The large commuter canton located between Zurich, Basel, and Bern—we’re familiar with Aargau’s unique tax rules and its 197 different municipal tax rates. Fixed price starting at CHF 35, response within 24 hours.
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The canton of Aargau is ideally situated in terms of transportation between the economic hubs of Zurich, Basel, and Bern. With approximately 741,000 residents and 197 municipalities, it is one of Switzerland’s largest cantons. The range of tax rates is enormous: Oberwil-Lieli (48%) and Bergdietikon (55%) contrast with Mellikon (127%). The cantonal tax rate is 111%. Aargau is a classic commuter canton—hundreds of thousands of workers commute daily to the surrounding major urban centers. Starting in 2026, the eTAX AARGAU web application will replace the existing EasyTax desktop software.
eTAX AARGAU is the Canton of Aargau’s web application for electronic tax returns. You can fill out your tax return directly in your browser and submit it electronically. Registration is done through AGOV. However, if you want to ensure that all deductions are claimed correctly and in full, our tax advisors will handle the entire process for you. We work with all standard cantonal systems and are familiar with the specifics of the Aargau tax forms.
In our practice, we see the same mistakes time and again in Aargau tax returns: Commuters to Zurich, Basel, or Bern do not fully utilize the cantonal commuter deduction, which is capped at CHF 7,000—and with such long commutes, that limit is quickly reached. The sheer number of 197 municipalities means that taxpayers who move within the canton often fail to account for differences in tax rates. The switch from EasyTax to the new eTAX AARGAU web application (available via AGOV starting in 2026) is causing confusion. And families forget the CHF 10,000 child care deduction, which provides a significant tax benefit, especially for families with two working parents.
In the canton of Aargau, the cantonal tax rate is 111%. When combined with the municipal tax rate, this results in the total tax burden. The differences between municipalities are considerable: While Oberwil-Lieli has the lowest tax rate at 48%, taxpayers in Mellikon pay 127%. Anyone planning to move should be sure to compare tax rates.
The canton of Aargau, with its 197 municipalities, offers a wide range of tax rates. The municipalities with the lowest tax rates, such as Oberwil-Lieli (48%) and Bergdietikon (55%), are located in the Limmat Valley near the Zurich border. Municipalities in urban agglomerations, such as Baden (89%) and Aarau (96%), offer moderate tax rates and good infrastructure. The more expensive municipalities tend to be found in rural areas. For commuters to Zurich, the municipalities in the Baden district are particularly attractive—short commutes and moderate tax rates.
If you know all the allowable deductions and claim them correctly, you can significantly reduce your tax burden in the canton of Aargau. Our tax advisors systematically review each individual deduction item to determine what applies to your situation. Here is an overview of the most important categories:
Commuting expenses, meals, work clothing, and continuing education. In the canton of Aargau, commuting expenses between home and work are deductible up to a maximum of CHF 7,000 per year (cantonal rule). Public transportation costs are generally recognized. Car expenses are deductible only if you can prove they are necessary. Tip: We’ll check whether you can provide proof in your case and help you claim the maximum deduction.
Health insurance premiums, accident insurance, and other personal insurance premiums are tax-deductible in the canton of Aargau up to a maximum of CHF 3,600 (for individuals) or CHF 7,200 (for married couples). Medical and accident expenses that exceed the deductible may also be claimed.
Contributions to Pillar 3a are tax-deductible throughout Switzerland. In 2025, the following maximum amounts will apply: CHF 7,258 for employees with a pension fund. Contributions to a pension fund (Pillar 2) are also fully tax-deductible and directly reduce your tax burden in the canton of Aargau.
In the canton of Aargau, third-party childcare costs of up to CHF 10,000 per child per year may be claimed, provided they are necessary (e.g., when both parents are employed). In addition, the general child deduction and the education deduction for children in school apply.
In the canton of Aargau, expenses for job-related continuing education and retraining are tax-deductible up to CHF 12,000 per year. This includes course fees, instructional materials, exam fees, and travel expenses to the course location.
Voluntary contributions to tax-exempt institutions in the canton of Aargau are deductible up to 20% of net income. These include donations to nonprofit organizations, associations, and political parties.
The complete list of all deductions in the canton of Aargau includes additional items such as interest on debt, child support payments, real estate expenses, and securities management fees. Our tax advisors are familiar with all available deductions and review your tax return item by item. This ensures that you don’t miss out on any tax savings. The Aargau Tax Office’s 2025 cantonal guidelines contain all the details and can be viewed at the Cantonal Tax Office.
Regular Filing Deadline
March 31, 2026
Extension of the Deadline
Available through November 30 at the latest—online via the canton’s Smart Service Portal
Electronic Tax Return
eTAX AARGAU (web application; can be used directly in a browser (will replace EasyTax starting in 2026))
Fines for Delays
After a warning, administrative fines and a discretionary assessment may be imposed
The deadline for filing your tax return in the canton of Aargau is March 31. If you need more time, you can request an extension. In the canton of Aargau, the process is straightforward: Scan the QR code on your tax return and submit your request online via the cantonal tax portal or by mail. Our service: If you hire us, we’ll take care of the deadline extension for free. It’s included in the package price.
Extensions are included free of charge in the package price at steuermacher.ch.
In the canton of Aargau, many foreign workers with a B or L residence permit are subject to withholding tax. As a commuter canton between Zurich, Basel, and Bern, many international professionals work in the canton or commute from here to the major urban centers. Under certain conditions, it may be worthwhile to file a retroactive regular tax assessment (NOV), which allows for additional deductions to be claimed.
Foreign employees without a C residence permit in the canton of Aargau are subject to withholding tax. This applies to individuals with a B residence permit (resident), an L permit (short-term resident), and cross-border commuters who return to their home country daily.
In the canton of Aargau, the NOV is granted automatically for those with a gross annual income of CHF 120,000 or more. If your income is lower than that, you can apply for the NOV voluntarily. Deadline: by March 31 of the following year. The NOV allows you to claim additional deductions, such as Pillar 3a, professional expenses, or interest on debt.
We’ll determine whether filing a NOV is worthwhile for you, submit the application by the deadline, and prepare your complete tax return, including all deductions. Many people subject to withholding tax receive a refund through the NOV.
Property owners in the canton of Aargau must report the imputed rental value as income for tax purposes. This is generally set at 70% of the market rental value. In return, mortgage interest, maintenance costs, and administrative expenses can be deducted on the tax return. Those who do not occupy the entire property themselves can claim a 30% underutilization deduction in the canton of Aargau.
Since 2016, the canton of Aargau has had a hardship provision for AHV pensioners: If the imputed rental value represents a disproportionate financial burden, a reduction may be requested. In addition, the so-called “preferential rent” rule was abolished in 2024, leading to changes when renting to related parties.
Additional fee: CHF 65 per property
The tax rate varies considerably from municipality to municipality in the canton of Aargau. Here you will find a selection of the most important municipalities. The cantonal tax rate is a uniform 111%. The total tax rate is the sum of the cantonal, municipal, and church tax rates.
| Community | Tax Rate |
|---|---|
| Aarau | 96 % |
| Swimming | 89 % |
| Wettingen | 95 % |
| Brugg | 97 % |
| Lenzburg | 95 % |
| Rheinfelden | 110 % |
| Zofingen | 103 % |
| Oberwil-Lieli | 48 % |
| Bergdietikon | 55 % |
| Mellikon | 127 % |
As of the 2025 tax year. All information is provided without guarantee. For the most up-to-date tax rates, visit ag.ch.
Depending on where you live, your tax burden can vary by several thousand francs. This makes it all the more important to file a tax return that takes full advantage of all eligible deductions. Our tax advisors are familiar with the tax situation in every municipality in Aargau.
The standard filing deadline in the canton of Aargau is March 31. If you need more time, you can request an extension—up to November 30 at the latest. If you hire us, we’ll handle the extension for you at no charge.
Students pay starting at CHF 35, individuals starting at CHF 99, and married couples starting at CHF 149. These are transparent, fixed prices. Securities, investment income, and deadline extensions are included in the package price. You can find all prices on our pricing page.
The most important deductions in the canton of Aargau are: occupational expenses and the commuter deduction (cantonal maximum of CHF 7,000; car expenses only if necessity is proven), insurance premiums up to CHF 3,600 or CHF 7,200 for married couples, Pillar 3a contributions, continuing education expenses up to CHF 12,000, child care expenses up to CHF 10,000 per child, and charitable donations up to 20% of net income. Our tax advisors are familiar with all cantonal specifics and systematically review each item.
eTAX AARGAU is the Canton of Aargau’s web application for filing tax returns electronically. You can fill out your tax return directly in your browser and submit it electronically. You log in via AGOV. Since 2026, this web application has replaced the previous desktop software, EasyTax.
In many cases, yes. The NOV allows you to claim additional deductions that are not taken into account under withholding tax—for example, Pillar 3a contributions, professional expenses, or interest on debt. The NOV is processed automatically for gross annual incomes of CHF 120,000 or more. For incomes below that amount, you can apply for it voluntarily. Deadline: March 31 of the following year.
The tax rate varies by municipality in the canton of Aargau. The cantonal tax rate is a uniform 111%. The municipality with the lowest tax rate is Oberwil-Lieli at 48%, while the highest is Mellikon at 127%. You can find a complete overview of all 197 municipalities further up on this page or directly from the canton of Aargau.
No, electronic filing via eTAX AARGAU is optional. You can continue to file your tax return on paper. We recommend the electronic option because it is processed more quickly.
Yes. We accurately calculate the imputed rental value, optimize property costs, and review the underutilization deduction as well as the hardship provision for individuals of AHV retirement age. This additional service costs CHF 65 per property.
Your personal tax advisor will contact you within 24 hours. The inquiry is free of charge and non-binding. We will not begin processing your request until you give your approval.
Yes. Please specify which tax years are missing in your request. We will prepare a customized quote for you for the follow-up work.
After the deadline, you will receive a reminder. If you fail to file, the tax office may issue a discretionary assessment, which is generally less favorable. You may also face administrative fines. Please contact us in a timely manner so that we can request an extension of the deadline.
Yes, absolutely. The inquiry and initial assessment are free of charge. Fees are only incurred once your tax return is completed, and payment is conveniently due within 14 days of the invoice date. You can decide at any time whether you’d like to use the service.
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