Verified Canadian self-employed tax math: SE tax, CPP, GST/HST, instalments, CRA deadlines. Free.
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Compute self-employed CPP contributions for a given year: base + enhanced contributions, CPP2 (second ceiling), total payable, and the tax-deduction vs tax-credit split that goes on the T1 (Schedule 8). Quebec residents pay QPP instead — use estimate_self_employed_tax with province QC for QPP.
Net self-employment income, CAD
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Compute self-employed CPP contributions for a given year: base + enhanced contributions, CPP2 (second ceiling), total payable, and the tax-deduction vs tax-credit split that goes on the T1 (Schedule 8). Quebec residents pay QPP instead — use estimate_self_employed_tax with province QC for QPP.
| Argument | Type | Description |
|---|---|---|
| year* | integer | |
| net_self_employment_income* | number | Net self-employment income, CAD |
{
"type": "object",
"required": [
"year",
"net_self_employment_income"
],
"properties": {
"year": {
"enum": [
2025,
2026
],
"type": "integer"
},
"net_self_employment_income": {
"type": "number",
"minimum": 0,
"description": "Net self-employment income, CAD"
}
}
}Estimate a Canadian self-employed (sole proprietor) person's full tax bill: federal tax, provincial tax, CPP/QPP (incl. CPP2/QPP + QPIP for Quebec), total, after-tax income and effective rate. Fully verified provinces: ON, BC, AB, MB, SK, NS, NB, QC. Other provinces/territories return an honest federal+CPP-only partial estimate flagged supported:false.
| Argument | Type | Description |
|---|---|---|
| year* | integer | Tax year |
| province* | string | Two-letter province/territory code |
| net_self_employment_income* | number | Net self-employment income (after expenses), CAD |
{
"type": "object",
"required": [
"year",
"province",
"net_self_employment_income"
],
"properties": {
"year": {
"enum": [
2025,
2026
],
"type": "integer",
"description": "Tax year"
},
"province": {
"enum": [
"ON",
"BC",
"AB",
"MB",
"SK",
"NS",
"NB",
"QC",
"PE",
"NL",
"YT",
"NT",
"NU"
],
"type": "string",
"description": "Two-letter province/territory code"
},
"net_self_employment_income": {
"type": "number",
"minimum": 0,
"description": "Net self-employment income (after expenses), CAD"
}
}
}Upcoming CRA tax deadlines for Canadian freelancers / self-employed individuals (filing, payment, GST/HST, RRSP, quarterly instalments), each on its CRA effective date with the weekend next-business-day rule applied. Also available as a subscribable calendar feed.
| Argument | Type | Description |
|---|---|---|
| limit | integer | Max deadlines to return (default 10) |
{
"type": "object",
"properties": {
"limit": {
"type": "integer",
"maximum": 40,
"minimum": 1,
"description": "Max deadlines to return (default 10)"
}
}
}Check whether a Canadian small business / freelancer must register for GST/HST under the $30,000 small-supplier tests (single-quarter test and rolling four-quarter test), with the exact mechanics of when to charge and the registration deadline. Set is_rideshare true for taxi/ride-share drivers (they must register from the first fare).
| Argument | Type | Description |
|---|---|---|
| is_rideshare | boolean | Taxi or commercial ride-share driver |
| quarterly_revenues* | array | Worldwide taxable revenue per calendar quarter, oldest first (up to 8 quarters), CAD |
{
"type": "object",
"required": [
"quarterly_revenues"
],
"properties": {
"is_rideshare": {
"type": "boolean",
"description": "Taxi or commercial ride-share driver"
},
"quarterly_revenues": {
"type": "array",
"items": {
"type": "number",
"minimum": 0
},
"maxItems": 8,
"minItems": 1,
"description": "Worldwide taxable revenue per calendar quarter, oldest first (up to 8 quarters), CAD"
}
}
}Compare the GST/HST Quick Method against the regular method for a Canadian small business: eligibility (revenue ceiling + excluded professions), remittance under each method, and which one keeps more money. Annual figures.
| Argument | Type | Description |
|---|---|---|
| revenue* | number | Annual taxable revenue BEFORE tax, CAD |
| province* | string | Two-letter province code of the permanent establishment (e.g. ON, BC, QC) |
| business_type | string | Free-text business type, e.g. 'services', 'consultant', 'retail goods', 'bookkeeper' (used for the excluded-professions test; goods vs services rate) |
| itc_eligible_expenses_incl_tax | number | Annual ITC-eligible operating expenses INCLUDING tax, CAD (for the regular-method comparison) |
{
"type": "object",
"required": [
"province",
"revenue"
],
"properties": {
"revenue": {
"type": "number",
"minimum": 0,
"description": "Annual taxable revenue BEFORE tax, CAD"
},
"province": {
"type": "string",
"description": "Two-letter province code of the permanent establishment (e.g. ON, BC, QC)"
},
"business_type": {
"type": "string",
"description": "Free-text business type, e.g. 'services', 'consultant', 'retail goods', 'bookkeeper' (used for the excluded-professions test; goods vs services rate)"
},
"itc_eligible_expenses_incl_tax": {
"type": "number",
"minimum": 0,
"description": "Annual ITC-eligible operating expenses INCLUDING tax, CAD (for the regular-method comparison)"
}
}
}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.
| Argument | Type | Description |
|---|---|---|
| quebec | boolean | Quebec resident (lower federal threshold; amounts cover the FEDERAL side only — Revenu Québec runs a separate instalment system, form TP-1026) |
| cpp_payable | number | 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. |
| prior_year_owing* | number | Net tax owing for the prior year, CAD (same chart basis: excludes CPP/EI payable) |
| current_year_estimate* | number | 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) |
| second_prior_year_owing* | number | Net tax owing two years ago, CAD (same chart basis: excludes CPP/EI payable) |
{
"type": "object",
"required": [
"current_year_estimate",
"prior_year_owing",
"second_prior_year_owing"
],
"properties": {
"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)"
},
"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."
},
"prior_year_owing": {
"type": "number",
"minimum": 0,
"description": "Net tax owing for the prior year, CAD (same chart basis: excludes CPP/EI payable)"
},
"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)"
},
"second_prior_year_owing": {
"type": "number",
"minimum": 0,
"description": "Net tax owing two years ago, CAD (same chart basis: excludes CPP/EI payable)"
}
}
}