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Municipal profile

Coat of arms of Au (SG)

Au (SG)

Canton: St. Gallen (SG)

Civiora Index

Derived from official data

72/100

Above the median

National rank: 271 / 2’110 · Top 13% nationally

Taxes76/100
Premiums83/100
Electricity17/100
Housing76/100
PT service91/100

Confidence level: high · v1.1.0 · Civiora Index computed from official public data. Proprietary, non-official index. Understand the index

Median altitude404 m
Area4.7 km²
Postcode9434
FSO no.3231
DistrictWahlkreis Rheintal
Tax burden11.1 %Single, CHF 80’000 · 2026 less than SwitzerlandSwiss median: 13.1 %
Electricity price30.2 ct./kWhH4 · 2027 more than SwitzerlandSwiss median: 26.9 ct./kWh
Health insurance premiums554 CHF/monthAdult · 2027 less than SwitzerlandSwiss median: 599 CHF
Population8’771+9.9 % over 5 years (2020–2025) more than SwitzerlandSwiss median: +4.4 %
Vacancy rate1.53 %01.06.2026 more than SwitzerlandSwiss median: 0.83 %
Public transport stops13At least one rail stop

Taxes: tax burden by scenario

Tax burden ranking →Official

On a salary of CHF 80’000 a year, a single person in Au (SG) pays 11.1% of their gross income in tax, or about CHF 8’850 a year. That is CHF 1’640 less than in the median Swiss municipality.

Au (SG)Swiss median
Single, CHF 80’000 approx. 8’850 CHF/year1’640 CHF/year less
11.1 %
13.1 %
Single, CHF 120’000 approx. 17’520 CHF/year3’180 CHF/year less
14.6 %
17.2 %
Married couple, CHF 120’000 approx. 11’820 CHF/year1’640 CHF/year less
9.8 %
11.2 %
Family, 2 children, CHF 150’000 approx. 12’880 CHF/year2’020 CHF/year less
8.6 %
9.9 %
Retiree, CHF 80’000 approx. 11’060 CHF/year1’930 CHF/year less
13.8 %
16.2 %

2026 tax burden in % of gross income (federal, cantonal and communal taxes; earned income, no wealth, no church tax). Calculation FTA, Swiss tax calculator.

Federal Tax Administration (FTA)Tax burden 2026: Swiss tax calculator (model cases)View source

Electricity

2027 tariff ranking →Official

A typical household (profile H4, 4’500 kWh a year) in Au (SG) pays 30.23 ct. per kWh, or about CHF 1’360 a year. That is CHF 149 a year more than in the median Swiss municipality.

30.23 ct./kWh

more than SwitzerlandSwiss median: 26.91 ct./kWh

Tariff breakdown

Energy (the electricity itself) 13.32Grid (delivery to the meter) 12.29Levies and surcharge (public charges and levies) 4.62ct./kWh

Federal Electricity Commission (ElCom)Electricity tariffs 2027, profile H4, standard productView source

Health insurance premiums

2027 premium ranking →Derived from official data

An adult in Au (SG) pays a median CHF 554 a month for basic health insurance, or about CHF 6’650 a year (CHF 300 deductible, accident cover included). That is CHF 45 a month less than the Swiss median (CHF 599).

554 CHF/month

less than SwitzerlandSwiss median: 599 CHF

Median monthly premium 2027, adult (26+), CHF 300 deductible, with accident, standard model: median of the 25 offers in premium region SG-2 (Civiora calculation on FOPH data).

Official FOPH average premiums 2027 (all deductibles and models)

Adult423.70 CHF/monthapprox. 5’080 CHF/year
19–25 years288.50 CHF/monthapprox. 3’460 CHF/year
Child111.10 CHF/monthapprox. 1’330 CHF/year

Federal Office of Public Health (FOPH)Compulsory health insurance premiums 2027 (priminfo)View source

Population and demographics

Official

Au (SG) has 8’771 inhabitants at the end of 2025, 9.9% more than five years ago (Swiss median: +4.4%).

Population change 2010–2025

8’771 inhabitants

Density: 1’886 inhab./km² · 2025

+1.7 % vs previous year (2024–2025)

Age structure (2025)

0–19 years 20.0 %20–64 years 61.8 %65 and over 18.2 %

About 1 resident in 5 is under 20, and 1 in 5 is 65 or over. About 4 in 10 residents (38.9%) hold a foreign nationality.

Federal Statistical Office (FSO)STATPOP: permanent resident population (STAT-TAB), status 31.12.2025View source

Housing

Vacancy rate ranking →Official

On 1 June 2026, 1.53% of homes in Au (SG) were vacant, about 1 in 65 (Swiss median: 0.83%). The higher this rate, the easier it is to find a home.

Vacancy rate 2016–2026

Vacant dwellings6501.06.2026
Housing stock (2024)4’200

Federal Statistical Office (FSO)Vacant dwellings count, 1 June 2026View source

Federal Statistical Office (FSO)Buildings and dwellings statistics (GWS): housing stock 2024View source

Public transport

Derived from official data

Au (SG) has 13 public transport stops. On an ordinary Tuesday, 1’344 departures are scheduled across all stops, 223 of them after 8 pm.

Public transport stops13At least one rail stop
Departures on a typical Tuesday1’344of which evening (from 8 pm): 223 (17 %)
Departures on a typical Sunday89967 % of the typical Tuesday
Public transport stops / 1’0001.48Swiss median: 3.33

Departures counted in the official 2026 timetable (GTFS) on typical days: Tuesday 08.09.2026 and Sunday 13.09.2026. Every call at every stop in the municipality counts as one departure. Civiora calculation.

opentransportdata.swiss (ATLAS, SBB on behalf of the Confederation)Public transport service points, status 04.08.2026View source

opentransportdata.swiss (official GTFS timetable)2026 timetable (GTFS, 01.08.2026 edition): typical daysView source

Territory and local economy

Official

Au (SG)’s territory is 52.1% built-up, 36.7% farmland and 4.5% forest (survey 2004/2009).

Built-up 52.1 %Farmland 36.7 %Forest 4.5 %Other (water, rock…) 6.7 %
Jobs4’807reference year 2018
Establishments599reference year 2018
Social assistance rate2.2 %reference year 2019

Federal Statistical Office (FSO)Regional portraits 2021: key figures of communesView source