The current answer
If you want the absolute lowest taxes in Canton Aargau right now, you have five equally good choices: Gränichen, Hausen, Hunzenschwil, Magden, and Mönthal. They are locked in a five-way tie for first place.
That tie isn't a rounding error. In our current dataset, all five municipalities deliver the exact same baseline burden: 9.5% for single_80k, 14.4% for couple_120k, and 13.0% for family_150k.
What the spread looks like
Aargau is not a canton of extremes. You don't have massive tax havens sitting right next to punishingly expensive towns. The current spread is surprisingly flat:
single_80k: from 9.5% to 10.1%couple_120k: from 14.4% to 15.3%family_150k: from 13.0% to 13.9%
This is why you shouldn't treat the ranking as an absolute mandate. The top five are undeniably the cheapest, but the gap between them and the middle of the pack is tiny. A slightly cheaper apartment or a ten-minute shorter commute will easily wipe out a 0.6% tax difference.
What this means in practice
If you just want a cheap starting point, any of the top five will do. Pick one, and then start looking at the actual town—the schools, the train connections, the local vibe—rather than staring at the tax multiplier.
The bottom half of the canton is only a few tenths of a point behind the leaders. Use this ranking to quickly build a shortlist, but don't pretend it makes the final decision for you.
When the official source takes over
We built PLZHub to help you rank, compare, and build that shortlist. But once you are ready to sign a lease, you need to leave the estimates behind. Take your exact salary and deductions, and run them through the official cantonal tax calculator to confirm the final math.
