# Business Tax Calculators for Canadian Owners

> Estimate payroll remittances owed to the CRA and corporate income tax for a small business, with rates for every province

Owning a business means two jobs at once: paying tax on the profit and sending the CRA whatever you held back from employees. Slip up on either and interest and penalties follow, so an early estimate saves you trouble. It's cheaper than a late fee.

The [payroll remittance calculator](https://tax-services.ca/calculators/business-tax/payroll-remittance) shows what you owe the CRA on each pay run, both the employee and employer shares.

## Which tool should an owner open first?

The [corporate tax calculator](https://tax-services.ca/calculators/business-tax/corporate-tax-calculator) applies the small business rate to eligible income and the general rate to the rest, using the province where your company is based.

## Which other pages help?

Paying yourself a salary? You'll want to check the [payroll deductions calculator](https://tax-services.ca/calculators/payroll-salary/payroll-deductions-calculator) too. Taking dividends instead? You can compare with the [dividend tax calculator](https://tax-services.ca/calculators/income-tax/dividend-tax) for that. Sole proprietors will find the [self-employed tax calculator](https://tax-services.ca/calculators/income-tax/self-employed-tax) a better fit.

We're adding more business tools over time. Results are estimates, and your accountant should confirm the amounts you file.

## When is the money due?

Remittances fall due on set dates that depend on your remitter type, and late payments carry a penalty that grows with the delay. Keep a record of every pay run so the amounts you send match your year-end slips.

Corporate tax is due within two months after the year end for most companies, or three months for some small ones, while the return itself is filed within six months. Setting money aside each month makes that bill easier to carry, and you won't be scrambling when it lands.

Hiring for the first time? Price the new hire with the [take-home pay calculator](https://tax-services.ca/calculators/payroll-salary/take-home-pay-calculator), the [vacation pay calculator](https://tax-services.ca/calculators/payroll-salary/vacation-pay) and the [overtime pay calculator](https://tax-services.ca/calculators/payroll-salary/overtime-pay).

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Source: https://tax-services.ca/calculators/business-tax
Last updated: 2026-10-01
Independent information site. Not affiliated with the CRA. No services, no guarantee of accuracy. See https://tax-services.ca/disclaimer