Tax deadlines in Aargau
What are the tax return deadlines in the Canton of Aargau? On this page, you can find all relevant information on submission deadlines, deadline extensions, and the potential consequences of late filing.
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Ordinary tax deadlines
In the Canton of Aargau, the following tax filing deadlines apply:
- Private individuals: by March 31
- Companies: by October 31
The deadlines refer to the tax year completed in the previous year.
Request deadline extension & maximum deadlines
If you cannot submit your tax return by the regular deadline in the Canton of Aargau, you can request a deadline extension. The application can be submitted online to the Aargau tax office or in writing – applicable for both private individuals and companies. The maximum extension applies until:
- Private individuals: extension is determined individually
- Companies: December 31
Note: Depending on the canton, fees may be charged for deadline extensions.
Good to know: When ordering through Taxea.ch, the deadline extension is already included. You don’t need to do anything – we take care of it for you.
What happens if you file your tax return late?
If the tax return in the Canton of Aargau is submitted late without a deadline extension, the following consequences may occur:
- The tax office issues a reminder
- Reminder fees or fines may be imposed
- In certain cases, a discretionary assessment may be carried out
To avoid additional costs and complications, it is recommended to submit your tax return on time or use the service provided by Taxea.ch.
Different deadlines for special cases
Depending on your situation, different deadlines and specific tax rules may apply. For example, this may be the case in situations such as:
- Moving to Switzerland from abroad
- Moving from Switzerland to another country
- Death during the tax year
- Starting or ending self-employment
- Establishing, restructuring, or liquidating a company
In such cases, it is advisable to clarify with the relevant tax authority directly or seek support from a tax specialist to ensure compliance with deadlines and obligations.
Frequently asked questions about tax deadlines in Aargau
Below you will find answers to frequently asked questions about tax deadlines in the Canton of Aargau.
What are the deadlines for filing a tax return in the Canton of Aargau?
Tax returns must be filed by March 31 for private individuals and by June 30 for companies. You can request a deadline extension if needed.
How do I request an extension of the deadline?
This can be done online through the Canton of Aargau tax office or in paper form. When you order via Taxea.ch, we automatically handle the deadline extension for you.
Do I have to file a tax return in Aargau every year?
Yes, anyone who is taxable in the Canton of Aargau must file a tax return annually — regardless of income or wealth.
What happens if I file my tax return late or not at all?
The tax office can send reminders, impose reminder fees or fines and, in certain cases, carry out a discretionary assessment.
Can I also apply for an extension of the deadline if I move away?
Yes, an extension of the deadline is always possible, even if you move away. However, the tax office must be informed in due time.
