A complete expat guide to switching natural gas supplier (gas natural) and ordering bottled butane (bombona de butano) in Spain — TUR regulated tariff, free-market deals, Repsol and Cepsa bottle prices, and the CNMC portability rules that protect you.
Gas in Spain is a two-headed beast. If you have piped natural gas (gas natural), you're inside a tightly regulated market run by Naturgy, Endesa, Iberdrola, Repsol and a swarm of free-market sellers. If you don't, you're in butano country — the orange bottles you see strapped to building façades and clattering onto delivery trucks at 7am.
This guide walks you through both. We'll cover the TUR (Tarifa de Último Recurso) regulated tariff and when it beats the free market, how natural gas "portability" works under CNMC rules, the weekly bombona de butano price set in the BOE and what Repsol Butano and Cepsa Gas actually charge, plus the common sales tactics suppliers use to lock you into long contracts. By the end you'll know exactly how to switch — or whether to stay put — and how all this ties back to your home insurance.
Coming from the UK, Ireland, the US or Australia, the Spanish gas market has quirks that catch every expat out at least once.
First, most Spanish homes don't have piped natural gas at all. Outside major cities and newer developments, gas means a 12.5 kg orange bottle of butane — the bombona — used for cooking, water heaters and sometimes portable space heaters. Coastal towns, rural Andalucía, much of Galicia and most of the islands run almost entirely on butano and propano. Mainland inland cities — Madrid, Barcelona, Zaragoza, Valencia, Bilbao — have widespread piped gas natural.
Second, Spain operates a dual gas market just like its electricity market. The regulated tariff is called TUR — Tarifa de Último Recurso — set by the government and revised every three months. The free market is open to any licensed supplier with whatever prices, terms and contract lengths they can sell. Both run on the same pipes, the same meters and the same emergency services.
The whole market is overseen by the Comisión Nacional de los Mercados y la Competencia (CNMC), which sets switching rules, polices pricing transparency and protects your right to change supplier free of charge. The Instituto para la Diversificación y Ahorro de la Energía (IDAE) publishes consumption benchmarks, and the Boletín Oficial del Estado (BOE) publishes both the quarterly TUR resolution and the fortnightly maximum butane bottle price.
Three things to know up front:
Six fundamentals every expat needs before signing a gas contract or ordering a bottle.
TUR is the government-regulated tariff revised every quarter and published in the BOE. Free-market deals lock in a price for 12–24 months. TUR is open-ended and capped to households under 15,000 kWh/year — typically the best option for low-consumption flats.
Switching gas supplier is free, doesn't interrupt supply, and you don't have to contact your old supplier. The new one handles everything. Typical switching time is 15–21 days. This is a statutory right, not a courtesy.
Spain classes natural gas users into three domestic bands: RL.1 (under 5,000 kWh/year), RL.2 (5,000–15,000) and RL.3 (15,000–50,000). RL.1 and RL.2 households can choose TUR. RL.3 cannot.
The 12.5 kg orange bottle. Price is set fortnightly by the BOE and capped — Repsol Butano and Cepsa Gas can't legally charge more. Around €17–€20 depending on the period and Brent crude movements.
Most free-market gas contracts include cláusulas de permanencia of 12–24 months. Leaving early triggers €30–€60 penalty per remaining year. TUR has no permanence — leave any time, no fee.
An annual one-off payment to vulnerable households to help with heating costs, paid directly into your bank. It applies to households who already qualify for the Bono Social de Electricidad, regardless of whether they heat with gas, butane or electricity.
Whether you've just moved into a flat with a Naturgy contract you didn't sign or you're paying €20 a bottle in a Galician village, this guide is built for you.
Sorting gas, electricity and water? Don't forget home insurance — it's required for most Spanish mortgages.
Get a Home Insurance Quote →The most important decision a natural gas user makes. Get it right and you'll save €100–€300 a year on a typical flat.
The TUR (Tarifa de Último Recurso) is set every three months by the Spanish government and published as a ministerial resolution in the BOE. The price covers a fixed monthly standing charge (término fijo) plus a kWh rate (término variable). It's offered by a short list of state-designated "comercializadoras de último recurso" — currently Naturgy (under the Régsiti brand), Endesa, Iberdrola Clientes (under Curenergía) and a few smaller players.
The free market is everyone else — the same big names but operating under their commercial arms, plus independents like Holaluz, Octopus Energy España, Pepenergy, Imagina Energía and Lucera. Free-market contracts typically run 12 or 24 months, often start with a fat first-year discount that quietly disappears at renewal, and almost always include a permanence clause.
| Feature | TUR (Regulated) | Free Market |
|---|---|---|
| Who can offer it | Designated reference suppliers only | Any licensed commercialiser |
| Price stability | Reset every 3 months | Fixed 12–24 months |
| Contract duration | Open-ended, leave anytime | Permanence clauses common |
| Eligibility | Only RL.1 & RL.2 (under 15,000 kWh/yr) | Any consumer |
| Bono Social Térmico | Yes, if eligible | Yes, if eligible |
| Best for | Low-consumption flats, holiday homes | Large homes, predictable budgeting |
If you consume less than 5,000 kWh/year — typical of a city flat using gas only for hot water and cooking — TUR almost always wins. The free-market discounts rarely outweigh the regulated tariff's lower term fijo. Switch to TUR, set a reminder for 18 months later, and check again.
A factura de gas natural follows the same template as your electricity bill but with different line items. Here's how to decode it.
Working top to bottom you'll typically see:
Your meter reads in cubic metres (m³). Your bill charges in kWh. The supplier multiplies your m³ by a "factor de conversión" (around 11.7–11.9) to get kWh. The factor is on every bill — if it suddenly jumps, query it. One Naturgy billing error in 2023 affected thousands of households.
Whether you've inherited a contract, just moved in or are connecting a property to mains gas for the first time, the process varies.
If the property has an active supply (alta) you just change the titular. If the gas has been disconnected (baja) for more than 5 years, or if there's no installation at all, you'll need a full revisión by an authorised gas installer and a new Certificado de Instalación (the gas equivalent of a Boletín). That can cost €150–€400 and take 30–45 working days.
To change the titular on an active gas supply you'll need:
The process:
Whether you heat with gas or butane, your home insurance must reflect the actual installation. We can sort it the same day.
Get a Home Insurance Quote →Naturgy, Endesa, Iberdrola, Repsol and TotalEnergies dominate the natural gas market. Here's how they stack up.
Naturgy — historically Spain's national gas company (formerly Gas Natural Fenosa). They own the largest distribution network through Nedgia and remain the default for most Spanish households. Strong app and Spanish-language customer service; English availability is patchy outside major cities.
Endesa — the historic electricity incumbent in Catalonia, Andalucía and the Balearics. Dual-fuel discounts when you combine gas with their One Luz electricity tariffs. Tempo Happy gives you two free hours daily — sometimes useful for the boiler.
Iberdrola — strong on electricity, more competitive than ever on gas since launching Plan Estable Gas. English-speaking customer service line. Often runs 12-month dual-fuel discounts.
Repsol — entered the residential gas market aggressively in 2018 with discounts at Repsol service stations. Worth a look if you drive a lot or have a Solred fuel card.
TotalEnergies — bought EDP's residential book and competes with sharp first-year discounts. Strong digital experience and email-only billing.
Beyond the big five, Holaluz, Octopus Energy España, Pepenergy and Imagina Energía sometimes undercut the majors. Always compare against your own last 12 months of kWh, never a generic "average household". The CNMC publishes a free Comparador de Ofertas — use it before you sign anything.
Spanish gas suppliers run the same playbook as their electricity arms — and a few extras specific to gas.
Switching gas supplier is your statutory right under CNMC portability rules. Here's how it works in practice.
The CNMC guarantees that switching natural gas supplier:
The only catch is the cláusula de permanencia. If you signed a 24-month free-market deal six months ago, leaving now triggers a penalty of roughly €30–€60 per remaining year of contract. TUR has no permanence — leave any time, no fee. Always check the permanence clause before signing anything new.
Step-by-step to switch:
If you're switching away from a free-market deal mid-permanence, the penalty is normally added to your final bill, not invoiced separately. Suppliers sometimes try to discourage switching by quoting an inflated penalty — challenge it in writing if it exceeds €60 per remaining year.
If you signed up over the phone or online, you have 14 calendar days to cancel under Spanish consumer law (desistimiento). The supplier must give you a written cancellation form. If you've been mis-sold, complain in writing within those 14 days — and copy in the CNMC if you don't get a response within a month.
No piped gas? Welcome to bombona country. The orange 12.5 kg butane bottle is one of Spain's most familiar sights — and one of its most regulated products.
The maximum retail price of the standard 12.5 kg butane bottle is set by the Spanish government and revised every two months. The resolution is published in the BOE and tracks Brent crude movements and shipping costs. Recent prices have ranged from €15 to €20 per bottle.
Two players dominate the market:
Repsol Butano — the largest distributor, with a national doorstep delivery network. You can order online, by phone (901 100 100) or just stop the delivery van when you hear the doorbell-ringing routine in your street. Bottles must be exchanged on a 1-for-1 basis once you've paid the original cash deposit (around €15) for your first one.
Cepsa Gas — the main rival, also nationwide but with stronger coverage in parts of Andalucía, Murcia and the Valencian Community. Bottles are interchangeable between distributors at most service stations but not for doorstep delivery — your delivery driver only takes back his own brand.
How the BOE price cap works — the published price is a maximum. Service stations, hardware stores and ferreterías can legally sell below it but never above. Doorstep delivery often costs €1–€2 above the headline because suppliers charge a "porte" (delivery surcharge) which is capped separately. Always check the receipt.
| Where you buy | Typical price | Notes |
|---|---|---|
| Doorstep delivery (Repsol/Cepsa) | BOE max + porte | Most convenient, slightly pricier |
| Service station | BOE max or below | Cheaper but you carry the bottle yourself |
| Local hardware store | BOE max or below | Independents often discount in summer |
| Supermarket forecourt | BOE max or below | Carrefour, Eroski and some Mercadonas stock them |
Scheduling doorstep delivery — both Repsol Butano and Cepsa let you book a recurring delivery online (every 2, 4 or 8 weeks). You can cancel any time, there's no contract, and you only pay for the bottles you take. For a couple using butano only for cooking, one bottle every 6 weeks is typical; with a butane water heater plus cooking, you'll burn through one every 2–3 weeks in winter.
If you have a fixed butane installation (a bottle in a kitchen cupboard plumbed to the cooker or water heater), it must be inspected every 5 years by an authorised installer. The certificate is required if you ever sell the property, and your insurer can refuse a fire claim without it.
If you qualify for the Bono Social de Electricidad, you automatically receive an annual heating-cost payment under the Bono Social Térmico.
The Bono Social Térmico is a single annual payment from central government to households who already qualify for the Bono Social de Electricidad. It applies regardless of whether you heat with gas, butane, electricity or oil — you don't need a gas contract to claim it. The amount varies by climate zone and household vulnerability, ranging from around €40 to €375 a year, and is paid into the same bank account as your Bono Social discount.
You don't apply separately — once you have the electricity Bono Social, the gas payment is added automatically by the autonomous community where you live.
To qualify for the underlying Bono Social you must fit one of:
Apply through any reference supplier that offers TUR. Submit income certificates, the libro de familia, and disability or pension documents. The Bono Social must be renewed every 2 years. Regions and town halls offer further heating subsidies — check with your local ayuntamiento and the IDAE, which administers a national fund for replacing old butane heaters with heat pumps.
After helping thousands of expats navigate Spanish utility contracts, here are the six gas mistakes we see most often.
The questions expats ask us most often about Spanish gas supply, switching and bottled butane.
Yes — switching is a statutory right under CNMC rules and can't be blocked. However, if your current free-market contract has a permanence clause and you leave early, you'll pay a penalty of around €30–€60 per remaining year. TUR has no permanence, so if you're on TUR you can switch any day with zero penalty.
No. The gas keeps flowing throughout. The distributor (Nedgia, Madrileña Red de Gas, Redexis or Nortegas) doesn't change — only the commercial entity that bills you does. You'll get one final bill from the old supplier and one welcome bill from the new one.
The distribuidora owns the pipes, meters and emergency response. You can't choose them — they're set by region. The comercializadora is the supplier who sells you the gas; you can freely choose any of them. Your monthly bill comes from the comercializadora; emergencies (escapes, smells) are still handled by the distribuidora's 24-hour line.
The maximum price is the same — set by the BOE every two months. Below that cap, hardware stores and service stations can compete. The Canaries operate under a slightly different regime with a separate price cap that's usually lower.
If your street has a gas main, yes. You'll need a new connection (acometida) from the distributor — typically €120–€250 — plus an internal installation by an authorised gas installer, plus a Certificado de Instalación. Boiler and cooker conversion kits add €200–€500. Payback on running costs is typically 2–4 years for a heavy gas user, longer for a light one.
Because gas heating is by far the largest gas consumer in a Spanish home. A two-bed flat with central heating can easily burn 1,500 kWh/month in January versus 100 kWh/month in August. The cure isn't switching supplier — it's better insulation, programmable thermostats and lower boiler flow temperatures.
No. Dual-fuel discounts exist but are rarely worth more than €30–€50 a year combined. Compare each separately — your best gas supplier is often not your best electricity supplier.
Insurers want to see a valid gas safety inspection certificate (revisión obligatoria) every 5 years for both piped and fixed butane installations. Without it, fire and explosion claims involving gas can be denied. If you have a portable butane heater, declare it — some insurers exclude undeclared portable heating from cover. Always check your policy wording or ask us to check it for you.
Sorting your gas supply and tariff is one piece of the puzzle. The other is making sure your home — and the contents inside it — are insured by a Spanish-regulated insurer who will pay out without arguing about translation, paperwork or jurisdiction. 247 Expat Insurance arranges DGSFP-regulated home insurance for expats across mainland Spain, the Balearics and the Canaries.
Get a Home Insurance QuoteWe arrange Spanish home, health, car and life insurance for British, Irish, American, Australian, Canadian and South African expats living in Spain. Every policy is issued by an insurer regulated by the Dirección General de Seguros y Fondos de Pensiones — Spain's national insurance regulator — so claims are paid under Spanish law, in Spain, by a Spanish entity. No grey-area UK policies that may not respond to a Spanish loss.
