keep noticeably less in Barcelona than in Madrid once they're off the Beckham regime.

Source: Agència Tributària de Catalunya / Decree-Law 5/2025

The wealth tax is the bigger, less obvious gap: Catalonia charges it above ~€500,000, while Madrid zeroes it out with a 100% rebate.

For someone with meaningful savings, property or investments, living in Barcelona as an ordinary resident can add an annual wealth-tax bill that the identical person in Madrid simply does not pay — a decisive factor for high-net-worth relocations.

Source: Agència Tributària de Catalunya (Impost sobre el Patrimoni)

The Beckham Law is the single most valuable move for an inbound professional in Barcelona: it neutralises both the high Catalan IRPF and the wealth tax for up to 6 years.

Because the 24% flat rate is national, it erases Catalonia's rate disadvantage entirely (and limits wealth tax to Spanish assets). The catch is the hard 6-month deadline to file Modelo 149 — miss it and you're locked into the ordinary Catalan regime for that move.

Source: AEAT — special regime, art. 93 IRPF Law

A separate national 'solidarity' wealth tax (ITSGF, Modelo 718) bites above €3 million, but in Catalonia you credit the regional wealth tax already paid against it.

The ITSGF was made permanent from 2025 largely to claw back what Madrid's rebate gives up. Catalan residents who already pay the regional wealth tax usually owe little or no extra — for most Barcelona movers below €3 million it's simply not in scope.

Source: AEAT — Temporary Solidarity Tax on Large Fortunes

Common mistakes to avoid

Missing the 6-month Modelo 149 deadline. The Beckham election window starts at Social Security registration and cannot be reopened; miss it and you default to the full Catalan IRPF scale plus wealth tax.
Assuming the wealth tax doesn't apply because it's unfamiliar. In Catalonia it's live above ~€500,000 and must be self-declared on Modelo 714 — unlike Madrid, there's no rebate.
Forgetting that ordinary residents are taxed on worldwide income and may owe the informational Modelo 720/721 on foreign assets above €50,000, with steep penalties for non-filing.
Treating Barcelona and Madrid as tax-equivalent. The state portion is identical, but the regional scale, the wealth tax and the deductions differ enough to produce a materially higher bill in Barcelona.