Pay Off Mortgage vs. Invest

Compare the net wealth impact of putting extra cash toward your principal versus investing it in the market.

Net Wealth Modeling Canadian Math

1. The Mortgage

$
%
Yrs

2. The Decision

$
This is the cash you are deciding what to do with.

3. The Market Alternative

%
Advanced Settings
Used for RRSP/Taxable.
Calculates Today’s Dollars.
Enable “Flywheel” Reinvestment
If you pay off the mortgage early, reinvest your old monthly payment into the market for the remaining years.
Disclaimer for Planning Purposes This calculator estimates net wealth impacts using standard Canadian semi-annual mortgage compounding and fixed monthly investment returns. It applies a 50% capital gains inclusion rate proxy for taxable accounts. Market returns fluctuate, and mortgage rates will change upon renewal. Always consult a financial professional before making binding capital allocation decisions.
Pay Off vs. Invest Calculator Compare Net Wealth
Learn how it works →

Free Pay Off Mortgage vs. Invest Calculator

This question shows up for Canadians at every stage: a renewal is coming up, your cash flow has improved, or you are staring at a mortgage balance and thinking, “Should I throw extra money at this, or should I invest it and let compounding do the work?” This calculator makes that choice easier by modelling both paths side-by-side to show you the estimated long-term net wealth advantage.

What this calculator does

This tool compares two realistic strategies using the exact same extra cash flow. In the mortgage-first scenario, your extra money is applied to your principal to reduce the balance faster. In the invest-first scenario, your mortgage stays on its normal schedule, and your extra money is invested.

It accounts for Canadian semi-annual compounding, marginal tax rates, and even models the “flywheel” effect of reinvesting your freed-up mortgage payments after you become debt-free.

Why this calculator is useful

The math between guaranteed debt reduction and variable market returns is notoriously difficult to calculate in your head.

Instead of guessing, you can stress-test different market returns against your actual mortgage rate to see exactly which decision builds more wealth—and by how much.

How to compare your options

Start by entering your baseline mortgage numbers and the extra monthly cash you have available. Then, set your expected market return and the type of investment account you plan to use (TFSA, RRSP, or Taxable).

The calculator will instantly project both scenarios over the remaining life of your mortgage. Try tweaking your expected return—running a conservative (4%), expected (6.5%), and optimistic (8%) scenario is a great way to see how sensitive your decision is to market performance.

When to choose each path

Paying off your mortgage creates a guaranteed return equal to your interest rate. In Canada, that return is effectively tax-free because you are not paying tax on the interest you avoid. It usually wins when your mortgage rate is high, when you value certainty, or when carrying debt creates stress.

Investing first tends to win when your expected long-run return is meaningfully higher than your mortgage rate, especially inside tax-sheltered accounts. However, this path requires the discipline to consistently invest the extra money and ride out market volatility rather than spending it.

Helpful next steps

If your goal is specifically to reduce your amortization and test lump-sum strategies, use the dedicated Mortgage Payoff Calculator. If you decide to invest, but aren’t sure which account is best, the RRSP vs TFSA Decision Helper is the perfect companion tool. You can also run your monthly contribution through the TFSA Growth Calculator to visualize long-term compounding, or track the total impact of your choices with the Net Worth Tracker.

Planning note

This calculator provides estimates based on standard Canadian compounding and uses a simplified tax-drag proxy for taxable and RRSP accounts. Investment returns are not guaranteed, and real portfolios include ups and downs. The purpose of this tool is to help you understand the mathematical trade-offs so you can make an informed capital allocation decision.

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