Spain leaves you with $7,736 more per year — a 14.5% net advantage over Greece on a $100,000 gross.

Both Spain and Greece operate on a worldwide-income basis, though each country's bracket structure and available regimes produce materially different outcomes. Top statutory rates are close — Spain at 47% vs Greece at 44% — so the outcome turns on bracket structure, social charges, and available regimes rather than the headline rate alone.

On a $100k single-resident employment profile under each country's default schedule, Spain produces the lower effective burden at 38.7% versus 46.5% in Greece — a 7.7 percentage-point gap that compounds to roughly $7,736 of additional take-home annually. Spain's uncapped social-security charge lifts its effective burden above what the bracket schedule alone would imply; Greece's contributions are capped, so high earners there pay a lower marginal social rate on income above the cap. Social-security contributions also differ: Greece charges 13.9% versus 6.3% in Spain, adding a second layer to the effective-rate spread that doesn't show in the income-tax brackets alone. The gap widens at higher incomes as marginal rates diverge further; remote workers earning above $150k or $200k should run the full engine scenario with their actual figures for a more precise read.

Both countries offer dedicated regimes for incoming professionals: Spain's Beckham Law and Greece's Greek Foreign Pensioner 7% (7% flat). Greece's regime runs for 15 years versus 6 in Spain — a longer runway worth factoring into a multi-year relocation plan.