Tax return in Basel-Stadt made simple

Private individuals:
The regular deadline for submitting the tax return is March 31.

Companies:
For companies, the deadline is usually June 30.

Extension: Extensions can easily be requested online – generally until December 31 (for both private individuals and companies).
Note: Depending on the canton, fees may be charged for requesting an extension.

If the tax return is submitted late without an extension, reminder fees or fines may apply.

In Basel-Stadt, the submission of the tax return is preferably done digitally:

• Digital with BalTax Online: The official cantonal portal allows you to easily complete and directly submit your tax return electronically. Supporting documents can also be uploaded digitally. The platform automatically checks entries for completeness and plausibility, and no signature is required.
• By post as an alternative: If you prefer the traditional way, you can still print out the return, sign it, and send it by post.

Note: Digital submission with BalTax reduces follow-up questions and is legally fully equivalent to paper-based submission.

In the canton of Basel-Stadt, the following tax specifics apply:

• Moderate income tax rate: In Basel-Stadt, the basic tax rate for individuals is around 21.75% on taxable income up to CHF 206,500. Above this threshold, a progressive tariff applies. Married couples are subject to comparable, slightly adjusted rates — ensuring transparency and fairness.
• Uniform tax rate for city and canton: As a city canton, Basel-Stadt levies a uniform tax rate of around 50% that applies to all residents. There are no different municipal tax rates, which simplifies calculations and makes financial planning more straightforward.
• Flexible handling of jointly owned property: Income and maintenance costs from jointly used real estate are allocated according to ownership shares. This regulation creates tax clarity — particularly for cohabiting couples and ownership communities.
• Extended deductions for families and work-related expenses: Families benefit from generous deductions, such as up to CHF 25,600 for childcare costs and up to CHF 18,900 for education and training expenses. Work-related costs can also be comprehensively deducted.
• Progressive wealth tax with clear tariffs: The wealth tax in Basel-Stadt is progressive and ranges between 4.5 and 9 per mille, depending on the level of assets. Taxable is the net wealth, minus debts and considering certain exceptions such as tied pension assets.

Especially in an urban environment like Basel-Stadt, there are often specific tax situations. We support you with:

• Cross-border commuter regulations (France, Germany)
• Rental income, property sales, or changes in ownership
• Withholding tax and voluntary assessment (SOTA)
• Self-employment or secondary income
• Capital benefits from pension funds or life insurance policies
• Foreign income or digital forms of employment

Our tax specialists analyze your individual situation and ensure a complete, legally compliant, and tax-optimized declaration.