CMHC Mortgage Insurance: The Application Process, Step by Step

If your down payment is under 20%, your mortgage needs default insurance — and CMHC is the name you'll hear most. Here's how the application actually works, who submits it (it isn't you), how to qualify, what it costs, and the rules that changed for 2025 and 2026.

By the HomesFound team · October 30, 2026 · 6 min read

The first thing to know: you don't apply to CMHC

Mortgage default insurance protects the lender, not you — it pays the lender if you default. Because the lender is the insured party, the lender is also the applicant. When your mortgage needs insurance, your bank or broker submits the application to the insurer through its online portal (CMHC's is called emili) as part of your mortgage approval. You never fill in a CMHC form yourself. What you control is everything the insurer will judge: your income, your credit, your debts and your down payment. The "application process" is really the process of your file being built, submitted, and underwritten — and knowing the steps tells you where deals stall and how to keep yours moving.

When a mortgage needs insurance

• Down payment under 20%. Any owner-occupied purchase with less than 20% down must be insured. At 20% or more, insurance is generally not required.
• Minimum down payment. 5% of the first $500,000 of the price, plus 10% of the portion above $500,000. On a $600,000 home that's $55,000 — not the $30,000 a flat 5% would suggest.
• The $1.5 million ceiling. Insured mortgages are available on homes priced up to $1.5 million. Above that, you need the full 20% down and an uninsurable (conventional) mortgage.
• The property. One to four units, in Canada, and you must live in it — insured mortgages are for owner-occupied homes, with some programs for small rental properties under different rules.

The application process, step by step

1. Pre-approval and affordability. Your lender or broker runs your numbers first — income, debts, credit, down payment — against both their own rules and the insurer's. This is where most problems should surface, while they're still fixable.
2. An accepted offer. Insurance is applied for on a specific property, so the formal application starts once you have a signed purchase agreement.
3. The lender submits your file. Your documents — income confirmation, a 90-day paper trail for your down payment, the property details — go to the insurer with the application. A complete file matters: missing documents are the most common cause of delay.
4. Underwriting. The insurer checks your file against its rules (next section) and the property against its value. On a clean, complete file the decision often comes back within a few business days. The answer is yes, yes with conditions, or no.
5. The premium is settled. If approved, the premium is normally added to your mortgage balance, so you don't pay it out of pocket — one exception below if you're buying in Ontario.
6. Closing. The insurer confirms coverage to the lender, the lender funds, and the policy stays in force for the life of the mortgage (it's portable to a new property in many cases, which your lender can confirm).

How to qualify

• Credit score. At least one borrower generally needs a score of 600 or higher; stronger scores get more flexibility on everything below.
• Debt ratios. Your housing costs should fall within a Gross Debt Service ratio of 39%, and all your debts within a Total Debt Service ratio of 44% — those are CMHC's ceilings, and some lenders set their own bar lower.
• The stress test. You must qualify at the higher of your contract rate plus 2% or the Bank of Canada's benchmark rate — not at the rate you'll actually pay.
• Income that documents well. Salaried income is straightforward. Self-employed, commission and contract income need more paper — typically two years of tax filings — and are assessed on the trend, not the best year.
• A traceable down payment. Insurers want to see where the money came from: savings history, a gift letter for gifted funds, or FHSA/RRSP statements if you're using first-home programs.
• Amortization. 25 years maximum for most insured mortgages — extended to 30 years for first-time buyers (any home) and for anyone buying a newly built home.

What it costs: the premium

The premium is a percentage of the mortgage amount, set by how small your down payment is. The standard CMHC rates:

• 15%–19.99% down (80.01%–85% loan-to-value): 2.80%
• 10%–14.99% down (85.01%–90% loan-to-value): 3.10%
• 5%–9.99% down (90.01%–95% loan-to-value): 4.00%
• 30-year amortization adds 0.20% to the applicable rate.

An example: a $600,000 home with 10% down means a $540,000 mortgage. At 3.10%, the premium is $16,740, added to the mortgage for a total of $556,740. One cash cost remains: Ontario charges 8% tax on the premium — $1,339.20 on this example — and unlike the premium itself, that tax cannot be added to the mortgage. Budget for it in your closing costs.

CMHC vs. Sagen vs. Canada Guaranty

CMHC is a Crown corporation, but it isn't the only insurer: Sagen and Canada Guaranty are private companies offering the same federally regulated insurance, with premiums and core rules that are very close across all three. You usually don't choose between them — your lender works with one or two insurers and submits to theirs. Where they differ is in the niches: how they treat self-employment income, New-to-Canada buyers, second homes and other less-standard files. If one insurer declines a file, a broker can sometimes place it with another whose guidelines fit it better.

The rules worth knowing now

• $1.5 million cap (December 2024). The insured price ceiling rose from $1 million to $1.5 million, opening insured mortgages — and 5%-down purchases — to a whole band of Ontario homes that previously needed 20% down.
• 30-year amortizations (2024). First-time buyers can amortize over 30 years on any insured purchase, and all buyers can on newly built homes — lowering the payment, at the cost of a slightly higher premium and more interest over time.
• The stress test still applies to every insured mortgage, at the qualifying rate described above — a 30-year amortization doesn't exempt you from it.

If the answer is no

A decline is about the file, not about you permanently. The usual fixes: a larger down payment (which can also drop you into a cheaper premium band), paying down debts to repair the ratios, a co-signer or guarantor, a different property, or a submission to a different insurer through a broker. If the decline was ratio-based, ask exactly which ratio failed and by how much — that turns a vague "no" into a specific, fixable number.

Next step

Insurance is decided on the strength of the file your lender submits — which is built at pre-approval, not after you've found the home. Start with what lenders actually check, then see what your numbers buy at HomesFound search.