How Much Difference Will Extra Payments Make Towards My Mortgage?

James DeVuyst • October 3, 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 me anytime!

RECENT POSTS

Mortgage Approval 101: GDS & TDS Explained

By James De Vuyst • April 16, 2026
Can You Afford That Mortgage? Let’s Talk About Debt Service Ratios One of the biggest factors lenders look at when deciding whether you qualify for a mortgage is something called your debt service ratios. It’s a financial check-up to make sure you can handle the payments—not just for your new home, but for everything else you owe as well. If you’d rather skip the math and have someone walk through this with you, that’s what I’m here for. But if you like to understand how things work behind the scenes, keep reading. We’re going to break down what these ratios are, how to calculate them, and why they matter when it comes to getting approved. What Are Debt Service Ratios? Debt service ratios measure your ability to manage your financial obligations based on your income. There are two key ratios lenders care about: Gross Debt Service (GDS) This looks at the percentage of your income that would go toward housing expenses only. Total Debt Service (TDS) This includes your housing costs plus all other debt payments—car loans, credit cards, student loans, support payments, etc. How to Calculate GDS and TDS Let’s break down the formulas. GDS Formula: (P + I + T + H + Condo Fees*) ÷ Gross Monthly Income Where: P = Principal I = Interest T = Property Taxes H = Heat Condo fees are usually calculated at 50% of the total amount TDS Formula: (GDS + Monthly Debt Payments) ÷ Gross Monthly Income These ratios tell lenders if your budget is already stretched too thin—or if you’ve got room to safely take on a mortgage. How High Is Too High? Most lenders follow maximum thresholds, especially for insured (high-ratio) mortgages. As of now, those limits are typically: GDS: Max 39% TDS: Max 44% Go above those numbers and your application could be declined, regardless of how confident you feel about your ability to manage the payments. Real-World Example Let’s say you’re earning $90,000 a year, or $7,500 a month. You find a home you love, and the monthly housing costs (mortgage payment, property tax, heat) total $1,700/month. GDS = $1,700 ÷ $7,500 = 22.7% You’re well under the 39% cap—so far, so good. Now factor in your other monthly obligations: Car loan: $300 Child support: $500 Credit card/line of credit payments: $700 Total other debt = $1,500/month Now add that to the $1,700 in housing costs: TDS = $3,200 ÷ $7,500 = 42.7% Uh oh. Even though your GDS looks great, your TDS is just over the 42% limit. That could put your mortgage approval at risk—even if you’re paying similar or higher rent now. What Can You Do? In cases like this, small adjustments can make a big difference: Consolidate or restructure your debts to lower monthly payments Reallocate part of your down payment to reduce high-interest debt Add a co-applicant to increase qualifying income Wait and build savings or credit strength before applying This is where working with an experienced mortgage professional pays off. We can look at your entire financial picture and help you make strategic moves to qualify confidently. Don’t Leave It to Chance Everyone’s situation is different, and debt service ratios aren’t something you want to guess at. The earlier you start the conversation, the more time you’ll have to improve your numbers and boost your chances of approval. If you're wondering how much home you can afford—or want help analyzing your own GDS and TDS—let’s connect. I’d be happy to walk through your numbers and help you build a solid mortgage strategy.

Getting a Mortgage Shouldn’t Be Stressful—We Can Help

By James De Vuyst • April 9, 2026
Buying a Home? Follow These 6 Key Steps for a Smooth Experience Buying a home is likely one of the biggest financial decisions you’ll ever make. It’s exciting—but it can also be overwhelming, especially when it comes to understanding how mortgage financing works. To help make the process smoother (and far less stressful), here are six essential steps every homebuyer should follow: 1. Start With a Mortgage Professional—Not MLS It’s tempting to start your home search by scrolling through listings and booking showings—but the real first step should be speaking with an independent mortgage professional . Unlike a bank that offers only one set of products, an independent mortgage expert has access to multiple lenders and options . That means better advice, better rates, and a better chance of finding a mortgage that truly fits your needs. 2. Build a Personalized Mortgage Plan Unless you’re buying your home with cash, you’ll need a solid financing strategy. That means: Reviewing your credit score Running affordability calculations Exploring different mortgage types, terms, and features Understanding down payments and closing costs The sooner you start planning, the more confident you’ll feel. Don’t wait until you’ve found the “perfect” property— get ahead of the process now . 3. Figure Out What You Can Actually Afford What a lender says you can borrow doesn’t always match what you can comfortably pay each month. Take a close look at your budget, lifestyle, and spending habits. Think about how your mortgage payments, property taxes, utilities, and other costs will fit into your everyday cash flow. Avoid the stress of being house-poor by knowing your real-life affordability , not just your paper pre-approval. 4. Get Pre-Approved the Right Way A true mortgage pre-approval isn’t just entering numbers into an online calculator. It means: Completing a mortgage application Submitting all your required documentation Having a mortgage professional fully assess your file When you’re officially pre-approved, you’ll shop for homes with confidence , knowing what you qualify for and that you’re financially ready. 5. Submit Your Documents Promptly and Stay Flexible Once you find a property and your offer is accepted, time is of the essence. That’s when all the upfront work you’ve done really pays off. Be ready to: Provide additional documentation if requested Respond to your mortgage professional quickly Stay flexible and proactive throughout the approval process Your lender needs to verify everything before finalizing the loan, so staying organized is key. 6. Don’t Make Big Financial Changes Before Closing Once you’ve secured financing and waived your conditions, freeze your finances until after you get the keys. Seriously—don’t: Change jobs Apply for new credit Take out a loan Make a large withdrawal Even small changes can throw off your approval. Keep everything status quo until you officially take possession. Recap: 6 Steps to a Smooth Home Purchase Connect with an independent mortgage professional Create a mortgage plan early Know what you can afford (not just what you qualify for) Get fully pre-approved Stay on top of documentation Avoid major financial changes before possession Ready to Buy with Confidence? If you’re thinking about buying a home—or just want to know what’s possible—let’s talk. I’ll help you map out a personalized plan that makes your homebuying journey feel simple, strategic, and stress-free. Reach out anytime. I’d love to help you get started.

Smart Strategies to Save for Your Down Payment

By James De Vuyst • April 2, 2026
How to Start Saving for a Down Payment (Without Overhauling Your Life) Let’s face it—saving money isn’t always easy. Life is expensive, and setting aside extra cash takes discipline and a clear plan. Whether your goal is to buy your first home or make a move to something new, building up a down payment is one of the biggest financial hurdles. The good news? You don’t have to do it alone—and it might be simpler than you think. Step 1: Know Your Numbers Before you can start saving, you need to know where you stand. That means getting clear on two things: how much money you bring in and how much of it is going out. Figure out your monthly income. Use your net (after-tax) income, not your gross. If you’re self-employed or your income fluctuates, take an average over the last few months. Don’t forget to include occasional income like tax returns, bonuses, or government benefits. Track your spending. Go through your last 2–3 months of bank and credit card statements. List out your regular bills (rent, phone, groceries), then your extras (dining out, subscriptions, impulse buys). You might be surprised where your money’s going. This part isn’t always fun—but it’s empowering. You can’t change what you don’t see. Step 2: Create a Plan That Works for You Once you have the full picture, it’s time to make a plan. The basic formula for saving is simple: Spend less than you earn. Save the difference. But in real life, it’s more about small adjustments than major sacrifices. Cut what doesn’t matter. Cancel unused subscriptions or set a dining-out limit. Automate your savings. Set up a separate “down payment” account and auto-transfer money on payday—even if it’s just $50. Find ways to boost your income. Can you pick up a side job, sell unused stuff, or ask for a raise? Consistency matters more than big chunks. Start small and build momentum. Step 3: Think Bigger Than Just Saving A lot of people assume saving for a down payment is the first—and only—step toward buying a home. But there’s more to it. When you apply for a mortgage, lenders look at: Your income Your debt Your credit score Your down payment That means even while you’re saving, you can (and should) be doing things like: Building your credit score Paying down high-interest debt Gathering documents for pre-approval That’s where we come in. Step 4: Get Advice Early Saving up for a home doesn’t have to be a solo mission. In fact, talking to a mortgage professional early in the process can help you avoid missteps and reach your goal faster. We can: Help you calculate how much you actually need to save Offer tips to strengthen your application while you save Explore alternate down payment options (like gifts or programs for first-time buyers) Build a step-by-step plan to get you mortgage-ready Ready to get serious about buying a home? We’d love to help you build a plan that fits your life—and your goals. Reach out anytime for a no-pressure conversation.