For a regular personal loan it might be close. I can say over the last year my TFSA did a little better than the rate on my line of credit, but that’s just an anecdotal data point. Where it usually makes more sense is something like having a mortgage, which is generally a lower rate, making the minimum payments on a long amortization period and using any extra cash to invest. For a minimal risk investment like GICs and such the return is minimal. For a longer horizon, more volatile equity investments will do better, but also more risky for short term gains.