Carbometer

Renting in Germany? See how much of the CO2 cost your landlord pays

Since 2023, tenants and landlords in Germany share the CO2 cost of heating. The calculator finds your building's stage and the landlord's share.

How is your flat heated?

Own boiler means you have your own gas contract just for your flat.

Fuel
kWh

Shown on the heating cost statement or energy bill.

m²
m²

For a rough estimate of your personal share.

€/t

Shown on your supplier’s bill. Reference values: 2023: 30 €, 2024: 45 €, 2025: 55 €, 2026: 55–65 €, 2027: 55–65 €.

 

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Landlord’s share of the building’s CO2 cost

kg CO2 per m² per year
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Total CO2 cost (incl. VAT)
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Tenants’ share
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Calculated with the official emission factors from Germany’s EBeV 2030 regulation. Last reviewed: September 2026. See methodology

The 10 stages of the German CO2 cost-sharing law

  1. 1 0 – < 12 kg/m² 100 %
  2. 2 12 – < 17 kg/m² 90 % 10 %
  3. 3 17 – < 22 kg/m² 80 % 20 %
  4. 4 22 – < 27 kg/m² 70 % 30 %
  5. 5 27 – < 32 kg/m² 60 % 40 %
  6. 6 32 – < 37 kg/m² 50 % 50 %
  7. 7 37 – < 42 kg/m² 40 % 60 %
  8. 8 42 – < 47 kg/m² 30 % 70 %
  9. 9 47 – < 52 kg/m² 20 % 80 %
  10. 10 ≥ 52 kg/m² 5 % 95 %
  • Tenant
  • Landlord

All amounts incl. 19% VAT. Source: CO2KostAufG, Anlage (zu den §§ 5 bis 7)

How the 10-stage model works

The split depends on how much CO2 the building emits per square metre of living area each year. The worse the building's energy performance, the higher the stage and the larger the landlord's share: from 0% at stage 1 to 95% at stage 10.

If you have your own gas boiler

Tenants with their own gas contract pay the full CO2 cost first. The landlord must refund their share, and tenants need to claim it within 12 months of receiving the gas bill. Choose “Own boiler in the flat” above to work out the amount.

Exceptions

Commercial premises are split 50/50 without the stage model. If heritage or conservation rules prevent energy upgrades, the landlord's share can be halved or dropped.

This calculator gives an estimate and is not legal advice. Last reviewed: 30 September 2026