Your 3.2% Mortgage Is Cheaper Than It Looks: The Inheritance Math Ontario High Earners Get Wrong
A $300,000 inheritance landed in your account this morning. Your mortgage balance is $280,000 at 3.2%, locked until 2029. The instinct to clear the debt entirely is so strong you've already opened your bank's website.
Close the tab.
The Spread Nobody Wants to Hear About
Here's what you're actually proposing: convert $280,000 of liquid capital into home equity that pays zero return, in exchange for eliminating a liability that costs 3.2% annually. If you're in Ontario's 43.41% marginal bracket at $150,000 of income, and you could instead place that inheritance into a diversified portfolio yielding 6% over the long term, you're trading a 6% return for a 3.2% savings. The gap is 2.8 percentage points per year. On $280,000, that's $7,840 annually you've just declined.
The mortgage isn't expensive. It's subsidized borrowing in an inflationary environment where you repay the bank with future dollars that are worth less than today's. The 3.2% rate you locked in 2021 or 2022 looks even cheaper when inflation averages 2.5% to 3% over the term. Your real cost of borrowing is near zero, possibly negative.
The TFSA and RRSP Case Nobody Makes
Before a single dollar touches the mortgage, the inheritance should be funnelled into tax-sheltered space. If you haven't maximized your TFSA (cumulative contribution room of roughly $108,000 for those eligible since 2009) or your RRSP (2026 limit: $32,490, or 18% of 2025 income), putting the inheritance there first is not optional. It's the highest-return move available. Growth inside a TFSA is tax-free forever. RRSP contributions generate an immediate refund at your marginal rate, which for someone earning $150,000 in Ontario is 43.41%. A $30,000 RRSP contribution returns $13,023 to you in April.
Once those accounts are full, the question becomes: non-registered investing or mortgage paydown. The mortgage is a guaranteed 3.2% return. Diversified portfolios of Canadian dividend-paying equities have historically returned 6% to 7% annualized over 20-year horizons, based on TSX Composite performance. You're trading certainty for expected value. That trade has favoured the market in every environment except the few years immediately before and during a major correction.
The Liquidity Problem
Money paid into your mortgage principal is locked. Accessing it later requires a home equity line of credit, which will cost you the 2026 prime rate (currently around 5.95%) plus a spread, or a full refinance at whatever the prevailing rate is when you need the cash. If rates have climbed, you've now converted cheap borrowing into expensive borrowing just to access your own capital.
An inheritance sitting in a non-registered account is liquid. You can rebalance, you can tax-loss harvest, you can pull from it in an emergency without asking a bank for permission. If you're 52 and planning to retire at 62, that liquidity might be the difference between retiring on time and working three more years because your wealth is trapped in your walls.
The Objection That Holds Up
Being mortgage-free provides certainty that a six-figure portfolio does not. If the market drops 18% two years after you invest the inheritance, the 3.2% mortgage suddenly looks like the better deal, at least until the recovery. For households where cash flow is tight or where the earner's income is volatile, paying off the mortgage buys stability that has value beyond the spread. This is a real consideration rooted in psychology and household finances.
But for high earners with steady income, the math rarely supports it. The 2.8 percentage point gap compounds. Over ten years, $280,000 invested at 6% grows to $501,590. The same $280,000 used to pay off a 3.2% mortgage saves you $92,640 in interest over the remaining term. The difference is $408,950 in forgone wealth.
A $300,000 inheritance landed in your account this morning. Your mortgage balance is $280,000 at 3.2%, locked until 2029. The instinct to clear the debt entirely is so strong you've already opened your bank's website.
Close the tab.
The Spread Nobody Wants to Hear About
Here's what you're actually proposing: convert $280,000 of liquid capital into home equity that pays zero return, in exchange for eliminating a liability that costs 3.2% annually. If you're in Ontario's 43.41% marginal bracket at $150,000 of income, and you could instead place that inheritance into a diversified portfolio yielding 6% over the long term, you're trading a 6% return for a 3.2% savings. The gap is 2.8 percentage points per year. On $280,000, that's $7,840 annually you've just declined.
The mortgage isn't expensive. It's subsidized borrowing in an inflationary environment where you repay the bank with future dollars that are worth less than today's. The 3.2% rate you locked in 2021 or 2022 looks even cheaper when inflation averages 2.5% to 3% over the term. Your real cost of borrowing is near zero, possibly negative.
The TFSA and RRSP Case Nobody Makes
Before a single dollar touches the mortgage, the inheritance should be funnelled into tax-sheltered space. If you haven't maximized your TFSA (cumulative contribution room of roughly $108,000 for those eligible since 2009) or your RRSP (2026 limit: $32,490, or 18% of 2025 income), putting the inheritance there first is not optional. It's the highest-return move available. Growth inside a TFSA is tax-free forever. RRSP contributions generate an immediate refund at your marginal rate, which for someone earning $150,000 in Ontario is 43.41%. A $30,000 RRSP contribution returns $13,023 to you in April.
Once those accounts are full, the question becomes: non-registered investing or mortgage paydown. The mortgage is a guaranteed 3.2% return. Diversified portfolios of Canadian dividend-paying equities have historically returned 6% to 7% annualized over 20-year horizons, based on TSX Composite performance. You're trading certainty for expected value. That trade has favoured the market in every environment except the few years immediately before and during a major correction.
The Liquidity Problem
Money paid into your mortgage principal is locked. Accessing it later requires a home equity line of credit, which will cost you the 2026 prime rate (currently around 5.95%) plus a spread, or a full refinance at whatever the prevailing rate is when you need the cash. If rates have climbed, you've now converted cheap borrowing into expensive borrowing just to access your own capital.
An inheritance sitting in a non-registered account is liquid. You can rebalance, you can tax-loss harvest, you can pull from it in an emergency without asking a bank for permission. If you're 52 and planning to retire at 62, that liquidity might be the difference between retiring on time and working three more years because your wealth is trapped in your walls.
The Objection That Holds Up
Being mortgage-free provides certainty that a six-figure portfolio does not. If the market drops 18% two years after you invest the inheritance, the 3.2% mortgage suddenly looks like the better deal, at least until the recovery. For households where cash flow is tight or where the earner's income is volatile, paying off the mortgage buys stability that has value beyond the spread. This is a real consideration rooted in psychology and household finances.
But for high earners with steady income, the math rarely supports it. The 2.8 percentage point gap compounds. Over ten years, $280,000 invested at 6% grows to $501,590. The same $280,000 used to pay off a 3.2% mortgage saves you $92,640 in interest over the remaining term. The difference is $408,950 in forgone wealth.
That's not marginal. That's generational.
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