What is the Weighted Average Price (WAP) in energy?
In the UK energy market, Weighted Average Price (WAP) refers to the average price paid for electricity or gas over a period of time, weighted by the volume bought at each price point. For those on flexible energy contract, the WAP represents what the unit rate will be when multiple purchases were made for the same period.
In other words, it answers the question: “What did we actually pay for our energy once all purchases and volumes are taken into account?”
This makes WAP far more meaningful than a simple average, especially in volatile markets.
How WAP works in practice
Energy prices move constantly. Businesses, particularly those on:
often buy energy in multiple tranches at different times and prices. For example:
- 40% of energy bought at 10.0p/kWh
- 30% bought at 12.0p/kWh
- 30% bought at 9.0p/kWh
The WAP reflects the price-weighted impact of each purchase, giving a single unit rate that reflectsthe real cost exposure.
Why WAP matters to UK businesses
1. It reflects real procurement performance
WAP shows how effective your buying strategy has been, not just whether the market went up or down, but how your timing and volumes performed.
2. It’s essential for budgeting and forecasting
Using WAP allows businesses to:
- Accurately forecast energy spend
- Compare performance year-on-year
- Avoid misleading headline prices
This is especially important for manufacturers and high-consumption sites where small price differences materially impact costs.
WAP vs fixed prices
This means WAP can improve with smart market timing and deteriorate if exposure is unmanaged. For those on fixed contracts, it can be vital that portfolios are being managed by a person or group with experience and expertise in energy markets. Ultimately, the strategy of when and how much to buy is just as important as the market itself.
WAP as part of your purchasing strategy
Weighted Average Price is the truest reflection of what your business actually pays for energy. Understanding it is critical to controlling cost risk in volatile markets.
For larger SMEs and energy-intensive businesses, having a clear energy purchase strategy and having this strategy communicated through regular reporting can be vital for forecasting future energy costs.
If your business would like assistance with understanding the current state of your portfolio, or advice on purchasing and management strategies, contact us today to see how we can help lower your electricity and gas costs and help you See More of the hidden value in your energy portfolio.
