How the BUS grant application works in 2026: a step-by-step UK guide

Who applies, who gets paid, who decides

The BUS scheme is administered by Ofgem on behalf of DESNZ (Department for Energy Security and Net Zero). The grant is paid through MCS-certified installers — not directly to homeowners. This is the most important thing to understand because it reverses the intuitive flow of most government grants you might expect.

The sequence:

1. You hire an MCS-certified installer. They quote you the gross install cost.
2. The installer applies the £7,500 as a deduction to the quote. Your contractually-owed amount is the net figure.
3. You sign a BUS consent form authorising the installer to claim the grant on your behalf, plus a standard installation contract.
4. The install happens, then commissioning. You pay the installer the NET amount.
5. The installer submits the BUS claim to Ofgem after registering the install on the MCS scheme.
6. Ofgem pays £7,500 to the installer within 4–6 weeks of a clean claim.

You never see the £7,500 in your bank account — the installer carries the cash-flow risk between discounting your invoice and receiving Ofgem’s payment. That’s why the scheme requires the installer to be MCS-certified: it gates participation to firms with the accreditation and financial stability to handle the timing gap.

Eligibility — three things that must be true

Before the £7,500 can apply, three conditions must be met:

• Property in England or Wales. Scotland and Northern Ireland have separate schemes (Home Energy Scotland, Renewable Heat Premium NI). The BUS itself covers only English and Welsh properties.
• Owner-occupier or private rented sector. Council houses and housing-association properties are generally excluded (handled through ECO and other scheme routes). Owner-occupiers + landlords renting to private tenants are eligible.
• Valid EPC with insulation recommendations cleared.The EPC must be less than 10 years old. Any “loft insulation” or “cavity wall insulation” recommendation on the EPC must be EITHER completed (with a fresh EPC reflecting the completion) or exempted via specific criteria (listed building, technical infeasibility, etc.). Other recommendations (e.g. double glazing, draught proofing) don’t block the grant.

The paperwork — what you actually sign

Three documents matter in a typical BUS install:

• BUS consent form (Ofgem).Authorises the installer to claim the grant on your behalf and collect the £7,500 from Ofgem. Standardised Ofgem form, one page, signed before commissioning. Don’t sign this until you’ve seen the net-of-grant quoted price and are happy with the installer.
• Installation contract.Your installer’s standard contract for the install itself. Should reference the gross + net amounts, the BUS deduction line, the deposit / staged payment structure if any, the warranty, and the commissioning timetable.
• MCS Installation Certificate (post-install). Issued by the installer after commissioning, registered with MCS’s database. This is YOUR proof of a compliant install — keep the certificate; it’s required for the grant claim AND for warranty / future house sale.

The typical timeline

Realistic BUS install timeline for a UK 3-bed semi in 2026:

• Week 0: You request quotes from 2–3 MCS-certified installers. They visit, run heat-loss surveys.
• Weeks 1–2: Quotes return. You compare, pick an installer. Sign installation contract + BUS consent form.
• Weeks 2–4: Equipment ordered, lead time on the heat pump unit + cylinder. Installer schedules install date.
• Weeks 4–5: Install (typically 2–3 working days on site).
• Week 5: Commissioning — installer runs the system, tunes weather compensation, sets up your tariff if relevant, issues MCS Installation Certificate. You pay the NET-of-grant invoice.
• Weeks 5–11:Installer submits BUS claim, Ofgem processes (4–6 weeks typical), £7,500 paid to installer. You’re not involved in this leg.

End-to-end: 4–10 weeks from quote to commissioning. If your EPC needs renewal or insulation needs clearing, add 2–4 weeks.

What could go wrong — and how to avoid it

Three common BUS-application issues:

• EPC out of date. Ofgem requires the EPC to be less than 10 years old. ~15% of UK owner-occupied homes have EPCs older than this. Fresh EPC costs ~£60–£120 + 1–2 weeks. Check your EPC validity at gov.uk/find-energy-certificate before requesting quotes — saves time if you need to commission a fresh one early.
• Insulation recommendations uncleared. ~60% of UK EPCs flag loft or cavity insulation as “recommended”. If yours does, you’ll need to either complete the insulation work OR show an exemption applies. Loft top-up costs £400–£1,500; cavity wall £1,500–£3,500. Often the same trade can quote both insulation + heat pump if you mention it early.
• Installer or product not MCS-certified. The grant requires both the installer’s firm AND the specific heat-pump model to be MCS-certified at the time of install. Lapsed certifications happen occasionally. Verify at mcscertified.com/find-an- installer (installer search) and mcscertified.com/ find-a-product (product search) before signing.

If something goes wrong post-install

If the install completes but the BUS payment fails — the installer can’t claim the grant for some reason — responsibility depends on the contract you signed. Most standard installer contracts pass the grant-failure risk to the homeowner (you owe the gross amount if the grant doesn’t pay out). Check this clause carefully before signing. Some installers offer to absorb the risk; most don’t.

Dispute resolution paths if the install or the grant process goes wrong:

1. Installer’s complaints process — most MCS installers have a documented complaints policy with a 14-day initial response window.
2. MCS Complaints Service at mcscertified.com/raise-a-complaint — independent adjudication on MCS-certified installs.
3. Renewable Energy Consumer Code (RECC) for consumer protection on renewable-energy installs. Most MCS installers are RECC-registered.
4. Ofgem for BUS-specific scheme disputes (grant payment, eligibility decisions).

Before you start — the pre-survey shortcut

The free pre-survey at propertoasty.com/check runs through BUS eligibility for your specific property before you contact any installer:

• Checks your EPC validity + flags any uncleared insulation recs.
• Confirms England/Wales eligibility.
• Generates an installer-ready report with property heat-loss indication.
• Saves 1–2 weeks of pre-quote diligence.

The summary

The BUS grant works because the homeowner-side complexity is minimal: sign two pieces of paper (consent form + contract), pay the net invoice, keep the MCS certificate for your records. The £7,500 mechanics — Ofgem, installer claim, payment timing — happen on the installer’s side. The three things to get right BEFORE quoting are EPC validity, cleared insulation recommendations, and verifying installer + product MCS certification at mcscertified.com. Everything else flows from a competent MCS installer’s standard process.

Related reading

• Fabric-first retrofit before a heat pump — how to clear the loft + cavity recommendations that gate the BUS grant, and which insulation measures most help heat-pump performance.
• MCS heat pump site visit: what to expect — the installer survey that produces the quote on which your BUS application is based.
• Heat pump vs gas boiler comparison — the decision context most BUS applicants are working through alongside the grant paperwork.