The best electricity tariffs in August 2025: Which one works best for you this summer?

Remember:

• Prices shown do not include taxes (VAT, electricity tax, etc.).
• The 50 discounted hours are automatically selected based on your actual consumption —you don’t need to do anything.
• The Tu Casa 50 – 12-month tariff includes an additional 30% discount: 10% for contract commitment, 10% promotional annual discount, and 10% extra through 30 November.

Which electricity tariff should I choose this summer? 

Let’s explore three different scenarios: 

• If you spend most of the day at home, especially during the hottest hours, and rely heavily on air conditioning:
  The Endesa Conecta tariff is your best option. Its stable 24/7 tariff lets you use your appliances without worrying about time-of-use charges or unexpected bill spikes.
• If your electricity usage is concentrated at specific times (evenings, nights, or weekends): The Tu Casa 50 tariff is ideal for you. Every month, a 50% discount will be automatically applied to your 50 peak usage hours —no effort required. This means that you’ll save exactly when you need it most.
• If you’re looking for a tariff with extra benefits:
  The Tu Casa 50 – 12-month tariff rewards your loyalty. In addition to the hourly discounts, you’ll get extra savings for keeping the tariff for one year. Perfect if you want stability and better returns in the medium term!

Is it better to choose a fixed or variable tariff in summer?

In summer, a fixed tariff is usually the smartest choice. It gives you control over your energy spending —no surprises on your bill, as well as no need to shift your routines around time-of-use schedules. Variable tariffs may offer lower prices during off-peak hours. However, they require constant monitoring and planning, which can be less practical during the schedule changes of summertime.

Tips to save on your electricity bill this August 

• Use your AC in ‘ECO’ mode and set it to 24°C.
• Take advantage of off-peak hours for laundry, cooking, or ironing.
• Review your contracted power —if it’s higher than you need, you’re overpaying.
• Sign up for a tariff with automatic discounts like Tu Casa 50 or its 12-month version. 

When is the best time to switch tariffs? 

August is the perfect time! This month offers the ideal opportunity to review your electricity contract and make the switch, thanks to several advantages:

• With less activity in customer service channels, the sign-up process is usually quicker and without waiting times.
• Many companies, including Endesa, launch special summer promotions for customers who switch or sign up for the first time.
• Plus, since you’re likely spending more time at home, you can better monitor your actual consumption and choose the tariff that best fits your daily habits.

Taking advantage of these conditions can make a big difference on your bill during the hottest months.

What if I’m under contract?

If your current tariff includes a long-term commitment, review the conditions. Some penalties are low, so switching may still be worth it. Endesa Conecta and Tu Casa 50 come with no long-term commitment, giving you complete freedom. While the Tu Casa 50 – 12-month plan does require a one-year contract, you’ll get additional discounts in return. 

Which tariff works best if I use air conditioning? 

In this case, the Endesa Conecta Tariff is your best choice. It’s ideal for households with AC, as it offers a stable 24/7 price. This way, you can use it whenever you need without worrying about time-of-use charges. 

What’s the difference between stable and time-of-use tariffs? 

 When choosing an electricity tariff, it’s important to understand how pricing is structured. At Endesa, you can go for a stable tariff (e.g., Endesa Conecta) or a time-of-use tariff (e.g., Tu Casa 50). Both have advantages but are designed for different usage profiles.

• Stable tariff (Endesa Conecta): The price per kWh is fixed all day long, offering simplicity and predictability. You don’t need to watch the clock or change your habits. So, it’s ideal if you want a sense of security and clear control over your bill. The drawback? You won’t benefit from lower off-peak pricing.
• Time-of-use tariff (Tu Casa 50): The price changes depending on when you consume energy. In this case, a 50% discount is automatically applied to your 50 peak usage hours each month. This allows for significant savings if you concentrate your consumption at certain times. Key aspects to consider: You need to know your energy habits to make the most of it.

Expert advice 

At Endesa, we’re here to help you choose the tariff that best suits your needs.

This summer, tariffs with automatic discounts like Tu Casa 50 are an excellent option for those who concentrate their consumption at specific times of the day. If you prefer peace of mind and predictability, Endesa Conecta gives you a stable price 24/7 with no long-term commitment. And if you’re open to a one-year contract, Tu Casa 50 – 12 months rewards you with an additional 30% savings on your peak consumption hours.

Still not sure? Our team of energy advisers is available to help you compare, understand, and choose the tariff that truly works best for you!