How Much Difference Will Extra Payments Make Towards My Mortgage?

Matt Chan • May 14, 2019

Have you ever wondered how much difference extra payments actually make in paying down your mortgage? Let’s take a look and maybe do a little math.

The first (and largest) factor to look at is the amortization, which is the remainder of your mortgage’s life. A majority of mortgages today start with 25-year amortizations. If you have made only regular payments for 5 years on a 25-year mortgage, your remaining amortization will be 20 years. Pretty simple, right?

Someone making an extra payment on a mortgage with 20 years left will save WAY more interest than someone making the same payment on a mortgage with 5 years left. The more years remaining on a mortgage, the more impact your extra payment will make.

The second factor to keep in mind is the mortgage interest rate. Your interest rate will change many times over the life of your mortgage, divided up by mortgage terms. If you agree to a 5-year term, you will only have that interest rate for 5 years, and then it will be time to renew at a different interest rate. At the time of this writing, mortgage rates are exceptionally low (even after some recent increases in 2018), and based on the last rate decision from the Bank of Canada on April 24/2019, they do not appear to be increasing anytime in 2019.

So what does that mean for you? Well, it depends if you are renewing this year, or 3 years from now. If you are renewing this year, you may want to consider your investment options for a lump sum amount, as opposed to paying down your mortgage. Paying down your mortgage makes the most sense when your amortization is high, and interest rates are also high (or going higher). If you’re renewing in three years time, then you may still want to consider paying down your mortgage, especially if you think mortgage rates will be higher at your renewal. The more you can pay when your mortgage is below 4%, the better payoff it will be if rates increase above 5%.

This is all conjecture and guesswork, especially when deciding between paying down your mortgage or investing more. However, mortgage rates have been abnormally low for a while now, and for whatever reason, the government of Canada selected a benchmark rate above 5% to qualify for a mortgage. Where interest rates go is anyone’s best guess, but it’s nice to be ahead of the game on your mortgage than trying to play catch-up with higher interest rates.

So let’s talk dollar amounts. For all of my examples, I’m going to use a $250,000 mortgage at 3.49% with 20 years remaining – that works out to a payment of $1445.40. If you switch to an accelerated bi-weekly, you’ll pay $722.70 every two weeks (half of the monthly amount), but you’ll save over $12,000 over the next 20 years because you will be making a couple of extra payments per year. Those payments really add up.

With the same mortgage (back on the regular monthly payment), let’s say you have $10,000 floating around your accounts, and you decide to use that money to pay down your mortgage. You’ll have saved around $9,500 in interest thanks to that payment. If you did BOTH the accelerated bi-weekly schedule and the $10,000 payment, it combines to over $20,000 of saved interest.

One more calculation with this mortgage – let’s say that, instead of any of the options described here, you decide to increase the monthly payment from $1445.40 to $1600 even. In just the 5 years time, you would save almost $6000 in interest over the life of the entire mortgage. But if mortgage rates stayed the same for the entire life of the mortgage, and you kept up the additional payment of only $154.60/month, you would pay off the mortgage 3.5 years sooner, AND save almost $15,000 in interest.

In summary, paying down your mortgage can feel good, both in your mind and in your wallet. It makes the most sense to pay down your mortgage when both amortization and interest rates are high. It can sometimes be difficult choosing between investing more and paying down your mortgage, but you can think of your mortgage interest rate as a guaranteed return, which is typically better than your GIC options.

If you’d like to discuss your financial situation and and want to review your mortgage to make sure you have the best mortgage available, contact us anytime!

CONTACT

Share

RECENT POSTS

By Matthew Chan September 16, 2026
Porting Your Mortgage: What You Need to Know Before You Rely on It Porting a mortgage means transferring your existing interest rate, remaining term, and outstanding balance from your current home to a new one when you sell and buy again. While some lenders—especially big banks—make porting sound simple, the reality is that porting a mortgage is often complex and far from guaranteed . It’s not a magic solution, and it doesn’t mean you automatically get to keep your old mortgage on your new home. In many ways, porting a mortgage feels like applying for a brand-new one—often with more conditions . Here’s why. 1. You Still Have to Re-Qualify Even though you already have the mortgage, the lender will reassess you. If you: Changed jobs Moved to a new city Are on probation Switched industries or income types …the lender may decline the port. Your previous approval does not carry over automatically. 2. The New Property Must Be Approved The lender also reassesses the new property . Just because they accepted your previous home as collateral doesn’t mean they’ll approve the next one. Expect: A new appraisal A review of the property’s condition Scrutiny around marketability and value If the lender isn’t comfortable with the property, the port can fail. 3. Property Values Rarely Line Up Perfectly Most moves involve a price difference. Buying a more expensive home: You’ll likely need additional funds at a blended rate, which can increase your payment. Buying a less expensive home: You may face a penalty for reducing the mortgage balance. Either scenario can affect your costs. 4. You Still Need a Down Payment Porting doesn’t mean you “swap houses” without cash. You still need: A down payment on the new purchase Closing costs Funds available at the right time This often surprises buyers. 5. Penalties Usually Still Apply (At First) Most lenders: Charge the full mortgage penalty when you sell Refund it only after the port is successfully completed If you’re relying on sale proceeds for your down payment, this temporary penalty can create a cash-flow issue. 6. Timelines Rarely Line Up Perfectly Real estate markets don’t cooperate. You might: Sell quickly but struggle to buy Find a home quickly but wait months to sell Closing dates rarely align, which complicates porting even further. 7. Port Periods Vary by Lender This is where the fine print matters. Depending on the lender, the port window may be: Same day only 30 days 90 days Up to 6 months If the port window is short, both transactions must close within that timeframe—or the port fails. Longer port periods offer flexibility, but also carry the risk of selling first and not finding a replacement property in time. The Bottom Line Porting your mortgage can make sense—especially if you have a strong rate and are buying a similar-priced home. But it is not guaranteed , and it comes with conditions, risks, and timing challenges. Portability is a feature, not a promise. Before you rely on it, it’s important to review all your options , including whether staying with your lender actually makes financial sense. If you’re planning to sell and buy, I’d be happy to walk you through the process, explain your options clearly, and help you decide whether porting is the right move—or if another strategy makes more sense.
By Matthew Chan September 9, 2026
Why the Source of Your Down Payment Matters More Than You Think When buying a home, most people focus on how much they need for a down payment. What often gets overlooked is that where the down payment comes from matters just as much to the lender . The source of your down payment affects approval, risk assessment, and how your mortgage is structured. Here’s why lenders care—and what you need to know. 1. Anti–Money Laundering Requirements Lenders aren’t just being cautious—they’re legally required to verify the source of your down payment. To comply with anti–money laundering regulations, lenders must document where every dollar of the down payment came from on every purchase. Acceptable Down Payment Sources Down payments can come from: Your own savings or investments Borrowed funds through an insured program (such as FlexDown) A gift from an immediate family member How You Prove the Source Personal savings: You’ll need bank statements showing the funds have been in your account for at least 90 days , or proof they were accumulated through payroll deposits or other acceptable sources. Borrowed funds: Any borrowed portion must be included in your debt service ratios , since you’re responsible for repayment. Gifted funds: A signed gift letter is required confirming the money is a true gift with no repayment obligation , along with proof the funds were deposited into your account. 2. Financial Suitability and Risk The source of your down payment also tells the lender a lot about your financial habits. Down payments coming from your own savings demonstrate: Positive cash flow The ability to save consistently Strong financial management This reassures lenders that you’re more likely to keep up with mortgage payments. If the down payment is borrowed or gifted, lenders may look more closely at the rest of your application to ensure the mortgage remains affordable. Why a Larger Down Payment Helps From a lender’s perspective, more equity equals lower risk. The more money you have invested in the property, the less likely you are to walk away from the mortgage. This reduces the lender’s exposure and can sometimes result in better terms. 3. Down Payment and Loan-to-Value (LTV) Your down payment directly establishes your loan-to-value ratio (LTV)—the percentage of the property’s value being financed. In Canada: Lenders can finance up to 95% of a property’s value The buyer must contribute at least 5% as a down payment Example: On a $400,000 purchase: Maximum mortgage = $380,000 Minimum down payment = $20,000 How the Source Affects LTV Property value must be genuine and independently supported. Lenders rely on appraisals and comparable sales—not artificial price inflation. If: The seller provides money back The buyer doesn’t bring the full down payment independently Funds move “behind the scenes” …the lender considers this a change to the LTV and may decline the mortgage. All financial details of the purchase must be fully disclosed. Non-disclosure is mortgage fraud , and lenders will not proceed if the numbers don’t align. Final Thoughts Lenders ask for detailed documentation about your down payment source for good reason—it affects legality, risk, and the structure of your mortgage. Understanding these rules upfront helps avoid delays, declined applications, and last-minute surprises. If you’d like to review your down payment options or talk through mortgage financing, feel free to connect anytime. I’d be happy to walk you through the process and help you plan with confidence.
By Matthew Chan September 2, 2026
The Bank of Canada announced today that it is holding its target for the overnight rate at 2.25%, with the Bank Rate at 2.5% and the deposit rate at 2.20%. While Canada's economic recovery is broadening, a new layer of uncertainty has entered the picture. Here is what happened and what it means for your mortgage.