Dutch Box 1 Tax Calculator: Netto Salaris 2025 (Loonheffing + Premies)

The combined Box 1 rate

What looks like a simple 35.82 percent income tax in the first bracket is actually two layers stacked together: AOW (state pension) and other premie volksverzekeringen contribute about 27.65 percent, and pure income tax contributes 8.17 percent. Above the AOW age of 67, the first-bracket combined rate falls to about 17.9 percent because the AOW premium no longer applies. This calculator uses the under-67 combined rate; a senior overlay is on the roadmap.

The second-bracket rate of 37.48 percent is essentially the income tax portion only, because the premie volksverzekeringen cap is reached around the first-bracket ceiling. The 49.5 percent top rate kicks in above €76,817 and is pure income tax. For most salaried workers the second bracket is where most of the marginal rate action happens.

Algemene heffingskorting and arbeidskorting

Dutch tax credits are central to the system. The algemene heffingskorting is up to €3,068 in 2025 for incomes up to €28,406, tapering to zero at higher incomes. The arbeidskorting (labour credit) can be substantially larger for middle incomes, peaking around €5,000 for salaries between €37,000 and €43,000. The calculator currently applies only the algemene heffingskorting as a flat credit, which is an under-estimate of total credits for most salaried workers. Adding the arbeidskorting in a future version is the single highest-impact accuracy improvement.

Pension premiums

The Netherlands has one of the most extensive workplace pension systems in Europe. Most employees contribute to a sectoral or company pensioenfonds; the employee share of the premium is withheld from gross before loonheffing is computed, so it reduces taxable income at the marginal rate. A €4,000 pension premium at the 37.48 percent bracket saves €1,499 in tax compared with the same amount left as salary. The pensioenfonds typically requires both employee and employer contributions; only the employee share enters this calculator.

The 30 percent ruling

The 30 percent ruling allows employers to designate up to 30 percent of an eligible incoming expat's salary as a tax-free reimbursement of extraterritorial costs. The ruling has been progressively tightened since 2024: maximum duration of five years, salary thresholds, and a phase-down to 20 percent and 10 percent in the later years are all part of the current framework. The calculator does not yet model the ruling; expats on the 30 percent ruling should treat their effective taxable salary as 70 percent of gross and rerun the calculator on that amount for a rough estimate.

What this calculator does not include

Arbeidskorting (labour tax credit, the biggest omission). The 30 percent ruling for expats. Mortgage interest deduction (hypotheekrenteaftrek) on the eigen woning. Box 2 (substantial-interest dividends) and Box 3 (savings and investments) income. Inkomensafhankelijke bijdrage Zorgverzekeringswet for self-employed. Bijzonder tarief for bonus and 13th-month payments. For most salaried Box 1 workers without a 30 percent ruling and without an eigen woning, the calculator gives a reasonable lower bound on net pay; arbeidskorting will move the actual figure up by a few thousand euros for typical incomes.

When to expect the actual net to be much higher

Three scenarios produce a real net substantially higher than this calculator shows. First, mid-income workers (€37k to €43k) where the arbeidskorting peaks near €5,000 of credit. Second, incoming expats on the 30 percent ruling, where 30 percent of salary is treated as a tax-free reimbursement for the first qualifying years. Third, homeowners with an eigen woning mortgage where the hypotheekrenteaftrek reduces taxable income at the marginal Box 1 rate. The first two are on the roadmap; the third requires a property-specific input that may ship as a separate calculator. For all three cases, treat the figure here as the conservative case and expect headroom upward.