What do I do if I don't get a Warm Home Discount letter?

That distinction matters when no letter turns up. A missing letter does not mean a missing entitlement, and it does not usually mean an application was overlooked, because in England and Wales no application was ever required. The qualifying date for winter 2026 to 2027 is 23 August 2026, and payments for that scheme year are made at any time from October 2026 to the end of March 2027³.

What follows sets out when the letter should arrive, why it may not have, who to contact, how the £150 reaches a household on a prepayment meter, and what happens if the supplier changes or stops trading.

The letter is a notification, not an application

The letter tells a household that the supplier has identified it as eligible, or that it may be eligible and further information is needed. Letters for the 2025 to 2026 scheme year were sent between October 2025 and January 2026 to households that met or possibly met the criteria⁸. National Energy Action's guidance is that a letter from the supplier arrives before January of the qualifying year if the household is eligible for the scheme or is being migrated onto it⁵.

The pattern is consistent across the winter payments. The Winter Fuel Payment letter arrives in October or November saying how much will be paid⁹. The Winter Heating Payment in Scotland is paid automatically with a letter sent before payment, and Social Security Scotland sends a letter or email telling the household it is coming². None of these letters is an application form.

Why the letter may not have arrived

The largest single reason is data matching. The Department for Energy Security and Net Zero estimated that 2.4 million households, some 28% of the 8.1 million people estimated eligible, might not be data matched¹⁰. Those households are entitled but not automatically identified, which is precisely the gap the letter is meant to close and precisely the gap that leaves people waiting. The scheme as a whole supports two and a half million low-income and vulnerable households¹¹.

Smaller suppliers may also limit how many broader group discounts they pay. The number of discounts paid by each supplier to broader group customers may be limited, and some smaller firms do not pay those who do not automatically qualify¹². A household with a supplier that caps its broader group, or that does not participate at all, may never receive a letter.

In Scotland the position differs. An application process still applies for those in Core Group 2, known as the Broader Group in Scotland⁵. A Scottish household in that group should not wait for a letter before acting.

Park home residents are a separate case again. Permanent residents of park homes who pay the site owner for their electricity must apply themselves rather than wait for an automatic discount³. The Park Homes Warm Home Discount scheme requires applicants to be a permanent resident of a park home, to pay the park site owner for electricity usage, and to be on a relevant qualifying benefit or demonstrate household income or fuel poverty criteria⁴. Applications are made each year and only one application per household is considered¹³.

Who qualifies: the core group and the broader group

Eligibility in England and Wales is built around two groups. Core Group 1 covers customers of participating suppliers where the person named on the energy bill, or their partner, receives the Guarantee Credit element of Pension Credit on the qualifying date for that scheme year¹³. Core Group 2 covers receipt of a qualifying means-tested benefit by the person named on the bill, or their partner or legal representative, on the qualifying date¹⁴.

The broader group, which applies in Scotland, includes low income households that are not part of the core group⁹. That is the group where an application process still applies, and where supplier caps bite hardest.

Three conditions run through all of it: the energy supplier must be part of the scheme, the household must receive certain means-tested benefits, and the name on the electricity bill must be the claimant or their partner⁷. To receive the discount automatically in winter 2026 to 2027, you or your partner must be named on the electricity bill by Sunday 23 August 2026⁹.

The scheme is large. It supports two and a half million low-income and vulnerable households¹¹. Claiming it does not affect eligibility for any other discounts or payments³. In England and Wales, Core Group 1 rests on receipt of the Guarantee Credit element of Pension Credit on the qualifying date, while Core Group 2 rests on receipt of a qualifying means-tested benefit, by the person named on the bill, their partner or a legal representative, on the qualifying date¹⁵. Scotland differs: the broader group covers low income households that are not part of the core group, and an application process still applies for those in Core Group 2, known there as the broader group¹⁶. The number of discounts each supplier pays to broader group customers may be limited, and some smaller firms do not pay those who do not automatically qualify¹⁸.

How the £150 is paid, including prepayment meters

The discount is £150 off an electricity bill, applied by the energy supplier rather than paid directly to the household¹⁹. The Warm Home Discount (England and Wales) Regulations 2026 define the prescribed rebate as a rebate of £150²⁰. Ofgem describes the scheme as providing £150 energy bill rebates funded through a levy on all domestic electricity suppliers²¹, and the department's own annual report refers to the £150 Warm Home Discount¹⁶.

For a prepayment meter the mechanism is different in form but the same in value: £150 off an electricity bill or £150 added to a prepayment meter². The discount is paid automatically through the electricity supplier, either as a credit to the account or as a voucher for a prepayment meter top-up³. The money is not paid to the household; the supplier applies it to the bill¹.

Two figures circulate for the value. One official source gives £140, while an official press release gives £150 off energy bills, and the two have not been reconciled. The £150 figure is the one carried by the regulations, Ofgem and the department's annual report, and it is the figure used here.

What to do instead of waiting

The first step is the supplier, because the supplier holds the eligibility record and applies the discount. If the supplier cannot resolve the query, guidance gives a postal address for eligibility queries: Warm Home Discount Scheme, PO Box 970, Preston, PR2 0FX³.

If a household believes it meets the criteria but no letter has arrived, StepChange advises contacting the Warm Home Discount helpline⁸. National Energy Action gives the number as 0800 731 0214 for households expecting a rebate that has not arrived by mid January⁶. Confused.com gives 0800 030 9322 for the Warm Home Discount phone line¹⁷. Both numbers appear in published guidance and the two figures disagree.

Where a supplier will not engage, the Energy Ombudsman route requires the complainant to have raised the complaint with the supplier first, then either received a deadlock letter or waited 8 weeks without resolution¹⁸. The same threshold applies to heat network complaints¹⁵. Evidence matters: the complaint date, and confirmation that the supplier name matches the name on the bill¹⁸.

The scheme has been evaluated through interviews and a survey with scheme recipients and interviews with supplier representatives²², which is the evidence base behind how suppliers administer it.

Switching suppliers, and what happens if yours stops trading

Switching away from a supplier that offers the Warm Home Discount to one that does not means losing it, even for the core group, so the new supplier's criteria are worth checking before switching¹². Not all suppliers offer it, and the practical sequence is to switch after receiving the discount so it is not lost for that year²³.

There is a partial protection. If a household switches supplier after the date its eligibility is checked, it might still get the discount from the supplier it was with on that date²⁴. That covers the assessment date rather than the whole scheme year.

If a supplier fails, the Supplier of Last Resort arrangements apply. A household receiving the Warm Home Discount should have it honoured by the new supplier²⁵. The regulations set a deadline for the notification of a failed supplier's non-core spending obligation: on or before 15 February in that scheme year²⁰.

The scheme itself has a long horizon. The England and Wales regulations continue the scheme until 31 March 2030²⁰. The Scottish scheme has effect until 31 March 2031, with certain duties continuing afterwards.

Where the scheme does not run

The Warm Home Discount Scheme does not run in Northern Ireland, where an Affordable Warmth Scheme is available instead²¹. The scheme is not available in Northern Ireland¹³, and it operates in England, Wales and Scotland only⁹. A household in Northern Ireland should look to the Affordable Warmth Scheme and the Cold Weather Payment rather than waiting for a letter that will not come³.

For households in Great Britain, the wider grant landscape sits alongside the discount. The Warm Home Discount is a bill rebate rather than an installation grant, and it is separate from the Warm Homes: Local Grant and the Energy Company Obligation, which fund physical measures. Households comparing the discount with the winter payments can read Warm Home Discount vs Winter Fuel Payment, and those whose discount has been refused can read what to do if the Warm Home Discount is refused.

On independence, the discount reduces a bill but leaves the household dependent on the supplier to identify it, on the data match to find it, and on the supplier's participation to pay it. It is a levy-funded transfer, not a step towards self-supply. The grants and energy independence page sets out where bill support ends and measures that reduce consumption begin.