Self-employed / Aargau

Self-employed in Aargau

Tax year 2026 · Data updated 14 Nov 2026 · Source: ESTV, BSV

Of CHF 100’000 profit, a single person without children in Aarau has CHF 6’323 left a month. Tax and social contributions take 24.1% of the profit, which puts Aarau 10th among the 26 cantonal capitals.

Profit and what's left in Aarau

Profit per yearSingleMarried, 2 children
CHF 50’0003’47816.5%3’7759.4%
CHF 80’0005’19022.2%5’73614.0%
CHF 100’0006’32324.1%7’04715.4%
CHF 150’0009’01927.8%10’04119.7%
CHF 200’00011’63130.2%12’82823.0%
CHF 300’00016’59433.6%17’91828.3%

The table shows what is left per month in Aarau and, below it, the share of profit that goes to tax and social contributions. We assume no church tax and no pillar 3a payment, and the children are 6 and 10.

Income tax in Aargau

  • The canton's multiplier is 103% of the simple tax. Communes add between 48% and 127%, and Aarau adds 96%.
  • Married couples and single parents pay the rate that applies to their income divided by 2.
  • Two children lower the income tax of a married couple with CHF 100’000 profit in Aarau by CHF 3’488 a year.
  • With CHF 100’000 profit in Aarau, church members pay another CHF 1’043 (Roman Catholic) or CHF 823 (Protestant) a year.
  • With CHF 100’000 profit, paying the pillar 3a maximum of CHF 17’710 saves CHF 4’079 of tax in Aarau.
  • Aargau has a deduction for small earners. It is CHF 12’000 when the income after the other deductions is under CHF 15’000 and falls in steps to CHF 1’000 just under CHF 35’000.
  • The child deduction depends on age: CHF 9’300 up to 13 and CHF 10’300 from 14 to 17.

Cheapest and most expensive communes in Aargau

With CHF 100’000 profit, a single person pays CHF 8’289 of cantonal and communal tax a year in Oberwil-Lieli and CHF 12’625 in Mellikon. The difference is CHF 4’336 a year. Aarau is number 34 of 196 communes.

CommuneMultiplierTax per year
Oberwil-Lieli48%8’289
Geltwil50%8’399
Kaiseraugst50%8’399
Meisterschwanden60%8’948
Seengen72%9’606
186 more communes
Wölflinswil125%12’516
Hallwil126%12’570
Oberhof126%12’570
Ammerswil127%12’625
Mellikon127%12’625

Social contributions in Aargau

  • AHV / IV / EO10% from CHF 60’500
  • Family allowance fund1.45%
  • Contributions on CHF 100’000 profitCHF 11’450

The family allowance rate in Aargau is the 12th lowest of the 26 cantons. AHV, IV and EO cost the same all over Switzerland, and the sliding scale for lower incomes applies in Aargau too.

Aarau compared with other capitals

In Schaffhausen you keep CHF 58 more a month, in Chur CHF 34 less. See all 26 cantons in the calculator. For employees: net salary in Aargau.

All 196 communes of Aargau

The list gives the cantonal and communal tax per year for a single person with CHF 100’000 profit, without church tax, from Oberwil-Lieli to Mellikon. Federal tax of CHF 1’747 comes on top in every commune.

Show the list of 196 communes
  1. Oberwil-Lieli8’289
  2. Geltwil8’399
  3. Kaiseraugst8’399
  4. Meisterschwanden8’948
  5. Seengen9’606
  6. Oberlunkhofen9’716
  7. Unterlunkhofen9’716
  8. Widen9’771
  9. Zufikon9’991
  10. Sisseln10’045
  11. Habsburg10’155
  12. Arni (AG)10’210
  13. Jonen10’210
  14. Bergdietikon10’265
  15. Oberrohrdorf10’320
  16. Staufen10’430
  17. Villigen10’430
  18. Stein (AG)10’485
  19. Baden10’539
  20. Bellikon10’539
  21. Berikon10’539
  22. Erlinsbach (AG)10’539
  23. Rheinfelden10’594
  24. Dottikon10’704
  25. Ennetbaden10’704
  26. Olsberg10’704
  27. Remetschwil10’704
  28. Auenstein10’759
  29. Möriken-Wildegg10’814
  30. Birrwil10’869
  31. Magden10’869
  32. Wallbach10’869
  33. Wettingen10’869
  34. Aarau10’924
  35. Bözberg10’924
  36. Büttikon10’924
  37. Merenschwand10’924
  38. Brugg10’979
  39. Gipf-Oberfrick10’979
  40. Kallern10’979
  41. Niederrohrdorf10’979
  42. Würenlos10’979
  43. Beinwil (Freiamt)11’033
  44. Birmenstorf (AG)11’033
  45. Dintikon11’033
  46. Islisberg11’033
  47. Remigen11’033
  48. Sins11’033
  49. Beinwil am See11’088
  50. Biberstein11’088
  51. Rottenschwil11’088
  52. Rudolfstetten-Friedlisberg11’088
  53. Rupperswil11’088
  54. Schafisheim11’088
  55. Zofingen11’088
  56. Hirschthal11’143
  57. Spreitenbach11’143
  58. Würenlingen11’143
  59. Boswil11’198
  60. Bettwil11’253
  61. Buttwil11’253
  62. Frick11’253
  63. Hunzenschwil11’253
  64. Kaisten11’253
  65. Leibstadt11’253
  66. Villmergen11’253
  67. Auw11’308
  68. Lengnau (AG)11’308
  69. Niederwil (AG)11’308
  70. Schöftland11’308
  71. Strengelbach11’308
  72. Aristau11’363
  73. Bremgarten (AG)11’363
  74. Dietwil11’363
  75. Künten11’363
  76. Othmarsingen11’363
  77. Boniswil11’418
  78. Brunegg11’418
  79. Egliswil11’418
  80. Gebenstorf11’418
  81. Killwangen11’418
  82. Küttigen11’418
  83. Lenzburg11’418
  84. Sarmenstorf11’418
  85. Stetten (AG)11’418
  86. Untersiggenthal11’418
  87. Veltheim (AG)11’418
  88. Eggenwil11’473
  89. Holderbank (AG)11’473
  90. Holziken11’473
  91. Muri (AG)11’473
  92. Uezwil11’473
  93. Waltenschwil11’473
  94. Böttstein11’527
  95. Döttingen11’527
  96. Leuggern11’527
  97. Tegerfelden11’527
  98. Laufenburg11’582
  99. Seon11’582
  100. Birrhard11’637
  101. Fischbach-Göslikon11’637
  102. Fislisbach11’637
  103. Mettauertal11’637
  104. Mülligen11’637
  105. Thalheim (AG)11’637
  106. Wiliberg11’637
  107. Bünzen11’692
  108. Hausen (AG)11’692
  109. Herznach-Ueken11’692
  110. Lupfig11’692
  111. Mellingen11’692
  112. Obersiggenthal11’692
  113. Rothrist11’692
  114. Schinznach11’692
  115. Schupfart11’692
  116. Eiken11’747
  117. Endingen11’747
  118. Gränichen11’747
  119. Möhlin11’802
  120. Muhen11’802
  121. Neuenhof11’802
  122. Suhr11’802
  123. Zeiningen11’802
  124. Abtwil11’857
  125. Besenbüren11’857
  126. Ehrendingen11’857
  127. Mägenwil11’857
  128. Münchwilen (AG)11’857
  129. Oberentfelden11’857
  130. Oftringen11’857
  131. Unterentfelden11’857
  132. Böztal11’912
  133. Brittnau11’912
  134. Freienwil11’912
  135. Hägglingen11’912
  136. Klingnau11’912
  137. Oeschgen11’912
  138. Zeihen11’912
  139. Fisibach11’967
  140. Mönthal11’967
  141. Reinach (AG)11’967
  142. Safenwil11’967
  143. Schneisingen11’967
  144. Unterkulm11’967
  145. Windisch11’967
  146. Zurzach11’967
  147. Zuzgen11’967
  148. Aarburg12’022
  149. Mumpf12’022
  150. Wohlen (AG)12’022
  151. Wohlenschwil12’022
  152. Birr12’076
  153. Densbüren12’076
  154. Gontenschwil12’076
  155. Mandach12’076
  156. Mühlau12’076
  157. Niederlenz12’076
  158. Buchs (AG)12’131
  159. Dürrenäsch12’131
  160. Fahrwangen12’131
  161. Koblenz12’131
  162. Menziken12’131
  163. Murgenthal12’131
  164. Vordemwald12’131
  165. Wegenstetten12’131
  166. Zetzwil12’131
  167. Bottenwil12’186
  168. Kölliken12’186
  169. Oberkulm12’186
  170. Oberrüti12’186
  171. Staffelbach12’186
  172. Wittnau12’186
  173. Gansingen12’241
  174. Hellikon12’241
  175. Schlossrued12’241
  176. Schmiedrued12’241
  177. Leutwil12’296
  178. Siglistorf12’296
  179. Full-Reuenthal12’351
  180. Leimbach (AG)12’351
  181. Obermumpf12’351
  182. Reitnau12’351
  183. Riniken12’351
  184. Teufenthal (AG)12’351
  185. Kirchleerau12’406
  186. Moosleerau12’406
  187. Rüfenach12’406
  188. Schwaderloch12’406
  189. Uerkheim12’406
  190. Hendschiken12’516
  191. Tägerig12’516
  192. Wölflinswil12’516
  193. Hallwil12’570
  194. Oberhof12’570
  195. Ammerswil12’625
  196. Mellikon12’625

Other cantons: self-employed in all 26 cantons.

Calculate your case in Aargau

CHF

Income less business costs, before your own AHV contributions.

Aarau · Aargau

Marital status
Children under 18
0
Pillar 3a payment
More options
CHF

Only if you joined a pension fund voluntarily. It lowers the pillar 3a limit to CHF 7’258.

CHF

The compensation office deducts 1% interest on it before it charges contributions (rate for 2025, the latest published).

Between 0 and 5% of the AHV contribution. Your office's invoice shows it.

CHF

Leave empty to use the assumption of the federal tax calculator: CHF 4’560 per adult and CHF 1’200 per child.

Left per month

CHF6’323
Per year CHF 75’879Tax and contributions 24.1%
25%

Set aside 25% of your profit for tax and social contributions. Tax and AHV invoices arrive months later, so the money should be there when they do.

A pillar 3a payment of CHF 17’710, the most you can deduct, would lower your tax by CHF 4’079.

Where your profit goes

  • Left for youAfter income tax and social contributions75’87975.9%
  • Cantonal and communal taxAarau, Aargau10’92410.9%
  • Federal taxDirect federal tax, the same everywhere in Switzerland1’7471.7%
  • AHV / IV / EOOld age, disability and income loss, 10%10’00010.0%
  • Family allowance fundCantonal fund, 1.45% of income up to CHF 148’2001’4501.5%
  • Profit per year100’000100%

Of the next CHF 1’000 of profit, CHF 659 is left for you.

Income tax in detail

CantonFederal
Profit after social contributions88’55088’550
Insurance premiums-3’800-2’700
Taxable income84’75085’850
Federal tax1’747
Cantonal tax, multiplier 103%5’654
Communal tax, multiplier 96%5’270
Income tax per year12’671

The family allowance rate is the one of the cantonal fund. If you belong to a professional association's fund, your rate may differ.

Same profit in every canton

Left per month if you live in the cantonal capital.

  • 1Zug6’881
  • 2Schwyz6’659
  • 3Appenzell Innerrhoden6’468
  • 4Obwalden6’427
  • 5Uri6’423
  • 6Zurich6’412
  • 7Lucerne6’410
  • 10Aargau6’323

This is an estimate and doesn't replace tax advice. It covers only your income from self-employment. Other income, wealth tax and deductions that aren't listed above are left out. Your tax office and your compensation office set the final amounts.

Left per monthCHF6’323