Tax deadlines in Solothurn
When are tax returns due in the Canton of Solothurn? On this page, you’ll discover everything about deadlines, how to extend them, and what happens if you miss them.
Stay on top of tax deadlines with professional guidance and reliable support.
In the Canton of Solothurn, we handle your tax return from start to finish: from completing the forms and managing deadline extensions to optimizing your deductions. Simple, reliable, and transparent.
Ordinary tax deadlines
In the Canton of Solothurn, the following submission deadlines apply:
- Private individuals: by March 31
- Companies: by June 30
These deadlines always refer to the tax year that ended in the previous year.
Request deadline extension & maximum deadlines
If you cannot submit your tax return in the Canton of Solothurn within the ordinary deadline, you can request an extension from the tax office. The application can be submitted either online or in writing — for both private individuals and companies. The maximum extension applies until:
- Private individuals: November 30
- Companies: November 30
Note: Depending on the canton, fees may be charged for an extension.
Good to know: If you book through Taxea.ch, the deadline extension is automatically included. You don’t have to worry about a thing — we’ll take care of it for you.
What happens if you file your tax return late?
If the tax return in the Canton of Solothurn is submitted late without an extension, the following consequences may occur:
- The tax office issues a reminder
- Reminder fees or fines may be imposed
- In certain cases, a discretionary tax assessment may be carried out
To avoid additional costs and hassle, it is advisable to meet the deadlines or use our service.
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 Solothurn
Below you will find answers to the most important questions about tax deadlines in the Canton of Solothurn.
What are the deadlines for filing a tax return in the Canton of Solothurn?
In the Canton of Solothurn, tax returns are due by March 31 for private individuals and June 30 for companies. If needed, you can request an extension.
How do I request an extension of the deadline?
Whether online or in writing, the application goes to the Solothurn tax office. With Taxea.ch, you don’t need to worry about it — we’ll manage the extension for you automatically.
Do I have to file a tax return in Solothurn every year?
Yes, all taxable persons and companies in the Canton of Solothurn must file a tax return annually.
What happens if I file my tax return late or not at all?
The tax office can send reminders, collect 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, you can still request an extension even if you move away — just make sure to let the tax office know on time.
