The Bank of Canada’s Overnight Rate: What It Is and Why It Matters

Thursday Aug 07th, 2025

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The Bank of Canada’s Overnight Rate: What It Is and Why It Matters

Why Interest Rates Matter to You

Interest rates affect almost every aspect of your financial life—from how much you pay on your mortgage to what you earn on your savings. And at the centre of it all is one important number: the Bank of Canada’s overnight lending rate.

Once a term mostly used by economists and bankers, the overnight rate has become part of everyday conversations. That’s because it has a real impact on how we borrow, spend, save, and invest—especially when it comes to the cost of homeownership. So how does it actually work?

What Is the Overnight Lending Rate?

The overnight lending rate (or key policy rate) is the interest rate big banks charge each other for short-term loans—typically just one day. The Bank of Canada sets a target for this rate, and it influences nearly all other short-term interest rates in the economy. That includes variable-rate mortgages, lines of credit, and business loans.

How the Bank Keeps It on Track

The Bank of Canada doesn’t just set a rate and walk away. It manages the overnight rate by creating a target range—usually about 0.5% wide—and using tools like buying or selling government securities to keep the rate within that band. This process helps control the flow of money in the economy.

Why the Rate Changes

The Bank’s main job is to keep inflation stable, with a target of around 2%.

  • If inflation is climbing too quickly or the economy is growing too fast, the Bank raises rates to cool things down.

  • If the economy slows or inflation drops, the Bank lowers rates to encourage more borrowing and spending.

  • These moves help keep the economy balanced and predictable.

What We Learned During COVID-19

In early 2020, when the pandemic hit, the Bank of Canada responded quickly—cutting the overnight rate from 1.75% to 0.25% to support the economy. This was the lowest it could realistically go without causing disruptions.

The result?

  • Mortgage rates dropped to historic lows.

  • Loans and lines of credit became more affordable.

  • Businesses were able to access cheaper financing.

These emergency cuts helped keep the economy moving at a time of great uncertainty, though they also laid the groundwork for inflation and a highly competitive housing market in the years that followed.

What It Means for You

Even though the overnight rate works behind the scenes, it directly affects your bottom line:

  • Borrowing Costs: Variable-rate mortgages and credit lines are tied to the overnight rate. When it goes up, so do your payments. When it drops, you save money.

  • Savings and Investments: High rates mean better returns on GICs and savings accounts. Lower rates usually push people to look for higher returns in riskier investments.

  • Housing Market: When rates are low, demand for homes tends to rise—and so do prices. When rates are high, borrowing is more expensive, and the market can cool off.

Where Things Stand Today (August 2025)

Right now, the overnight rate is 2.75%. This follows a series of cuts in 2024 meant to help the economy bounce back. But the road ahead is anything but simple.

The Bank of Canada is walking a fine line: inflation is still a concern, and new trade tensions—particularly with the U.S.—are adding pressure. Recent U.S. tariffs on Canadian steel, aluminum, and energy have triggered retaliatory moves from Canada, making things more expensive for businesses and adding uncertainty to the economic outlook.

What to Watch Going Forward

The Bank of Canada updates its rate policy eight times a year. While no major changes are expected in the short term, the direction of rates still matters—especially if you’re buying a home, renewing a mortgage, or making investment decisions.

Staying informed about the overnight rate gives you a clearer picture of what’s ahead—and helps you make smarter financial choices, no matter where the market goes.

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