Energy Audit Cost Calculator 2026

The cost of an energy audit for a single-family house is typically PLN 800–2,500, depending on floor area, location and scope of the report. Audits for multi-family buildings are more expensive and can cost PLN 3,000–10,000. The price includes a site visit, thermal calculations and a written report with recommendations.

An energy audit is a detailed analysis of a building's energy consumption with proposals for thermomodernisation measures and an assessment of their cost-effectiveness. An energy performance certificate (EPC) is an official document stating the energy class of a building — required when selling or renting. The audit is more comprehensive and is used for planning renovation works.

An energy audit is mandatory when applying for thermomodernisation funding under the Czyste Powietrze programme (higher subsidy level) and when applying for the BGK thermomodernisation bonus. For public utility buildings over 250 m², audits are required periodically.

Typical savings after comprehensive thermomodernisation are 30–60% of heating costs. Insulating external walls alone can reduce heat loss by 20–30%, replacing windows by 10–15%, and installing a modern heat source (heat pump) by up to 50–70% compared with an old coal boiler.

The audit cost itself is recovered very quickly. With savings of PLN 2,400/year and an audit cost of PLN 1,500, payback occurs in about 7 months. Full thermomodernisation typically has a payback period of 8–15 years, which is significantly shortened by government subsidies.

Yes — under the thermomodernisation relief, the cost of an energy audit is deductible from the PIT or flat-rate tax base. The relief applies to owners or co-owners of single-family houses and covers up to PLN 53,000 of expenditure. Keep the audit invoice and include it in your annual tax return.

An energy audit can be performed by a person with appropriate construction authorisations or registered on the list of energy auditors. When applying for Czyste Powietrze or BGK funding, it is advisable to choose an auditor from the list accepted by the relevant programme.

An energy audit report contains: a description of the existing building (envelope, installations, heat source), calculation of current energy demand, assessment of thermomodernisation options with cost and savings estimates, profitability analysis for each option (simple payback period), and implementation recommendations.

The calculator multiplies current annual energy costs by the expected savings percentage to get the annual saving amount. The payback period is the audit cost divided by annual savings. The 10-year saving is the annual saving multiplied by 10 minus the audit cost. These are indicative values.

Based on an energy audit you can apply for: Czyste Powietrze funding (up to PLN 135,000), the BGK thermomodernisation bonus (up to 21% of costs), the thermomodernisation PIT relief (up to PLN 53,000 deduction), WFOŚiGW loans, and in some municipalities — local grants.