“Significant rises to non-energy charges to start hitting consumers from October this year”

The UK energy landscape is undergoing a seismic shift as three major cost components — BSUoS, TNUoS, and the Nuclear RAB Levy are all increasing significantly— you need to prepare for these changes as they will impact the cost of your energy from October this year. Here’s is a high-level snapshot of what’s coming, when, and how it affects you:

BSUoS Charges – Balancing the Grid, at a Higher Price

  • BSUoS stands for Balancing Services Use of System. It is a charge set by the UK’s National Energy System Operator (NESO) to recover the cost of keeping the electricity grid stable and secure.
  • New Rate: £15.69/MWh (up from £10.74/MWh)
  • Effective Date: 1 October 2025 – 31 March 2026
  • Impact: A 46% increase in grid balancing costs during winter. Businesses on pass-through contracts could see thousands added to their bills.

Site spending £1M pa with 1000kVA availability will see a rise in its annualised costs of (+1.9%) c£19,263 from £60,207 to £79,471.

TNUoS Charges – Powering the Future Grid

  • The TCR Fixed Band Charging which was only introduced in 2023 is set to rise significantly due to the financial requirement of the UK grid doubling to £8.9bn
  • Impact: 1st April 2026 – 31st March 27 Forecast:

The current forecast is for TNUoS fixed charges to rise by over 100% from April 26 and increasing by nearly 300% in 2029/30.

Site spending £1M pa with 1000kVA availability will see a rise in its annualised costs of c£30,565  (+3%) from £22,922 to £53,486 per year, (continuing to rise and reaching £83,036 per year by 2029/30).

Note: For larger customer with EHV (Extra High Voltage) connections the rises will be significantly higher.

  • Draft Tariffs to be Published: 30 November 2025
  • Final Tariffs to be Confirmed: 31 January 2026

Nuclear RAB Levy – Funding the Next Generation of Clean Energy

  • The Nuclear RAB Levy is a financing mechanism designed to provide large scale infrastructure projects such as Nuclear Power with a predictable revenue stream during the construction and operational phases of the project via consumers energy bills.
  • Effective Date: 1st November 2025
  • New Charges Introduced:
    • Interim Levy Rate (ILR): £3.455/MWh
    • Operational Costs Levy (OCL): £0.0028/MWh
  • Impact: From 1st November 2025

Site spending £1M pa with 1000kVA availability will see a new tariff element which will increase bills by (+1.8%) c£18,175 per annum.

  • Exemptions:
    • Businesses qualifying under the Energy Intensive Industries (EII) scheme are 100% exempt
    • Eligibility based on sector and electricity intensity

Summary

These changes mark a pivotal moment in the UK’s journey toward a net-zero future, with significant implications for energy budgeting, procurement strategies, and sustainability planning.

In summary a site spending £1M pa with 1000kVA availability will see an increase in bills equating to c£68,003 (+6.8%).

These increases may be applied on a pro-rata basis, either upward or downward, depending on the size of your energy spend — except for EHV sites, where a bespoke analysis is required.

Now is the time to rethink your business energy strategy.

Let’s understand together what these changes mean for your organisation. There are options and solutions available. Noveus Energy is bringing new dynamism to the energy market – backed by transparent fees, true innovation and bespoke solutions that put your real needs first – we excel where other consultants simply do not deliver. Let’s start a conversation – click here to contact us.