Closed beta·The first secondary CAE marketplace in Spain, currently in development·Request an invitation
Sell your CAE on a transparent market, without opaque intermediaries
Publish the Energy Saving Certificates you have issued in an order book with a discovered price and close the sale with regulatory contracts signed via eIDAS and direct SEPA payment. Designed for MITECO-accredited Delegated Subjects who want to monetize their CAE portfolio without waiting for a bilateral buyer.
Commission from 0.15 %
Delegado plan seller rate. Full public grid with no hidden fees.
SEPA settlement 5 - 8 days
Estimate from contract signature to receipt on your account, with no escrow.
Discovered price
Daily order book versus opaque bilateral OTC negotiation.
Monetizing freshly issued CAE should not depend on your contacts
A Delegated Subject who has just received the favorable resolution from the Gestor Autonómico and registration in the National CAE Registry has a clear goal: turning those certificates into cash as quickly as possible at the best price. Today, with 66 Delegated Subjects accredited by MITECO (April 2026) and a 2025 national obligation of 4 942 GWh, demand exists but is not always within reach.
Outside an organized market, the seller's reality is:
- Limited access to buyers: you need to personally know the purchasing managers at each energy supplier.
- Price opacity: each negotiation starts from scratch, with no public reference on the latest comparable transaction.
- Bilateral negotiation case by case, with weeks of back and forth on price, volume, CAE validity and transmission schedule.
- Broker commission between 1 % and 3 % of the value when an intermediary is used to speed up the sale.
What you find on the CAE Market as a seller
Daily market price in an order book
You publish your order with a floor price and the platform automatically matches the demands of active Obligated Subjects. Every transaction feeds a daily index visible to participants, replacing bilateral speculation with a public, verifiable reference price.
Low commission vs. traditional broker
The seller rate on the CAE Market ranges from 0.70 % (without a Gestión subscription) to 0.15 % (Delegado plan), versus the usual 1 % to 3 % of an intermediary broker. On a 260,000 EUR transaction, moving from a broker at 2 % to the Corporativo plan at 0.35 % means saving more than 4,200 EUR.
Art. 17.2 TED/815/2023 contracts auto-generated
Matching triggers the automatic generation of the sale contract with all the regulatory data required by article 17.2 of Orden TED/815/2023 and the simultaneous eIDAS signature of both parties via DocuSeal. No manual drafting, no PDFs exchanged back and forth by email.
Predictable cash flow with documented timing
From contract signature to receipt of the SEPA payment on your account, the estimated timeframe is 5 to 8 business days: 48 hours for signing, 5 official business days for the MITECO transmission, a standard SEPA cycle. The seller keeps documentary control of the process at all times.
Calculate your net revenue and the difference versus a broker
Enter the volume of CAE you have available to sell, the target price and your current SaaS Gestión plan. The calculator applies the official seller commission grid and compares the net revenue with a broker reference at 2 %, the midpoint of the usual 1 % - 3 % range in intermediated OTC transactions.
Details of your planned sale
Total volume of issued CAE available for sale, in megawatt hours. Minimum volume per order on Mercado CAE: 30 MWh.
Observed range 2026: 115 - 140 EUR/MWh. FNEE 2025 ceiling price (MITECO): 189.17 EUR/MWh.
The seller commission depends on your SaaS Gestion subscription. During the trial period, the reduced rate already applies. View official schedule.
Applicable seller commission
Corporativo client (399 EUR/month)·commission 0,35 %
Estimated result
| Gross revenue (volume x price) | 125.000,00 EUR |
|---|---|
| Mercado seller commission (0,35 %) | -437,50 EUR |
| Net revenue Mercado CAE | 124.562,50 EUR |
| Net revenue via broker (2,00 % reference) | 122.500,00 EUR |
| Difference vs broker 2 % | +2.062,50 EUR |
Indicative estimate. The actual difference depends on the commission effectively negotiated with the broker (observed range 1 % to 3 %) and on the matching price in the order book. The broker reference rate (2,00 %) is an average of the typical range for intermediated OTC transactions. This is neither a binding offer nor a market price forecast.
Cash flow timeline: from publication to SEPA received
The sum of the operational and regulatory timeframes places the CAE SEPA payment between 10 and 12 business days after your order is published. Each stage has an identified owner and is tracked on the platform. The timeframes are estimates based on the official MITECO procedure and the standard SEPA cycle.
- D0
Order publication
You publish your sell order in the book with volume (MWh), floor price (EUR/MWh) and the reference of the CAE registered in the National Registry. The order becomes visible to all active Obligated Subjects.
- D+1 a D+2
Matching
Matching with purchase demands typically occurs within 24 to 48 hours depending on the book's liquidity. For large volumes it may take longer while the book aggregates several partial demands.
- D+2 a D+4
eIDAS signature by both parties
After matching, the platform sends the Art. 17.2 TED/815/2023 contract to both parties for eIDAS electronic signature. Usual bilateral signing time: 48 hours. If the counterparty does not sign, the order returns to the book with no penalty.
- D+4 a D+9
MITECO transmission
You have 5 official business days from signature to file the transmission request on the MITECO Electronic Office. The platform automatically generates the form and provides you with the tracking link.
- D+9 a D+10
HM Capital invoicing and SEPA payment
HM Capital SARL issues the two commission invoices (MKT-S for the seller, MKT-B for the buyer). The buyer triggers the direct SEPA payment to your bank account using the details exchanged on the platform.
- D+10 a D+12
SEPA received on account
Standard SEPA bank timeframe until the credit reaches your account. Total estimated time from order publication to receipt of payment: 10 to 12 business days.
Operational estimate. The actual timeframe depends on the book's liquidity at the time of publication, the volume sold and the internal validation times of the competent Gestor Autonómico.
CAE Market versus bilateral OTC and traditional broker
Three routes to sell your CAE, compared across the dimensions that truly change net revenue and time to payment.
| Dimension | CAE Market | Bilateral OTC | Broker |
|---|---|---|---|
| Access to buyers | Open book | Personal network | Broker network |
| Seller commission | 0,15 % - 0,70 % | 0 % direct | 1 % - 3 % |
| Sale timing | 24 - 48 h matching | Weeks | Weeks |
| Price | Discovered | Bilateral negotiated | Broker margin |
| Contracts | Auto-generated | Own drafting | Broker template |
| Signature | Integrated eIDAS | Paper or external tool | Variable |
| MITECO transmission | Tracked on platform | Manual | Manual |
| Payment | Direct SEPA | SEPA / transfer | Broker intermediary |
Use case: energy manager with 2 000 MWh in IND050
Energy manager Delegated Subject specialized in industrial LED lighting (IDAE file IND050) who issues 2 000 MWh of CAE during the first quarter and seeks to monetize them quickly at the best price.
Action
Publishes their sell order on the CAE Market at 130 EUR/MWh with the Corporativo plan (commission 0.35 %). The book aggregates an Obligated Subject's demand within 48 hours and the order moves to confirmed matching.
Result
Gross revenue 260,000 EUR, seller commission 910 EUR, net revenue 259,090 EUR. eIDAS signature on day D+3, MITECO transmission request on day D+4, SEPA received on day D+11. Cash flow closed in under two weeks.
Difference vs broker 2 %
The same operation via a broker at 2 % would have left a net revenue of 254,800 EUR. The estimated difference versus the CAE Market is approximately 4,290 EUR in the seller's favor, not counting the time saved on bilateral negotiation.
Illustrative figures based on the parameters entered. The actual net revenue depends on the effective matching price and the commission negotiated with the alternative broker. This does not constitute a price commitment or a matching guarantee.
Frequently asked questions from Delegated Subjects
What do I need to register as a Delegated Subject?
You must appear in the official registry of Delegated Subjects published by MITECO in accordance with Art. 5 of Real Decreto 36/2023. Registration on the CAE Market requires the SD code granted by MITECO, the company NIF, the certificate of registration in the Registry and the legal representative's eIDAS electronic signature. The CertificAhorro team cross-checks this data against the public registry before activating operational access.
When can I publish an order after receiving the CAE?
You can publish an order as soon as the CAE appears in your name in the National Registry. The favorable resolution from the Gestor Autonómico and effective registration in the MITECO Registry are sufficient. The platform verifies that the Registry identifier is valid, not expired and free of encumbrances before authorizing publication.
Can I withdraw a published order?
Yes. As long as there is no matching proposal confirmed by an Obligated Subject, you can withdraw or change the price of your order with no penalty. Once matching is confirmed and the contract sent for signature, withdrawal is only possible by express agreement between the parties or by an unfavorable resolution of a documentary control.
How is the floor price of my order set?
You decide it freely as the seller. The platform shows you the weighted average price of the last 24 hours and the observed 2026 range (115 - 140 EUR/MWh) as a reference, but does not impose a floor price. The 2025 FNEE ceiling price published by MITECO (189.17 EUR/MWh) caps the theoretical market maximum because above it Obligated Subjects prefer to pay the penalty.
What happens if the buyer does not confirm the contract?
Contracts are sent for eIDAS signature after matching with a typical 48-hour deadline. If the buyer does not sign within that period, the proposal automatically expires and your order returns to the book with no penalty for you. Cases of repeated non-confirmation by an Obligated Subject are reviewed by the CAE Market compliance team.
Who handles the transmission before MITECO?
It is you, as the seller, who files the transmission request on the MITECO Electronic Office within a maximum of 5 business days from contract signature, in accordance with the official National Registry procedure. The platform automatically generates the transmission form with the contractual data and provides you with the tracking link on the office.
In what format do I receive the commission invoice?
After contract signature (CONTRACT_SIGNED), HM Capital SARL automatically issues a seller invoice with reference MKT-S-YYYY-XXXXX in PDF and XML Facturae 3.2.2 format in accordance with Ley 18/2022 Crea y Crece. The invoice carries the reverse charge mention (intra-Community B2B reverse charge) and you self-assess the IVA 21 % on the modelo 303.
When is the payment considered effective?
The CAE SEPA payment is made directly between the buyer and you according to the bank details exchanged on the platform. CertificAhorro does not act as escrow. The estimated timeframe from contract signature to receipt of the SEPA on your account is 5 to 8 business days, depending on the timing of the MITECO transmission and the SEPA cycle of the buyer's bank.
Security for Delegated Subjects
Mandatory KYC on the buyer, 150 % penalty clause on the intermediation chain, contracts with eIDAS signature, automatic freezing of the CAE during the MITECO transmission and an immutable audit log.
Monetize your CAE portfolio without opaque intermediaries
We are admitting MITECO-accredited Delegated Subjects to the closed beta while we consolidate the order book. Request an invitation to publish your first sell orders with real contracts and prices.
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