A lower electricity bill does not depend solely on using less energy. Contracted capacity, the tariff structure, additional services and renewal conditions also matter. It is worth understanding your bill before accepting an offer.
Separate the components of the bill
Find the cost of the energy used, the capacity charge, taxes, meter rental and any extra services. The CNMC’s “Understand your bill” guide explains these elements and lets you check your contract details. Do not confuse a temporary discount with a stable final price.
Check whether you are in the regulated or free market, when the contract renews, whether there is a minimum-term commitment and which services are charged separately. Keep the conditions you are offered: a sales conversation does not replace the contract.
Use your actual consumption
Gather several bills to distinguish seasonality from a trend. Heating, air conditioning or a prolonged absence can make an isolated month unrepresentative.
Review the maximum capacity demanded shown on the bill or in the distributor’s online area. Reducing capacity can save part of the fixed charge, but insufficient capacity can cause interruptions. Check simultaneous needs and the cost of making the change.
Compare equivalent offers
The CNMC provides an official comparison tool. Enter real data and compare the estimated annual cost, not just the price for one period. Check the length of the discount, minimum term, price reviews and linked services.
Be wary of guaranteed savings figures: the result depends on the contract, property, climate and habits. IDAE brings together recommendations for households, but the priority is to avoid unnecessary consumption without compromising comfort, health or safety.
Before switching, identify the tariff and renewal date; review several months; check capacity and extras; compare the annual cost; read the penalties; keep the offer and confirm the first new bill.
Comparing successive bills is more reliable than judging just one. Kinset can keep them together and show the changes so you can assess the switch using the complete history.
This article is educational and does not constitute personalised advice on choosing a contract.