Income Tax Brackets API
Overview
To use Income Tax Brackets, you need an API key. You can get one by creating a free account and visiting your dashboard.
GET Endpoint
https://api.apiverve.com/v1/incometaxExample
How to call the Income Tax Brackets API in different programming languages.
curl -X GET \
"https://api.apiverve.com/v1/incometax?country=US&year=2024" \
-H "X-API-Key: your_api_key_here"const response = await fetch('https://api.apiverve.com/v1/incometax?country=US&year=2024', {
method: 'GET',
headers: {
'X-API-Key': 'your_api_key_here',
'Content-Type': 'application/json'
}
});
const data = await response.json();
console.log(data);import requests
headers = {
'X-API-Key': 'your_api_key_here',
'Content-Type': 'application/json'
}
response = requests.get('https://api.apiverve.com/v1/incometax?country=US&year=2024', headers=headers)
data = response.json()
print(data)package main
import (
"fmt"
"io"
"net/http"
)
func main() {
req, _ := http.NewRequest("GET", "https://api.apiverve.com/v1/incometax?country=US&year=2024", nil)
req.Header.Set("X-API-Key", "your_api_key_here")
req.Header.Set("Content-Type", "application/json")
client := &http.Client{}
resp, err := client.Do(req)
if err != nil {
panic(err)
}
defer resp.Body.Close()
body, _ := io.ReadAll(resp.Body)
fmt.Println(string(body))
}{
"status": "ok",
"error": null,
"data": {
"year": 2025,
"country": "US",
"type": "federal",
"brackets": {
"single": [
{
"rate": 0.1,
"min": 0,
"max": 11925
},
{
"rate": 0.12,
"min": 11926,
"max": 48475
},
{
"rate": 0.22,
"min": 48476,
"max": 103350
},
{
"rate": 0.24,
"min": 103351,
"max": 197300
},
{
"rate": 0.32,
"min": 197301,
"max": 250525
},
{
"rate": 0.35,
"min": 250526,
"max": 626350
},
{
"rate": 0.37,
"min": 626351,
"max": 999999999
}
],
"married_filing_jointly": [
{
"rate": 0.1,
"min": 0,
"max": 23850
},
{
"rate": 0.12,
"min": 23851,
"max": 96950
},
{
"rate": 0.22,
"min": 96951,
"max": 206700
},
{
"rate": 0.24,
"min": 206701,
"max": 394600
},
{
"rate": 0.32,
"min": 394601,
"max": 501050
},
{
"rate": 0.35,
"min": 501051,
"max": 751600
},
{
"rate": 0.37,
"min": 751601,
"max": 999999999
}
],
"married_filing_separately": [
{
"rate": 0.1,
"min": 0,
"max": 11925
},
{
"rate": 0.12,
"min": 11926,
"max": 48475
},
{
"rate": 0.22,
"min": 48476,
"max": 103350
},
{
"rate": 0.24,
"min": 103351,
"max": 197300
},
{
"rate": 0.32,
"min": 197301,
"max": 250525
},
{
"rate": 0.35,
"min": 250526,
"max": 375800
},
{
"rate": 0.37,
"min": 375801,
"max": 999999999
}
],
"head_of_household": [
{
"rate": 0.1,
"min": 0,
"max": 17000
},
{
"rate": 0.12,
"min": 17001,
"max": 64850
},
{
"rate": 0.22,
"min": 64851,
"max": 103350
},
{
"rate": 0.24,
"min": 103351,
"max": 197300
},
{
"rate": 0.32,
"min": 197301,
"max": 250500
},
{
"rate": 0.35,
"min": 250501,
"max": 626350
},
{
"rate": 0.37,
"min": 626351,
"max": 999999999
}
]
},
"standard_deduction": {
"single": 15000,
"married_filing_jointly": 30000,
"married_filing_separately": 15000,
"head_of_household": 22500
},
"lastUpdated": "2026-02-05T04:00:00.000Z"
}
}Authentication
The Income Tax Brackets API requires authentication via API key. Include your API key in the request header:
X-API-Key: your_api_key_hereInteractive API Playground
Test the Income Tax Brackets API directly in your browser with live requests and responses.
Parameters
The following parameters are available for the Income Tax Brackets API:
Get Tax Brackets
| Parameter | Type | Required | Description | Default | Example |
|---|---|---|---|---|---|
country | string | required | The country code (currently only 'US' is supported) Length: 2 - 2 chars | - | |
yearPremium | integer | optional | The tax year to retrieve brackets for. Defaults to the previous year. Range: 2000 - 2030 | - |
Response
The Income Tax Brackets API returns responses in JSON, XML, YAML, and CSV formats. The JSON response is shown in the Example section above; alternative formats below.
Other Response Formats
<?xml version="1.0" encoding="UTF-8"?>
<response>
<status>ok</status>
<error xsi:nil="true" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>
<data>
<year>2025</year>
<country>US</country>
<type>federal</type>
<brackets>
<single>
<item>
<rate>0.1</rate>
<min>0</min>
<max>11925</max>
</item>
<item>
<rate>0.12</rate>
<min>11926</min>
<max>48475</max>
</item>
<item>
<rate>0.22</rate>
<min>48476</min>
<max>103350</max>
</item>
<item>
<rate>0.24</rate>
<min>103351</min>
<max>197300</max>
</item>
<item>
<rate>0.32</rate>
<min>197301</min>
<max>250525</max>
</item>
<item>
<rate>0.35</rate>
<min>250526</min>
<max>626350</max>
</item>
<item>
<rate>0.37</rate>
<min>626351</min>
<max>999999999</max>
</item>
</single>
<married_filing_jointly>
<item>
<rate>0.1</rate>
<min>0</min>
<max>23850</max>
</item>
<item>
<rate>0.12</rate>
<min>23851</min>
<max>96950</max>
</item>
<item>
<rate>0.22</rate>
<min>96951</min>
<max>206700</max>
</item>
<item>
<rate>0.24</rate>
<min>206701</min>
<max>394600</max>
</item>
<item>
<rate>0.32</rate>
<min>394601</min>
<max>501050</max>
</item>
<item>
<rate>0.35</rate>
<min>501051</min>
<max>751600</max>
</item>
<item>
<rate>0.37</rate>
<min>751601</min>
<max>999999999</max>
</item>
</married_filing_jointly>
<married_filing_separately>
<item>
<rate>0.1</rate>
<min>0</min>
<max>11925</max>
</item>
<item>
<rate>0.12</rate>
<min>11926</min>
<max>48475</max>
</item>
<item>
<rate>0.22</rate>
<min>48476</min>
<max>103350</max>
</item>
<item>
<rate>0.24</rate>
<min>103351</min>
<max>197300</max>
</item>
<item>
<rate>0.32</rate>
<min>197301</min>
<max>250525</max>
</item>
<item>
<rate>0.35</rate>
<min>250526</min>
<max>375800</max>
</item>
<item>
<rate>0.37</rate>
<min>375801</min>
<max>999999999</max>
</item>
</married_filing_separately>
<head_of_household>
<item>
<rate>0.1</rate>
<min>0</min>
<max>17000</max>
</item>
<item>
<rate>0.12</rate>
<min>17001</min>
<max>64850</max>
</item>
<item>
<rate>0.22</rate>
<min>64851</min>
<max>103350</max>
</item>
<item>
<rate>0.24</rate>
<min>103351</min>
<max>197300</max>
</item>
<item>
<rate>0.32</rate>
<min>197301</min>
<max>250500</max>
</item>
<item>
<rate>0.35</rate>
<min>250501</min>
<max>626350</max>
</item>
<item>
<rate>0.37</rate>
<min>626351</min>
<max>999999999</max>
</item>
</head_of_household>
</brackets>
<standard_deduction>
<single>15000</single>
<married_filing_jointly>30000</married_filing_jointly>
<married_filing_separately>15000</married_filing_separately>
<head_of_household>22500</head_of_household>
</standard_deduction>
<lastUpdated>2026-02-05T04:00:00.000Z</lastUpdated>
</data>
</response>
status: ok
error: null
data:
year: 2025
country: US
type: federal
brackets:
single:
- rate: 0.1
min: 0
max: 11925
- rate: 0.12
min: 11926
max: 48475
- rate: 0.22
min: 48476
max: 103350
- rate: 0.24
min: 103351
max: 197300
- rate: 0.32
min: 197301
max: 250525
- rate: 0.35
min: 250526
max: 626350
- rate: 0.37
min: 626351
max: 999999999
married_filing_jointly:
- rate: 0.1
min: 0
max: 23850
- rate: 0.12
min: 23851
max: 96950
- rate: 0.22
min: 96951
max: 206700
- rate: 0.24
min: 206701
max: 394600
- rate: 0.32
min: 394601
max: 501050
- rate: 0.35
min: 501051
max: 751600
- rate: 0.37
min: 751601
max: 999999999
married_filing_separately:
- rate: 0.1
min: 0
max: 11925
- rate: 0.12
min: 11926
max: 48475
- rate: 0.22
min: 48476
max: 103350
- rate: 0.24
min: 103351
max: 197300
- rate: 0.32
min: 197301
max: 250525
- rate: 0.35
min: 250526
max: 375800
- rate: 0.37
min: 375801
max: 999999999
head_of_household:
- rate: 0.1
min: 0
max: 17000
- rate: 0.12
min: 17001
max: 64850
- rate: 0.22
min: 64851
max: 103350
- rate: 0.24
min: 103351
max: 197300
- rate: 0.32
min: 197301
max: 250500
- rate: 0.35
min: 250501
max: 626350
- rate: 0.37
min: 626351
max: 999999999
standard_deduction:
single: 15000
married_filing_jointly: 30000
married_filing_separately: 15000
head_of_household: 22500
lastUpdated: '2026-02-05T04:00:00.000Z'
| key | value |
|---|---|
| year | 2025 |
| country | US |
| type | federal |
| brackets | {single:[{rate:0.1,min:0,max:11925},{rate:0.12,min:11926,max:48475},{rate:0.22,min:48476,max:103350},{rate:0.24,min:103351,max:197300},{rate:0.32,min:197301,max:250525},{rate:0.35,min:250526,max:626350},{rate:0.37,min:626351,max:999999999}],married_filing_jointly:[{rate:0.1,min:0,max:23850},{rate:0.12,min:23851,max:96950},{rate:0.22,min:96951,max:206700},{rate:0.24,min:206701,max:394600},{rate:0.32,min:394601,max:501050},{rate:0.35,min:501051,max:751600},{rate:0.37,min:751601,max:999999999}],married_filing_separately:[{rate:0.1,min:0,max:11925},{rate:0.12,min:11926,max:48475},{rate:0.22,min:48476,max:103350},{rate:0.24,min:103351,max:197300},{rate:0.32,min:197301,max:250525},{rate:0.35,min:250526,max:375800},{rate:0.37,min:375801,max:999999999}],head_of_household:[{rate:0.1,min:0,max:17000},{rate:0.12,min:17001,max:64850},{rate:0.22,min:64851,max:103350},{rate:0.24,min:103351,max:197300},{rate:0.32,min:197301,max:250500},{rate:0.35,min:250501,max:626350},{rate:0.37,min:626351,max:999999999}]} |
| standard_deduction | {single:15000,married_filing_jointly:30000,married_filing_separately:15000,head_of_household:22500} |
| lastUpdated | 2026-02-05T04:00:00.000Z |
Response Structure
All API responses follow a consistent structure with the following fields:
| Field | Type | Description | Example |
|---|---|---|---|
status | string | Indicates whether the request was successful ("ok") or failed ("error") | ok |
error | string | null | Contains error message if status is "error", otherwise null | null |
data | object | null | Contains the API response data if successful, otherwise null | {...} |
Learn more about response formats →
Response Data Fields
When the request is successful, the data object contains the following fields:
| Field | Type | Sample Value | Description |
|---|---|---|---|
year | number | - | |
country | string | - | |
type | string | - | |
brackets | object | - | |
| [ ] Array items: | array[7] | - | |
â”” rate | number | - | |
â”” min | number | - | |
â”” max | number | - | |
| [ ] Array items: | array[7] | - | |
â”” rate | number | - | |
â”” min | number | - | |
â”” max | number | - | |
| [ ] Array items: | array[7] | - | |
â”” rate | number | - | |
â”” min | number | - | |
â”” max | number | - | |
| [ ] Array items: | array[7] | - | |
â”” rate | number | - | |
â”” min | number | - | |
â”” max | number | - |
Headers
Only X-API-Key is required. Optional headers include Accept for response format negotiation (JSON, XML, or YAML), User-Agent, and X-Request-ID for request tracing. See all request headers →
GraphQL AccessALPHA
Access Income Tax Brackets through GraphQL to combine it with other API calls in a single request. Query only the income tax brackets data you need with precise field selection, and orchestrate complex data fetching workflows.
Credit Cost: Each API called in your GraphQL query consumes its standard credit cost.
POST https://api.apiverve.com/v1/graphqlquery {
incometax(
input: {
country: "US"
year: 2024
}
) {
year
country
type
brackets {
single
married_filing_jointly
married_filing_separately
head_of_household
}
standard_deduction {
single
married_filing_jointly
married_filing_separately
head_of_household
}
lastUpdated
}
}Note: Authentication is handled via the x-api-key header in your GraphQL request, not as a query parameter.
CORS Support
The Income Tax Brackets API accepts cross-origin requests from any origin, so it can be called directly from browser-based applications without a proxy. See CORS support →
Rate Limiting
Income Tax Brackets requests are throttled per minute on the Free plan and unthrottled on paid plans. Exceeding the limit returns 429 Too Many Requests; rate-limit usage is reported in the X-RateLimit-Limit, X-RateLimit-Remaining, and X-RateLimit-Reset response headers. See per-plan limits and best practices →
Error Codes
The Income Tax Brackets API uses standard HTTP status codes — 200 on success, 400 for invalid parameters, 401 for missing or invalid keys, 403 for insufficient credits, 429 for rate-limit exhaustion, and 500/503 for server-side issues. Each error response includes an X-Request-ID header you can quote when contacting support. See full error handling guide →
SDKs for Income Tax Brackets
Official Income Tax Brackets packages on npm, PyPI, NuGet, and JitPack — plus a Postman collection and an OpenAPI spec. See the SDK guide →
No-Code Integrations
Income Tax Brackets works with Zapier, Make, Pipedream, n8n, and Power Automate using the same API key. See setup guides →
Frequently Asked Questions
How do I get an API key for Income Tax Brackets?
How many credits does Income Tax Brackets cost?
Each successful Income Tax Brackets API call consumes credits based on plan tier. Check the pricing section above for the exact credit cost. Failed requests and errors don't consume credits, so you only pay for successful income tax brackets lookups.
Can I use Income Tax Brackets in production?
The free plan is for testing and development only. For production use of Income Tax Brackets, upgrade to a paid plan (Starter, Pro, or Mega) which includes commercial use rights, no attribution requirements, and guaranteed uptime SLAs. All paid plans are production-ready.
Can I use Income Tax Brackets from a browser?
What happens if I exceed my Income Tax Brackets credit limit?
When you reach your monthly credit limit, Income Tax Brackets API requests will return an error until you upgrade your plan or wait for the next billing cycle. You'll receive notifications at 80% and 95% usage to give you time to upgrade if needed.
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