AAHEDC recovers costs for The North of Scotland which is currently the only area specified to receive assistance.

Who does this charge apply to?

We recover the assistance amount through a charge on all suppliers. This is passed on to Scottish Hydro Electric Power Distribution Ltd, so distribution charges in the North of Scotland can be reduced.

This replaces an earlier arrangement, commonly referred to as 'Hydro Benefit'.

Each year, the AAHEDC tariffs are published by 15 July and take effect from 1 April retrospectively.


Learn more About AAHEDC with our guidance document

A guide to the scheme implemented as part of the Energy Act 2004, and designed to reduce the cost of electricity distribution in ‘Specified Areas’.

Tariffs and charging statements

Tariffs and charging statements – archive

Rich text

These documents contain tariff details and charging statements.

Draft tariffs are issued in the middle of the year before final tariffs are decided.

Charging statements explain tariffs and how National Grid decides the

Additional help and support

Charging guidance

Access a range of guidance materials to help you understand how, when and what you’ll be charged.

Charging enquiries

Contact us directly to raise a query relating to TNUoS and our publications, or to provide feedback. Please note our usual contact number is currently unmanned due to COVID-19 homeworking.


Join our mailing list

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