Your employer, not you, applies the 30% ruling through payroll: instead of taxing your full gross salary as Box 1 income, they carve off up to 30% of it as a tax-free allowance and only run standard tax bands (35.75%, 37.56%, 49.50% for 2026) over the remaining 70%. You never see the tax-free portion taxed at all; it simply lands as extra net pay each month.
The eligibility test trips people up because it runs on the wrong number, on purpose. The Belastingdienst checks whether your TAXABLE salary, meaning your salary after the 30% carve-out already applied, clears the minimum threshold, not your headline gross figure. That's why the gross salary you actually need to qualify is noticeably higher than the taxable minimum quoted in most explainers: divide the taxable threshold by 0.70 to get the real gross bar.
Two tiers exist. Most applicants sit on the standard threshold. If you're under 30 with a qualifying Dutch Master's degree, or a foreign equivalent recognised by Nuffic, a meaningfully lower threshold applies, reflecting that early-career specialists typically earn less but can still be genuinely scarce-skill hires worth recruiting internationally.
The ruling runs for up to 5 years from when it's granted, flat at 30% for anyone starting in 2026 (the previously legislated 30-20-10 step-down was reversed by Parliament in 2025). It isn't permanent, though: from 1 January 2027 the flat rate itself drops to 27% for that year's rulings, and once your 5-year term ends, the allowance simply stops and your full salary reverts to standard Box 1 taxation.