US federal income tax calculator
US federal income tax calculator - brackets, deductions, child tax credit, marginal and effective rate, room to next bracket
Answeringour last check, 2026-10-26
1 of 1checks answered this week
414 msmedian answer time
$0.01listed price per call
$0.01price it asked us
Paid test badge: not yet. The checks above are free: we call the tool without paying and read the payment request it sends back. The Verified badge needs paid calls whose answers match the promised output, and nobody can buy a badge.
Endpoint
GET https://saylorinnovations.com/api/ustax/income
| Category | Everything else |
|---|---|
| Provider host | saylorinnovations.com |
| Networks | eip155:137, eip155:42161, eip155:8453, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp |
| Payment schemes | exact |
| Self-reported calls, 30 days | 1 from 1 payers (the provider's figure, not ours) |
Our checks, last 30 days
| Day | Result | HTTP | Asked | Time |
|---|---|---|---|---|
| 2026-10-26 | valid payment request | 402 | $0.01 | 414 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"filing_status": "single",
"gross_income": "100000",
"qualifying_children": "0",
"tax_year": "2026"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$schema": "https://json-schema.org/draft/2020-12/schema",
"properties": {
"input": {
"additionalProperties": false,
"properties": {
"method": {
"enum": [
"GET"
],
"type": "string"
},
"queryParams": {
"properties": {
"filing_status": {
"description": "optional filing status: single, mfj, mfs or hoh; default single (query)",
"type": "string"
},
"gross_income": {
"description": "gross income, required unless taxable_income is given (query)",
"type": "string"
},
"qualifying_children": {
"description": "optional, children under 17 for the child tax credit (query)",
"type": "string"
},
"tax_year": {
"description": "optional tax year, 2025 or 2026; default 2026 (query)",
"type": "string"
}
},
"required": [
"gross_income"
],
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"adjusted_gross_income": {
"description": "Adjusted gross income",
"type": "number"
},
"brackets": {
"type": "array"
},
"child_tax_credit": {
"description": "Child tax credit",
"type": "object"
},
"current_bracket": {
"description": "Current bracket",
"type": "object"
},
"effective_rate_on_gross_percent": {
"description": "Effective rate on gross, as a percentage",
"type": "number"
},
"federal_income_tax": {
"description": "Federal income tax",
"type": "number"
},
"federal_income_tax_before_credits": {
"description": "Federal income tax before credits",
"type": "number"
},
"filing_status": {
"description": "Filing status",
"type": "string"
},
"formula": {
"description": "Formula used for the calculation",
"type": "string"
},
"gross_income": {
"description": "Gross income",
"type": [
"number",
"null"
]
},
"marginal_rate": {
"description": "Marginal rate",
"type": "number"
},
"net_tax_after_refundable_credits": {
"description": "Net tax after refundable credits",
"type": "number"
},
"next_bracket": {
"description": "Next bracket",
"type": "object"
},
"related_endpoints": {
"description": "Related endpoints",
"type": "array"
},
"scope_note": {
"description": "What this data covers and what it leaves out",
"type": "string"
},
"source": {
"description": "Data source the values come from",
"type": "string"
},
"tax_on_next_1000": {
"description": "Tax on next 1000",
"type": "number"
},
"tax_year": {
"description": "Tax year",
"type": "number"
},
"taxable_income": {
"description": "Taxable income",
"type": "number"
}
},
"required": [
"tax_year",
"filing_status",
"taxable_income",
"federal_income_tax",
"marginal_rate"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}