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The grant depends on which nation the house is in

There is no UK heat pump grant. There are two, in different places, with different amounts and different administrators, and a third of the country has neither. Any page, tool or quote that treats "the grant" as one thing is wrong for somebody.

Amounts below come from GOV.UK, Ofgem and Home Energy Scotland, consulted 23 August 2026. Schemes change; check before you put a figure in front of a customer.

England and Wales: the Boiler Upgrade Scheme

A fixed amount per appliance, regardless of the size of the system and regardless of the customer's income. That is unusual and it makes quoting simple:

• £7,500 for an air source heat pump
• £7,500 for a ground source heat pump
• £2,500 for an air-to-air heat pump, homes only
• £5,000 for a biomass boiler

Homes without a gas connection get £9,000 instead of £7,500 for the two main heat pump types. That uplift runs from 21 July 2026 to 31 March 2027 — an eight month window, not a standing rule, and worth knowing about while it is open. The scheme itself is scheduled to run to 31 December 2027.

What the scheme asks of you

• The property is owned by the applicant — a home or a small non-domestic building.
• There is currently a fossil fuel boiler or electric heating without a heat pump.
• You are MCS certified.
• You are a member of a recognised consumer code: RECC or HIES.

The certification requirement is the one that shapes a business rather than a job. Without MCS your customer cannot have the grant, which in practice means you are not quoting for that work at all.

Scotland: a different scheme entirely

Home Energy Scotland pays £7,500 for a heat pump, with a rural uplift of £1,500 for remote areas and islands — £9,000 together. Alongside it sits an optional interest-free loan of £7,500, which is not a feature the English scheme has at all. There is no income test for the standard grant. For lower-income households, Warmer Homes Scotland may cover the installation in full.

Northern Ireland: neither

Neither scheme runs there. That is not an oversight in this article; it is the position. A quote generated from a UK-wide template that shows a grant line to a customer in Belfast is promising money that does not exist.

Insulation runs on a different model again

ECO4 does not pay the customer anything. The work is carried out and paid for by an energy supplier, so an insulation enquiry under it is a referral rather than a quote with a grant line. It closes on 31 December 2026 and its successor is still in consultation. The Great British Insulation Scheme closed on 31 March 2026 and should not be offered, although customers will still ask about it. Warm Homes: Local Grant runs in England to 31 March 2028, but each council sets its own amounts and conditions — so that one is a signpost to the customer's local authority, not a number.

How to keep this straight in practice

The postcode is the only piece of information you reliably have that answers the question. Outward codes beginning BT are Northern Ireland; the Scottish areas are a known list. Working the eligibility off the address rather than off a country setting is what stops a quote promising the wrong thing. More on the VAT side in VAT on energy-saving materials.