Read-only IFTA fuel-tax answers and quarterly estimates with official rates. Not tax advice.
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Answers US/Canadian IFTA fuel-tax questions for trucking owner-operators: the Q3 2026 (Jul-Sep) due date, how the quarterly reconciliation works, and official IFTA 3Q2026 tax and surcharge rates per jurisdiction and fuel. If miles and gallons per jurisdiction are given, it estimates the quarter's tax owed or credit with the same maths as the free IFTA calculator at ifta-calculator.pages.dev. Only Q3 2026 rates are loaded. Estimates only, not tax advice and not a filed return. Read-only: it stores nothing and files nothing.
The user's IFTA question in plain language, e.g. 'When is Q3 2026 IFTA due?' or 'What is Kentucky's diesel rate?'
Fuel type for rates and the estimate. Defaults to Diesel.
Optional, for an estimate: total miles driven and fuel gallons bought in each jurisdiction this quarter.
Answers US/Canadian IFTA fuel-tax questions for trucking owner-operators: the Q3 2026 (Jul-Sep) due date, how the quarterly reconciliation works, and official IFTA 3Q2026 tax and surcharge rates per jurisdiction and fuel. If miles and gallons per jurisdiction are given, it estimates the quarter's tax owed or credit with the same maths as the free IFTA calculator at ifta-calculator.pages.dev. Only Q3 2026 rates are loaded. Estimates only, not tax advice and not a filed return. Read-only: it stores nothing and files nothing.
| Argument | Type | Description |
|---|---|---|
| fuel | string | Fuel type for rates and the estimate. Defaults to Diesel. |
| question* | string | The user's IFTA question in plain language, e.g. 'When is Q3 2026 IFTA due?' or 'What is Kentucky's diesel rate?' |
| jurisdictions | array | Optional, for an estimate: total miles driven and fuel gallons bought in each jurisdiction this quarter. |
{
"type": "object",
"required": [
"question"
],
"properties": {
"fuel": {
"enum": [
"Diesel",
"Gasoline",
"Gasohol",
"Biodiesel",
"Propane",
"LNG",
"CNG",
"Ethanol"
],
"type": "string",
"description": "Fuel type for rates and the estimate. Defaults to Diesel."
},
"question": {
"type": "string",
"description": "The user's IFTA question in plain language, e.g. 'When is Q3 2026 IFTA due?' or 'What is Kentucky's diesel rate?'"
},
"jurisdictions": {
"type": "array",
"items": {
"type": "object",
"required": [
"code",
"miles",
"gallons"
],
"properties": {
"code": {
"type": "string",
"description": "Two-letter state or province code, e.g. 'KY'."
},
"miles": {
"type": "number",
"minimum": 0
},
"gallons": {
"type": "number",
"minimum": 0,
"description": "Gallons bought in that jurisdiction (tax-paid at the pump)."
}
},
"additionalProperties": false
},
"maxItems": 58,
"description": "Optional, for an estimate: total miles driven and fuel gallons bought in each jurisdiction this quarter."
}
},
"additionalProperties": false
}