Why do self-employed Canadians pay both portions of CPP?

Arsen Accounting Services · Question 131 · Sources checked October 29, 2026

Browse self-employment and business records →

When you are self-employed, there is no separate employer funding the other half of your Canada Pension Plan contribution. You generally pay both portions through your personal return, subject to the applicable earnings limits, age rules, and other exceptions.

Budget for more than income tax

CPP is calculated using pensionable earnings, including net self-employment income. Annual maximums and the additional CPP components matter. Contributions already made through employment also need to be considered when you have a job and a side business.

The personal return provides the applicable deductions and credits for contributions. That does not mean the contribution disappears from the cash you need to set aside. Quebec Pension Plan rules require a separate provincial analysis where relevant.

Official guidance: [1], [2], [3].

A planning example

Someone leaves salaried employment and starts consulting at a similar gross income. Comparing only income-tax brackets can understate the required cash reserve because the business owner now funds both CPP portions. The estimate should use expected net profit, not gross client invoices.

Prepare an annual estimate

• Forecast sales and supported business expenses.
• Include pensionable employment income and CPP already deducted.
• Note your age and any CPP-related election or exception.
• Review instalments and payments already made.

Ask your preparer to show income tax and CPP separately in the estimate. Update it when business profit changes materially. A flat percentage of every deposit may be a useful saving habit, but it is not a substitute for an annual calculation using the correct thresholds and your full income picture. Keep the estimated amount in the business cash-flow plan.