Tax Penalties After Reassessment – When Do They Start and How to Reduce Them
Imagine receiving a letter from the tax office: not only are you asked to pay back taxes, but there’s also a hefty extra amount. Interest. Late payment penalties. Charges that have been quietly growing – even while you had no idea anything was wrong. Unfortunately, this is the reality of tax reassessment in the Czech Republic. And once the decision arrives, it may already be too late – unless you act fast.
Want to learn more about tax proceedings? We wrote about it here.
When the tax office reassesses your tax return, a penalty often follows. Queries like Czech tax penalty calculation, interest on unpaid tax, penalty waiver Czech Republic are very common. This article explains when penalties arise, how they are calculated – and whether they can be waived.
When Does the Penalty Start?
A tax penalty applies when a tax is not paid properly and on time – either voluntarily or following a reassessment. The crucial thing is that the interest is calculated retroactively. For example, if in 2025 you are reassessed for the year 2021, the penalty interest is calculated from the original due date (e.g., April 1, 2022), not the date of the reassessment decision.
How Are Penalties and Interest Calculated?
The penalty is based on a percentage of the unpaid tax:
0.05% per day of the outstanding tax
Calculated for a maximum period of 5 years
After 5 years, no further penalty interest accrues
In addition to penalties, the tax office may also charge statutory late-payment interest, which compensates the state for delayed funds.
Can the Tax Office Waive the Penalty?
Yes – under Czech law, you can apply for a waiver of tax-related charges, including penalties and interest. However, you must:
Apply without unnecessary delay
Provide serious reasons (e.g., health issues, social hardship, financial crisis)
Submit the request under Section 259 of Act No. 280/2009 Coll. (Tax Code)
The tax office will review your request on a case-by-case basis – usually without a detailed explanation in the decision.
Common Mistakes Taxpayers Make
Misunderstanding when interest starts accruing. Many believe it starts when they receive the decision. Wrong – it begins on the original due date.
Delaying their response. Every day adds to the amount owed.
Not applying for a waiver. Often because they assume it won’t be granted.
Lawyer’s Advice
From my experience: it’s not uncommon for penalties to reach 30–40% of the reassessed tax. Clients are shocked to find that a small accounting error results in tens of thousands in extra charges. Yet there are ways to stop or reduce these charges – sometimes even have them entirely waived. But only if you act quickly.
If you’ve received a tax reassessment decision, don’t wait. I offer a fixed-fee consultation to evaluate your options. If it’s worth pursuing, I’ll represent you before the tax authority. The only real mistake is doing nothing.
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Get in touch now. The sooner we act, the more we can save. I work online, respond quickly, and offer clear pricing. Send me a message – I might save you more than you expect.
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Tax Penalties After Reassessment – When Do They Start and How to Reduce Them
Print Imagine receiving a letter from the tax office: not only are you asked to pay back taxes, but there’s also a hefty extra amount.