# Calculate Australian PAYG instalments

Calculate a PAYG instalment from an amount or rate supplied by the customer. The tool does not estimate or replace an amount issued to the business.

Canonical: https://aroai.com/tools/au_payg_instalments/

## Tool reference

MCP tool ID: `au_payg_instalments`. Availability: Live. Country: Australia.

Credit use: 1 credit.

## Input schema

```json
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "tax_year": {
      "type": "string",
      "enum": [
        "2025-26",
        "2026-27"
      ]
    },
    "method": {
      "type": "string",
      "enum": [
        "amount",
        "rate"
      ]
    },
    "ato_issued_amount": {
      "type": "number",
      "minimum": 0,
      "maximum": 100000000
    },
    "ato_issued_rate": {
      "type": "number",
      "minimum": 0,
      "maximum": 1,
      "description": "Enter a decimal fraction, for example 0.085 for 8.5%."
    },
    "instalment_income_ex_gst": {
      "type": "number",
      "minimum": 0,
      "maximum": 100000000
    }
  },
  "required": [
    "tax_year",
    "method"
  ],
  "additionalProperties": false
}
```