If the district court has dismissed your tax appeal, an appeal to the Court of Appeal may be the next step. Within the limits of the proceedings, that court can assess both facts and legal questions. This differs from cassation before the Supreme Court. First establish which remedy is available against your judgment and when its deadline expires. A lawyer is not mandatory in these tax proceedings, but specialist help may be important for evidential problems, penalties or multiple tax years. For an initial assessment, explain what you believe the district court decided incorrectly and what change you seek.
Sources (4)
On this page
1. Check the judgment and the correct next step
Read the complete judgment, including the operative decision and information on remedies. Record the case number, assessments concerned and points on which you won or lost. Check whether it is an ordinary final judgment. A special disposal may require another next step, such as opposition. A letter to the inspector does not replace a notice of appeal to the Court of Appeal.
Distinguish your original tax dispute from your objections to the judgment. The district court may have rejected a deduction on its merits but also ruled on admissibility, evidence or a penalty. Give an adviser every component, including favourable decisions. This allows them to assess what interest in continuing the proceedings remains and whether the financial stake, implications as a precedent for other years and costs justify continuing.
2. Calculate six weeks from the correct notification
In principle, appeals in tax cases have a six-week deadline. It starts the day after the judgment is notified to the parties in the prescribed manner, usually by dispatch or digital availability. Do not use the hearing date, public pronouncement date or internet publication date without checking. Therefore also keep the covering letter, envelope and any digital notification with date details.
The notification day does not count; count 42 calendar days after it. Day 42 is the starting date for determining the end of the six weeks. Have an adviser check whether weekend and public holiday rules shift the final date and which filing rules apply. An Advocate General’s opinion from 2026 specifically discusses confusion over notification dates. It is advice, not a judgment determining your deadline. Plan well before the checked final date and have any doubt assessed immediately.
3. Direct your grounds at the decisive reasoning
Prepare an overview for each disputed issue with the district court’s reasoning, your counterargument and the result sought. Merely writing that the Tax Administration was unreasonable does not sufficiently show why the judgment should change. If, for example, you dispute the interpretation of a contract, identify the relevant provision and explain why you believe the court attributed an incorrect tax significance to it.
A tax lawyer can distinguish an incorrect rule of law, a disputed fact and a reasoning problem. This prevents you spending extensive attention on an irritation that is not decisive to the decision. Also discuss which positions you consciously choose not to pursue. Have your instructions specify the assessments, years, interest decisions and penalties being examined so that a partial engagement does not create an unintended gap.
4. Gather evidence while factual assessment remains possible
The Court of Appeal, unlike the Supreme Court in cassation, is a court of fact. Therefore investigate which relevant supporting evidence is missing. Examples include a contract version, a complete reconciliation between bank statements and records or a specific expert explanation. This does not mean every document submitted late will always be considered. Procedural fairness and the court’s directions remain important; therefore do not postpone evidence gathering until the hearing.
Number your attachments and refer from your argument to the correct page. State whether a document was already before the district court or is newly submitted, and explain what new documents demonstrate. Retain original files and do not alter historical records to make them fit your position better. A transparent correction with a traceable calculation is more useful than an overview of unclear origin.
5. File clearly and monitor all follow-up messages
The Dutch Judiciary states that tax appeals can be filed through Mijn Rechtspraak or by post to the competent Court of Appeal. Check the current instructions for your type of case and capacity. State who is appealing, which judgment is challenged, why you challenge it and what you request. Attach the judgment and check the signature and any authorisation. A saved draft is not yet a dispatched notice of appeal.
If full grounds cannot be ready on time, have an adviser assess how to appeal in time and request an opportunity to supplement. Record the original deadline and any deadline for remedying deficiencies separately. Download an acknowledgement, keep the exact version filed and agree who checks the portal. Arrange cover for holidays or illness; a forwarded email without clear responsibility is weak deadline management.
6. Discuss payment, costs and counter-responses separately
Do not assume an appeal suspends all payment obligations or automatically extends an earlier deferral. Compare the deferral decision with the litigation schedule and ask what action is needed for the disputed debt. If collection is imminent, also assess whether the tax proceedings, a deferral request or a separate urgent procedure can address the problem. The correct answer also depends on the specific decision.
Request an advance estimate for file examination, drafting, the hearing and any experts. A possible award of litigation costs does not automatically cover your actual lawyer’s bill. Also have an adviser assess what the opposing party’s defence or possible cross-appeal means for your position. Use favourable, partly favourable and unfavourable scenarios so that you can compare settlement with continuing proceedings without counting on victory.
7. Fictional example: district court relies on an incomplete hours overview
Suppose a business owner loses a tax case about a deduction because the district court finds the supporting evidence insufficient. After judgment, he discovers that a former adviser failed to forward calendar exports and engagement confirmations. This fictional example first requires checking the judgment, notification and deadline. Next, it is necessary to investigate whether those documents actually support the relevant activities and match the year and tax criterion.
A useful initial file contains the judgment, earlier pleadings, missing evidence and a short list of differences. Ask a tax lawyer which factual finding can be challenged, what further investigation costs and whether the expected improvement is proportionate to the stake. Also monitor payment and subsequent correspondence. Someone who first produces new calendars in cassation cannot thereby compel a fresh assessment of evidence by the Supreme Court.
Frequently asked questions
Is a lawyer mandatory for a tax appeal to the Court of Appeal?
No. You can conduct proceedings yourself or engage an authorised representative. Specialist tax litigation assistance may nevertheless be sensible for complex evidential or legal questions.
Does the deadline start on the day I read the judgment?
That is not a safe starting assumption. Have the prescribed notification, covering letter and digital availability assessed. Calculate the six weeks from the correct starting date and check the final day.
Can I use new evidence on appeal?
The Court of Appeal can assess facts, but timely filing and procedural fairness remain important. Discuss new documents early and explain why they are relevant.
Sources
These sources relate to this page. For a specific case, check current rules and your own documents.
- Rechtspraak — hoger beroep belastingzaak Accessed: 2026-10-23
- Parket Hoge Raad — conclusie ECLI:NL:PHR:2026:421 Accessed: 2026-10-23
- Rechtspraak — belastingprocedure Accessed: 2026-10-23
- Rechtspraak — ECLI:NL:RBZWB:2023:845 Accessed: 2026-10-23
Legal review
Not legally reviewed yetThis version has not been reviewed by a lawyer or legal professional. Checking sources or editing text is not legal approval.
Editorial team Tax law in the Netherlands
We connect explanations to sources and record targeted changes. Legal review is attributed only to the actual reviewed version, with a real reviewer, date and scope. Human legal review of these articles remains open.
Ricardo van der Spoel
Editorial responsibility · Editorial organisation and technology