New customer bonuses: compare the first year and later costs separately

Three questions about every bonus

How much is the discount at your consumption level? When is it credited? What conditions apply, such as new customer status or contract length? E-Control explains comparisons with and without switching discounts. Write down the answers before counting a bonus as a definite saving.

Bonus and later costs: a worked example

This calculation uses fictional tariffs A and B for 2,500 kWh a year. Both have an annual energy standing charge of €60. A costs 15 cents/kWh with a one-off €100 bonus; B costs 14 cents/kWh without a bonus. All amounts use the same tax basis. Network charges and other levies are excluded.

Apply the method to actual price lists

A is cheaper in the first year; B is cheaper in the next year without a bonus. The two-year total assumes unchanged consumption and prices and full receipt of the bonus. Apply the method to current price lists, rather than using these example amounts for your home. Review the offer before the discount ends.

A reusable bonus check

Record four items for each offer: costs with the bonus, costs without it, eligibility conditions and credit date. Mark unconfirmed discounts as outstanding. A monthly average calculated from an annual price is not a promised instalment. The instalment guide explains how payments relate to actual annual costs.

Read the original sources

The factual information was checked against these sources. Checklists and labelled examples are our own presentation. Your supplier’s current documents govern your contract.

• E-Control: discounts in the tariff calculator