Step 1: Pick one household and stick to it
A useful tax comparison starts with a single household scenario and doesn't change it. For a single person earning CHF 80,000, 8001 Zurich currently shows an effective tax rate of 10.1%. Meanwhile, 6300 Zug sits at 7.9%, and 1003 Lausanne comes in at 11.5%. That single data point is enough to build a reliable mental map: Zug is clearly lighter on taxes than Zurich, and Zurich is lighter than Lausanne for that exact scenario.
The biggest mistake people make is switching the scenario halfway through their research. Looking at a family rate in one postcode and a single-person rate in another makes the comparison useless. PLZHub keeps the scenario labels completely explicit so you can hold the variables constant from page to page.
Step 2: Spot the difference between facts and estimates
The headline tax rate only tells half the story. You have to check whether the page represents a clean municipal read or a statistical estimate. 8001 Zurich falls 100% within one municipality, making its tax numbers highly reliable.
1008 Prilly is a completely different situation. The postcode splits neatly down the middle between the municipalities of Prilly and Jouxtens-MĂ©zery. Its 11.2% single rate is a helpful orientation point, but it's a weighted estimate, not a guaranteed number for your future street address. The same caution goes for broader mixed postcodes like 1040 Echallens, which spans three different local councils. If a postcode doesn't map cleanly to one municipality, the estimate flag matters just as much as the rate itself.
Step 3: Figure out if the difference actually matters
Not every tax difference is worth hiring a moving van. Zurich at 10.1% versus Zug at 7.9% is a massive gap that affects your yearly budget. However, Zurich at 10.1% versus an estimate-based postcode at 9.9% shouldn't drive your decision, especially if the cheaper place dramatically increases your commute or spans multiple municipalities.
Look at the regional context to see the real picture. Canton Zug consistently ranks lower across the board, so its low rates fit the wider landscape. But a tiny fractional advantage inside the same urban area rarely matters as much in real life as the spreadsheet suggests.
When to put the spreadsheet away
PLZHub does exactly one job: it helps you build a solid shortlist. It doesn't sign your lease. Use it to verify things like, "Zug is clearly cheaper than Zurich for my situation," or "I need to check the street address in Prilly because the postcode is split."
Once you start factoring in specific tax deductions, your marital status, your total wealth, or a final street address, it's time to close PLZHub. At that point, the official ESTV tax calculator is the only tool you should trust.
