Contact

tax-calculator.nl is run by one person, so every message goes to the same place and gets read. Pick whichever route below matches what you need, since some of them get you an answer faster than email does.

Support email

For account, billing, subscription, or product questions, email contact@tax-calculator.nl. If your question is about a payment, include the email address you paid with and the approximate date, since that is what the payment records are searchable by.

Expect a reply within a couple of working days. This is a one-person project rather than a support desk, so there is no phone line and no live chat.

A calculation looks wrong

Use the report button on the calculator dashboard rather than describing the problem in an email. It attaches your current inputs and the computed result, which is what makes a discrepancy reproducible. Without those, a report usually cannot be acted on, because Dutch payroll outcomes depend on the exact combination of pension, overtime, lump sums, and ruling status that produced them.

Worth checking first: the tax year selected on the page, and whether your payslip includes elements the calculator was not told about. Most reported mismatches turn out to be one of those two.

Billing, refunds, and cancellation

Payments are processed by Lemon Squeezy, which issues receipts and handles VAT. You can cancel at any time from your account settings, and access continues to the end of the billing period already paid for. See the Refund Policy for what is and is not refundable.

Privacy and data requests

To access or delete your data, use account and data deletion, or email the address above. What is collected and why is set out in the Privacy Policy.

Press, partnerships, and API access

Same email address. For payroll teams needing bulk calculations or API access, mention the rough number of employees involved so the reply can be useful the first time.

What this site cannot do for you

tax-calculator.nl is an independent tool and is not affiliated with the Belastingdienst or any government body. Its figures are estimates for planning, not tax advice, and no one here can file a return on your behalf, represent you to the Belastingdienst, or tell you what to do in your specific situation. For a binding answer, speak to a qualified Dutch tax adviser or contact the Belastingdienst directly. More on how the site works and where its numbers come from is on the about page.