The short answer
Investments help build the savings that may later cover the gap between retirement spending and income from CPP, OAS, pensions, work or other sources. The retirement plan gives the portfolio its job. The portfolio's mix, costs and changes in value affect how reliably it may do that job.
Start with the gap the portfolio may need to cover
| Part of the plan | The question it answers |
|---|---|
| Retirement spending | How much monthly spending are you trying to support? |
| Income before savings | How much may come from CPP, OAS, pensions, work or other sources? |
| Amount needed from savings | What may the portfolio need to provide? |
| Time and ending balance | How long may the money need to last, and what amount are you trying to leave? |
Before retirement, contributions and investment returns help build the savings pool. During retirement, withdrawals may begin while the remaining investments continue to rise or fall. The connection changes over time, but it remains one plan.
Different parts of the portfolio can have different jobs
- Money for longer-term growth may help later spending keep up with inflation, but its value can change substantially.
- Steadier money may reduce how much the complete portfolio changes, but usually has lower expected growth.
- Money needed sooner may be kept more accessible, with its own inflation and reinvestment trade-offs.
These are broad roles, not a prescribed mix. The time until the money may be needed, other retirement income and how much spending can change all affect the discussion.
Income from a portfolio is more than interest and dividends
Investment return can include interest, dividends and changes in market value. A retirement withdrawal may come from cash, distributions or selling part of an investment. Focusing only on the amount labelled income can hide the portfolio's total return, diversification, costs and risk.
Expected return and risk belong together
A higher expected return is not a free improvement to a forecast. Investments with more growth potential can also have larger changes in value. Actual returns arrive unevenly, and withdrawals during an early decline can put additional pressure on savings.
- Use a smooth forecast to understand the plan's basic cash-flow direction.
- Use a range of outcomes to see that actual results can differ from the middle path.
- Keep fees, inflation, concentration and withdrawals visible when comparing assumptions.
A checkpoint
Can you describe the portfolio's job in one sentence?
Name what the savings may need to provide, when withdrawals may begin and which spending has room to change. If that is unclear, return to the retirement forecast before adding more investment detail.
Put the pieces together
Review the plan first, then the portfolio.
Your Plan shows the retirement picture. Portfolio lets you record what you own, explore a target and choose which estimate—if any—to use in the plan.
Official sources
Check current information before acting.
- CIRO: Understanding Investment Performance and Returns (opens in a new tab)
- CIRO: Why Diversify Your Portfolio? (opens in a new tab)
- CIRO: Fees and Costs (opens in a new tab)
Sources reviewed August 13, 2026.