UK cost and grant planner · reviewed September 2026

Heat pump cost calculator.

Turn an installer price, separately quoted upgrades and the support amount you want to test into a clear before-and-after budget. No email required.

Build your project budgetUse a written quote where you have one.

Step 1 of 2

Property and proposed system

Home nation

Boiler Upgrade Scheme amounts shown here apply in England and Wales.Heat-pump system

Existing heating fuel

Is the property off the gas grid?

Installation and extra work

Main installer quote or planning figure

Starts at the published £12,500 median for 2024/25 air-to-water installations. Replace it with your own VAT-inclusive quote.Radiators or emitters

Hot-water cylinder

Electrical work

Other separately quoted work

Grant to include in the budget

Selected support amount

Selecting an amount does not establish eligibility. The installer-led application and property/system rules still apply.

Example budgeting estimateFree result. No contact details required.

Step 2 of 2

Budget after selected grant

£5,000Before financing, running costs or unquoted work

Project before support£12,500Main figure plus separate extras

Selected grant applied−£7,500Capped at the project total

Extra works entered£0Do not duplicate quote inclusions

Main installation figure£12,500Visitor-entered planning amount

Checks raised by your inputs

The £12,500 starting figure matches the published 2024/25 median for Boiler Upgrade Scheme air-to-water installations; replace it with a current written quote as soon as possible.

Calculation assumptions

The main quote and extra-work figures are amounts entered by the visitor and should include VAT where applicable.
Only extras that are not already included in the main installer quote should be entered.
The selected grant is a budgeting input, not an eligibility decision or approval.

Budget, not an eligibility decision or quotation

Ask an MCS-certified installer to complete a heat-loss calculation, confirm grant eligibility and give you an itemised written scope. Check radiators, cylinder, controls, electrics, groundwork, commissioning, VAT and making-good.

After your free estimate

Want an exact local price?

A heat-loss calculation, system design and written scope are needed to price the equipment, emitters, cylinder, electrics and commissioning.

Optional. Your estimate stays visible. We'll use a short qualification step so unsuitable or out-of-area requests are not passed around.

How the calculation works

Your quote and extras in. Your selected support amount out.

The calculator adds the main installation figure to any separately entered radiator, cylinder, electrical and other work. It then subtracts the grant amount selected, capped at the total project cost.

The £12,500 starting point is the government's published 2024/25 median for Boiler Upgrade Scheme air-to-water installations. Energy Saving Trust gives a typical air-source figure of around £12,000. Neither is a substitute for an itemised property-specific quote.

What changes the result

Factors worth checking before you decide.

The property's room-by-room heat loss and the chosen flow temperature.

Heat-pump type, capacity, controls and seasonal performance.

Radiator, underfloor-heating or other emitter changes.

Hot-water-cylinder space, size and controls.

Electrical supply, groundwork, pipe routes and access.

Grant eligibility, installer scope, VAT, commissioning and making-good.

Worked examples

See how the assumptions move the answer.

Published median, standard grant£5,000 after grant

A £12,500 main installation figure with no separate extras and £7,500 selected support.

Median plus £3,000 emitters£8,000 after grant

A £12,500 main figure, £3,000 separately quoted radiator work and £7,500 selected support.

Qualifying off-grid scenario£8,500 after grant

A £15,000 main figure, £2,500 of separate work and the £9,000 support amount—subject to all current scheme conditions.

Common questions

Questions homeowners ask before spending.

How much does an air-source heat pump cost in the UK?

Energy Saving Trust gives a typical air-source installation cost of around £12,000. The government's Boiler Upgrade Scheme business case reports a 2024/25 median of approximately £12,500 for air-to-water installations. A property's heat loss, emitters, cylinder, electrics and access can move a real quote substantially.

How much is the Boiler Upgrade Scheme grant?

For eligible installations in England and Wales, the current published amounts are £7,500 for air-to-water and ground-source heat pumps and £2,500 for eligible residential air-to-air systems. Until March 2027, qualifying off-gas-grid homes replacing oil or LPG can receive an extra £1,500 on eligible air-to-water or ground-source installations.

Does this calculator confirm that I qualify for a grant?

No. The selected grant is only a budgeting input. A participating MCS installer applies for the Boiler Upgrade Scheme and must confirm the property, technology and installation meet the current rules.

Should radiator and cylinder upgrades be included?

Include them only when they are outside the main installer price. The calculator keeps these allowances separate so you can avoid double-counting and compare itemised scopes.

Is the result an installer quotation?

No. It subtracts the support amount you select from the cost figures you enter. You still need a heat-loss calculation, system design and itemised written quotation.

Sources and review trail

Transparent inputs, versioned model.

Last reviewed: 13 September 2026
Model/version: uk-heat-pump-budget-2026.09.1

Read the full calculator methodology →