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Who pays if heating oil leaks from the tank in Germany?

In short

Who pays if heating oil leaks from the tank in Germany? For soil and groundwater you are liable as the operator of the tank, even without fault. Oil tank liability insurance (Gewässerschadenhaftpflicht) covers this, usually EUR 30 to 60 a year for a cellar tank up to 5,000 litres. Buildings insurance only pays for oil damage to the house if an insured peril such as fire caused the leak.

Who pays if heating oil leaks from the tank in Germany?

What it costs

Published premiums for oil tank liability insurance and typical sizes of oil damage in Germany.

ExampleTypical range
Above-ground tank in the cellar up to 3,000 litresabout EUR 25 to 40 a year
Above-ground tank up to 5,000 litresabout EUR 30 to 60 a year
Underground tank up to 10,000 litresabout EUR 60 to 120 a year
Fire brigade pumping out oil in a published complaint casearound EUR 1,460
Clean up after an oil leakabout EUR 50,000 to over EUR 100,000

As of November 2026, premiums and damage amounts from published sources.

The individual amounts in the worked example are guideline values from our quoting practice.

We check what your policy provides for rescue costs and your own land; we obtain the exact quote.

Worked example

Cellar tank with 4,000 litres leaks unnoticed

A crack in the tank floor, the oil runs into the drip tray, which also leaks. It soaks the screed and seeps under the floor slab. Calculation with guideline values.

Fire brigade and pumping outabout EUR 1,500
Investigating and replacing soil under the houseabout EUR 40,000
Renewing cellar screed and plasterabout EUR 12,000
With oil tank liability insurancepumping and soil, if the policy includes clean up of your own land
Buildings insuranceEUR 0, no fire, no mains water, no other insured peril

Without oil tank liability insurance you pay around EUR 53,500 yourself here. Whether the screed is paid as part of the clean up depends solely on your oil tank policy.

Why you as the tank owner are liable first

If oil escapes from a facility for storing substances into a body of water and worsens the water, section 89 (2) of the German Water Resources Act (Wasserhaushaltsgesetz, WHG) makes the operator of that facility liable. Fault does not matter; only force majeure removes the duty to pay. Groundwater counts as a body of water.

For your oil tank in the cellar or garden, you are therefore the first point of contact for the authority, your neighbours and the water supplier, even if a part failed or the driver made a mistake. Whether you can later recover the money from someone else is a separate question.

Which policy pays which part

An oil leak usually has three parts: oil in soil and groundwater, damage to the house itself and the lost heating oil. Each has a different payer, and often no one pays for one of them.

Oil tank liability insurance deals with oil in soil and water. Buildings insurance (Wohngebaeudeversicherung) under the model terms only pays if an insured peril caused the oil to escape. A tank that simply leaks is not an insured event for buildings insurance.

DamageWho paysNote
Oil seeps into soil or groundwaterOil tank liability insuranceliability without fault
Fire brigade pumps out the oil to stop it spreadingOil tank liability insurancecosts of preventing the damage
Oil soaks into the cellar screed after a leakusually no oneheating oil is not mains water
Fire destroys the tank, oil contaminates the houseBuildings insurancefire is an insured peril
Flood lifts the tank, oil runs outBuildings insurance with natural hazards coverwithout it no cover for the house
The leaked heating oil itselfBuildings insuranceonly after an insured event, up to the agreed amount
Oil sprays from the tanker hose while fillingSuppliertheir liability insurance

What buildings insurance pays and what it does not

Under the model terms of German insurers (VGB 2022), mains water also includes the fluid in heating systems. Liquids intended to generate energy are expressly excluded. Heating oil escaping from a tank or oil pipe is therefore not a mains water claim.

If an insured event such as fire or, with natural hazards cover, a flood caused the oil to escape, buildings insurance pays for the damage to the house. The model terms then also provide for the cost of lost heating oil, limited to an agreed amount per claim.

Replacing contaminated soil is not on the basic list of costs. A separate clause covers it. In one published tariff it only pays after an official order issued within nine months of the insured event, and only for contamination that demonstrably comes from that event.

If the supplier is at fault

On 21.01.2015 the Higher Regional Court of Munich (OLG Muenchen, 15 U 2296/14) ruled that a heating oil supplier is liable when a hose on the tanker leaks during pumping and oil sprays onto the property. Unloading is part of operating the vehicle.

It is different if the fault lies with your system, for example a faulty overfill sensor (Grenzwertgeber). Then the damage stays with you. Always have someone present during filling, note the time, quantity and driver's name, and photograph any oil traces at once.

When you do not need oil cover

If you heat with gas, district heating or a heat pump and there is no oil tank left on the property, the risk is gone. As a tenant you usually need nothing if the owner operates the tank.

A decommissioned tank that still holds oil remains a risk. Only once it has been emptied, cleaned and properly taken out of service does the danger end. Until then, keep the oil tank liability insurance.

Step by step

  1. Stop the leak at once, switch off power to the heating and call the fire brigade if oil runs into drains or soil.
  2. Report the claim to your oil tank liability insurer and, in parallel, to your buildings insurer.
  3. Keep photos, the delivery note, the time and the driver's name if it happened during filling.
  4. Do not commission a clean up without agreeing it with the insurer, except to prevent further damage.
  5. Ask for any rejection in writing; consumers can turn to the insurance ombudsman (Versicherungsombudsmann) free of charge.

Checklist

  • Oil tank liability insurance in place for tank size and position
  • Rescue costs and clean up of your own land settled in the policy
  • Natural hazards cover in buildings insurance if floods are possible
  • Soil decontamination clause included
  • Overfill sensor and drip tray checked by a specialist
  • Someone always present during filling

Common mistakes

  • Treating leaked heating oil as a mains water claim
  • Relying on personal liability insurance, which usually does not cover a heating oil tank
  • Decommissioning the old tank but leaving residual oil in it and cancelling the policy
  • Not being present during filling and later being unable to prove anything
  • Hiring a clean up firm before the insurer and the authority know

Questions and answers

Frequently asked

Does buildings insurance pay if my oil tank leaks?

Not for a simple leak.

Heating oil does not count as mains water.

Buildings insurance only pays if an insured peril such as fire caused the oil to escape.

Who pays if the tank overflows during filling?

If the fault lies with the supplier or the tanker, the supplier is liable.

If it lies with your overfill sensor or tank, the damage stays with you.

Towards the authority and third parties you are liable first as the operator.

Does my personal liability insurance cover the oil tank?

Usually not.

It normally covers small containers only.

For a heating oil tank you need separate oil tank liability insurance or a matching add-on.

What if a flood damages the oil tank?

Buildings insurance only pays for damage to the house with natural hazards cover.

Oil tank liability insurance deals with oil in soil and water.

Do I have to pay for leaked heating oil as a tenant?

Usually not, because the owner operates the tank and is liable as operator under the Water

Resources Act.

If you run tank and heating yourself, clarify cover in advance.

Is oil tank liability insurance worth it for a small tank?

Yes.

Even a few litres in the soil can trigger an expensive clean up,

and the premium for small cellar tanks is about EUR 25 to 40 a year.

Sources

NAMMERT insurance broker

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