Heating sector: Energy Regulator reminds businesses they are required to publish the single-component net heat price
Concerning the Heat Stamps Law[1], power companies are required to publish their single-component net heat prices by tomorrow, 7 October 2025. The publishing of the prices is essential for proper calculation of the Heat Stamp value for district heat consumers who are eligible for Heat Stamps by income level[2].
Which entities are bound by this requirement?
The single-component net heat price is not required to be published by those power companies which:
- sell their generated heat directly;
- trade in heat;
- transmit or distribute heat to consumers on a heat sales contract with other power companies.
How is a single-component heat price calculated?
The single-component net heat price is calculated as a ratio of the planned revenue (based on an establish tariff) and the planned quantity of heat sold. The planned revenue includes proceeds from selling heat, heating power, heating carrier, and from the fixed and variable heat transmission and distribution fees.
For local heating stations with a capacity limited to 5 MW (which do not need to seek licenses or tariff approvals), the planned revenue includes the proceeds from selling heat and heating power, calculated from the prevailing prices or fees. Not unlike for bigger heat generators, the single-component net heat price is calculated as the ratio of the planned revenue and the planned quantity of heat sold.
By October the 7th, the power companies are required to publish their single-component net heat prices applied on the effective date of the Heat Stamp Law, which was September the 30th.
Where should the single-component net heat price be published?
It is required to be posted on the official website of the power company concerned or announced in another customary manner.
How does the single-component net heat price affect the Heat Stamp value paid?
The Heat Stamp is a benefit to which district heating consumers are eligible up to a specified income level if their single-component net heat price is 170 PLN/GJ net or higher. There is a different Heat Stamp value applied for three threshold levels of the single-component net heat price. Each Heat Stamp assigned is payable twice, for the second half of this year and for the entire 2026.
If the single-component net heat price is more than 170 PLN/GJ net and less than 200 PLN/GJ net, the Heat Stamp payable to eligible consumers is 500 PLN for the second half of 2025 and 1000 PLN for 2026.
If the single-component net heat price is more than 200 PLN/GJ net and less than 230 PLN/GJ net, the Heat Stamp payable to eligible consumers is 1000 PLN for the second half of 2025 and 2000 PLN for 2026.
The highest Heat Stamp value bracket is for private households which purchase their district heat for more than 230 PLN/GJ net of the single-component heat price. If these consumers meet the applicable income level, their Heat Stamp payable is 1750 PLN for the second half of 2025 and 3500 PLN for 2026.
Second publication deadline for the single-component net heat price
Considering the potential changes in tariffs and rates for district heat in the next year, the legislator has established a second mandatory publication deadline for the single-component net heat price. This price, as resulting from the tariffs (or rates and fees) applied until 31 May 2026, shall be published by 15 June 2026.
[1] Polish Law of 12 September 2025 concerning the Heat Stamps and Amending Certain Acts of Law to Reduce Electricity Prices (Dz.U. 2025.1302)
[2] The monthly income levels of eligibility are 3272.69 PLN per single-occupant household and 2454.52 per occupant in a multi-occupant household; for a monthly income higher than the respective level of eligibility, the Heat Stamp value will be reduced by 1 PLN to every 1 PLN of income above the level.