First-Time Home Buyer Guide: Why You Shouldn’t Shop for a Mortgage by Interest Rate Alone
Buying your first home is a major financial decision.
For most first-time home buyers, it is also their first experience choosing a mortgage. That creates an understandable temptation to compare mortgages using the easiest number available:
The interest rate.
One lender advertises 4.19%. Another offers 4.29%. The first mortgage must be better, right?
Not necessarily.
A mortgage is much more than an interest rate. It is a financial contract containing qualification requirements, prepayment privileges, penalties, portability provisions, refinancing restrictions and other terms that can affect you long after closing day.
There is also something even more important for a first-time buyer:
You need to qualify for the mortgage before the rate matters.
That is why I encourage first-time buyers to approach their mortgage in a different order:
Approval first. Mortgage structure second. Rate third.
The objective isn’t to ignore mortgage rates. Rates absolutely matter.
The objective is to compare the whole mortgage rather than base one of the biggest financial decisions of your life on a single number.
Quick Answer: Should First-Time Home Buyers Shop for the Lowest Mortgage Rate?
A first-time home buyer should look for a competitive mortgage rate, but the lowest advertised rate shouldn’t automatically determine which mortgage they choose.
Before comparing rates, determine what you qualify for and which mortgage products fit your financial circumstances. Then compare the interest rate together with the mortgage term, amortization, prepayment privileges, penalties, portability and other restrictions.
A very low mortgage rate isn’t particularly valuable if you don’t qualify for it or the mortgage contract doesn’t meet your needs.
Find the right mortgage first. Then compare rates.
Why First-Time Buyers Focus So Much on Interest Rates
Interest rates are easy to understand.
If Mortgage A is 4.19% and Mortgage B is 4.29%, Mortgage A appears cheaper.
That makes rate an extremely effective advertising tool.
What an advertisement usually can’t explain in one large number is everything behind that rate.
For example:
- Do you qualify?
- What income will the lender accept?
- What credit profile does the lender require?
- What happens if you sell before maturity?
- How is the mortgage penalty calculated?
- Can you make additional payments?
- Can you port the mortgage to another property?
- Can you refinance before maturity?
- Are there restrictions attached to the product?
Those questions aren’t as exciting as an advertised rate.
But they may eventually matter far more.
Mortgage Approval Comes Before Mortgage Rate
The first question shouldn’t be:
“What is your lowest mortgage rate?”
It should be:
“What mortgage can I qualify for?”
Mortgage lenders evaluate the complete application.
That can include:
- employment;
- income;
- credit history;
- existing liabilities;
- down payment;
- source of down payment;
- debt-service ratios;
- property type;
- property value; and
- overall borrower risk.
For insured mortgages, CMHC’s published guidelines generally permit maximum Gross Debt Service (GDS) and Total Debt Service (TDS) ratios of 39% and 44%, respectively, subject to the complete application and applicable underwriting requirements.
This is why an advertised rate doesn’t necessarily represent a mortgage available to every borrower.
You have to qualify for the product.
The Lowest Rate Is Useless If You Don’t Qualify for It
Imagine finding a lender advertising an exceptionally low five-year fixed mortgage rate.
You apply.
Unfortunately, the lender doesn’t accept your particular employment circumstances, income structure, credit profile or property.
That mortgage rate is now irrelevant.
Another lender might have a slightly different rate but underwriting guidelines that fit your application.
This is one of the most important distinctions between shopping for a mortgage and simply shopping for a mortgage rate.
The mortgage has to work first.
How Much Down Payment Does a First-Time Home Buyer Need?
You don’t necessarily need a 20% down payment to purchase your first home.
For an insured mortgage in Canada, the current minimum down payment is generally:
5% on the first $500,000 of the purchase price
plus
10% on the portion between $500,000 and $1.5 million.
Properties priced at $1.5 million or more generally require at least 20% down and are outside the traditional insured-mortgage limit.
For example, on a $600,000 purchase:
5% of $500,000 = $25,000
10% of the remaining $100,000 = $10,000
Minimum down payment = $35,000
When your down payment is less than 20%, mortgage default insurance will generally be required.
The insurance protects the mortgage lender against borrower default. It doesn’t provide mortgage life or disability coverage for the homeowner.
Don’t Forget About Closing Costs
Your down payment isn’t the only cash you may need.
First-time buyers should also budget for expenses that can include:
- legal fees;
- land transfer tax;
- title insurance;
- appraisal costs, when applicable;
- home inspection;
- property tax adjustments;
- moving expenses;
- home insurance; and
- immediate repairs or purchases.
There is also something I encourage first-time buyers to consider carefully:
Don’t automatically put every dollar you have into the down payment.
Owning a home comes with surprises.
A furnace can fail. A roof can leak. Appliances break.
The objective isn’t simply to have enough money to buy the house.
You also need enough financial flexibility to own it.
Understanding the Mortgage Stress Test
The mortgage interest rate you pay, and the interest rate used to qualify you can be different.
Under Canada’s mortgage stress-test framework, applicable borrowers are generally qualified using the greater of:
the contract mortgage rate plus 2%
or
5.25%.
For example, if your mortgage contract rate were 4.29%, you could potentially have to demonstrate that you can qualify at 6.29%.
This is another reason the lowest advertised rate doesn’t tell you how much mortgage you can obtain.
Mortgage qualification is based on more than your actual monthly payment.
Why Two Mortgage Lenders Can Look at the Same Buyer Differently
Mortgage lending isn’t completely standardized.
Different lenders can have different policies regarding:
- probationary employment;
- overtime;
- bonuses;
- commission income;
- self-employed income;
- rental income;
- credit history;
- debt repayment;
- property type; and
- documentation.
Consider someone who recently changed employers but remained in the same occupation.
One lender may be comfortable with the situation.
Another may want additional documentation or require the probationary period to be completed.
Neither lender is necessarily wrong.
They simply have different underwriting policies.
This is one reason mortgage selection should begin with the borrower rather than the advertised rate.
Credit Score Matters — But It Isn’t the Whole Application
First-time buyers frequently ask:
“What credit score do I need to get a mortgage?”
No single credit score guarantees mortgage approval.
CMHC’s published insured-mortgage guidelines generally require at least one borrower or guarantor to have a minimum credit score of 600.
However, lenders can have their own credit requirements, and the score itself is only part of the analysis.
A lender can also consider:
- payment history;
- outstanding balances;
- available revolving credit;
- recent credit inquiries;
- collections;
- bankruptcies or consumer proposals;
- length of credit history; and
- overall debt obligations.
Excellent credit helps.
But excellent credit by itself doesn’t guarantee mortgage approval.
The Lowest Mortgage Rate Can Come With Different Terms
A competitive rate is valuable.
But before choosing a mortgage, understand the contract attached to it.
Mortgage products can differ in areas such as:
- prepayment privileges;
- early-discharge provisions;
- refinancing;
- portability;
- penalty calculations; and
- restrictions on changing the mortgage before maturity.
This doesn’t mean low-rate mortgages are bad.
Many excellent mortgage products also have very competitive rates.
The point is that rate alone doesn’t tell you whether a mortgage is good or bad.
You need to understand what you’re buying.
Mortgage Penalties Can Matter More Than You Think
Most first-time buyers aren’t planning to break their mortgage.
But circumstances change.
You might:
- move for employment;
- need a larger home;
- relocate to another community;
- separate from a partner;
- receive an inheritance;
- refinance;
- sell the property; or
- change your financial strategy.
Breaking a closed mortgage before maturity can result in a prepayment penalty.
Depending on the mortgage and lender, fixed-rate mortgage penalties can potentially involve an interest-rate-differential calculation. Other mortgages may use different formulas.
This is why the penalty provisions deserve attention before you sign the mortgage — not when you’re trying to get out of it.
Prepayment Privileges Can Save You Money
Your first few years as a homeowner may also bring positive financial changes.
Your income might increase.
You may receive bonuses.
You might want to accelerate your mortgage repayment.
Different mortgages provide different prepayment privileges.
Depending on the lender and product, you may be able to:
- increase regular mortgage payments;
- make annual lump-sum payments; or
- use other prepayment options.
These features can potentially reduce your principal faster and lower your long-term interest cost.
Again, none of this is visible from the advertised interest rate.
What Is Mortgage Portability?
A portable mortgage may allow you, subject to the lender’s terms and approval, to transfer your existing mortgage to another property.
That might not seem important when buying your first home.
But think several years ahead.
Your first home may not be your forever home.
Your family could grow.
Your employment could change.
You might relocate.
You might simply decide you want something different.
Portability can potentially provide additional options if you sell before your mortgage term expires.
It is another mortgage feature worth understanding before signing.
Fixed or Variable: Which Is Better for a First-Time Buyer?
There is no universal answer.
A fixed-rate mortgage provides rate certainty during the mortgage term.
A variable-rate mortgage is affected by changes in the lender’s prime rate, although the way payments respond to those changes depends on the particular mortgage product.
The appropriate choice depends on factors including:
- household cash flow;
- tolerance for changing rates;
- financial reserves;
- future plans; and
- personal preference.
A first-time buyer stretching to make the monthly payment may value predictability differently than a borrower with significant surplus income.
The decision should be based on your circumstances — not on which product happens to have the lowest rate today.
25-Year vs. 30-Year Amortization
Eligible first-time home buyers can now access 30-year amortizations on insured mortgages under federal mortgage reforms introduced in December 2024.
A longer amortization can reduce the required monthly mortgage payment.
That can improve monthly cash flow and potentially help some buyers qualify.
But there is a trade-off.
Stretching repayment over a longer period generally means paying interest for longer and can increase total borrowing costs if the mortgage remains outstanding over that extended period.
So which is better?
Again, there isn’t one answer for everyone.
A 30-year amortization can provide valuable payment flexibility.
A shorter amortization can reduce the time required to repay the mortgage.
The correct choice depends on the borrower’s financial objectives.
First Home Savings Account — FHSA
The First Home Savings Account has become an important planning tool for eligible first-time buyers.
The FHSA combines characteristics of an RRSP and TFSA for qualifying first-home purchases.
Eligible contributions can generally be deducted from taxable income, while qualifying withdrawals to purchase a first home can be tax-free.
Current rules provide up to $8,000 of FHSA participation room annually, subject to the applicable rules, and a $40,000 lifetime contribution limit.
For someone planning to purchase a first home in the future, the FHSA should be considered well before the actual house hunt begins.
First-Time Home Buyers’ Plan
Eligible first-time buyers may also be able to use the federal Home Buyers’ Plan (HBP) to withdraw funds from an RRSP toward a qualifying home purchase.
The current HBP withdrawal limit is $60,000 per eligible individual.
For a couple where both buyers qualify, this can potentially make a significant amount of registered savings available toward the purchase.
The FHSA and HBP can also potentially be used together, subject to their respective eligibility rules.
This is why down-payment planning should start early.
Why Mortgage Pre-Approval Should Come Before House Shopping
First-time buyers sometimes approach the process backwards.
They start looking at houses.
They find one they love.
Then they try to arrange financing.
A better sequence is:
Financing first. House second.
Before seriously shopping, you should have a reasonable understanding of:
- your available down payment;
- your credit position;
- your qualifying income;
- your existing liabilities;
- your approximate mortgage qualification;
- your expected monthly housing costs; and
- the type of mortgage that may fit your situation.
This can help establish a realistic purchase range before emotion influences the decision.
A Pre-Approval Isn’t a Final Mortgage Approval
This distinction is important.
A mortgage pre-approval can provide valuable information about your potential purchasing range and financing options.
But it doesn’t guarantee that every property you subsequently offer on will be approved.
Final approval can depend on both:
the borrower
and
the property.
The lender may still need to verify your income, employment, down payment, credit and other documentation.
The property itself may also need to satisfy the lender’s requirements.
That is why financing conditions can still be important even when you have been pre-approved.
The Property Has to Qualify Too
First-time buyers understandably focus on whether they qualify.
But lenders also evaluate the property securing the mortgage.
Potential considerations can include:
- appraised value;
- property condition;
- location;
- zoning;
- marketability;
- well and septic systems;
- heating systems;
- acreage;
- unusual construction; and
- rental components.
A buyer can have excellent income, excellent credit and a substantial down payment and still encounter a financing issue with a particular property.
Mortgage approval is about the complete transaction.
How Much Mortgage Can I Afford?
This is different from asking:
“How much mortgage can I qualify for?”
A lender determines the maximum mortgage it is prepared to approve under its guidelines.
Your personal budget determines what you are comfortable paying.
Those aren’t necessarily the same number.
Homeownership costs can include:
- mortgage payments;
- property taxes;
- utilities;
- home insurance;
- maintenance;
- repairs;
- condominium fees, where applicable; and
- everyday living expenses.
You don’t receive a prize for borrowing the maximum amount a lender will approve.
Your mortgage should fit your life — not consume it.
What Should First-Time Home Buyers Compare?
Once you know what you qualify for, then you can properly compare mortgages.
Look at the complete package:
Interest rate — Is it competitive for this type of mortgage?
Term — How long are you committing to the mortgage?
Fixed or variable — Which structure fits your circumstances?
Amortization — What repayment period makes sense?
Prepayment privileges — Can you accelerate repayment?
Penalties — What could happen if you need to break the mortgage?
Portability — Can the mortgage potentially move with you?
Refinancing flexibility — What options exist if your circumstances change?
Lender — Does its underwriting fit your application?
Restrictions — Are there conditions attached to the mortgage that you should understand?
Now the interest rate has context.
And that makes it much more meaningful.
The Right Order: Approval First, Rate Second
If there is one concept, I want first-time buyers to remember, it is this:
Approval first. Rate second.
That doesn’t mean accepting an uncompetitive mortgage rate.
Quite the opposite.
Once I understand the borrower’s complete financial circumstances, I can determine which mortgage solutions may be appropriate and then compare the available rates and terms.
That is fundamentally different from finding the lowest advertised rate and trying to make the borrower fit the mortgage.
The mortgage should fit the borrower.
Why Work With a Mortgage Broker as a First-Time Buyer?
A bank can offer you the mortgage products available through that institution.
A mortgage broker may have access to multiple lenders, including banks, credit unions, monoline mortgage lenders, and alternative lending options, depending on the borrower’s circumstances.
That can be particularly useful because lenders don’t all underwrite mortgages exactly the same way.
The role of a mortgage broker should therefore extend beyond finding an interest rate.
It should include helping you understand:
- how much you may qualify for;
- how lenders view your application;
- your available mortgage options;
- the differences between mortgage products;
- potential restrictions;
- mortgage costs; and
- how the mortgage fits your financial objectives.
The lowest rate is easy to advertise.
Advice is understanding what sits behind it.
Frequently Asked Questions
Should I choose the mortgage with the lowest interest rate?
Not automatically. Look for a competitive rate, but compare the entire mortgage, including its qualification requirements, penalties, prepayment privileges, portability and restrictions.
Do first-time buyers need 20% down?
No. Eligible borrowers can purchase with less than 20% down using an insured mortgage, subject to mortgage insurance, lender and property requirements.
Can a first-time home buyer get a 30-year mortgage?
Eligible first-time buyers can access 30-year amortizations on insured mortgages under the current federal mortgage rules.
What credit score does a first-time buyer need?
No single score guarantees approval. CMHC’s published insured-mortgage guidelines generally require at least one borrower or guarantor to have a minimum credit score of 600, while individual lenders may have additional requirements.
Should I get pre-approved before looking at homes?
Yes. Establishing your approximate purchasing range and financing position before seriously house hunting can reduce the risk of making an offer on a property that exceeds your financing capacity.
Does pre-approval guarantee my mortgage?
No. Final mortgage approval normally requires approval of the complete borrower application and the specific property being purchased.
Is a mortgage broker better than going directly to a bank?
It depends on your circumstances. A bank primarily offers its own mortgage products, while a mortgage broker can potentially compare options from multiple lenders.
Final Thoughts: Your First Mortgage Is More Than a Rate
Buying your first home is exciting, but it is also a substantial financial commitment.
You should absolutely want a competitive mortgage rate.
You should also want a mortgage you qualify for, understand and can live with if your circumstances change.
That’s why I don’t believe first-time buyers should begin the mortgage process by asking:
“Who has the lowest rate?”
Start with better questions:
What can I comfortably afford?
What do I qualify for?
Which mortgage structure fits me?
What happens if my circumstances change?
Then compare rates.
Because the objective isn’t simply to find the lowest number advertised today.
It is to choose the right mortgage for your first home.
Ready to Discuss Your First Mortgage?
If you’re buying your first home in Peterborough, the Kawarthas or elsewhere in Ontario, getting the financing strategy right before you start shopping can make the process considerably easier.
For personalized mortgage advice, pre-qualification or help comparing mortgage options, visit MikeCara.ca.
Your Mortgage Advocate,
Mike Cara
Mortgage Broker
Certified Canadian Reverse Mortgage Consultant
Equifax® Certified Credit Professional
The Mortgage Learning Centre provides educational mortgage information to help Canadian homeowners and home buyers better understand their financing options. Mortgage qualification, rates, products and lender policies are subject to change and individual approval.
