Aargau Corporate & Capital Tax Calculator
Last updated: 14 Dec 2025
Aargau Corporate & Capital Tax Calculator (Approximate)
Quick, approximate modelling of Aargau company tax: combine cantonal/communal profit tax, capital tax and Swiss federal corporate income tax on a given level of taxable profit and equity. Designed for educational planning — not as an official Aargau tax tool.
Aargau Tax Calculator (Approximate)
This calculator assumes a standard Aargau corporate setup without special regimes (no patent box, R&D super-deduction, notional interest deduction, participation relief modelling, restructuring effects, etc.). Minimum tax and detailed commune nuances are not modelled.
Results (Illustrative)
Approximate effective rate on profit: –
Figures are rounded and for illustration only. Minimum tax, special statuses and detailed intercantonal allocation are not modelled.
Assumptions & Methodology
| Parameter | Value used | Comment |
|---|---|---|
| Simple cantonal profit tax rate (Kapitalgesellschaften / Genossenschaften) |
2025–2024: 5.50% of taxable net profit 2023: 5.50% up to CHF 250,000; 6.50% above |
Applied as the “einfache Kantonssteuer” for profit tax, then multiplied by the Steuerfuss (factor). |
| Steuerfuss total for juristic persons (2025) | 167% (factor 1.67) | Sum of ordinary cantonal tax, surcharges and municipal surcharge (as published by Canton Aargau). |
| Capital tax rate (Kapitalgesellschaften / Genossenschaften) | 0.75‰ of taxable equity | Applied to the equity base, then multiplied by the same Steuerfuss (factor). |
| Federal corporate income tax | ~7.83% of profit before tax | Derived from the official 8.5% rate on profit after tax; modelled here as an effective percentage of profit before tax. |
| Location within Aargau | Unified factor | The calculator uses a unified factor for simplicity; commune-by-commune effects are not implemented (an “Aarau” selector only tweaks results slightly for illustration). |
| Special regimes | Not modelled | Patent box, R&D deductions, notional interest deduction, participation relief interactions and other instruments are excluded to keep the calculator transparent. |
This is not an official Aargau calculator. It is a deliberately simple approximation for planning and education. For transactions, group structuring or filings, please rely on official cantonal tools, detailed models and professional advice.
Worked Example
Assume a standard Aargau company with:
- Taxable profit before tax: CHF 1,000,000;
- Taxable equity (capital tax base): CHF 2,000,000;
- No special regimes or loss carryforwards.
Under the calculator assumptions, very roughly:
- Cantonal/communal profit tax ≈ CHF 91,850
- Capital tax ≈ CHF 2,505
- Federal corporate income tax ≈ CHF 78,300
- Total tax ≈ CHF 172,655
- Effective rate on profit ≈ 17.3%
These figures are rounded and illustrative. A real-world assessment would also consider participation relief, loss carryforwards, minimum tax, and any intercantonal or international allocation.
Official Tools & When to Get Advice
| Tool / resource | Use case | Comment |
|---|---|---|
| Aargau official tax calculation (juristic persons) | Estimate cantonal/communal and federal tax using official parameters by year. | Use the canton’s official pages and simulators for more faithful figures: Aargau: Steuerberechnung/Tarife & Steuerfüsse. |
| Swiss federal “Steuerrechner” (ESTV/AFC) | Benchmark corporate tax burdens across cantons. | Useful for comparisons and sanity checks. |
| Aargau Tax Service (TaxRep) | Structuring, rulings and transaction support for Aargau corporate & capital tax. | See the Aargau Tax Service and Aargau Business Tax Service. |
FAQs
How accurate is this Aargau calculator?
It is intentionally simplified. It applies the published Aargau “simple” profit/capital tax rates and multiplies them by the published Steuerfuss, then adds federal tax. It does not model minimum tax, detailed communal nuances, loss carryforwards, allocation between cantons or special regimes, so it should not be used as the sole basis for decisions.
Can I use this output for my financial statements?
No. Financial statements, budgets and tax provisions should be based on more detailed models or official calculators aligned with the latest law and practice. This tool is for education and high-level planning only.
Does this calculator handle intercantonal or international allocation?
No. It assumes a company taxed entirely in Aargau. If you have permanent establishments, properties or functions in other cantons or countries, you will need an allocation model and, often, local advice.
Can Sesch TaxRep help refine these numbers?
Yes. We can build a company-specific Aargau tax model, prepare or review corporate tax returns, and assist with rulings and structuring. See the Aargau service links above or use the general contact form on taxrep.us.