BMO Line of Credit Interest Rates in Canada

How BMO Line of Credit Rates Are Determined

The interest rate on a BMO line of credit is a variable rate based on the bank's Prime Rate. BMO's Prime Rate, also known as the prime lending rate, is the annual rate used to set variable interest rates for loans and lines of credit. As of October 2026, this rate is 4.45%. A spread, often called an adjustment factor, is added to this prime rate to determine the final rate offered to a customer. This spread can be a discount, a premium, or equal to the prime rate itself, resulting in a final rate that may be lower or higher than the published prime. The size of this spread is influenced by the type of loan, the borrower's credit profile, and whether the line of credit is secured by an asset like a home.

For unsecured personal lines of credit, the spread is typically a premium added to the prime rate. BMO publishes example rates for unsecured lines based on credit tiers, such as Prime plus 3.25 percent for good credit, which equates to 9.95 percent annual percentage rate. For a homeowner's line of credit or a home equity line of credit, which are secured by real property, the starting rate is often more competitive. Business lines of credit can have rates as low as BMO Prime plus 2 percent, reflecting the secured nature and commercial purpose of the borrowing. The final personalized rate for any product can vary based on property location, loan amount, and other individual variables.

Current Rate Examples and Ranges

BMO offers several lines of credit, each with its own typical interest rate range tied to the prime rate. These rates are variable and will fluctuate when BMO changes its prime rate. For unsecured personal lines of credit, the advertised rates are directly linked to a customer's creditworthiness. A borrower with good credit might be offered a rate of BMO Prime plus 3.25 percent, which with a prime rate of 4.45 percent results in an annual percentage rate of 9.95. A borrower with average credit could see a rate of Prime plus 6.25 percent, or 12.95 percent APR, while a borrower with poor credit might be offered Prime plus 9.25 percent, equating to 15.95 percent APR.

For secured borrowing, rates generally start lower. A home equity line of credit from BMO has rates that vary from 6.74 percent APR to 14.81 percent APR. This wide range accounts for differences in the property's condition, the loan-to-value ratio, the loan amount, and the borrower's financial profile. Business lines of credit are advertised with competitive interest rates starting as low as BMO Prime plus 2 percent. It is important to note that all these are example rates, and the actual rate offered to an individual applicant is determined after a full assessment by the bank. Customers are advised to consult a BMO banker for specific pricing in their region.

• Unsecured Personal LOC (Good Credit): Prime + 3.25% (9.95% APR)
• Unsecured Personal LOC (Average Credit): Prime + 6.25% (12.95% APR)
• Unsecured Personal LOC (Poor Credit): Prime + 9.25% (15.95% APR)
• Home Equity Line of Credit (HELOC): 6.74% to 14.81% APR
• Business Line of Credit: Starting at Prime + 2%
• BMO Prime Rate (as of Oct 2026): 4.45%

The Role of BMO's Prime Rate and How It Changes

BMO's Prime Rate is the foundational benchmark for its variable-rate lending products, including lines of credit. This rate is not static and changes in response to monetary policy set by the Bank of Canada. Typically, prime rates across major Canadian banks move in unison, following adjustments to the Bank of Canada's policy interest rate. The Bank of Canada makes rate decisions on a fixed schedule eight times per year. When the central bank announces a change, BMO and other financial institutions usually adjust their prime rates accordingly.

BMO publicly announces its prime rate changes through a press release, typically on the same day as a relevant Bank of Canada decision. The effective date for the new prime rate on BMO loans is usually the business day after the announcement. For example, on October 29, 2025, BMO decreased its prime rate by 0.25 percent from 4.70 percent to 4.45 percent, with the new rate taking effect on October 30, 2025. Any change to BMO's Prime Rate immediately impacts borrowers with variable-rate products. For a borrower with a large balance, such as a $500,000 home equity line, a 0.25 percent decrease in rate could save approximately $104.17 per month in interest costs.

• Bank of Canada rate decisions occur eight times per year.
• BMO announces prime rate changes via press release, usually on the same day as a Bank of Canada change.
• The new prime rate becomes effective the day after the announcement.
• On October 29, 2025, BMO decreased its prime rate by 0.25%.
• The new rate of 4.45% took effect on October 30, 2025.
• A 0.25% rate decrease on a $500,000 balance saves about $104.17 monthly.

What Happens When the Prime Rate Changes

For holders of a BMO variable-rate line of credit, any change in the bank's Prime Rate directly affects their interest cost. If the Prime Rate increases, the interest rate on the line of credit increases by the same amount, as the spread or adjustment factor remains constant. This means the cost of carrying a balance becomes more expensive immediately. Conversely, a decrease in the Prime Rate lowers the interest cost for the borrower. The mechanics of how this change affects a borrower can differ slightly depending on the specific product structure, but the interest calculation on the outstanding balance is updated right away.

It is important to distinguish this from how variable-rate mortgages operate. With a standard variable-rate mortgage, a payment might remain fixed while the interest portion changes, which can affect the loan's amortization. For a line of credit, the required payment is typically interest-only or a small percentage of the balance, so a rate change alters the minimum payment amount. A significant increase in rates could lead to higher required minimum payments. Borrowers should be aware that their line of credit agreement outlines how payments are calculated and how they are affected by rate fluctuations.

Factors That Influence Your Personal Rate

The interest rate offered on a BMO line of credit is not the same for every applicant. The bank assesses multiple factors to determine the risk profile of the borrower and set an appropriate spread over prime. A key factor is the borrower's credit score and credit history, which is why BMO publishes example rates for unsecured credit tied to good, average, and poor credit tiers. Income stability and debt service ratios are also critically examined to ensure the borrower can manage the additional debt. Existing assets and overall financial health contribute to the bank's assessment.

Whether the line of credit is secured or unsecured is perhaps the most significant determinant of the rate. Secured lines of credit, like a HELOC backed by a home, present less risk to the lender because the asset serves as collateral. Consequently, these products generally receive more favourable rates, often closer to or sometimes even below the prime rate. Unsecured lines, which have no collateral, carry higher risk for the bank and therefore command higher interest rates in the form of a larger premium over prime. The loan amount and the purpose of the funds, such as for business investment, can also influence the final offered rate.

• Credit score and credit history (e.g., good, average, or poor credit tier).
• Income stability and debt service ratios.
• Existing assets and overall financial health.
• Whether the line of credit is secured (e.g., by a home) or unsecured.
• The loan amount and the purpose of the funds.
• The property's condition and location for a HELOC.

Comparing Secured and Unsecured Lines of Credit

BMO offers both secured and unsecured lines of credit, and the type you obtain has a major impact on the interest rate, borrowing limit, and terms. A secured line of credit, such as a Homeowner's Line of Credit or a Home Equity Line of Credit, uses an asset like your home as collateral. Because the bank's risk is lower, secured lines typically feature lower interest rates, higher borrowing limits based on the home's equity, and more flexible terms. The rates for a HELOC can range from 6.74 percent to 14.81 percent APR, with the lower end of that spectrum often accessible to borrowers with strong equity and good credit.

An unsecured personal line of credit does not require any collateral. This makes it a riskier product for the lender, which is reflected in higher interest rates and lower credit limits. As noted in BMO's examples, unsecured rates are set at a significant premium over the prime rate, from Prime plus 3.25 percent for good credit up to Prime plus 9.25 percent for poor credit. Business lines of credit can be either secured or unsecured, with secured business lines offering rates as low as Prime plus 2 percent. The choice between secured and unsecured credit involves weighing the need for a lower rate against the requirement to pledge an asset and the amount of funds needed.

Common Questions About BMO Line of Credit Rates

Canadians considering a BMO line of credit often have specific questions about how rates work. Many wonder if they can lock in a fixed rate to avoid future increases. While some BMO loan products may allow you to lock in a fixed interest rate, lines of credit are predominantly variable-rate products. Their interest rates will change whenever BMO's Prime Rate changes. Another common question involves how often the prime rate can change. The Bank of Canada sets its policy rate eight times a year, and BMO typically adjusts its prime rate in alignment with those decisions, meaning potential changes up to eight times annually.

Borrowers also ask if they can negotiate their rate. The spread over prime is based on the bank's assessment of risk, but factors like a strong banking relationship, excellent credit, or a substantial asset base can contribute to a more favourable rate. It is always worth discussing your full financial picture with a BMO banker. Finally, people want to know how a rate change affects their payments. For a line of credit where payments are interest-only or a small percentage of the balance, the minimum payment will adjust with the interest rate. A higher rate leads to a higher minimum payment due, assuming the same outstanding balance.

Frequently asked questions

Sources and further reading

1. BMO Prime Rate October 2026 wowa.ca

This article explains how things work and is not financial, tax or legal advice. Rules, limits and rates change, so check the current figures with the Canada Revenue Agency, your province or your financial institution before you act.