Tax & Finance

Tax Reference API

Live free tier 2026 IRS seed data loaded; reference only.

Overview

Federal tax brackets, standard deductions, mileage rates, retirement limits, and deadline reference data.

Base URL

https://apidatasets.com/api/v1

GET/api/v1/tax/deadlines

1 credits

Federal individual filing deadline reference.

{
  "data": {
    "type": "tax_deadlines"
  },
  "meta": {
    "credits_used": 1
  }
}

GET/api/v1/tax/federal/brackets

2 credits

IRS-backed federal tax brackets by year and filing status.

{
  "data": {
    "type": "federal_brackets"
  },
  "meta": {
    "credits_used": 2
  }
}

GET/api/v1/tax/mileage-rates

1 credits

Business mileage rate reference value.

{
  "data": {
    "type": "mileage_rates"
  },
  "meta": {
    "credits_used": 1
  }
}

GET/api/v1/tax/retirement-limits

1 credits

401(k) employee contribution limit reference.

{
  "data": {
    "type": "retirement_limits"
  },
  "meta": {
    "credits_used": 1
  }
}

GET/api/v1/tax/standard-deduction

1 credits

Federal standard deduction reference values, optionally filtered by filing status.

{
  "data": {
    "type": "standard_deduction"
  },
  "meta": {
    "credits_used": 1
  }
}

Authorization: Bearer YOUR_API_KEY
X-API-Key: YOUR_API_KEY

All /api/v1 routes require API key authentication and return consistent JSON errors.

IRS tax year 2026 inflation adjustment release and IRS reference pages.

IRS tax year 2026 inflation adjustments Public IRS reference release.

Tax data is reference data only and does not constitute tax, legal, accounting, or financial advice.