Leverage Explained: How Borrowing Magnifies Gains and Losses

Two neighbours buy the same kind of asset on the same day, at the same price. This is a hypothetical, not a real story. One pays entirely with savings. The other puts down a fifth and borrows the rest. A year later the price has risen, and the borrower's gain is several times larger than the saver's. A year after that, the price has fallen, and the borrower has lost everything while the saver is only bruised. Same asset. Same market. Completely different lives.

That is leverage. It is one of the most powerful forces in personal finance, and one of the least understood. It sits inside almost every Canadian mortgage, behind most business expansions, and at the heart of nearly every financial crisis in modern history. People who understand it can use it carefully. People who do not understand it often learn about it at the worst possible moment.

You do not need to fear leverage. You need to see it clearly, in both directions, before you rely on it.

Let me show you how it works with simple numbers.

What is leverage in plain terms?

Leverage means using borrowed money to own more of an asset than your own money could buy. If you buy something worth $100 with $20 of your own and $80 borrowed, every change in the asset's price lands on your $20, because the lender is owed its $80 whatever happens. That is why borrowing magnifies results.

The word comes from the lever, a simple tool that lets a small force move a large weight. In finance, your own money is the small force, borrowed money extends the lever, and the asset is the weight. The longer the lever, the more a small movement at one end becomes a large movement at the other.

People measure leverage in a few ways. One common way is the leverage ratio: the value of the asset divided by your own equity in it. In our example, the asset is worth $100 and your equity is $20, so the ratio is five to one. Another way is the loan to value ratio: the loan divided by the asset's value, here 80%. Both say the same thing from different angles. For every dollar of your own, you control five dollars of asset.

The important thing to notice is who carries the change. The lender's claim is fixed at $80 plus interest. It does not grow when the asset grows, and it does not shrink when the asset shrinks. Everything above or below that fixed claim belongs to you. That single fact explains everything that follows.

How does leverage magnify a gain?

Leverage magnifies a gain because the lender's claim stays fixed while the asset's value rises. In the hypothetical where you buy an asset for $100 with $20 of equity and $80 of debt, a sale at $130 leaves $50 after repaying the loan. Your $20 became $50, a 150% gain before interest and costs.

Let me slow this down, because the arithmetic is the lesson. You sell the asset for $130. You repay the lender its $80. What remains, $50, is yours. You started with $20. Your gain is $30 on $20, which is 150%.

Now compare that with the neighbour who paid the full $100 in cash. That neighbour sells for $130, keeps all of it and has gained $30 on $100, which is 30%.

The asset rose 30%. The saver gained 30%. The borrower gained 150%. Same $30 increase in price, measured against a much smaller base of the borrower's own money.

This is the part of leverage everyone likes to talk about. It is real. It is also only half of the story, and it is the half that comes before interest, fees, taxes and time.

How does leverage magnify a loss?

Leverage magnifies a loss for the same reason it magnifies a gain: the lender is repaid first. In the same hypothetical, a sale at $80 repays the $80 loan and leaves nothing. Your $20 of equity is gone, a 100% loss, while the asset itself fell only 20%. A deeper fall can leave you owing money.

Here is the same purchase, laid out across three possible sale prices, before interest and costs.

Look at the bottom row. The asset fell by a fifth. The saver lost a fifth. The borrower lost everything. And if the price had fallen to $70, the sale would not even cover the loan: the borrower would still owe $10 to the lender, plus any interest, with no asset left.

The magnification is symmetrical in percentages, but it does not feel symmetrical in life. A 150% gain is pleasant. A 100% loss can end a business, delay a retirement or strain a marriage. Losses also arrive at bad times: when prices fall, incomes often fall too, and lenders become more careful just when borrowers need patience.

Leverage is a magnifying glass. It does not care which way the light is shining.

How do interest and time change the result?

Interest is the price of the lever, and time multiplies that price. Every year you hold a leveraged asset, interest is owed on the debt whether the asset rises or not. A gain that looks large on paper can shrink a great deal once years of interest are counted, and a flat price becomes a loss.

Let me add an illustrative interest rate of 6% a year on the $80 loan, which is $4.80 a year, and keep it simple by ignoring compounding, fees and taxes. Suppose the asset is eventually sold at $130.

Now suppose the price never moves and you sell at $100 after three years. You repay the $80, but you have also paid $14.40 of interest along the way. Your $20 has become $5.60. The asset went nowhere, and you lost almost three quarters of your money.

Time cuts both ways. Given enough years, a sound asset may well rise. But the borrower must survive every one of those years, paying interest the whole way, without being forced to sell at a bad moment. The saver does not face that clock.

What is a margin of safety, and how does it disappear?

A margin of safety is the cushion between an asset's current value and the point where your equity is wiped out. With 20% of your own money in a purchase, a 20% fall erases your equity. With 50%, the price must fall by half. More equity means a smaller magnified gain but far more room for bad years.

A margin of safety rarely disappears all at once. It usually erodes in steps, and each step can look harmless on its own.

First, the price slips a little. Your equity shrinks faster than the price, but nothing is due yet. Second, interest keeps accruing, quietly eating what is left. Third, if the loan is a margin account or an investment loan with a value test, the lender may ask you to add cash or collateral because the asset no longer supports the debt. This is often called a margin call. Fourth, if you cannot meet that request, the asset may be sold for you, at whatever the market will pay that day. Fifth, the loss is now locked in. Even if prices recover next month, you no longer own the asset.

The cruel part of that sequence is the timing. Forced sales happen when prices are low, which is exactly when a patient owner would have waited. A larger margin of safety does not prevent bad years. It buys you the ability to wait them out.

Here is a simple way to see it. If you put down 20%, you are betting that the asset will not fall more than 20% at any moment when you are forced to sell. If you put down 50%, the bet is about a 50% fall. If you own the asset outright, no lender can force a sale at all. Each choice is reasonable for someone. The point is to make it knowingly.

Why does cheap credit encourage more leverage?

Cheap credit encourages leverage because a lower interest rate lets the same monthly payment carry a larger loan. Borrowers can afford to buy more with debt, and the extra borrowing creates new deposit money and new buyers, which can lift asset prices. Higher prices then support larger loans, and the loop builds on itself until rates or confidence change.

The mechanism starts with how money is created. The Library of Parliament explains that the majority of money in the Canadian economy is created when lenders extend new loans, each loan creating a matching deposit. I walk through that process in how money is created in Canada. When credit is cheap and lenders are willing, more loans are made, more deposits appear, and more of that money looks for assets to buy.

As read on 5 November 2026, the Bank of Canada's policy rate is 2.50%, after a 25 basis point increase announced on 28 October 2026. Rates have been much lower and much higher in living memory. The number matters less than the direction of your thinking: a debt that is comfortable at one rate may not be comfortable at another.

When rates rise, the loop runs in reverse. Payments on variable debt increase. Some buyers step back. Prices can soften. Borrowers who left no margin of safety find that the lever now pushes against them.

What does leverage look like in a Canadian household?

In most Canadian households, leverage takes the form of a mortgage, a home equity line of credit, a car loan or a loan to invest. Each magnifies outcomes on the asset it finances. None is good or bad in itself; what matters is the margin of safety, the interest cost and whether the payment survives a hard year.

The mortgage. A buyer who puts down 20% and borrows 80% has the same five to one leverage as our hypothetical. Most families accept that because they need somewhere to live, and because they plan to hold the home for many years. The risk lies in stretching for the largest possible loan and leaving no room for higher rates, a lost job or a repair.

The home equity line of credit. A line secured by the home lets a family borrow again against the equity it has built. It can be useful for planned expenses. It can also slowly turn a paid-down home back into a leveraged one, with a variable rate that moves.

Loans to invest. Some people borrow to buy investments, sometimes against their home and sometimes through a margin account. The magnification works exactly as in the tables above, with the added risk of a margin call when markets fall.

Leverage strategies involving insurance. There are also arrangements in Canada that borrow to fund life insurance premiums, or that use a policy as collateral for a loan from a third-party lender. They carry real risks: interest rates can rise, dividends are not guaranteed, a lender can change its collateral requirements, and tax rules matter. They are complex, suit only a narrow group of people and are not the subject of this page. If one is ever proposed to you, I suggest you review it with an experienced licensed insurance professional, an accountant and a legal advisor, all of whom understand these contracts.

How does a policy loan fit with the idea of leverage?

A policy loan is debt. The insurer lends you money, uses your policy's cash value as collateral and charges interest at a rate set under the contract. Your risk depends on what you do with the money. Used for planned purchases and repaid with discipline, it is ordinary borrowing. Used to chase a volatile asset, it is leverage.

Nelson Nash, the author of Becoming Your Own Banker®, built The Infinite Banking Concept® around an idea that runs against the leverage culture of easy credit: capitalize first, then use the capital. In other words, build a pool of money before you need it, so that borrowing becomes a choice you make from strength rather than a necessity you accept from weakness. I explain how he framed this in the five rules of Nelson Nash, plus three.

That principle is the opposite of stretching. It asks for patience: years of steady premiums into a participating whole life policy, whose primary purpose is the death benefit and whose early cash value is below the premiums paid. Credited cash value does not fall with markets. Future growth depends on guaranteed values and on dividends, and dividends are not guaranteed. In the plans I design, dividends stay inside the policy as paid-up additions.

Once there is cash value, the insurer will lend against it. Here is what does not change: a policy loan is still a loan. It accrues interest, payable to the insurer. An unpaid balance reduces your net cash value and the death benefit your family would receive. If the balance and its interest grow beyond the cash value, the policy can terminate. I explain the mechanics in policy loans.

So the same discipline applies. Know why you are borrowing. Know how you will repay. Keep a margin. Repay the loan as faithfully as you would repay any outside lender, because the protection your family counts on depends on it.

What this page will not tell you

This page will not tell you whether to borrow, how much leverage suits you, or which loan or investment to choose. Every number in the tables is illustrative, chosen to make the arithmetic visible. Real results include fees, taxes, compounding, changing rates and the price you actually get when you sell, and those vary from person to person.

It also will not tell you how any specific leverage strategy involving insurance would work for you, or what its tax treatment would be. Rates, lending rules and tax rules change. The Bank of Canada figure quoted here is as read on 5 November 2026. Before a major borrowing decision, verify current terms with the lender and review the plan with qualified professionals.

Who this does not suit

Borrowing to buy an asset does not suit a family with unstable income, little emergency money, or debts it already struggles to carry. It does not suit anyone who would be forced to sell after a fall, who cannot afford the interest if rates rise, or who would lose sleep watching magnified losses.

The capital-first approach described near the end of this page also does not suit everyone. A participating whole life policy needs years of steady premiums and a genuine need for life insurance. If you need coverage only for a fixed period at the lowest cost, term insurance may serve you better. And if you are not prepared to repay policy loans with discipline, borrowing against a policy can do more harm than good.

There is nothing wrong with deciding that the lever is not for you. Many families sleep better owning less, outright.

Important Disclosure: This page provides general information and education only and does not constitute personalized financial, insurance, investment, tax or legal advice. All figures are hypothetical illustrations and do not represent actual or projected results. Borrowing to buy an asset magnifies both gains and losses and can result in losses greater than the amount invested. Participating whole life insurance is an insurance product, not an investment, and its primary purpose is the death benefit. Guarantees are contractual guarantees of the issuing insurer, dependent on its financial strength and claims-paying ability, and are not government guarantees. Dividends are not guaranteed; they are declared by the insurer's board based on the performance of the participating account, and past dividends do not indicate future dividends. A policy loan is a debt to the insurer that accrues interest and reduces the net cash value and the death benefit until repaid. Rates and rules change; verify current terms with official sources. The author is a licensed insurance professional who may earn a commission if a policy is purchased.

Here is what that means in plain language. I wrote this page so you can see leverage clearly, not to push you toward it or away from it. The numbers are made up to show the arithmetic, not to predict anything. Borrowing can make a loss bigger than what you put in. A policy is insurance first; its guarantees come from the insurer, not a government, and its dividends are not guaranteed, and a lower dividend slows future growth without reducing cash value already credited. A policy loan is real debt with real interest. And because I can be paid a commission when a policy is placed, please weigh what I say alongside an accountant and a legal advisor who understand these contracts.

If you want to apply these ideas to your own family, start with owning your own pool of capital, which shows what building capital before you need it can look like.

When you are ready to talk it through, I invite you to book a free 30-minute discovery meeting.