Marginal and Average Tax Rates in the Canton of Aargau (Charts 2026)

Knowing your personal marginal tax rate is of great importance for numerous financial decisions. It helps answer questions such as:

• Is it worthwhile for me to contribute to pillar 3a, and how high will the tax savings be in the current tax period?
• Is it worthwhile to increase my workload, and what proportion of the additional income will actually be taxed?

The individual marginal tax rate varies depending on place of residence, marital status, number of children, and other influencing factors. For sound tax planning, it is particularly helpful not only to look at isolated values, but to understand the progression of marginal and average tax rates as a function of taxable income. Point estimates from individual tax calculators are often insufficient for this purpose.

In previous articles, we presented corresponding charts for ten selected municipalities in the cantons of Zug. In the following, we present the charts for the Canton of Aargau.

There are significant differences between married and unmarried individuals, both in the level and structure of taxation. For this reason, the respective charts are shown separately.

The cantonal tax rate for 2026 in the Canton of Aargau is uniformly 100%. Municipal tax rates for 2026, however, vary significantly, ranging from 48% (Oberwil-Lieli) to 127% (Ammerswil).

Do you have any comments regarding the charts or your tax municipality? Do you find the visualizations helpful, or is there any information you feel is missing? We kindly ask you to refrain from sending direct email inquiries about this article and instead use the comment function. All feedback will be read by us and, where possible, also responded to.

In a next step, our tax team will prepare similar charts for other cantons such as Basel-Stadt and Bern.