Is your business on the last resort supply tariff?
Enter your tariff group and annual consumption. We check against the 2026 thresholds whether you are an eligible consumer and whether the last resort tariff (SKTT) applies.
Illustrative check based on EPDK decisions 13912 and 14039. Your incumbent supplier’s notice and bill are decisive.
How the check works and which rules it follows
How the energy charge on your bill is calculated depends on your annual consumption and on whether you have a bilateral contract with a supplier. This tool answers two questions: can you choose your supplier, and which tariff applies if you have no contract.
What is the last resort supply tariff
The last resort supply tariff (SKTT) is applied by the incumbent supplier to consumers without a bilateral contract whose annual consumption exceeds the threshold set by EPDK. Consumers below the threshold stay on the regulated national tariff.
Under SKTT the energy charge is not a fixed unit price. Each day, the Board coefficient (KBK) is applied to the sum of the day-ahead clearing price (PTF) and the YEKDEM cost, so the bill moves with wholesale prices.
SKTT energy charge (daily) = (PTF + YEKDEM) × KBK
2026 thresholds and tariff groups
EPDK Board Decision 13912 of 30 October 2025 set the thresholds and coefficients for 2026. The decision took effect on 1 January 2026.
The logic of the check
The tool checks three conditions in order: whether you are an eligible consumer, whether consumption exceeds your group’s last resort threshold, and whether you have a bilateral contract. The threshold is checked against consumption in either the current or the previous calendar year.
The eligibility threshold and the last resort threshold are different
The eligibility threshold is the minimum consumption needed to choose a supplier: 500 kWh in 2026 (EPDK decision 14039 of 18 December 2025). The last resort threshold decides which tariff applies if you have no contract. A business can be eligible and still be below the last resort threshold.
Under the last resort tariff, the bill is recalculated every day with the wholesale price.
An illustrative calculation
Take a commercial business that consumed 18,000 kWh in 2025 and has no bilateral contract. Consumption exceeds the 15,000 kWh threshold, so SKTT applies.
Illustrative calculation. The PTF + YEKDEM average is an assumption; the real calculation uses daily values. Distribution charges, taxes and levies are excluded.
Regulatory timeline
What it means for businesses
A business on SKTT pays the energy charge at KBK above the wholesale price and carries the full price risk. A bilateral contract can change both: the price structure is set in the contract as fixed, indexed or layered.
Comparisons should use the same period and the same consumption profile. Distribution charges, taxes and levies are the same whichever option you choose; the difference is in the energy charge.
At Frekans we supply eligible consumers through bilateral contracts. If your result shows the last resort tariff, we can review your consumption profile from your recent bills and agree the right price structure with you.
We use essential cookies to run the site and remember your language. Analytics and marketing cookies are only used with your consent. You can change your choice at any time from the footer. Cookie Policy