One of the most frustrating aspects of terminal tax return preparation and filing is observing how clients could have benefited from planning during their lifetime, yet instead arrive at death with substantial registered assets and unrealized capital gains that become exposed to the highest marginal tax rates. All of it is avoidable, had they benefited from tax planning during their life.
In many cases, the objective throughout life and retirement was simple: keep taxable income as low as possible. Advisors and taxpayers often focus heavily on avoiding the Old Age Security clawback, minimizing annual taxes payable and preserving government benefits. While understandable, this approach can unintentionally create a far larger tax problem later — one that reduces the after-tax wealth transferred to beneficiaries.
The issue is particularly evident when preparing terminal returns for individuals who accumulated substantial RRSPs, RRIFs and non‑registered investment portfolios over decades, yet withdrew only the minimum required amounts in retirement or continually deferred realizing accrued gains.
Consider a widowed retiree who suffers a major stroke at age 76. Although the retiree survives and continues living independently, medical professionals indicate to the family that statistically there is about a 65–70% likelihood that the retiree will pass away within the next four to five years due to complications and declining health.
The retiree has a RRIF valued at $2.4 million; a non-registered investment portfolio with $1.1 million of unrealized capital gains; a principal residence worth $2 million; modest annual living expenses and no debt. She has CPP, OAS and investment income, placing her close to the OAS repayment threshold.
Despite the materially changed health outlook, the retiree’s tax planning objective remained unchanged: avoid the OAS clawback and minimize annual taxes. As a result, only minimum RRIF withdrawals are taken, and appreciated securities remain largely untouched.
Over the next four years, investment growth continues. By the date of death, the RRIF has grown to approximately $2.7 million and unrealized capital gains exceed $1.4 million.
The terminal return now includes full RRIF income inclusion and deemed disposition of non-registered investments.
The result is a terminal tax liability approaching — or exceeding — $1.5 million, depending on the province of residence and available deductions.
By maintaining a focus on annual tax minimization, the retiree lost the opportunity to spread income across graduated marginal tax brackets during her lifetime. In hindsight, the planning failure was not one of investment returns but of tax-rate management.
A better approach
Following the stroke, assume the retiree and her advisors reassess the situation. Rather than continuing the minimum withdrawal and capital gains deferral philosophy, they adopt a controlled marginal-rate utilization strategy over the next four years.
The objective is not to eliminate tax but to control when and at what rates income is taxed.
The revised strategy includes:
- Larger annual RRIF withdrawals.
- Strategic realization of capital gains.
- Partial gifting to adult children and/or charities.
- Use of TFSAs where possible.
- Increased discretionary spending and family assistance.
- Deliberately maintaining taxable income near, but not materially above, the top marginal tax bracket.
Under this plan, the retiree intentionally increases annual taxable income from approximately $90,000 to roughly $250,000 annually. Consequently, the income would have been taxed incrementally across multiple years rather than compressed into a single terminal return.
This results in full OAS clawback; higher annual taxes during life; reduced RRIF balances over time; and lower exposure to future deemed dispositions.
Why this can work
The planning advantage is not merely about reducing taxes. It is about improving overall tax efficiency and outcome certainty by:
- Leveraging lower marginal tax brackets while alive.
- Reducing exposure to the highest marginal tax rates on death.
- Converting fully taxable RRIF income into more tax-efficient capital gains.
- Providing liquidity and support to family earlier.
- Improving post-tax wealth transfer certainty.
Canada’s progressive tax system is designed around marginal tax brackets and penalizes income compression in a single tax year. When substantial income is recognized all at once upon death, a disproportionate amount becomes exposed to the top marginal rates.
By contrast, deliberately triggering income over several years can allow taxpayers to utilize lower and mid-tier tax brackets repeatedly.
The time value of money
Many retirees and advisors view tax deferral as automatically beneficial because paying tax later appears preferable to paying tax today. They argue that the time value of money supports this approach.
However, this assumption weakens considerably when: mortality risk materially increases; deferred income amounts are likely to be taxed at the highest marginal rates; and the remaining deferral period is short and there is no spousal/dependent rollover available.
At that point, continued tax deferral may no longer represent true tax efficiency. It may simply represent delayed recognition of an inevitable liability.
The emotional obstacle
One of the biggest barriers to implementing this type of planning is psychological. Clients often become emotionally attached to avoiding the OAS clawback, fixated on the idea that minimizing annual tax is always the optimal strategy. They may also be reluctant to confront a finite or approaching time horizon.
By contrast, terminal tax liabilities are deferred, less visible, often poorly understood and viewed as future estate problems.
The cost of this emotional discomfort is significant. And the after-tax value of the estate bears the consequences.
Equally important is the estate administration burden created by large terminal tax liabilities. Executors are frequently forced to liquidate investment portfolios quickly to fund tax obligations. Illiquid assets may need to be sold under unfavourable conditions. Beneficiaries who expected substantial inheritances are often surprised by how much disappears to taxation.
Aggressive income acceleration is not always appropriate. Longevity uncertainty remains one of the most difficult planning variables. Some individuals with shortened life expectancy ultimately live many additional years.
However, these uncertainties reinforce the importance of dynamic planning rather than rigid adherence to annual tax minimization. When health circumstances change, planning assumptions should too.
For many retirees, especially those with large RRIFs and significant accrued gains, the real planning risk is not paying too much tax while alive. It is waiting too long to pay it.
The strategy that produces the lowest annual tax bill ultimately results in a higher total tax burden over a client’s lifetime.
