Deploy social tariff for electricity to help struggling households, urges Oxford policy brief
A new policy brief from the Smith School of Enterprise and the Environment, University of Oxford argues that UK electricity bills should be fairer, not just lower. It will urge the Government to implement a social electricity tariff to help low-income households struggling with their bills while the UK’s grid and energy systems are upgraded. A social tariff would make electricity more affordable for vulnerable households, either via a lower unit rate, or a discount on the total bill. Similar social tariffs have been implemented in Portugal and some US states.
“The electricity markets of today were designed to promote efficiency and competition, not social equity. As a result, affordability challenges must be addressed through policy instruments outside the market,” explains Dr Anupama Sen, Head of Policy Engagement at the Smith School of Enterprise and the Environment, University of Oxford.
The authors studied the causes of uneven costs across the UK, the Government’s current approach and its risks, as well as realistic ways to make bills fairer in the short term.
The Government dropped zonal pricing earlier this year and is designing a Reformed National Pricing Package (RNP) to keep uniform prices while adding location-based incentives to protect investors and keep costs low. But the policy brief’s authors argue that market reform proposals could disproportionately affect low-income and rural households, exacerbating existing inequalities. Low-income and vulnerable households that rely on uninterrupted electricity for medical devices, cooling, or heating could be particularly impacted.
Households already experience uneven retail electricity bills across the UK, with up to 15% difference by geographic location, and another 22% due to the choice of payment method or contract, the brief shows.
“To prevent the widening of existing inequalities, the government must ensure that electricity market reforms are accompanied by robust, equity-focused policies designed to protect those households that are least able to adapt to changes in price,” explains lead author Cassandra Etter-Wenzel. The authors review case studies from other countries including Portugal, which they credit with supporting universal access to energy at affordable prices by implementing social tariffs.
“A social tariff for electricity, like those implemented in Portugal and in some US states, could shield vulnerable households from rate increases as the Government makes vital upgrades and changes to our electricity system. It would also help to reduce the regional and structural disparities in UK electricity pricing – those arising from both geography and payment methods,” says Dr Anupama Sen.
The analysis also shows which parts of the UK could see higher electricity prices during the transition to clean energy. It finds that London boroughs like Tower Hamlets are particularly vulnerable because household incomes are low, urban electricity demand is high, and there is little capacity for local solar or wind farms. However, other regions of the UK could be better off during the transition. In 2025 for example, estimated electricity bills in Wales were up to 15% higher than the equivalent household in London. But the analysis shows that while household income is also lower in Wales, grid constraint intensity is relatively lower - meaning that renewable electricity could potentially lead to lower bills compared to other regions.
Sam Fankhauser, Professor of Climate Policy and Interim Director of the Oxford Smith School, comments:
“Household energy bills are a key sticking point on the UK’s path to net zero. Longterm, our research shows renewables can bring these costs down. But in the short term, social tariffs will provide immediate, targeted and impactful discounts to people that need them most, giving the Government political room to make the grid upgrades we need for a clean energy future.”
