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Tariff One Gas + OKGas:
24-hour support

The One Gas + OKGas gas tariff combines a single price for the gas you consume, without surprises, with a maintenance service that includes boiler checks and protects you in case of breakdowns.

The One Gas + OKGas rate guarantees that your gas installation and equipment will always be in perfect condition. It includes:

  • An initial diagnosis.
  • Annual reviews.
  • Unlimited repairs.
  • It includes the cost of theMandatory Periodic Inspection (IPO, in its Spanish initials) of the gas installation.

You will receive all your bills by email, as soon as they are issued, faster than the postman can promise. You will have them at your disposal anytime, anywhere, you just need an internet connection to check your contracts and invoices from a computer, mobile phone, tablet, etc.

In case of an emergency breakdown, in less than 3 hours a specialised technician will be at your home. This service works every day of the year, at any time of the day.

The One Gas + OKGas gas rate has a competitive price with which you will have your gas bill controlled.



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In less than 3 hours

If the breakdown is urgent, we will be at your home in less than 3 hours.

Attention 24h

Permanent assistance: 24 hours a day, 365 days a year.

Extras Included

Includes call-out charge and three hours of labour for each repair.


Digital bill

You will receive all your bills by email as soon as they are emitted. Much faster than the postman.










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Frequently Asked Questions

Prices with taxes (*)

Tariff group Fixed term €/month Variable term €/kWh
3.1P 5,98950 €/month 0,063934 €/kWh
3.2P 10,58750 €/month 0,054556 €/kWh

(*) Includes hydrocarbon tax (gas - 0.00234 euros/kWh) and VAT (21%) has been applied to the resulting amount. The VAT must be replaced by the indirect tax corresponding in the Canary Islands (IGIC) and in Ceuta and Melilla (IPSI).

With the Endesa One Gas tariff you will have a fixed price and you can manage everything you need through the Internet. You will always be able to enjoy a competitive price, and not only during the first year. We offer you Endesa’s best online price.

  • One is a 100% online rate, so you can manage all your administrative tasks quickly and easily, 24 hours a day, in the “Customer Area” section within the online office or by downloading our mobile app.
  • You can contract only what you need, without the obligation of contracting an additional service but with the possibility of contracting one if you wish.
  • You have no commitment to remain.
  • You will receive an email indicating the date and the link through which you will be able to access your electronic bill when it becomes available.
  • With easy and simple contracting, without costs and without interruptions in your supply.
  • One rate for ALL customers, new and existing ones.

On this rate:

  • You’ll enjoy Endesa’s best online price.
  • You will be able to carry out all your administrative tasks 100% online.
  • There is no commitment to remain.

The Tarifa One Gas is valid for supplies with an access rate of 3.1 or 3.2.

Servicing the installation prevents, mainly, any possible gas leaks which would affect the safety of the inhabitants of the dwelling and, in addition, would mean an increase in energy consumption and the amount of bills.

Such inspections are of a preventive nature to check the condition, safety and correct operation of the gas installation and of the heating equipment (boiler, hydraulic circuit and radiators), in accordance with legal and technical regulations.

The heating circuit is the pipe routing through which the hot water runs from the boiler to each of the radiators. The most common faults occur in the circulation pump, the safety valve, the circuit pressure, the boiler fumes outlet, the temperature probe that checks whether the water is hot or the radiator taps.

During a technical inspection, the following is carried out:

  • A check of all the installation's components (taps, fastenings, pipes, nozzles, ventilation, etc.).
  • Necessary adjustments to guarantee the safety of the installation and, to the greatest extent possible, reduce the gas consumption, number of breakdowns or future failures of the equipment.
  • Checking for leaks in the gas installation.
  • Checking and adjusting the equipment’s operation.
  • Combustion analysis and submission of the result.
  • Mandatory Periodic Inspection of the gas installation.
  • Mandatory Regulations for Thermal Installations in Buildings (in Spanish, RITE) service.

The price may be updated on 1 January after contracting it, in accordance with the value of the real CPI (the latest general inter-annual Consumer Price Index officially published at the time of the update), as well as because of variations suffered by the current regulated components that are applicable to gas supplies, and with possible new changes that may be approved by law.

If there are changes in the price of your contract, they will be transferred on to the customer whether they go upward or downward. This type of modification is regulated and completely beyond Endesa’s control, applying equally to the entire country and to all companies.

In addition, the price may be reviewed one year after contracting. This would happen in April or October of each year. If there are any changes, we will let you know a month in advance. Remember that you can terminate the contract, or contract another rate from Endesa or any other company any time.


Terms of business

PDF (0.21MB) Download

General conditions of services

PDF (0.97MB) Download

One Gas rate conditions

PDF (0.27MB) Download

OKGas maintenance service

PDF (0.19MB) Download

Specific conditions for registering for fotofactura

PDF (0.07MB) Download

Conditions digital bill

PDF (0.09MB) Download

Promotion terms and conditions

PDF (0.46MB) Download

*The payment will be included in the gas bill covering 30 June 2021. €15 on the One Gas 3.1 tariff and €35 on the One Gas 3.2 tariff. This promotion is valid for electricity plus gas contracts and gas-only contracts, provided that the user is already an Endesa electricity customer. This promotion is valid until 26 April 2021. For more details, see the promotion terms and conditions.

By subscribing to this new contract you accept the start of the supply contracted during the cancellation period.

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