Certificate of Origin
An EU-supervised certificate (Guarantee of Origin, GO) that confirms an equivalent amount of electricity has been produced by the stated source — e.g. wind, hydro or nuclear.
The certificate of origin is a market mechanism that lets consumers finance renewable or nuclear production without needing to physically trace a specific electron to a single home. Grid electricity mixes from all producers, but every MWh produced receives a matching certificate on the market platform.
A consumer whose contract carries a certificate of origin pays for a matching volume of certificates from the power plant selling them. Your purchase does not change the electricity coming out of the socket, but it steers the market: your money flows to the chosen production form.
A certificate of origin can be attached to any electricity contract type. The most common verifications in Finland are "renewable" (wind + hydro), "nuclear" and "fossil-free" (nuclear + renewable combined).
How does a certificate of origin work in practice?
Every megawatt-hour produced by renewable or nuclear power receives one certificate of origin. The power plant sells certificates on the market platform (in Finland maintained by Grexel Systems). An electricity retailer with customers on origin-verified contracts buys a matching volume and retires the certificates at year-end.
The consumer price of one certificate is typically 0.1–0.8 c/kWh — some contracts include it with no extra charge, others add a small premium.
What a certificate of origin does not mean
A certificate of origin does not mean that the electricity physically reaching your socket is wind power. The grid mixes all producers — physical tracing to a single consumer does not exist. The certificate is accounting: a volume equivalent to your purchase was produced by your chosen source.
It is also not the same as "green electricity" as a marketing term. Under EU Directive 2024/825 (EmpCo), terminology must be precise: we speak of origin-verified renewable or fossil-free electricity.
Certificates of origin and your electricity bill
If you want electricity verified with a guarantee of origin, filter the comparison by "Fossil-free electricity". In Finland most retailers offer an origin-verified version either by default on all contracts (Fortum, Nordic Green Energy, Vihreä Älyenergia) or as an add-on.
The practical cost impact is small — at 5,000 kWh annual consumption the certificate premium is typically 5–40 € per year.
Frequently asked questions
How much does a certificate of origin cost the consumer?
In practice 0.1–0.8 c/kWh. At 5,000 kWh annual consumption the cost impact is 5–40 €. Many retailers (Fortum, Vihreä Älyenergia, Nordic Green Energy) include it in all contracts at no extra charge.
How do I know if my contract has a certificate of origin?
Check your contract confirmation or online service for the "origin" or "production form" line. If the contract mentions "fossil-free", "100% renewable", "origin-verified" or "GO-certified", it is verified with a guarantee of origin. Finnish Energy Authority requires retailers to disclose origin annually.
Is a certificate of origin the same as green electricity?
Not entirely. "Green electricity" is a marketing term limited by EU Directive 2024/825 (EmpCo). A certificate of origin is a concrete EU-supervised certificate verifying production form. Read product descriptions — origin-verified contracts state the production form clearly.
Can a certificate of origin be added to an existing contract?
Depends on the retailer. Some (e.g. Fortum) offer a "100% renewable" add-on service to existing contracts for a small monthly fee. For others the feature is the contract default and applies only to new customers.
See also
- Renewable energy — Renewable energy is electricity production based on continuous natural flows: wind, hydro, solar and biomass. In the Finnish…
- Nuclear power — Nuclear power is electricity from uranium fission. Finland has nuclear at Loviisa (2 units) and Olkiluoto (3 units)…
- Fossil-free — Fossil-free electricity means certified-origin electricity that is NOT produced with fossil fuels (coal, oil, gas). Includes nuclear power…