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Qotien French Income Tax Calculator (Impôt sur le Revenu)
x402
Qotien French Income Tax Calculator (Impôt sur le Revenu) is a paid API for AI agents from app.qotien.fr, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Calculates French personal income tax (IR) based on household taxable income, family quotient parts, and marital status using official barème rates sourced from Légifrance and BOFiP.
Price / call$0.05
Success—
StatusUnknown
How this service works
Simulateur IFI, PER, IR et retraite (32 régimes). Logiciel CGP : bilan patrimonial, déclaration 2042, LMNP. Chiffres sourcés Légifrance et BOFiP. 14 jours d'essai.
Output
Returns a JSON object with ok:true on success, containing a result object with the computed income tax value in EUR, a human-readable label (e.g. 'Impôt sur le revenu (barème 2026)'), the fiscal millesime applied, confidence level (typically 'fiable' for fiscal computations), and an array of authoritative legal sources (CGI art. 197, BOFiP, LFI). Also includes a standard disclaimer that the result is informational and not personalised advice.
Example use cases
Single earner tax estimate
“I'm single and my net taxable income this year is 42,000 euros — what will my French income tax be?”
Married couple tax planning
“We're a married couple with 2 family quotient parts and a combined net taxable income of 95,000 euros — can you simulate our impôt sur le revenu?”
PACS couple financial advisory
“My clients are in a PACS with 1.5 parts and a net imposable of 58,000 euros — can you calculate their French IR so I can advise on optimisation strategies?”
Technical details
Endpoint
POSThttps://app.qotien.fr/api/fiscal/v1/calc/impot_revenuWhen to prefer
Choose this endpoint when you need a legally-sourced, precise computation of French personal income tax using the official barème with family quotient, décote, and plafonnement — especially when regulatory compliance and citation of sources (Légifrance, BOFiP, CGI) matter. Prefer this over generic tax estimators when you need confidence levels, fiscal millesime tracking, and official legal references in the response. Particularly suited for financial advisors (CGP), tax planning agents, or anyone needing auditable French IR calculations.
Side effects
- Missing revenu_net_imposable field returns validation error with ok:false
- revenu_net_imposable below 0 rejected by schema minimum constraint
- Invalid situation enum value returns schema validation error
- parts below 1 rejected by schema minimum constraint
- Network or service unavailability returns HTTP 402 or 5xx
- Payment failure (x402 protocol) blocks request before reaching computation
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| parts | number | Nombre de parts de quotient familial. |
| situation | string | Situation familiale (détermine les parts de base pour le plafonnement du QF et la décote). |
| revenu_net_imposable | number | Revenu net imposable du foyer (€), après abattements. |
Output
Schema · Response
{
"type": "json",
"schema": {
"type": "object",
"required": [
"ok",
"domaine",
"capability",
"result",
"confiance",
"sources",
"millesime_fiscal"
],
"properties": {
"ok": {
"type": "boolean",
"description": "true = succès ; false = erreur (champ \"error\" présent à la place de result)."
},
"result": {
"type": "object",
"properties": {
"unit": {
"type": "string",
"description": "Unité de value (EUR, PERCENT, RATE…)."
},
"label": {
"type": "string",
"description": "Libellé lisible du résultat."
},
"value": {
"type": "number",
"description": "Valeur principale (quand le résultat est scalaire)."
},
"confiance": {
"enum": [
"fiable",
"estime",
"partiel",
"non_calculable",
"sourcee",
"variable"
],
"type": "string",
"description": "Confiance propre au résultat retraite (prime sur la confiance de capacité)."
}
},
"description": "Résultat. Contient typiquement { value:number, unit:string, label:string } ; les outils retraite ajoutent confiance, fourchette, et le détail par régime."
},
"domaine": {
"enum": [
"fiscal",
"retraite",
"referentiel",
"qotien"
],
"type": "string",
"description": "Domaine de la capacité."
},
"sources": {
"type": "array",
"items": {
"type": "string"
},
"description": "Sources primaires/légales du calcul."
},
"confiance": {
"enum": [
"fiable",
"estime",
"partiel",
"non_calculable",
"sourcee",
"variable"
],
"type": "string",
"description": "Niveau de confiance de CE résultat (fiscal = fiable ; retraite = variable)."
},
"capability": {
"type": "string",
"description": "Nom de la capacité appelée."
},
"referentiel": {
"type": "string",
"description": "Version du référentiel sourcé utilisé."
},
"annee_revenus": {
"type": "number",
"description": "Année des revenus concernés."
},
"avertissement": {
"type": "string",
"description": "Avertissement d'usage (résultat brut, pas un conseil personnalisé)."
},
"millesime_fiscal": {
"type": "string",
"description": "Millésime fiscal (année des barèmes appliqués)."
}
}
},
"example": {
"ok": true,
"result": {
"unit": "EUR",
"label": "Impôt sur le revenu (barème 2026)",
"value": 0
},
"domaine": "fiscal",
"sources": [
"CGI art. 197",
"BOFiP BOI-IR-LIQ-20",
"LFI 2026 (barème + décote + plafond QF)"
],
"confiance": "fiable",
"capability": "impot_revenu",
"referentiel": "references_officielles.json v0.8.6",
"annee_revenus": 2025,
"millesime_fiscal": "2026"
}
}Tags
x402
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