SpotVahtiIn short
Our comparison includes 4 contracts from Fortum: 1 spot-price contract, 1 fixed-price contract and 2 hybrid contracts with a usage effect. The seller’s cheapest contract by home type: Apartment (2,000 kWh): Tarkka, about 235 € a year, rank 28/76; Detached house, no electric heating (6,000 kWh): Tarkka, about 567 € a year, rank 26/75; Detached house, direct electric heating (18,000 kWh): Tarkka, about 1,648 € a year, rank 23/71. The cheapest in the whole comparison for an apartment is Nordic Green Energy Pörssisähkö ei kuukausimaksua, 181 € a year. Prices were checked on 11 Nov 2026 on the seller’s own website.
Contracts
Tarkka Spot price
Margin 0.59 c/kWh, monthly fee 5.99 €
Price checked 11 Nov 2026 on the seller’s website
Takuu 24 kk Fixed price · 24 mo
10.39 c/kWh, monthly fee 5.99 €
Price checked 11 Nov 2026 on the seller’s website
Duo 24 kk Usage effect · 24 mo
9.59 c/kWh ± usage effect, monthly fee 5.99 €
Price checked 11 Nov 2026 on the seller’s website
Duo 12 kk Usage effect · 12 mo
10.99 c/kWh ± usage effect, monthly fee 5.99 €
Price checked 11 Nov 2026 on the seller’s website
Annual price by home type
| Contract | Apartment 2,000 kWh | Terraced house 5,000 kWh | Detached house 6,000 kWh | Heat pump 10,000 kWh | Electric heating 18,000 kWh |
|---|---|---|---|---|---|
| Tarkka | 235 € rank 28/76 | 485 € rank 29/76 | 567 € rank 26/75 | 934 € rank 24/73 | 1,648 € rank 23/71 |
| Takuu 24 kk | 280 € rank 56/76 | 591 € rank 52/76 | 695 € rank 51/75 | 1,111 € rank 51/73 | 1,942 € rank 46/71 |
| Duo 24 kk | 266 € rank 47/76 | 557 € rank 35/76 | 654 € rank 34/75 | 1,044 € rank 34/73 | 1,822 € rank 34/71 |
| Duo 12 kk | 294 € rank 67/76 | 627 € rank 62/76 | 738 € rank 60/75 | 1,184 € rank 59/73 | 2,074 € rank 58/71 |
| Cheapest in comparison | 181 € Nordic Green Energy | 432 € Herrfors | 511 € Herrfors | 863 € Herrfors | 1,549 € Herrfors |
Frequently asked questions
Is Fortum the cheapest in the comparison?
In an apartment (2,000 kWh) the seller’s cheapest contract, Tarkka, ranks 28/76 at about 235 € a year, while the cheapest in the comparison costs 181 €. With direct electric heating (18,000 kWh) the cheapest is Tarkka, ranked 23/71 (1,648 €, cheapest 1,549 €). The ranking depends on consumption, so calculate your own price in the comparison.
Fortum Tarkka: what are the margin and monthly fee?
The margin is 0.59 c/kWh and the monthly fee 5.99 €/month. On top of that you pay the hourly spot price. Price checked on 11 Nov 2026 on the seller’s website.
Fortum Takuu 24 kk: what is the fixed price?
The energy price is 10.39 c/kWh and the monthly fee 5.99 €/month, with a 24-month term. Price checked on 11 Nov 2026 on the seller’s website.
Fortum Duo 24 kk: how are the price and the usage effect calculated?
The fixed part of the energy price is 9.59 c/kWh and the monthly fee 5.99 €/month, with a 24-month term. Each month a usage effect is added or subtracted: your consumption-weighted spot price minus the month’s average spot price. Based on actual Datahub consumption it averaged +0.14 c/kWh over 1 Nov 2025–31 Oct 2026 for metering points using 2,000–20,000 kWh a year. Price checked on 11 Nov 2026 on the seller’s website.
Fortum Duo 12 kk: how are the price and the usage effect calculated?
The fixed part of the energy price is 10.99 c/kWh and the monthly fee 5.99 €/month, with a 12-month term. Each month a usage effect is added or subtracted: your consumption-weighted spot price minus the month’s average spot price. Based on actual Datahub consumption it averaged +0.14 c/kWh over 1 Nov 2025–31 Oct 2026 for metering points using 2,000–20,000 kWh a year. Price checked on 11 Nov 2026 on the seller’s website.
Does the price include transmission?
No. Transmission fees and electricity tax are paid to your local network company and are the same whichever seller you buy electricity from. The annual prices in the comparison include energy, the seller’s margin and the monthly fee, with 25.5 % VAT.
Which contract is cheapest for you?
Calculate your annual price for every contract with your home type and consumption.
Read next
Spot prices: Ember, European Wholesale Electricity Price Data (CC-BY 4.0), original source Nord Pool. Contract prices from the seller’s own website. Method: How we compare. Spotted a mistake? [email protected]