December is a critical month for UK businesses reviewing their energy contracts. As wholesale markets remain unpredictable and non-energy charges continue to rise, many companies are taking the opportunity to lock in competitive fixed-rate deals before entering 2026.
To support businesses in making informed decisions, we’ve launched two new resources: Compare Business Electricity and Compare Business Gas.
Below, we break down the latest electricity and gas prices for December, including the cheapest unit rates, average unit rates, and average standing charges across different business sizes.
Business Electricity Prices – December 2025
Electricity markets remain sensitive to fluctuations in renewable output, winter demand and wider wholesale volatility. This has kept average prices higher than long-term norms, making it essential for businesses to compare deals rather than rely on outdated tariffs or rollover rates.
December 2025 Electricity Price Comparison Table
| Business Size |
Annual Usage (kWh) |
Cheapest Electricity Rate (p/kWh) |
Average Electricity Rate (p/kWh) |
Average Standing Charge (p/day) |
| Micro business |
0 – 4,999 |
21.89p |
24.91p |
51.39p |
| Small business |
5,000 – 14,999 |
21.99p |
24.92p |
58.12p |
| Medium business |
15,000 – 24,999 |
21.99p |
24.90p |
58.12p |
| Large business |
25,000 – 49,999 |
21.43p |
24.42p |
90.28p |
| Very large business |
50,000+ |
Bespoke Pricing
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Bespoke Pricing
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Bespoke Pricing
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*Electricity prices shown are indicative December 2025 business rates.*
These figures highlight a significant difference between the cheapest available rates and average rates on the market. Businesses that compare suppliers regularly benefit the most – especially those currently on out-of-contract or rollover rates.
👉 Compare live electricity prices: https://www.wesave.co.uk/compare-business-electricity/
Business Gas Prices – December 2025
Business gas rates have shown more stability compared to electricity but continue to fluctuate due to storage levels, LNG supply and broader market pressures. For companies with high winter gas usage, December is a key time to secure a fixed contract.
| Business Size |
Annual Usage (kWh) |
Cheapest Gas Rate (p/kWh) |
Average Gas Rate (p/kWh) |
Average Standing Charge (p/day) |
| Micro business |
0 – 4,999 |
5.51p |
7.35p |
41.47p |
| Small business |
5,000 – 14,999 |
5.41p |
6.94p |
48.42p |
| Medium business |
15,000 – 24,999 |
5.29p |
6.79p |
59.33p |
| Large business |
25,000 – 49,999 |
4.85p |
6.73p |
87.12p |
| Very large business |
50,000+ |
Bespoke Pricing
|
Bespoke Pricing
|
Bespoke Pricing
|
*Gas prices shown are indicative December 2025 business rates.*
With average gas standing charges rising year-on-year, switching suppliers can offer meaningful savings – not only on unit rates but also on fixed daily costs.
👉 Compare live gas prices: https://www.wesave.co.uk/compare-business-gas/
What’s Driving December’s Business Energy Prices?
1. Wholesale volatility
Electricity remains affected by reduced renewable generation and higher winter demand. Gas prices fluctuate based on European storage levels and global LNG supply.
2. Rising non-energy charges
Network costs, environmental levies and supplier operating costs make up a growing share of business energy bills. Comparing standing charges is just as important as comparing unit rates.
3. No price cap for businesses
Commercial energy rates are unregulated, meaning every supplier sets their own prices. This creates large price variations between the cheapest and average tariffs.
Why December Is the Best Time to Compare Energy Prices
Many businesses unknowingly fall onto expensive deemed or rollover rates if they don’t act before their contract end date. December is one of the busiest and most advantageous times of year to switch, offering:
- Strong fixed-rate options ahead of winter
- Protection from future market increases
- Better budgeting for 2026
- Access to broker-exclusive tariffs
- Potential savings on both unit rates and standing charges
Switching is quick, and your supply will never be interrupted. All you need is your latest bill.
December Energy Checklist for UK Businesses
Before year-end, make sure you:
- Check your contract end date
- Review your usage and standing charges
- Compare electricity and gas prices using WeSave
- Consider fixing your rates for 12–36 months
- Avoid rollover rates by acting early
Final Thoughts
Business energy prices in December continue to reflect a challenging market, but the data clearly shows that comparing suppliers leads to substantial savings. With clear differences between the cheapest and average rates across electricity and gas, now is the ideal time for UK businesses to secure a competitive contract.
Start your comparison today and enter 2026 with confidence:
⚡ Compare Business Electricity: https://www.wesave.co.uk/compare-business-electricity/
🔥 Compare Business Gas: https://www.wesave.co.uk/compare-business-gas/