Carbon Footprint for Swiss SMEs: CO2 Act Reporting Guide 2026
Carbon Footprint Switzerland SME: Your 2026 Reporting Guide
The carbon footprint Switzerland SME picture is unique in Europe — Switzerland is not an EU member, yet Swiss businesses are deeply integrated with EU supply chains and face growing pressure from both the Swiss CO2 Act and the Climate and Innovation Act (KlG). Swiss SMEs exporting to Germany, France, or Austria will increasingly receive CSRD supply chain carbon data requests from their EU customers.
Understanding your Swiss carbon footprint is no longer just good practice — it is a competitive requirement.
Swiss Carbon Legislation: What Applies to SMEs
The Swiss CO2 Act (CO2-Gesetz)
Switzerland's CO2 Act sets a national GHG reduction target of at least 50% below 1990 levels by 2030 (domestic: 30%, international credits: 20%). Key SME-relevant provisions:
- Motor fuel levy (Mineralölsteuer CO2-Abgabe): Included in petrol and diesel prices at Swiss pumps — all Swiss businesses are effectively already paying a carbon price on transport
- Heating fuel CO2 levy (CO2-Abgabe auf Brennstoffe): CHF 120 per tonne CO2 on fossil heating fuels (oil, gas) since 2022 — refunded partially via health insurance and employee contributions
- Swiss ETS (Emissionshandelssystem): Mandatory for industrial sites emitting 25,000+ tCO2e/year — most SMEs are below this threshold
SME direct obligation: Limited. But the CO2 levy on heating fuel and fuel means your energy costs already embed a carbon cost of CHF 120/tonne.
Climate and Innovation Act (Klimaschutzgesetz / KlG)
Accepted by referendum in 2023, the KlG sets: - Net zero target by 2050 - Interim target: -75% by 2040 (very ambitious by international standards) - Industrial heating net zero by 2035 - Government buildings net zero by 2040
This will accelerate building decarbonisation regulations affecting Swiss business premises over the next decade.
Swiss Emission Factors for 2026
Swiss SMEs should use these factors for GHG Protocol-compliant calculations:
| Energy Source | Emission Factor | Source |
|---|---|---|
| --- | --- | --- |
| Swiss grid electricity (average) | 0.027 kgCO2e/kWh | BAFU / Federal Office for the Environment |
| Swiss hydro electricity (HPO certified) | 0.004 kgCO2e/kWh | BAFU |
| Erdgas / natural gas | 0.202 kgCO2/kWh (~2.16 kgCO2e/m³) | BAFU |
| Heizöl EL (heating oil) | 0.265 kgCO2/kWh | BAFU |
| Benzin (petrol) | 0.251 kgCO2/kWh | BAFU |
| Diesel | 0.255 kgCO2/kWh (~2.68 kgCO2e/litre) | BAFU |
Key fact: Swiss electricity has the lowest emission factor in the world among large economies at approximately 0.027 kgCO2e/kWh — due to its 60% hydroelectric + 33% nuclear generation mix. Swiss Scope 2 emissions are negligible compared to EU neighbours.
How Swiss SMEs Calculate Their Carbon Footprint
Step 1 — Collect Energy Data
Scope 1 sources to measure: - Erdgas (gas bills from Energie360°, Ewz, IWB, Romande Energie) - Heizöl deliveries (Litres from fuel delivery notes) - Benzin and Diesel for company vehicles (from fuel cards or receipts) - Propane / LPG for process use
Scope 2 — Electricity: - kWh from your electricity invoice (Stromabrechnungen from EWZ, BKW, CKW, IWB) - With Swiss hydropower certificates (NATUREMADE Star or HPO): market-based Scope 2 near zero
Scope 3 — Key categories for Swiss SMEs: - Business travel: Flights from ZRH/GVA/BSL, intercity rail (SBB) - Employee commuting: Mix of car, SBB, tram, and bike — Switzerland has high public transport use - Purchased goods: Supply chain Scope 3 for manufacturing SMEs
Step 2 — Worked Example: Swiss Professional Services SME
Profile: 28-person consulting firm, Zürich office
| Source | Consumption | Factor | kgCO2e |
|---|---|---|---|
| --- | --- | --- | --- |
| Electricity (Zürich grid) | 85,000 kWh | 0.027 kg/kWh | 2,295 |
| Gas heating | 42,000 kWh | 0.202 kg/kWh | 8,484 |
| Business flights | 180,000 km | avg 0.085 kg/km | 15,300 |
| Car commuting (16 staff) | 120,000 km | 0.168 kg/km | 20,160 |
| Rail commuting (12 staff) | 95,000 km | 0.009 kg/km | 855 |
| Total | 47,094 kg = 47.1 tCO2e |
Per employee: 1.68 tCO2e — reflecting Swiss hydropower electricity dominance and high rail commuting share. Business flights are 33% of the total.
What Swiss Companies Are Asking Suppliers For
Major Swiss corporations with active supply chain carbon programmes: - Nestlé — food and packaging suppliers (very active Scope 3 programme) - Novartis / Roche / Lonza — pharmaceutical supply chain - ABB / Schindler / Georg Fischer — industrial supply chain - Credit Suisse / UBS / Zurich Insurance — financial sector suppliers - Migros / Coop — retail and food suppliers - Swiss Re — insurance and risk supply chain
Additionally, Swiss SMEs supplying German customers face full EU CSRD supplier questionnaire requirements.
Swiss SMEs and EU CBAM
From 2026, Switzerland's ETS is linked to the EU ETS. Swiss exporters of CBAM-covered products (steel, cement, aluminium, chemicals, fertilisers, electricity) supplying EU buyers may face CBAM reporting requirements — you will need certified Scope 1 embedded carbon data for your products.
DeCarbonOPS accepts Swiss energy data in standard units. Enter your kWh, m³, and litre figures and the platform applies Swiss BAFU emission factors. You get a CSRD-ready Carbon Passport accepted by EU, German, and Swiss procurement portals. Free for your first annual report.
Frequently Asked Questions
Does the Swiss CO2 Act require SMEs to report carbon emissions?
The Swiss CO2 Act does not create a direct carbon reporting obligation for SMEs. Large industrial companies may have obligations under the Swiss ETS (Emissionshandelssystem) if they emit 25,000+ tCO2e/year, but most SMEs are well below this threshold. Swiss SMEs are primarily affected through supply chain pressure: Swiss companies supplying German, Austrian, or other EU customers face CSRD Scope 3 data requests requiring GHG Protocol-compliant carbon reporting.
What is the Swiss electricity emission factor for carbon calculations?
The Swiss national electricity emission factor is approximately 0.027 kgCO2e/kWh — one of the lowest in the world. This extremely low factor reflects Switzerland's generation mix: approximately 60% hydroelectric and 33% nuclear, with minimal fossil fuel generation. Swiss businesses purchasing NATUREMADE Star certified electricity or HPO (Herkunftsnachweis Öko) renewable certificates can claim market-based Scope 2 emissions of approximately 0.004 kgCO2e/kWh — effectively near-zero.
How does ETS linking between Switzerland and the EU affect Swiss SMEs?
Switzerland's ETS has been linked to the EU ETS since January 2020 — Swiss industrial installations covered by Swiss ETS participate in the same carbon market as EU ETS participants, buying and selling EU ETS allowances at EU carbon prices (€55–70/tonne in 2024). For SMEs, the main effect is through electricity prices: Swiss electricity prices already include EU ETS pass-through costs from the interconnected EU power market. Swiss SMEs exporting CBAM-covered products to the EU will also face CBAM reporting requirements from 2026.
Which Swiss companies are collecting supplier carbon data?
Major Swiss companies with active supply chain carbon programmes include Nestlé (food and packaging suppliers), Novartis, Roche, and Lonza (pharmaceutical supply chain), ABB, Schindler, and Georg Fischer (industrial supply chain), Migros and Coop (retail and food suppliers), UBS and Zurich Insurance (financial sector suppliers), and Swiss Re (insurance supply chain). Swiss SMEs supplying German customers also face direct EU CSRD supply chain data requests.
Can Swiss SMEs use DeCarbonOPS even though it is EU-focused?
Yes. DeCarbonOPS uses GHG Protocol methodology — the universal standard used globally, including in Switzerland. Swiss energy data (kWh, m³, litres) is entered in standard units and the platform can apply Swiss BAFU emission factors including the 0.027 kgCO2e/kWh electricity factor. The resulting Carbon Passport is accepted by EU procurement portals (for CSRD supplier questionnaires from German, Austrian, French customers) and by Swiss corporate sustainability teams. The first annual report is free.
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