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Tax deduction

Pest infestations can cause hygienic and structural damage and raise tax issues. Which costs owners can claim depends on whether the measures serve the maintenance and preservation of the property's value. The following section explains when pest control is tax-deductible and what to consider when documenting it.

Tax-deductible pest control costs

Swiss tax law allows the deduction of costs that serve to maintain the value of properties. This also includes professional pest control measures, provided that they are aimed at maintaining the property and ensuring hygiene. Property owners may claim such expenses as maintenance costs for tax purposes if they are necessary to keep the property in a functional and safe condition.

This right enables property owners to:

Ensure the hygienic safety of the property
Prevent damage and health risks through professional measures
Deduct the costs of monitoring and control measures in the event of an infestation for tax purposes
Also submit preventive structural protection measures, provided that they serve to maintain the value of the property
Rely on a legally secured basis in order to classify investments appropriately

These works are covered, for example:

Control of mice, rats, and insects
Installation of mesh, excluders, and silicone joints for prevention
Monitoring and documentation in accordance with HACCP requirements
Disinfection after a pest infestation
Replacement of infested insulation with equivalent insulation materials

Important!

The work must not increase the value of the property, but must preserve its original condition.
Receipts, invoices, and, where applicable, photo documentation must be retained and presented upon request.

The following can be deducted from income:

a) The costs of maintaining real estate held as private property, including insurance premiums and costs of management by third parties;
b) For owner-occupied properties, at most the imputed rental value.

Non-deductible pest control costs

Not all expenses related to pest control can be claimed for tax purposes. As soon as a measure is considered value-enhancing or has no direct connection with the maintenance of the property, it is not deductible. Tax law clearly distinguishes between preserving the existing condition and improving or upgrading a property.

This restriction means the following for property owners:

Value-enhancing measures cannot be declared as maintenance
Investments that go beyond the original construction standard are not tax-deductible
Expenses paid by tenants or third parties are not considered costs of the property owner
Service subscriptions without a specific reason are generally not tax-privileged
Measures with a luxury character or which increase comfort are considered private expenses

These works are, for example, not deductible:

Replacement of a floor with higher-quality material after a pest infestation
Extensive renovations combined with pest protection, if they increase the value of the property
Pest protection in new buildings, if preventive and without a specific reason
Service contracts without documented infestation or specific need
Pest control carried out by tenants, as it is not a service provided by the property owner

Important!

Measures are only considered deductible if they preserve the original condition.
Value-enhancing work or work exceeding the original standard is considered part of private living expenses.
Individual cases may be assessed differently by the cantonal tax administration.