The short answer
Loonheffingskorting reduces payroll withholding. If two employers apply it at the same time, they can both give you credit without knowing about the other income.
Apply the payroll credit to no more than one income
Tell each employer whether it should apply the credit and confirm the setting on your payslip. When changing jobs, keep the start and stop dates consistent.
Combined annual income still matters
Using the credit at one employer avoids duplicate application, but does not guarantee that withholding matches final tax. Each payroll sees only its own wage, while the annual assessment combines income. An official provisional assessment can help spread a likely additional payment. Include occasional jobs and benefits when assessing the whole year.
What to do next
- Check the tax-credit line on each current payslip.
- Ask the relevant employer to start or stop it in writing.
- Estimate combined annual income and consider a provisional assessment.
One employer pays €1,800 gross monthly and another pays €900. Each payroll has incomplete information about the other wage. Your final tax calculation looks at both incomes together.
Questions people ask
Can both employers apply the credit?
No. Apply payroll tax credits to at most one income at the same time.
Which employer should I choose?
Review the official guidance for your combination of incomes. Choosing one does not remove the need to check total annual tax.
How can I see whether it is applied?
Look for loonheffingskorting or a tax-credit indicator on the payslip and ask payroll if the label is unclear.
What if I already used it twice?
Correct the payroll settings and assess the likely annual shortfall. The income-tax return reconciles the final amount.
Will one credit setting guarantee no extra tax?
No. Combined earnings can change the applicable tax and credit amounts, even with only one employer applying the credit.
Sources
Last verified: 4 October 2026. Sources are in Dutch or English.