Understanding KBOB Emission Factors for Swiss Businesses

When calculating greenhouse gas (GHG) emissions for sustainability reporting, the accuracy of your emission factors is crucial. For Swiss businesses, the KBOB dataset provides the gold standard for lifecycle-based emission calculations.

What is KBOB?

KBOB (Koordinationskonferenz der Bau- und Liegenschaftsorgane der öffentlichen Bauherren) maintains the official Swiss database of lifecycle assessment data. The current version, KBOB Ökobilanzdaten 2009/1:2022 v8.0, provides emission factors specifically calibrated for the Swiss context.

The dataset is maintained jointly by KBOB, ecobau, and IPB, and is updated periodically to reflect changes in the Swiss energy mix, fuel compositions, and upstream supply chains. It is the standard reference for federal construction projects, cantonal energy reporting, and — increasingly — corporate sustainability disclosures.

Why KBOB Matters for Your VSME Report

Swiss-Specific Accuracy

Unlike generic international emission factors, KBOB accounts for the particularities of the Swiss energy system:

• Electricity: The Swiss grid mix is roughly 60% hydropower, 30% nuclear, and 10% other sources. This gives it a significantly lower carbon intensity (0.125 kg CO2e/kWh) than the EU average (~0.250 kg CO2e/kWh). Using a generic European factor would overstate your Scope 2 emissions by roughly 2x.
• Heating fuels: KBOB factors for heating oil (3.24 kg CO2e/L) and natural gas (0.230 kg CO2e/kWh) include the full lifecycle — extraction, refining, transport, and combustion — not just combustion at the burner.
• Transport fuels: Diesel (3.24 kg CO2e/L) and petrol (3.00 kg CO2e/L) factors similarly include upstream well-to-tank emissions.

How KBOB Compares to Other Databases

The key difference: KBOB gives you one authoritative number per energy source for Switzerland. Other databases require you to select the correct region, methodology, and system boundary — which is where mistakes happen.

Credibility and Acceptance

Using KBOB factors strengthens your report's credibility because:

• They are government-endorsed — published by a federal coordination body
• They are the standard reference for Swiss climate reporting under Art. 964a OR
• Auditors, banks, and business partners in Switzerland expect them
• They enable comparability across Swiss businesses

Key Emission Factors

Here are the most commonly used KBOB lifecycle emission factors for corporate reporting:

Important: These are lifecycle emission factors, not combustion-only. They include upstream emissions from extraction, processing, and transportation of energy sources, as specified in the KBOB 2009/1:2022 v8.0 dataset.

Common Pitfalls When Using KBOB Factors

1. Mixing lifecycle and combustion-only factors. Do not combine KBOB factors (lifecycle) with DEFRA or EPA factors (often combustion-only) in the same report. Stick to one methodology.
2. Using outdated versions. The 2022 v8.0 dataset replaced earlier versions with updated grid mix data. Always verify you are using the current version.
3. Confusing units. Heating oil and vehicle fuels are measured in litres. Natural gas and electricity are in kWh. Mixing these up is the most common calculation error.
4. Double-counting upstream emissions. Since KBOB factors already include upstream emissions, do not add a separate "well-to-tank" adjustment.
5. Ignoring renewable electricity certificates. If your company purchases certified renewable electricity with guarantees of origin, you may use a market-based Scope 2 factor (potentially near zero) instead of the grid average. Document your certificates.

QuickVSME Integration

QuickVSME automatically applies the latest KBOB factors to your energy consumption data. Enter your electricity in kWh, heating oil in litres, gas in kWh, and vehicle fuel in litres — the platform computes Scope 1, Scope 2, totals, and GHG intensity automatically.

Sources

• KBOB Ökobilanzdaten im Baubereich
• ecobau Ökobilanzen
• GHG Protocol Corporate Standard