How 2026 TNUoS Increases Will Impact Your Business

From 2026, businesses should expect a noticeable increase in energy costs due to rising Transmission Network Use of System (TNUoS) charges. These charges, applied by National Grid to cover the cost of transporting electricity across the UK’s high-voltage transmission network, are set to increase significantly.

Why are the TNUoS costs increasing?

TNUoS charges help fund the maintenance and development of the electricity transmission system. As the UK transitions to low-carbon and decentralised energy sources, such as offshore wind and solar farms, the network requires significant upgrades to ensure a reliable electricity supply from generation to consumption.

To support this investment, the cost of using the transmission system is increasing, and that cost will be passed on to energy suppliers. However, because of this, suppliers are expected to reflect these high charges in customer bills, particularly for businesses.

Who will be affected?

TNUoS costs aren’t applied evenly across the country. They’re partially based on where a business is located, how far away it is from a generation hub and how much strain it puts on the transmission network.

This means businesses located further from generation hubs – CHECK WHERE – are likely to see the steepest increases. Those nearer to major generation points may see slight rises.

For multi-site businesses, or those operating in industrial clusters far from generation sites, it is important to understand.

The wider impact

Rising transmission charges don’t stop at energy bills. As businesses adjust to higher operating costs, there’s likely to be a ripple effect through supply chains, contributing to increased costs for goods and services across the economy.

For sectors with high energy demands—such as manufacturing, logistics, and food production—these increases could be particularly challenging.

What can you do now?

Although the changes take effect from 2026, it’s worth preparing early. Reviewing your current energy contract, exploring energy efficiency opportunities, or considering on-site generation could help mitigate the impact.

If you’re unsure how these changes will affect your business specifically, our energy experts are here to help. We’re supporting customers across the UK to understand and navigate these upcoming shifts in the energy landscape.

Call us today on 0191 303 7750 to find out how your business will be affected – alternatively, click here to book a call back.

Share this article