Living in the Netherlands

Looks up a Dutch-registered car by its number plate (kenteken) in the official RDW register: make, model, first registration, fuel, CO2 emission, catalogue price, empty weight, when the periodic inspection (APK) is due and whether it is insured. With a taxable income it also gives the company car tax (bijtelling) for 2026, including the electric-car rate locked for 60 months from first registration. Live data from RDW Open Data.

{
  "type": "object",
  "properties": {
    "plate": {
      "type": "string",
      "description": "Dutch number plate, with or without dashes, e.g. AB-123-C"
    },
    "taxable_income": {
      "type": "number",
      "description": "Taxable income per year before the bijtelling, for the company car tax (optional)"
    }
  },
  "required": [
    "plate"
  ],
  "additionalProperties": false
}

What is left each month in a Dutch city: net salary (2026 tax, optional 30% ruling and holiday allowance) minus a typical unregulated-sector rent for the home size in that city, the basic health insurance premium (less any healthcare allowance), an average energy bill and the municipal charges for a renter. Cities with their own figures: Amsterdam, Amstelveen, Haarlem, The Hague, Rotterdam, Utrecht, Eindhoven, Helmond, Leeuwarden, Zwolle; any other city uses the national average rent and leaves out municipal charges. Food, transport, internet and water board charges are not included.

{
  "type": "object",
  "properties": {
    "gross_annual": {
      "type": "number",
      "description": "Gross yearly salary in euros, without holiday allowance"
    },
    "city": {
      "type": "string",
      "enum": [
        "amsterdam",
        "amstelveen",
        "haarlem",
        "the_hague",
        "rotterdam",
        "utrecht",
        "eindhoven",
        "helmond",
        "leeuwarden",
        "zwolle",
        "other"
      ],
      "description": "City. Default other (national average)."
    },
    "home_size_m2": {
      "type": "number",
      "description": "Size of the rented home in m². Default 60."
    },
    "adults": {
      "type": "number",
      "description": "Adults in the household (each pays health insurance). Default 1."
    },
    "monthly_rent": {
      "type": "number",
      "description": "Actual monthly rent if known, instead of the city average (optional)"
    },
    "holiday_allowance": {
      "type": "boolean",
      "description": "Gets 8% holiday allowance (spread over 12 months here). Default true."
    },
    "thirty_percent_ruling": {
      "type": "boolean",
      "description": "Has the 30% ruling. Default false."
    }
  },
  "required": [
    "gross_annual"
  ],
  "additionalProperties": false
}

Current Dutch amounts that change every year, each with the period it applies to and its official source, so an answer does not rely on outdated knowledge. Topics: health_deductible (Healthcare deductible (eigen risico)), child_benefit (Child benefit (kinderbijslag)), passport_id_fees (Passport and identity card fees), ind_fees (IND application fees (residence permits and naturalisation)), rent_limits (Rent limits and maximum rent increases), minimum_wage (Minimum wage (wettelijk minimumloon)). Ask by topic, or with a short question. For income tax figures use the tax server's dutch_tax_figures tool.

{
  "type": "object",
  "properties": {
    "topic": {
      "type": "string",
      "enum": [
        "health_deductible",
        "child_benefit",
        "passport_id_fees",
        "ind_fees",
        "rent_limits",
        "minimum_wage"
      ],
      "description": "One of the topics"
    },
    "question": {
      "type": "string",
      "description": "A short question or keywords, e.g. \"passport cost\" or \"kinderbijslag\" (used when no topic is given)"
    }
  },
  "additionalProperties": false
}

For a rented independent home (zelfstandige woning: own front door, kitchen and toilet) in the Netherlands: from its points under the points system (woningwaarderingsstelsel, WWS), the rental sector (social up to 143 points, regulated mid-rent up to 186, free sector above), the legal maximum basic monthly rent (kale huur) for 2026, whether a current rent is above it, and the maximum yearly rent increase for that sector. The points come from the government's Huurprijscheck on huurcommissie.nl. Rooms (onzelfstandige woonruimte) use a different table and are not covered.

{
  "type": "object",
  "properties": {
    "points": {
      "type": "number",
      "description": "Points of the home under the points system (from the Huurprijscheck)"
    },
    "current_rent": {
      "type": "number",
      "description": "Current basic monthly rent (kale huur, without service costs) in euros (optional)"
    },
    "contract_start": {
      "type": "string",
      "description": "Start date of the rental contract, YYYY-MM-DD (optional; mid-rent limits apply to contracts from 1 July 2024)"
    },
    "proposed_increase_pct": {
      "type": "number",
      "description": "A rent increase the landlord proposed, in % (optional)"
    }
  },
  "required": [
    "points"
  ],
  "additionalProperties": false
}