Why investing in RRSPs makes sense for many Canadians


Jamie Golombek: RRSPs allow us to earn effectively tax-free investment income, and that’s not a typo: tax free, not merely tax deferred

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The registered retirement savings plan (RRSP) contribution deadline of March 1 is almost upon us, but some are questioning whether this age-old investing vehicle has merit.

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Let me try to un-muddy the waters by suggesting that RRSPs are likely the best way for many Canadians to save for retirement. After all, an RRSP, just like a tax-free savings account (TFSA), allows us to earn effectively tax-free investment income. And that’s not a typo: tax free, not merely tax deferred.

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For decades, some readers have tried to convince me that RRSP investment income is merely tax deferred since you must pay tax on the funds when they are withdrawn from the RRSP, or, ultimately, from its successor, the registered retirement income fund (RRIF).

But if you go back to basics, and really think about what’s happening with an RRSP contribution, you will soon realize the investment return on your net RRSP contribution is mathematically equivalent to the tax-free return you could achieve with a TFSA, ignoring, for now, changes in tax rates. And, provided the time horizon is long enough, RRSPs can beat non-registered investing even if your marginal tax rate is higher in the year of withdrawal than it was when you contributed.

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Let’s start with a basic example. Sarah has three choices when it comes to investing $1,000 of her 2023 employment income for her retirement: a TFSA, an RRSP or a non-registered investment account. Her 2023 marginal tax rate is 30 per cent, and she expects to be able to generate an annual rate of return of five per cent on her investments.

If Sarah wants to contribute $1,000 of her income to a TFSA, she first needs to pay tax at her marginal rate of 30 per cent on that income, leaving her with $700 to contribute. Using a five-per-cent annual rate of return, her TFSA will grow to $1,857 at the end of 20 years, and, because it’s in a TFSA, the entire $1,857 can then be withdrawn tax free. Her after-tax rate of return of five per cent is, naturally, equivalent to her pre-tax rate of return because the funds are withdrawn tax free.

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Now, let’s say Sarah chooses to invest that $1,000 by making a tax-deductible contribution to her RRSP. Because of the tax deduction, she can put the full $1,000 to work. Keep in mind that 30 per cent (assuming her tax rate doesn’t change upon retirement) of the funds in her RRSP account effectively belong to the government by way of deferred taxes that will apply on both her initial contribution and on the sheltered income and growth in the RRSP.

Both an RRSP and TFSA will beat a non-registered account if your tax rate today is the same as the tax rate in the future.
Both an RRSP and TFSA will beat a non-registered account if your tax rate today is the same as the tax rate in the future. Photo by Getty Images/iStockphoto

Applying the same annual rate of return of five per cent over the next 20 years, with no annual taxation, Sarah will be able to accumulate an RRSP worth $2,653. But, alas, not all the RRSP funds are hers to spend. The piper must be paid. When Sarah withdraws the $2,653 from her RRSP, and assuming her marginal tax rate is still 30 per cent, she will pay $796 in tax, netting her $1,857 after tax from her RRSP. This is equivalent to a five-per-cent annual after-tax rate of return on her $700 net initial investment ($1,000 contribution less $300 in deferred taxes on that initial investment).

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In other words, Sarah’s after-tax rate of return of five per cent is exactly equal to her pre-tax rate of return, meaning she essentially has paid no tax whatsoever on the growth of her initial $700 net RRSP investment for 20 years. The RRSP allowed her to save for retirement on an effectively tax-free basis.

Now, if Sarah instead invests that $1,000 in a non-registered investment account, she will first need to pay tax, leaving her with $700 to invest. If this $700 earns five-per-cent income annually that’s taxed at a rate of 30 per cent, her non-registered account at the end of 20 years will be worth only $1,393 — significantly less than the $1,857 in her TFSA or RRSP.

These examples clearly show that both an RRSP and TFSA will beat a non-registered account if your tax rate today is the same as the tax rate in the future. If, however, your future tax rate is lower than it was in the year of contribution, you will get an additional advantage when using the RRSP because you can deduct your contribution at a high rate, but pay tax at a lower rate when you take it out. Conversely, if your tax rate is low now, but expected to be higher in the future, then the TFSA will produce the better result.

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Some commentators have suggested that building up too much money in an RRSP or its successor, a RRIF, could very well be a bad thing because of the potentially high tax rate associated with withdrawals as well as the potential loss of government benefits, such as Old Age Security.

To this I would say that even taxpayers who are in a relatively low tax bracket today should consider contributing any extra savings to their RRSP once they’ve fully exhausted their TFSA contribution room. That’s because, depending on the rate-of-return assumption, the number of years of tax-free compounding available, as well as the types of investment income you might otherwise earn by saving an equivalent amount in a non-registered account, the benefits of the tax-free compounding can outweigh the additional tax cost of a higher withdrawal tax rate.

Jamie Golombek, CPA, CA, CFP, CLU, TEP, is the managing director, Tax & Estate Planning with CIBC Private Wealth in Toronto. [email protected].

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