Biotech and pharma executives, clinical trial income, university endowment trustees and Massachusetts exit planning for professionals moving to Spain.
Key Issues
Boston's biotech corridor produces executives with complex equity packages — pre-IPO options in clinical-stage companies, milestone-based RSUs, and patent royalties from licensed technology. Royalties from US patents paid to a Spanish resident may be subject to treaty withholding and credit coordination under the Spain-US treaty Article 12.
Harvard, MIT and other Boston institutions have trustees and fund managers who may be considering a Spain move. Trustee compensation and investment advisory fees from US sources continue to be US-taxable. The Spain-US treaty's saving clause ensures the US retains its right to tax US citizens on US-source income regardless of treaty benefits claimed.
Massachusetts imposes income tax on all Massachusetts-source income for non-residents. The transition from MA resident to non-resident requires careful timing of income recognition — particularly for bonus payments, option exercises, and research grants — to minimise MA non-resident return obligations that persist post-move.
Key Tax Topics
Massachusetts residency abandonment and Spanish IRPF first-year analysis. Timing around academic year and grant periods for researchers relocating to Spanish universities or institutes.
Spain-US treaty Article 12 (royalties) for patent and technology licensing income. Article 20 (teachers and researchers) for academics on exchange programmes or Spanish university appointments.
FBAR, FATCA, Model 720. Massachusetts non-resident returns for continuing MA-source income. Reporting of Spanish research grants on US returns.
Beckham Law for qualifying biotech executives seconded to Spanish pharmaceutical subsidiaries. Pre-move option exercise planning for clinical-stage biotech equity before Spanish residency commences.
Jacob Salama has advised US clients from Boston's biotech and academic communities on their Spanish tax position.
Biotech equity, patent royalties, Massachusetts exit — book a free 30-minute consultation to model your tax position before the move to Spain.
Book via CalendlyMany US nationals who have been living in Spain for months or years without filing Spanish returns, or without disclosing US accounts to the AEAT via Modelo 720, find themselves in a position of historical non-compliance. Jacob Salama regularly assists clients in regularising their position across both jurisdictions before the relevant authorities identify the gaps.
On the US side, the IRS Streamlined Procedures (Streamlined Foreign Offshore Procedure for bona fide foreign residents, or Streamlined Domestic Offshore for US-based filers) provide a reduced-penalty path for non-wilful failures to file FBARs, Form 8938, and delinquent income tax returns. Eligibility requires that the failure was non-wilful — meaning it resulted from a lack of understanding of the obligations rather than a deliberate decision to conceal assets.
On the Spanish side, voluntary disclosure of previously unreported foreign assets and income prior to an AEAT investigation significantly reduces penalties and eliminates the risk of criminal referral. The 2022 reforms to Modelo 720 — following the ECJ C-127/12 ruling — removed the most disproportionate penalties, but late filing remains subject to standard tax surcharges under the Ley General Tributaria.
When a Boston resident establishes tax residency in Spain, they simultaneously exit a US state tax regime and enter Spain's IRPF system — which taxes worldwide income at rates up to 47% for general residents, or at a flat 24% for those qualifying under the Beckham Law (Article 93 LIRPF, expanded by the 2022 Startup Law). Massachusetts is one of the more aggressive state tax authorities outside California and New York. Boston residents must exit before day 183 of the tax year and ensure all Massachusetts domicile indicators are terminated before establishing Spanish residency.
The US-Spain DTA (1990, amended by the 2013 Protocol) contains a Saving Clause under Article 1(4) preserving the US right to tax its citizens worldwide. The foreign tax credit under Article 24 and IRC §901 is the primary double-taxation relief mechanism, but its correct application requires careful sequencing between the two systems.
| Tax | In Boston | In Spain |
|---|---|---|
| Massachusetts state income tax | 5% flat rate (9% on long-term capital gains above threshold) | Eliminated on departure |
| US federal income tax | 10%–37% | Still applies (Saving Clause) |
| Spanish IRPF — employment | N/A | 24% (Beckham) / up to 47% |
| Spanish IRPF — savings/investment | N/A | 19%–28% |
| Modelo 720 / FBAR / FATCA | FBAR + FATCA only | Modelo 720 + FBAR + FATCA |
Traditional 401(k) and IRA distributions are treated as private pension income under DTA Article 17. Spain has the primary taxing right once the recipient is a Spanish tax resident. Contributions made on a pre-tax basis and their accumulated growth are subject to IRPF on withdrawal at rates up to 47% under the general scale or 24% under the Beckham regime.
Roth IRA distributions present a well-documented double-taxation trap. The IRS treats qualified Roth distributions as tax-free. Spain does not recognise this exemption — the AEAT treats Roth IRA distributions as taxable investment income under IRPF, meaning contributions already subject to US tax may be taxed again in Spain with no DTA remedy.
Pre-departure planning should address: timing of Roth conversions before establishing Spanish residency; evaluation of accelerated distributions while still a US resident; rollover strategies that simplify Spanish reporting; and Modelo 720 planning — Spanish residents must declare foreign pension accounts above €50,000 per category annually.
Boston's concentration of pharmaceutical, biotech and academic institutions creates cross-border tax issues that require specialist knowledge of both the US-Spain DTA and Spanish intellectual property tax rules. Patent royalties and research licensing income paid by Massachusetts institutions to a Spanish-resident recipient are US-source income under DTA Article 12 — the US withholds at 5% (reduced under the treaty), and Spain allows a credit for the US withholding against the Spanish IRPF on that income.
Clinical trial participants who receive compensation from Boston research institutions while resident in Spain must report those payments as Spanish IRPF income — they are not exempt under any DTA provision. Similarly, academic honoraria paid by Boston universities for lectures or expert opinions delivered from Spain are Spanish-source income for IRPF purposes.
Massachusetts applies its 9% rate on long-term capital gains above certain thresholds — a departure-year disposal of appreciated biotech stock should be carefully timed relative to the date of Spanish residency to determine which system applies to the gain. The timing of the disposal, the establishment of Spanish padron, and the application for Beckham Law treatment are interdependent decisions that require coordinated planning.
