Cost indicators

Depending on the supply chain partner handling the installation of measures it is possible to overwrite default values in regards to costs and calculations when given as input.

General assumptions 2025

fixed_gas_price	float	Fixed gas cost.Transporttarief + vast leverlingstarief	337,89	In €/year
variable_gas_price	float	Variable price exc. tax. Variabel leveringstarief contractprijs	0.6595	In €/m^3
energy_tax_gas	float	Energy tax on gas	0.69957	In €/m^3
fixed_electricity_price	float	Fixed electricity price. Transporttarief + vast leveringstarief	575.76	In €/year
variable_electricity_price	float	Variable price exc. tax. Variabel leveringstarief contractprijs	0.1470	In €/kWh
energy_tax_electricity	float	Energy tax on electricity	0.12286	In €/kWh
fixed_heat_price	float	From Vattenvall, tarifs 2025	760.77	In €/year
energy_tax_heat	float	Tax on consumed external heat	0	In €/GJ
variable_heat_price	float	From Vattenvall, including, rent afleverset	43.79	In €/GJ
tax_credit	float	Vermindering energiebelasting	635.19	In €/year
feed_in_compensation	float	Earnings per kwh fed back in the grid	0.1331	In €/kWh
feed_in_cost	float	Cost per kwh fed back in the grid	0.125	In €/kWh
fixed_solar_panel_cost	float	Yearly extra charge from electricity supplier if you have solar panels	0	In €/year
netting_percentage	float	The fraction of produced electricity that is returned to the grid (and will count towards salderingsregeling.	0.65	%
gas_yearly_price_increase	float	Expected percentage increase in gas price	0.03	%
electricity_yearly_price_increase	float	Expected percentage increase in electricity price	0.02	%
external_heating_yearly_price_increase	float	Expected percentage increase in external heating price	0.03	%
term	integer	The term in years used for calculation return on investment	25	In year
discount_rate	float	Discount rate (~inflation) used in return on investment calculation	0.04	%
tax_rate	float	General VAT	1.21	%
custom_costs	dict	TBA	{}

Input schema

"cost_indicators": {
      {
        "name": value
      }}

Example

{
  "postcode": "3024XL",
  "housenumber": 227,
  "houseaddition": "B",
  "cost_indicators": {
    "fixed_gas_price": 337.89,
    "variable_gas_price": 0.6595,
    "energy_tax_gas": 0.69957,
    "fixed_electricity_price": 575.76,
    "variable_electricity_price": 0.1470,
    "energy_tax_electricity": 0.12286,
    "fixed_heat_price": 760.77,
    "energy_tax_heat": 0,
    "variable_heat_price": 43.79,
    "tax_credit": 635.19,
    "feed_in_compensation": 0.1331,
    "feed_in_cost": 0.125,
    "fixed_solar_panel_cost": 0,
    "netting_percentage": 0.65,
    "gas_yearly_price_increase": 0.03,
    "electricity_yearly_price_increase": 0.02,
    "external_heating_yearly_price_increase": 0.03,
    "term": 25,
    "discount_rate": 0.04,
    "tax_rate": 1.21
  }
}

Custom measure costs

Code	Description	From	To	Unit
10001	Gevelisolatie naar type “Matig”		2	€/m2
10002	Gevelisolatie naar type “Goed”		3	€/m2
10003	Gevelisolatie naar type “Zeer goed”		4	€/m2
20002	Vloerisolatie naar type “Goed”		3	€/m2
20003	Vloerisolatie naar type “Zeer goed”		4	€/m2
30002	Dakisolatie naar type “Goed”		3	€/m2
30003	Dakisolatie naar type “Zeer Goed”		4	€/m2
50002	Glas van type ''Enkel glas'' naar type ''HR++ glas''	1	3	€/m2
50003	Glas van type ''Enkel glas'' naar type ''Drievoudig glas''	1	4	€/m2
50102	Glas van type ''Dubbel glas'' naar type ''HR++ glas''	2	3	€/m2
50103	Glas van type ''Dubbel glas'' naar type ''Drievoudig glas''	2	4	€/m2
50203	Glas of type ''HR++ glas'' naar type ''Drievoudig glas''	3	4	€/m2
60003	Ventilatie naar type ''Decentraal mechanisch''		4	€/unit
80004	Installatie van type ''Lokaal gasverw.+geiser'' naar type ''HR-combi''	1	4	€/unit
80104	Installatie van type ''VR-ketel+geiser'' naar type ''HR-combi''	2	4	€/unit
80204	Installatie van type ''VR-combi'' naar type ''HR-combi''	3	4	€/unit
80008	Installatie van type ''Lokaal gasverw.+geiser'' naar type ''WP lucht combi''	1	6	€/unit
80108	Installatie van type ''VR-ketel+geiser'' of ''VR-combi'' naar type ''WP lucht combi''	2, 3	6	€/unit
80408	Installatie van type ''HR-combi'' of ''HR-combi+zonneboiler'' naar type ''WP lucht combi''	4, 5	6	€/unit
80030	Installatie van type ''Lokaal gasverw.+geiser'' naar type ''Hybride warmtepomp''	1	8	€/unit
80130	Installatie van type ''VR-ketel+geiser'' of ''VR-combi'' naar type ''Hybride warmtepomp'	2, 3	8	€/unit
80430	Installatie van type ''HR-combi'' of ''HR-combi+zonneboiler'' naar type ''Hybride warmtepomp''	4, 5	8	€/unit
70000	PV Panelen naar type ''PV Paneel per m2''			€/paneel

Input schema

"cost_indicators": {
      {
        "custom_measure_costs": {"code":value, 
                                 "code":value
                                 }
      }}

Example

{
  "postcode": "2771DS",
  "housenumber": 87,
  "houseaddition": "",
  "cost_indicators": {
    "custom_measure_costs": {"10002": 41,
                             "20003": 72,
                             "30003": 86,
                             "40003": 86,
                             "60003": 2800,
                             "80408": 11151,
                             "70000": 182
                             }
                      }
}