How Much Annual Spending Can My Savings Support?

Begin with a benchmark

Multiplying a portfolio by a withdrawal percentage gives a transparent first-year amount. For example, 4% of $1 million is $40,000. That arithmetic is a benchmark, not a conclusion about what the household can safely spend.

Add reliable pension income separately and be clear whether the spending goal is before or after tax. A $40,000 withdrawal is not necessarily $40,000 available for spending because RRSP or RRIF withdrawals are generally taxable while TFSA withdrawals are treated differently.

Be precise about the withdrawal rule

A constant-percentage strategy applies the selected rate to the opening portfolio each year, so the dollar withdrawal falls after a loss and rises after growth. The historical 4% convention instead starts with a percentage of the initial portfolio and then raises that starting dollar amount with inflation.

Those methods produce different spending paths and risks. Calling both the 4% rule hides the trade-off. Chapterwise uses customer-facing names first and keeps the technical definition beside the result.

Connect the benchmark to the household

Government guidance emphasizes that retirement needs depend on desired lifestyle, retirement age, housing, debt and family responsibilities. CPP, OAS, workplace pensions and other income reduce the amount investments must provide, but their start dates and tax treatment matter.

Couples also need a household timeline. Benefits may begin at different ages, registered accounts may belong to different people, and survivor income can differ from income while both partners are alive.

Test flexibility and uncertainty

A useful plan distinguishes essential spending from flexible spending and shows how withdrawals could respond if returns arrive in an unfavourable order. Adaptive guardrails can make those responses explicit, but they cannot guarantee success or eliminate the need to reduce spending.

Compare the benchmark with a lifestyle-shaped plan, detailed tax and benefit timing, and reproducible market paths. Record the assumptions so the result can be revisited rather than treated as permanent.

Limitations

The public calculator does not project returns or future balances and does not decide whether a rate is sustainable. It excludes tax, account sequencing, benefits, a partner, longevity, market uncertainty, care costs and estate goals. Confirm important withdrawal and tax decisions with qualified professionals.

Sources

• Bengen (1994) — Determining Withdrawal Rates Using Historical Data
• Financial Consumer Agency of Canada — Planning and saving for retirement
• Government of Canada — Sources of retirement income