ForHosting KIT · Developer Utilities

Australian income tax calculator

Australian income tax is a progressive levy on annual taxable income: only the dollars that sit inside each statutory bracket take that bracket's rate, so earning more does not re-tax every earlier dollar at the top rate.

● BetaFree · in your browser

Run — free How it works & API

Use it from WebAPIEmailTelegramApp soon

This Australian income tax calculator accepts annual taxable income in Australian dollars, applies the Australian Taxation Office resident individual rates for the 2026-27 income year, and returns tax payable together with the effective rate as a percent of that income. Negative income is rejected with invalid_input instead of inventing a refund or a negative bill. The same pure parse module powers the free browser widget and the API path, so a household worksheet and an automation never disagree on a bracket edge. Medicare levy, the low income tax offset, and other credits are out of scope so the published ATO table stays comparable to the numbers you see here.

How to use it

Enter your values in the form above. The tool checks them before calculating and shows the result on the same page.

Check your inputs

Use the labels and units shown next to each field. If something is missing or outside the allowed range, the page points to the field to fix.

Use it again or automate it

Use the browser tool for individual checks and the API when you need the same capability in an automated workflow.

What you can do with it

Get an answer now

Enter one set of values and see the result without building a spreadsheet or script.

Compare scenarios

Change one value at a time and rerun the calculation to understand what affects the result.

Automate repeated work

Use the API when the same calculation needs to run inside your product or workflow.

FAQ

How is Australian income tax calculated?

The calculator applies ATO resident individual brackets for 2026-27: nil to $18,200, 15% to $45,000, 30% to $135,000, 37% to $190,000, and 45% above. tax_payable is the progressive sum; effective_rate is 100 times tax payable divided by taxable income.

What happens if taxable income is negative?

The task fails with invalid_input. Annual taxable income must be a finite number greater than or equal to zero. A negative amount is not billed.

Does this include the Medicare levy or tax offsets?

No. The ATO bracket table here excludes the Medicare levy of 2%, the Medicare levy surcharge, the low income tax offset, HELP/HECS repayment, and other credits. It is not tax advice.

Which income year and rates are used?

Resident individual rates for the 2026-27 income year (year ended 30 June 2027), including the reduction of the former 16% rung to 15% from 1 July 2026. Foreign-resident tables are out of scope.

What does the Australian income tax calculator cost?

The browser tool is free. API requests use prepaid KIT balance at $0.002 per successful call; invalid input is not billed.

For developers — API access

Everything on this page is available programmatically. This section is for teams who want to wire it into their own systems; everyone else can just use the tool above.

API endpoint

POSThttps://api.kit.forhosting.com/fin/income-tax-australia

Prefer to automate it? One authenticated POST creates the task; the result comes back by webhook or a signed link. The same capability also runs here on the web, by email and from Telegram — and soon from our app too.

Call it from your stack

curl -X POST https://api.kit.forhosting.com/fin/income-tax-australia \
  -H "Authorization: Bearer $KIT_KEY" \
  -H "Content-Type: application/json" \
  -d '{"taxable_income":80000}'

const res = await fetch("https://api.kit.forhosting.com/fin/income-tax-australia", {
  method: "POST",
  headers: {
    "Authorization": `Bearer ${process.env.KIT_KEY}`,
    "Content-Type": "application/json"
  },
  body: JSON.stringify({
    "taxable_income": 80000
  })
});
const { task_id } = await res.json();

import os, requests

res = requests.post(
    "https://api.kit.forhosting.com/fin/income-tax-australia",
    headers={"Authorization": f"Bearer {os.environ['KIT_KEY']}"},
    json={
    "taxable_income": 80000
},
)
task_id = res.json()["task_id"]

<?php
$res = file_get_contents("https://api.kit.forhosting.com/fin/income-tax-australia", false, stream_context_create([
  "http" => [
    "method"  => "POST",
    "header"  => "Authorization: Bearer " . getenv("KIT_KEY") . "\r\nContent-Type: application/json",
    "content" => '{"taxable_income":80000}',
  ],
]));
$task = json_decode($res, true);

body := bytes.NewBufferString(`{"taxable_income":80000}`)
req, _ := http.NewRequest("POST", "https://api.kit.forhosting.com/fin/income-tax-australia", body)
req.Header.Set("Authorization", "Bearer "+os.Getenv("KIT_KEY"))
req.Header.Set("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)

Example request

{
  "taxable_income": 80000
}

Example response

{
  "task_id": "tsk_a1b2c3d4e5f6a1b2c3d4e5f6",
  "type": "fin.income_tax_australia",
  "status": "queued",
  "_links": {
    "result": "/tasks/tsk_…/result"
  }
}

The API is asynchronous: the call returns a task_id immediately and the result arrives by webhook. Polling is capped at 1 req/s per task.

Pricing

Per request$0.002

Published price — no tokens, no invented credits. A failed task is never charged.

Errors

HTTP	Code	Meaning
`401`	`unauthorized`	Missing or invalid API key.
`402`	`insufficient_balance`	Your balance doesn't cover the task price.
`404`	`unknown_type`	That task type doesn't exist.
`429`	`rate_limited`	Too many requests. Use the webhook instead of polling.

Read the full KIT documentation →