Connected guide
Household running costs
Compare two heating, electricity and commuting choices using your own annual demand and prices. Revise any earlier step to update the downstream budget. Your figures stay in this page’s memory, not in storage or the address.
How to use this planner
- Enter your annual heat, base electricity and commuting distance.
- Describe Option A and Option B: efficiency, prices, standing charges and commute method.
- Compare annual totals and monthly averages on the same demand.
Illustrative figures. The values shown at first are examples only. Replace them with your own.
Privacy. Your figures stay in this page's memory only. Nothing is saved or sent, and reloading clears them.
Assumptions and limits
- Base electricity must exclude heating and car charging, which are priced separately.
- Running costs only: no equipment, installation, grants, finance or future price changes.
- Monthly figures are annual averages, not exact bills.
Every step shares one set of inputs. Change an earlier step and every figure below recalculates. Nothing is saved, and refreshing the page clears it.
Your result
- Option B monthly average
- €277.92
- Monthly cost difference
- €87.11
Calculation method
Divide useful heat demand by seasonal efficiency or COP to estimate purchased heating energy. Add electricity consumption and standing charges. Add fuel, grid-energy charging or entered annual fares for commuting. Compare annual totals and annual/12 monthly averages on the same demand basis.
All calculated figures · 13
- Option A annual cost
- €4,380.33
- Option B annual cost
- €3,335.00
- Lower annual running cost
- Option B
- Difference in total cost
- €1,045.33
- Option A annual heating
- €1,453.33
- Option B annual heating
- €1,200.00
- Option A annual base electricity
- €1,415.00
- Option B annual base electricity
- €1,415.00
- Option A annual commuting
- €1,512.00
- Option B annual commuting
- €720.00
- A Heating Energy KWh
- 13,333.3333 kWh
- B Heating Energy KWh
- 4,000 kWh
- Savings Period
- Annual running costs; monthly figures are annual averages
Assumptions and sources
- Replace the illustrative figures with your own quotes and prices, including any taxes and charges you will actually pay. Figures stay in this page's memory and clear on reload. This is a planning estimate, not a quote or a recommendation. Baseline electricity must exclude heating and car charging, which are priced separately. Electric heating uses the household electricity price and adds no second standing charge. EV consumption is grid energy including losses. Savings are annual running costs only: no equipment purchase, installation, vehicle ownership, grants, financing, maintenance or future price changes. Monthly averages are not exact bills.
How the workflow connects your figures
Divide useful heat demand by seasonal efficiency or COP to estimate purchased heating energy. Add electricity consumption and standing charges. Add fuel, grid-energy charging or entered annual fares for commuting. Compare annual totals and annual/12 monthly averages on the same demand basis.
Replace the illustrative figures with your own quotes and prices, including any taxes and charges you will actually pay. Figures stay in this page's memory and clear on reload. This is a planning estimate, not a quote or a recommendation. Baseline electricity must exclude heating and car charging, which are priced separately. Electric heating uses the household electricity price and adds no second standing charge. EV consumption is grid energy including losses. Savings are annual running costs only: no equipment purchase, installation, vehicle ownership, grants, financing, maintenance or future price changes. Monthly averages are not exact bills.
- Your household's demand: Annual useful heat needed (kWh), Annual electricity excluding heating and car charging (kWh), Annual commuting distance (km).
- Option A: Option A: heating uses electricity, Option A: heating efficiency or COP, Option A: heating fuel price per kWh (€), Option A: separate heating standing charges per year (€), Option A: electricity price per kWh (€), Option A: electricity standing charges per year (€), Option A: commuting method, Option A: litres per 100 km, Option A: price per litre (€), Option A: grid kWh per 100 km, including charging losses, Option A: blended charging price per grid kWh (€), Option A: annual fares or other commuting charges (€), Option A: additional annual parking / travel charges (€).
- Option B: Option B: heating uses electricity, Option B: heating efficiency or COP, Option B: heating fuel price per kWh (€), Option B: separate heating standing charges per year (€), Option B: electricity price per kWh (€), Option B: electricity standing charges per year (€), Option B: commuting method, Option B: litres per 100 km, Option B: price per litre (€), Option B: grid kWh per 100 km, including charging losses, Option B: blended charging price per grid kWh (€), Option B: annual fares or other commuting charges (€), Option B: additional annual parking / travel charges (€).
Worked example
Illustrative inputs, not a recommendation or quotation. Defaults can be changed above; this example does not describe your own circumstances.
See carried example inputs
- Annual useful heat needed (kWh)
- 12000
- Annual electricity excluding heating and car charging (kWh)
- 3500
- Annual commuting distance (km)
- 12000
- Option A: heating uses electricity
- No
- Option A: heating efficiency or COP
- 0.9
- Option A: heating fuel price per kWh (€)
- 0.1
- Option A: separate heating standing charges per year (€)
- 120
- Option A: electricity price per kWh (€)
- 0.3
- Option A: electricity standing charges per year (€)
- 365
- Option A: commuting method
- Petrol or diesel
- Option A: litres per 100 km
- 7
- Option A: price per litre (€)
- 1.8
- Option A: additional annual parking / travel charges (€)
- 0
- Option B: heating uses electricity
- Yes
- Option B: heating efficiency or COP
- 3
- Option B: electricity price per kWh (€)
- 0.3
- Option B: electricity standing charges per year (€)
- 365
- Option B: commuting method
- Electric vehicle
- Option B: grid kWh per 100 km, including charging losses
- 20
- Option B: blended charging price per grid kWh (€)
- 0.3
- Option B: additional annual parking / travel charges (€)
- 0
- Option A monthly average
- €365.03
- Option B monthly average
- €277.92
- Monthly cost difference
- €87.11