US capital gains tax calculator 2026
US capital gains tax calculator 2026 - 0/15/20% bands, short-term cost, NIIT and room at 0%
Answeringour last check, 2026-10-26
1 of 1checks answered this week
565 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/capital-gains
| 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 | $0.01 | 565 ms |
Example input (from the provider)
{
"method": "GET",
"queryParams": {
"filing_status": "single",
"long_term_gains": "20000",
"taxable_income_before_gains": "40000"
},
"type": "http"
}
Promised output schema (from the provider)
{
"$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"
},
"long_term_gains": {
"description": "optional, net long-term capital gains, default 0 (query)",
"type": "string"
},
"taxable_income_before_gains": {
"description": "optional, ordinary taxable income after deductions, default 0 (query)",
"type": "string"
}
},
"type": "object"
},
"type": {
"const": "http",
"type": "string"
}
},
"required": [
"type",
"method"
],
"type": "object"
},
"output": {
"properties": {
"example": {
"properties": {
"bands": {
"type": "object"
},
"effective_rate_on_long_term_gains_percent": {
"description": "Effective rate on long term gains, as a percentage",
"type": "number"
},
"filing_status": {
"description": "Filing status",
"type": [
"string",
"null"
]
},
"formula": {
"description": "Formula used for the calculation",
"type": "string"
},
"long_term_gains_by_rate": {
"description": "Long term gains by rate",
"type": "object"
},
"long_term_gains_tax": {
"description": "Long term gains tax",
"type": "number"
},
"net_investment_income_tax": {
"description": "Net investment income tax",
"type": "number"
},
"planning": {
"type": "object"
},
"related_endpoints": {
"description": "Related endpoints",
"type": "array"
},
"scope_note": {
"description": "What this data covers and what it leaves out",
"type": "string"
},
"short_term_gain_tax_cost": {
"description": "Short term gain tax cost",
"type": "number"
},
"tax_year": {
"description": "Tax year",
"type": [
"number",
"null"
]
},
"total_federal_tax": {
"description": "Total federal tax",
"type": "number"
}
},
"required": [
"long_term_gains_by_rate",
"long_term_gains_tax",
"net_investment_income_tax"
],
"type": "object"
},
"type": {
"const": "json",
"type": "string"
}
},
"required": [
"type"
],
"type": "object"
}
},
"required": [
"input"
],
"type": "object"
}