Running Costs
How Much Does a Heat Pump Cost to Run?
A practical guide to heat pump running costs with a worked example, a quick decision tree, and links to official UK and Ireland price data.
Read guideHome Energy Calculators
Heat Pump & Home Energy Cost Calculators
Free heat pump and home energy calculators for the UK, Ireland, and Europe. Compare running costs, sizing, grants, insulation, appliance costs, and payback. Estimates are educational and should be validated with installer quotes and named references such as SEAI, GOV.UK, Ofgem, and Eurostat.
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Page review status
Written by: HeatWise Home Editorial Team
Reviewed by: Editorial review by HeatWise Home
Review status: Internally reviewed for clarity, source consistency, and calculation assumptions.
Expert review: Not currently externally expert-reviewed.
Last updated: 2026-04-28
Last reviewed: 2026-04-28
Confidence: medium
Sources:
External expert review: HeatWise Home does not currently publish named external expert reviewers. We are working toward adding independent review from qualified retrofit, heating, or building-energy professionals. Until then, users should treat our calculators and guides as educational planning tools and confirm decisions with official sources and qualified installers.
Start with a calculator
Pick the question closest to your decision today. Each calculator uses editable assumptions and shows its limitations clearly.
Heat Pump Cost Calculator
Compare current heating bills against estimated heat pump running cost, savings, payback, and CO2 reduction.
Open pageHeat Pump Sizing Calculator
Sense-check heat loss and likely heat pump size before requesting a professional survey.
Open pageHome Energy Cost Calculator
Build a simple picture of monthly electricity, heating, hot water, and annual energy cost.
Open pageInsulation ROI Calculator
Estimate net upgrade cost, annual savings, simple payback, and 10-year value for fabric improvements.
Open pageAppliance Running Cost Calculator
Turn wattage and usage time into daily, monthly, and annual appliance electricity costs.
Open pageHeat Pump Grants Guide
Understand how grant assumptions affect upfront cost and why rules must be checked before applying.
Open page2026 Heat Pump Grant Tracker
Country-level grant snapshot with last-checked dates, confidence labels, and official source links.
Open pageHeat Pump Running Cost Index
Compare running-cost assumptions, SCOP ranges, and example scenarios across multiple countries.
Open pageElectricity-to-Gas Ratio Tracker
Understand why electricity-to-gas ratios can make or break heat pump economics.
Open pageHelpful next step
Adjust fuel prices, SCOP, grants, and costs using your own numbers.
Estimate your heat pump paybackUK guides
English-first planning pages for UK heat pump costs, grants, boiler comparisons, older homes, and insulation savings.
UK Heat Pump Cost Calculator
Estimate running costs, payback, and grant-adjusted installation cost using editable UK assumptions.
Explore this guideUK Heat Pump Grants
Check grant planning, eligibility cautions, and official source links before relying on support.
Explore this guideBoiler Upgrade Scheme Calculator
Estimate potential BUS support with installer-led process and consent checkpoints.
Explore this guidePopular homeowner questions
How much does a heat pump cost to run?What size heat pump do I need?Is a heat pump cheaper than oil heating?Which insulation upgrades should come first?Can radiators work with heat pumps?How do heat pump grants affect payback?Where can I track live heat pump grants by country?How does the electricity-to-gas ratio affect heat pump savings?How do the calculator assumptions work?
Ireland heat pump guides
Ireland-focused heat pump calculators, grants guidance, oil boiler comparisons, attic insulation savings, and older home planning.
Ireland Heat Pump Cost Calculator
Estimate running cost, savings, payback, and grant-adjusted installation cost using Ireland-focused assumptions.
Explore this guideHeat Pump Grants in Ireland
Understand grant planning, eligibility checks, and why current official rules matter.
Explore this guideSEAI Heat Pump Grant Calculator
Estimate relevant SEAI grant components with clear non-eligibility disclaimers.
Explore this guideEurope guides
Europe-wide comparisons for country assumptions, grants, electricity versus gas prices, running costs, and high-income regions where home energy upgrades may be more feasible.
Europe Heat Pump Hub
Compare country assumptions, price ranges, grant context, and caveats in one maintained table.
Explore this guideHeat Pump Grants by Country
Use official source links and country notes before assuming grant support.
Explore this guideWealthy Region Opportunities
Careful targeting notes for high-income regions where major home upgrades may be more fundable.
Explore this guideCountry guides
Country pages include editable assumptions, official source links, last-reviewed dates, and confidence levels. Unverified price values are left blank and labelled clearly.
Popular planning routes
UK heat pump calculatorIreland heat pump calculatorEurope heat pump costsIreland heat pump grantsUK Boiler Upgrade Scheme guideSEAI grant calculatorHeat pump quote checklistHeat pump running cost indexBUS grant calculatorHeat pump vs oil boiler IrelandHeat pump vs gas boiler UKBlogCalculator methodology
Latest guides
Detailed articles on running costs, sizing, grants, insulation, radiators, and planning mistakes.
Older Homes
Is a Heat Pump Worth It for an Older House?
Older homes can work with heat pumps when the plan includes heat-loss checks, emitter checks, and a staged upgrade checklist.
Read guideComparisons
Heat Pump vs Gas Boiler Running Costs
A side-by-side running-cost comparison with break-even maths, a decision checklist, and official data links.
Read guideComparisons
Heat Pump vs Oil Boiler Running Costs
An off-gas-grid comparison with an oil-price sensitivity table, common pitfalls, and rural-home decision guidance.
Read guideSizing
What Size Heat Pump Do I Need?
Sizing should start with heat loss, not guesswork. Use the worked homeowner scenario and room-by-room decision tree to sense-check quotes.
Read guideInsulation
Best Insulation Upgrades Before Installing a Heat Pump
Use this fabric-first roadmap to prioritize upgrades, avoid low-value spend, and spot when not to install a heat pump yet.
Read guideCalculators on this site are estimates only. Always get a professional heat loss survey and verify current grant rules, tariffs, and product suitability before making purchase decisions.
Trust and transparency
Calculators on HeatWise Home are estimates only. We do not guarantee savings, grant eligibility, or installation suitability. Energy prices, fuel costs, grant rules, and equipment performance can change, and heat pump projects should be backed by a professional heat loss survey.
Frequently asked questions
HeatWise Home is for homeowners researching heat pump costs, grants, insulation upgrades, appliance electricity use, and ways to lower energy bills.
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Helpful next step
Pressure-test savings assumptions before committing to upgrades.
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