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Six Mistakes That Can Undermine a Client’s Mortgage Application

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Mortgage applications are often assumed to be mechanical: income, credit, down payment, and approval. In reality, many mortgage deals unravel not because clients lack affordability, but because minor, preventable issues surface too late in the process. For Financial Advisors, these mistakes often emerge during routine planning conversations, well before a client speaks with a lender. Identifying them early can protect financial strategies, timelines, reduce stress, and preserve deal certainty.

Below are six common pitfalls that can quietly derail a mortgage application, along with how financial advisors can help clients avoid them.

Mistake 1: Inconsistent Personal Information Across Documents

Name inconsistencies sound minor, but they matter. Variations in spelling, middle names, hyphenation, or married names across credit reports, bank accounts, and identification documents can delay verification.

While these issues are usually solvable, discovering them mid-application can cause weeks-long setbacks, enough to jeopardize financing conditions or closing dates.

Encourage clients to review credit reports and banking details early and correct inconsistencies before applying.

Mistake 2: Errors or Unresolved Issues on a Credit Report

Credit reports are not always accurate. Duplicate accounts, outdated balances, forgotten collections, or accounts that should have been closed can quietly drag down your client’s credit score.

Credit disputes take time to resolve. Equifax notes that investigations can take up to 30 days, and updates to paid debts may take longer. Once a mortgage application is active, the delay becomes a liability after 45 days, the shopping window during which the credit bureau reports only one hard inquiry.

A credit review should be part of pre-application mortgage planning discussions, not a response to a decline.

Mistake 3: Falling Behind on Income Tax Filings

Unfiled or outstanding income taxes are a hard stop for most mortgage lenders. Banks typically require notices of assessment for the past 2 years and confirmation that the borrower is in good standing with the CRA.

Even profitable clients can run into trouble if filings are late or balances are outstanding.

Tax compliance is not just a tax issue; it’s considered a mortgage qualification requirement. Unpaid federal taxes take precedence over mortgage payments, placing lenders in second position for clients with outstanding income taxes.

Mistake 4: Taking On New Debt During the Application Process

Mortgage approvals are based on debt service ratios. Any new obligation, such as a vehicle purchase or a significant financed expense, can materially change those ratios after underwriting.

Lenders typically look for:
• Gross Debt Service ratios between roughly 32% and 39%
• Total Debt Service ratios between roughly 40% and 44%

A new car payment or credit line advance can push a client outside acceptable thresholds and invalidate an approval. Additionally, a new credit facility registered on your client’s credit report may temporarily lower their credit score.

Clients should be advised to avoid major purchases until funding is confirmed, not just after approval.

Mistake 5: Complicated or Poorly Documented Down Payment Sources

Having the funds is not enough. Lenders require a clear, traceable paper trail. Down payments sourced from margin accounts, volatile investments, unseasoned transfers, or untraceable assets can raise red flags.

Funds typically must remain in a verifiable account for at least 90 days to comply with Canadian Anti-Money Laundering (AML) laws. Certain assets, including cryptocurrency, may be declined entirely depending on lender policy and compliance concerns.

Encouraging clients to save or move down payments gradually into a transparent bank or investment account reduces friction later.

Mistake 6: Buying a Condo With a Special Assessment

Special assessments signal elevated risk. High one-time costs can strain cash flow, affect debt ratios, and raise concerns about the building’s management and financial health.

From a lender’s perspective, a special assessment may indicate deeper structural issues or reserve fund deficiencies, which could affect insurability or resale value. Even strong borrowers can be declined if the property is deemed high-risk or blocked by a particular lender.

A strong collateral for your mortgage loan is just as crucial as a borrower with great credit and verifiable income; property-level risk matters as much as borrower strength.

Advisor Who Addresses Concerns Early Earns and Retains Client Trust

These costly mistakes and issues rarely surface in isolation. They tend to appear during RRSP season, annual reviews, or planning conversations when clients mention buying, refinancing, or renewing.

Affordability gaps do not cause most mortgage application issues. They are caused by timing, documentation, and overlooked details. Minor missteps can have outsized consequences when discovered too late. Mortgage success is rarely about rushing faster. It is about preparing earlier.

Financial advisors who flag these risks early help clients avoid last-minute surprises and position themselves as proactive partners rather than reactive problem-solvers. Reviewing credit, taxes, debt behaviour, and savings structure well before a mortgage application begins can materially improve outcomes and protect client confidence.

Partner with nesto mortgage experts to integrate personalized financing solutions into your client strategies. Together, we can make responsible borrowing a cornerstone of long-term wealth creation and foster client confidence.


Why Choose nesto

At nesto, our commission-free mortgage experts, certified in multiple provinces, provide exceptional advice and service that exceeds industry standards. Our mortgage experts are salaried employees who provide impartial guidance on mortgage options tailored to your needs and are evaluated based on client satisfaction and the quality of their advice. nesto aims to transform the mortgage industry by providing honest advice and competitive rates through a 100% digital, transparent, and seamless process.

nesto is on a mission to offer a positive, empowering and transparent property financing experience – simplified from start to finish.

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