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  • Industry information
  • Charging

Charging guidance

On this page you will find guidance materials to help you understand how, when and what you'll be charged. 

Would you like to get involved?

Join our mailing list to receive invitations to our forums, webinars and workshops, and links to our latest guidance materials.

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Charging guidance documents and webinars

CUSC Methodology

The methodology we use to set tariffs and calculate charges is in the Connection and Use of System Code (CUSC), Section 14. 

Connection and Use of System Code
TNUoS guidanceBSUoS guidanceConnection charging guidanceAAHEDC guidanceGeneral charging guidance

TNUoS guidance

Published Sort ascending Name
12 Jul 2019TNUoS tariffs for suppliers (includes link to recorded webinar)
3 Jun 2019What are Transmission Losses?
4 Apr 2019TNUoS charges for generators
20 Dec 2018TNUoS for offshore generators and the OFTO regime
13 Dec 2018TNUoS for new suppliers
7 Nov 2018What are Triads?
7 Nov 2018TNUoS charging and billing timeline
31 Oct 2018TNUoS in 10 minutes
8

BSUoS guidance

Published Sort ascending Name
26 Jul 2019BSUoS data sources
1

Connection charging guidance

Published Sort ascending Name
30 Mar 2020Connections charges - Application Fee Calculator (2020/21)
21 Oct 2019Connections charges - Annual Charge Modeller
17 Jul 2019A guide to Termination Amounts
15 May 2019Connections charges - annual charge and app fee calculator
4

AAHEDC guidance

Published Sort ascending Name
11 Dec 2018A guide to AAHEDC charges
1

General charging guidance

Published Sort ascending Name
15 Feb 2019Basic overview of our electricity charges
7 Nov 2018What are Triads?
2
2019 Forum materials2018 Forum materials

2019 Forum materials

Name Sort descending
Charging Forum - Glossary of terms
Charging Forum - Questions and Answers
Connections charges - Annual Charge Modeller
TNUoS Wider Tariffs handout
Transmission Charging Forum Demand-focused Day Slides 16 October 2019
Transmission Charging Forum Generation-focused Day Slides 17 October 2019
Workshop slides - Connection Charges Explained
Workshop slides - Forecasting performance variation (FPVAR)
Workshop slides - How and why we reconcile your TNUoS charges (demand)
Workshop slides - How and why we reconcile your TNUoS charges (generation)
Workshop slides - Ways to reconcile your BSUoS charges
Workshop tool - Demand reconciliation calculator
Workshop tool - Forecasting performance variation (FPVAR) calculator
Workshop tool - Generation reconciliation calculator
14

2018 Forum materials

Below are a selection of webinars, these share the same content that was discussed and shared at our Charging and Settlements forums in October 2018.

Published Sort ascending Name
8 Aug 2019TNUoS charging and billing (includes link to recorded webinar)
8 Aug 2019BSUoS billing (includes link to recorded webinar)
8 Aug 2019TNUoS tariffs and forecasting (includes link to recorded webinar)
8 Aug 2019BSUoS reporting and forecasting (includes link to recorded webinar)
24 Oct 2018Your questions answered - from the October 2018 Forums
18 Oct 2018Charging and Settlement Forum Demand-focused Day Slides 16 October 2018
18 Oct 2018Charging and Settlement Forum Generation-focused Day Slides 17 October 2018
7
A group of people discussing paperwork

Charging policy developments

Includes open letter consultations and guidance, charging methodology policy decisions, electricity industry information guides, and Triads data.

Find out more

Two National Grid representatives looking at a span of computer screens

Charging statements

TNUoS recovers the cost of installing and maintaining the transmission system. These charges apply to suppliers and generators.

Find out more

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