What is the best SEG export rate?

On the baseline in this file the highest rate open to anyone, whoever supplies your import, is 12p per kWh, against a median of about 4.1p among open untied tariffs. These are baseline figures for the scheme year named, not live quotes, so check the supplier's own current terms before switching.

What does tied mean on an export tariff?

That the tariff is only available if you also buy your electricity from that supplier. Untied tariffs are open to anyone. Tied rates are often higher, which is a real offer and also a reason to check what the import side costs before treating the export rate as free money.

Can I download the SEG tariff data?

Yes. Ofgem's annual report is Open Government Licence material, so we republish it as a CSV with attribution rather than summarising it. Fifty tariffs, eleven columns, no sign-up.

Are these rates current?

Treat them as a baseline, not a quote. Every row carries an origin column: ofgem-annual means the rate is accurate as Ofgem published it for the scheme year, and rows checked against a supplier's own current terms are marked differently with the date they were checked.

What is a variable tariff mechanism?

Ofgem annotates variable tariffs with how the rate moves — at the supplier's own review, or tracking an external index. A tariff that tracks an index is a different proposition from one a supplier resets when it chooses, and the file says which.

Every Smart Export Guarantee tariff

All 50 SEG tariffs Ofgem recorded for the scheme year, with the rate, whether it is tied to taking your import from the same supplier, and what makes a variable rate move. As a file, not a lead-generation form.

Fifty tariffs, as published, as a file.

Supplier, legal entity, tariff name, rate, tied or untied, rate type, what makes a variable rate move, and the dates it ran. Open Government Licence, so you can use it for anything.

Download

UK Smart Export Guarantee export tariffs

50 tariffs — supplier, legal entity, tariff, tied or untied, rate in pence per kWh, rate type, variable mechanism, start and end dates, origin and the date we last verified the row.

Download the CSV · 8 kB · Open Government Licence v3.0

Credit as: Contains public sector information licensed under the Open Government Licence v3.0. Compiled by solar.org.uk from Ofgem’s Smart Export Guarantee Annual Report.

What it shows

Open untied SEG export ratesAll 19 tariffs open to anyone, whoever supplies your import.

Baseline figures as Ofgem published them for the scheme year named. Not current quotes — check the supplier’s own terms before switching.

pence per kWh. Source: Ofgem, Smart Export Guarantee Annual Report — SEG Year 5, 1 April 2024 to 31 March 2025 · OGL v3.0. The figures · download the data.

The spread is the story. Among tariffs open to anyone, the best rate in this file is twelve times the worst. Switching export supplier costs nothing but the paperwork, which makes it the cheapest lever available to anyone who already has panels — and considerably cheaper than the battery usually proposed instead.

Columns

Column	What it is
`supplier`	The trading name
`supplier_legal_entity`	The licensed entity, where it differs — some suppliers hold several
`tariff`	The tariff name as Ofgem records it
`tied_or_untied`	`tied` means available only to the supplier’s own import customers
`rate_p_per_kwh`	Rate in pence per kWh
`rate_type`	`fixed` or `variable`
`variable_mechanism`	Ofgem’s own annotation: `supplier review` or `external index`
`started`, `ended`	Dates the tariff ran. `ended` is empty where it was still offered
`origin`	`ofgem-annual` for a baseline row; otherwise how the row was checked
`verified`	The date the row was last checked

Read the origin column

This matters more than any single rate.

A row with origin ofgem-annual is accurate as Ofgem published it for the scheme year named in the file header, and is explicitly not a current quote. Rows checked against a supplier’s own current terms carry a different origin and the date of that check.

We label it this way rather than quietly presenting everything as live, because a tariff table that looks current and is not is worse than one that admits its age.

How it was made

scripts/data/build-seg-baseline.py reads Ofgem’s figures into data/seg-tariffs.yaml; scripts/data/build-downloads.py emits the CSV. A monitor watches Ofgem’s page for change and tells a person to go and read it — it does not parse a number and publish it under our name. A monitor that says “this page changed on Tuesday” costs ten minutes of someone’s attention and cannot be wrong about anything; a scraper that mis-parses a table publishes a wrong number with our byline on it. See how we work.

Sources

Smart Export Guarantee Annual Report — SEG Year 5 Ofgem · Accessed 15 August 2026 · OGL v3.0 Figure 2.1 (untied export tariffs) and Figure 2.2 (tied export tariffs), for the scheme year 1 April 2024 to 31 March 2025.

Contains public sector information licensed under the Open Government Licence v3.0.

Last verified: 23 August 2026 How we research this Suggest a correction

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