If you already have a mortgage and are planning to move to a new home, you may be considering porting your mortgage instead of breaking it. Porting allows you to transfer your existing mortgage—including its interest rate, remaining balance, and term—from your current property to a new one. This can be especially beneficial if your current mortgage rate is lower than today’s market rates, or if breaking your mortgage would incur costly prepayment penalties.

However, one of the biggest questions homeowners ask is: Do you need a down payment when porting a mortgage? The answer depends on the cost of your new home, your existing mortgage balance, and the amount of equity you have. In some situations, you may not need any additional down payment, while in others, you may need additional funds.

What Does It Mean to Port a Mortgage?

Porting a mortgage means that you are transferring your existing mortgage contract to a new property. When you port, you keep the same mortgage rate, lender, and remaining term. The mortgage is simply moved from one property title to another.

For many homeowners, this is an attractive option because it helps avoid:

• Higher current interest rates, and
• Mortgage break penalties (which can be in the thousands).

However, not all mortgages are portable. Most fixed-rate mortgages include a portability feature, while some variable-rate mortgages may not. Before making any decisions, it is wise to confirm the portability terms with your lender or mortgage broker.

Do You Need a Down Payment When Porting Your Mortgage?

You may or may not need a down payment when porting your mortgage. If your new home costs the same or less than your current home and your mortgage balance is sufficient to cover the new home, then no additional down payment is required. However, if you are buying a more expensive home, you will likely need to provide additional funds to cover the price difference.

The need for a down payment depends primarily on the difference between the home price and the equity you have in your current property.

When You Do Not Need a Down Payment

If the price of your new home is equal to or lower than the value of your current home, and your remaining mortgage balance is sufficient to cover the cost, you will likely not need to make any new down payment. In this situation, the mortgage simply transfers over.

Additionally, if you have enough equity built up in your current property, that equity can serve as the down payment on the new home. Equity becomes available after your existing property is sold and any mortgage balance is discharged. This means that even if the new home is slightly more expensive, sufficient equity can eliminate the need for extra out-of-pocket funds.

When You Will Need a Down Payment

A down payment becomes necessary when the new home is more expensive than the remaining balance on your current mortgage. In this case, the difference between the purchase price and your existing mortgage amount must be covered either through:

• Your personal savings
• Your home equity
• Or a top-up mortgage (borrowing additional funds)

However, any additional amount borrowed beyond your original mortgage is typically offered at the lender’s current interest rate, which may be higher. This sometimes results in what is known as a blended rate, where both the old and new rates are combined.

You may also need a down payment if your financial situation has changed. Even though you are porting, your lender will reassess your income, credit score, and overall financial stability. If your ability to repay has weakened, the lender may require a down payment to reduce their risk.

How the Porting Process Works

The porting process involves several key steps. First, you must confirm with your lender that your current mortgage is portable. After this, you will need to sell your current home and apply to have your mortgage transferred to the new property. During this process, the lender will verify your financial documents again.

Once approved, the mortgage is then registered to the new property. Depending on the sale and purchase closing dates, some lenders will allow a grace period—typically 30 to 120 days—during which you can transfer the mortgage without penalty. This timing is important, and coordinating both transactions carefully will help avoid extra fees.

How Home Equity Affects Your Down Payment

Home equity plays a major role in determining whether a down payment is required. Equity is the portion of your home that you truly own, calculated as the difference between your home’s market value and the amount you still owe on your mortgage. If your home has appreciated in value and you have paid down a significant portion of your mortgage, you may have substantial equity available.
This equity can often be used as the down payment for the new home, reducing or even eliminating the need to pay out of pocket. However, equity is only usable after your current home sells and the closing occurs, so timing and cash management are important.

The Impact of Mortgage Insurance

If your current mortgage is insured by CMHC,or Canada Guaranty, the mortgage insurance typically transfers when you port. However, if your new home requires a larger mortgage amount, additional insurance premiums may be charged on the increased portion.

It is also important to remember the minimum down payment rules in Canada, which still apply even during porting if your mortgage amount increases. For homes under $500,000, the minimum down payment is 5%. For homes between $500,000 and $999,999, the minimum increases. Homes priced at $1 million or more require a full 20% down and are not eligible for mortgage insurance.

Advantages and Disadvantages of Porting a Mortgage

Porting your mortgage has several benefits. It allows you to keep your current mortgage rate, which can be valuable in a rising-rate environment. It also helps avoid mortgage penalty fees and provides continuity, since you stay with the same lender and terms.

However, porting does have drawbacks. Not all mortgages are portable, and the process can be complicated when the new home is more expensive. You may also end up with a blended rate if you need additional financing. Additionally, your qualification is not guaranteed; lenders require a full reassessment even during porting.

Conclusion: Do You Need a Down Payment When Porting a Mortgage?

Whether you need a down payment when porting your mortgage depends largely on the cost of your new home and the equity you have built. If your new home costs the same or less, and you have adequate equity, you may not need a down payment at all. However, if the property is more expensive or your financial situation has changed, a down payment or additional financing will likely be required.

Porting can be a smart financial move for many homeowners—but it is important to evaluate the numbers carefully and consult a mortgage professional to understand your best options. Contact us for more information.