instalment_plan
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Determine whether a Canadian individual must pay quarterly income-tax instalments (the $3,000 / $1,800-Quebec net-tax-owing tests) and compute all three CRA payment options (no-calculation, prior-year, current-year) as quarterly schedules with a suggested no-interest choice. Per the CRA's instalment calculation chart, 'net tax owing' EXCLUDES CPP contributions and EI premiums payable — pass those separately as cpp_payable and they are added to the instalment amounts only (chart line 24), never to the threshold test.
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
| current_year_estimate | number | yes | Estimated NET TAX OWING for the CURRENT year, CAD — per the CRA calculation chart: income tax minus amounts withheld, EXCLUDING CPP/EI payable on self-employment income (pass those in cpp_payable, do NOT include them here) |
| prior_year_owing | number | yes | Net tax owing for the prior year, CAD (same chart basis: excludes CPP/EI payable) |
| second_prior_year_owing | number | yes | Net tax owing two years ago, CAD (same chart basis: excludes CPP/EI payable) |
| cpp_payable | number | no | OPTIONAL: current-year CPP contributions and EI premiums payable on self-employment income, CAD. The CRA chart excludes this from the net-tax-owing threshold test but ADDS it to the instalment amounts (chart line 24). Ignored for Quebec residents — QPP/QPIP are billed by Revenu Québec, not the CRA. |
| quebec | boolean | no | Quebec resident (lower federal threshold; amounts cover the FEDERAL side only — Revenu Québec runs a separate instalment system, form TP-1026) |
Raw JSON schema
{
"type": "object",
"properties": {
"current_year_estimate": {
"type": "number",
"minimum": 0,
"description": "Estimated NET TAX OWING for the CURRENT year, CAD — per the CRA calculation chart: income tax minus amounts withheld, EXCLUDING CPP/EI payable on self-employment income (pass those in cpp_payable, do NOT include them here)"
},
"prior_year_owing": {
"type": "number",
"minimum": 0,
"description": "Net tax owing for the prior year, CAD (same chart basis: excludes CPP/EI payable)"
},
"second_prior_year_owing": {
"type": "number",
"minimum": 0,
"description": "Net tax owing two years ago, CAD (same chart basis: excludes CPP/EI payable)"
},
"cpp_payable": {
"type": "number",
"minimum": 0,
"description": "OPTIONAL: current-year CPP contributions and EI premiums payable on self-employment income, CAD. The CRA chart excludes this from the net-tax-owing threshold test but ADDS it to the instalment amounts (chart line 24). Ignored for Quebec residents — QPP/QPIP are billed by Revenu Québec, not the CRA."
},
"quebec": {
"type": "boolean",
"description": "Quebec resident (lower federal threshold; amounts cover the FEDERAL side only — Revenu Québec runs a separate instalment system, form TP-1026)"
}
},
"required": [
"current_year_estimate",
"prior_year_owing",
"second_prior_year_owing"
]
}