Getting pre-approved for a mortgage is the most important step before house hunting. It tells you exactly how much you can borrow, locks in a rate, and signals to sellers that you are a qualified buyer. This guide covers the entire process from preparation to pre-approval letter.
Pre-qualification vs pre-approval
These terms are often confused but represent very different levels of commitment from a lender:
| Factor | Pre-Qualification | Pre-Approval |
|---|---|---|
| Credit check | No (soft check or none) | Yes (hard inquiry) |
| Documents required | None — self-reported info | Full income, employment, asset verification |
| Rate hold | No | Yes — typically 90–120 days |
| Time to complete | Minutes | 1–5 business days |
| Weight with sellers | Low | High — shows you can close |
| Cost | Free | Free |
| Binding on lender | No | Conditionally yes |
Pre-qualification is a rough estimate. Pre-approval is a conditional commitment. Always get pre-approved before making offers.
What lenders assess during pre-approval
Lenders evaluate five core areas. Understanding these in advance lets you strengthen weak spots before applying.
1. Income and employment
| Employment Type | What Lenders Need | Notes |
|---|---|---|
| Salaried (full-time) | Letter of employment, recent pay stubs, T4 | Simplest to verify |
| Hourly/part-time | 2 years of T4s, pay stubs, employer letter | Must show consistent income |
| Self-employed | 2 years of T1 Generals + NOAs, business financials | Lenders use net income or gross with add-backs |
| Commission-based | 2 years of T4s showing commission income | Lenders average the 2 years |
| Contract/gig income | 2 years of tax returns, contracts | Harder to qualify — consider a broker |
| Rental income | Lease agreements, T776 | Typically 50%–80% of rental income is counted |
Self-employed borrowers: Lenders will use your declared income on tax returns. If you aggressively minimize taxable income, your qualifying mortgage amount will be lower. Some lenders offer stated-income programs for self-employed applicants with 20%+ down.
2. Credit score
Your credit score determines both qualification and rate pricing:
| Score Range | Lender Tier | Rate Impact |
|---|---|---|
| 760+ | A-lender (best rates) | Qualifies for lowest available rates |
| 720–759 | A-lender | Qualifies for competitive rates |
| 680–719 | A-lender | May face slightly higher rates |
| 620–679 | B-lender | +0.5%–1.5% above best rates |
| 550–619 | B-lender / Private | +2%–5% above best rates |
| Below 550 | Private lender only | +5%+ or equity-based lending |
Before applying, check your score through Equifax or TransUnion and dispute any errors. Even 20 points can move you into a better tier.
3. Down payment
Your down payment must come from verifiable sources. Lenders will trace the origin of funds:
| Source | Accepted? | Documentation Required |
|---|---|---|
| Personal savings | Yes | 90 days of bank statements showing accumulation |
| RRSP (Home Buyers’ Plan) | Yes | HBP withdrawal confirmation |
| FHSA | Yes | FHSA withdrawal confirmation |
| Gift from immediate family | Yes | Signed gift letter confirming no repayment required |
| Sale of another property | Yes | Sale agreement, lawyer’s trust statement |
| Borrowed down payment | Limited | Some lenders accept with strong overall application |
| Cash with no paper trail | No | Lenders require documented source of funds |
4. Debt service ratios
Every pre-approval runs your GDS and TDS ratios:
| Ratio | What It Measures | Maximum |
|---|---|---|
| GDS (Gross Debt Service) | Housing costs ÷ gross income | 39% (CMHC insured) |
| TDS (Total Debt Service) | (Housing + all debt) ÷ gross income | 44% (CMHC insured) |
All calculations use the stress test qualifying rate — the higher of your contract rate + 2% or 5.25%.
5. The property (at final approval)
Pre-approval is based on your finances; final approval also depends on the property:
- Appraisal confirms the property value supports the mortgage
- Property condition does not pose risk to the lender
- Condo status certificate is satisfactory (for condo purchases)
- Environmental or legal issues are clear
Documents needed for pre-approval
Prepare these before applying to avoid delays:
| Category | Documents |
|---|---|
| Identification | Government-issued photo ID (2 pieces) |
| Income | Most recent pay stubs (30 days), T4s (2 years), Letter of employment |
| Self-employed | T1 General tax returns (2 years), Notices of Assessment (2 years), Business financial statements |
| Assets | Bank statements (90 days), RRSP/TFSA/FHSA statements, Investment account statements |
| Down payment | Proof of savings, gift letter (if applicable), HBP/FHSA withdrawal confirmation |
| Debts | Credit card statements, car loan statements, student loan balance, line of credit statements |
| Property (if known) | MLS listing, purchase agreement |
How to get pre-approved — step by step
Step 1: Check your financial readiness
Before approaching a lender, run these self-assessments:
- Use the mortgage affordability calculator to estimate your budget
- Check your debt service ratios
- Run the mortgage stress test to confirm you qualify
- Verify your down payment is sufficient
Step 2: Choose a lender or broker
| Option | Pros | Cons |
|---|---|---|
| Big 5 bank | Existing relationship, branch access | Limited to their own products |
| Credit union | May have more flexible criteria | Smaller product selection |
| Mortgage broker | Access to 30+ lenders, rate comparison | Quality varies by broker |
| Online lender | Often lowest rates, fast process | No in-person support |
A mortgage broker can be particularly valuable for first-time buyers, self-employed borrowers, or anyone with a non-standard income situation.
Step 3: Submit your application
The lender will:
- Pull your credit report (hard inquiry)
- Verify your income and employment
- Review your assets and down payment sources
- Calculate your GDS and TDS ratios at the stress test rate
- Determine your maximum mortgage amount
Step 4: Receive your pre-approval letter
A pre-approval letter typically includes:
- Maximum mortgage amount you are approved for
- Interest rate held for 90–120 days
- Term the rate applies to (usually 5-year fixed)
- Conditions that must be met for final approval
- Expiry date of the pre-approval
Pre-approval rate holds — how they work
One of the most valuable features of pre-approval is the rate hold:
| Feature | Details |
|---|---|
| Duration | 90–120 days (varies by lender) |
| What it does | Guarantees you this rate even if rates rise during the hold period |
| If rates drop | You get the lower rate — rate holds protect you both ways |
| Renewability | Some lenders allow one renewal of the hold period |
| Cost | Free — no obligation to proceed |
In a rising rate environment, a rate hold can save you thousands. On a $500,000 mortgage, a 0.25% rate increase adds approximately $7,200 in interest over a 5-year term.
Common pre-approval mistakes to avoid
- Changing jobs during the process — Lenders may re-verify employment before final approval
- Making large purchases on credit — A new car loan changes your TDS ratio and could disqualify you
- Opening new credit accounts — Hard inquiries and new debt can lower your score
- Moving money between accounts — Large unexplained transfers trigger anti-money-laundering questions
- Co-signing for someone else — Their debt becomes your debt for ratio calculations
- Assuming pre-approval equals final approval — It is conditional until the property is appraised and all conditions are met
How pre-approval affects your credit score
A full pre-approval requires a hard credit inquiry, which can temporarily lower your score by 5–10 points. However:
- Rate shopping is protected — Multiple mortgage inquiries within a 14–45 day window (depending on the credit bureau) count as a single inquiry
- The impact is temporary — Hard inquiries affect your score for 12 months and fall off your report after 3 years (Equifax) or 6 years (TransUnion)
- The benefit outweighs the cost — A 5-point dip is negligible compared to the advantage of knowing your budget and locking in a rate
Related tools and guides
- Mortgage Affordability Calculator — How much home can you afford
- Mortgage Qualification Calculator — What mortgage amount you qualify for
- Mortgage Stress Test Calculator — Test your qualification at the stress test rate
- Debt Service Ratio Calculator — Calculate your GDS and TDS
- First-Time Home Buyer Guide — Complete guide with all programs and incentives
- Home Buyers’ Plan — Using your RRSP for a down payment
- Mortgage Broker vs Bank — Which option is right for you
- Mortgage Rates — Compare current rates across lenders