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Sienergy

Gas Online

Estimated bill

≈ €168.44 / month

Taxes included

Supplier share: €86.97/month, before taxes

Terms valid for 12 months

€2,021.33 / year

At 1,400 Smc/year

≈ 0.6512 €/Smc using average PSV 0.5012

Markup on the market price

Market +0.15€/Smc

Standing charge

€132/ year (€11.00 / month)

An amount covering the costs of commercial customer management (sales, assistance and billing), included in the energy/gas supply charge.

Annual usage × unit price + supplier standing charge + network charges, levies and taxes. For variable offers we use a shared PSV reference of 0.501205 €/Smc (12-month average, 2025-10/2026-09), which may differ from the contract’s index. Monthly spending is the annual estimate divided by 12, not a winter bill.

Estimates include network charges, system levies, excise and VAT. Supplier unit prices and standing charges are shown before these additions.

Availability & signup

  • Check availability at your supply address.

  • Check whether your activation or supplier change is eligible.

  • Confirm local availability, eligibility and activation terms with the seller.

Payment: Bank direct debit, Card direct debit, Pre-filled payment slip, Other methods

Signup channel: All channels

Sign up by Dec 31, 2026; this is not the price expiry date.

Offer terms

Full offer text

OFFER FOR HOUSEHOLD CUSTOMERS

Source & dates

Source accessed on Oct 31, 2026.

Offers current as of Nov 2, 2026.

Offer code: 027870GSVML02XX00000000GASONLINE

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