Key Takeaways

  • Your nominal return is the percentage on your statement; your real return is what is left after inflation — roughly nominal minus inflation, exactly (1 + nominal) ÷ (1 + inflation)
  • A $10,000 investment earning 7% with 3% inflation really gains about 3.9%, not 7% — its purchasing power grows to about $10,388, not $10,700.
  • In a non-registered account, tax is charged on the full nominal gain, so a "safe" GIC can quietly lose purchasing power after inflation and tax; inside a TFSA there is no tax on th

Your Investment Is Up 7%. So Why Aren't You 7% Richer?

You open your investment statement. Your portfolio is up 7%.

Not bad. Your money is growing.

But there's a problem: your account balance and your buying power aren't growing at the same speed.

That 7% is your nominal return — what your investment earned before inflation.

Your real return tells a different story. It measures how much more your money can actually buy after prices rise.

And sometimes, an investment that looks profitable is quietly making you poorer.

The Math: What You Earn vs. What You Keep

Here's the quick calculation:

Real return ≈ nominal return − inflation

If your investment earns 7% and inflation is 3%, your real return is roughly 4%.

Simple enough. But there's a more accurate formula:

Real return = (1 + nominal) ÷ (1 + inflation) − 1

Using those numbers:

1.07 ÷ 1.03 − 1 = 3.88%

Not 4%.

The difference is small here — about an eighth of a percentage point — but grows as inflation climbs.

At the inflation rates Canada experienced earlier this decade, that gap mattered.

Your $10,000 Investment: The Money You Never Really Made

Imagine investing $10,000.

One year later, your investment has earned 7%, while inflation has climbed 3% — close to the top of the Bank of Canada's 1% to 3% control range.

Here's what happens:

  • Your statement says: $10,700. You've earned $700.
  • Inflation says: Everything costs 3% more.
  • Your actual buying power: $10,700 ÷ 1.03 = $10,388 in today's dollars.
  • Your real gain: Just $388, or 3.88%.

You made $700 on paper.

But only $388 increased your purchasing power.

Nobody stole the difference. There was no hidden fee.

Inflation simply made your money worth less.

And that's before taxes enter the picture.

The Double Hit: When Inflation and Taxes Team Up

Here's where even cautious investors can lose money without realizing it.

Suppose you buy a non-registered GIC paying 4% interest.

Inflation is running at 3%.

Before taxes, you're earning about 1% in real terms.

Not exciting, but at least you're ahead.

Then the CRA gets involved.

Interest earned in a non-registered account is taxed annually at your full marginal tax rate.

And here's the catch: the CRA taxes your entire nominal gain, including the portion that merely kept pace with inflation.

Inflation isn't deductible.

So even though 3 percentage points of your 4% return simply offset rising prices, the tax system still treats the whole 4% as income.

At a 30% marginal tax rate, your 4% GIC return falls to 2.8% after tax.

Inflation? Still 3%.

Your real after-tax return is approximately −0.2%.

Think about that.

Your bank balance increased. Your purchasing power decreased.

Repeat that over a decade of retirement savings, and an investment you considered "safe" may have quietly cost you real money.

The TFSA Advantage: Same GIC, Different Ending

Now put that same GIC inside a TFSA.

Same 4% return. Same 3% inflation.

But there's no tax on the interest.

Your real return stays around 1%, instead of slipping below zero.

Same investment. Different account. Different outcome.

An RRSP also changes the tax picture, but differently: it defers taxes rather than eliminating them.

The lesson? Where you hold an investment can matter almost as much as what you invest in.

How to Find Your Real Investment Return

You don't need a financial calculator or an economics degree.

Just two numbers:

Your annual investment return, available on your brokerage or bank statement, and inflation over the same period, measured using Statistics Canada's consumer price index.

The Bank of Canada tracks inflation against its 2% target.

Here's the calculation:

  1. Convert percentages into decimals: 7% becomes 0.07, and 3% becomes 0.03.
  2. Calculate (1 + your return) ÷ (1 + inflation).
  3. Subtract 1 to get your real return.
  4. For a non-registered account, also calculate your after-tax nominal return using the marginal tax rate applicable to that income, then adjust for inflation.

Check once a year.

If your real return is negative, your investment may be growing in dollars while shrinking in purchasing power.

That's your signal to examine your asset mix, account choices and fees.

The Twikup Take

A 7% investment gain looks great on a statement. But if inflation eats 3%, you haven't become 7% wealthier.

And if taxes take another bite, even a supposedly safe investment can leave you behind.

Don't celebrate the number your investment statement shows. Celebrate what your money can actually buy.

This article is educational information, not financial advice. Figures are simplified examples; your tax rate, account types and returns will differ. Consider speaking with a licensed financial advisor about your own situation.

Image: AI-generated illustration.

Sources