Minimum Down Payment Calculator

What the Minimum Down Payment Calculator does

Canada does not use a flat down payment percentage — it uses a tiered structure that changes rate as the purchase price crosses two thresholds, and almost nobody understands the tiers until they see the actual math. This calculator computes the exact minimum required for any price, shows the tier-by-tier breakdown of how that number is built, and compares it against what you actually have.

It also answers the two questions that follow immediately after the minimum: how far off is my down payment from getting me to 20%, and what would 20% actually save me? Both are shown in dollars, not just percentages, because that is what actually drives a decision.

• The exact minimum down payment required, with the tier-by-tier math shown
• Your loan-to-value and any shortfall against the minimum
• The maximum purchase price your available down payment supports
• The exact amount needed to reach 20% down, and the premium that would save
• Whether a 30-year insured amortization is available to you

The key variables that move the answer — and how lenders treat them

The minimum is driven by price and property type above everything else, but the source of the funds and the province both change what happens after the minimum is calculated.

• Purchase price — the entire tier structure hinges on this. Crossing $500,000 shifts the rate on the next dollar from 5% to 10%, and crossing $1,500,000 removes default insurance entirely, requiring the full 20% regardless of any tier math below that price.
• Property type — a rental or investment property gets no tiered relief at all. Lenders require a flat 20% down on any property that will not be the buyer's primary residence, with no exceptions.
• Down payment source — savings and a documented gift from immediate family are treated as traditional sources. Borrowed funds are non-traditional and carry a premium surcharge on top of the standard insurance rate, because the lender is taking on additional leverage risk that a self-funded down payment does not carry.
• First-time buyer status — does not change the minimum down payment itself, but it is one of the two paths (alongside buying a new build) to a 30-year insured amortization instead of the standard 25-year cap, which materially changes the qualifying payment.
• Province — does not change the minimum down payment, but does determine whether provincial sales tax applies to the default insurance premium. That tax is payable in cash at closing and is a real, and often unexpected, addition to closing costs.

How this is actually calculated in Canada

For an owner-occupied purchase, the minimum down payment is built in slices: 5% applies to the first $500,000 of the price, and 10% applies to the portion of the price between $500,000 and $1,500,000. Above $1,500,000 the purchase is not eligible for default insurance at all, so the minimum jumps to a flat 20% on the entire price — there is no partial tier above the cap.

On an $850,000 purchase, for example, the minimum is 5% of the first $500,000 ($25,000) plus 10% of the remaining $350,000 ($35,000), for a total of $60,000 — not a flat 5% or 10% of the full price. Rental and investment properties skip the tiers entirely and require 20% down on the full price, with no lower option available at any price point.

The reverse calculation — the maximum price a given down payment supports — inverts the same tiers: a down payment of $25,000 or less supports a price of down ÷ 5%; a down payment between $25,000 and $175,000 supports $500,000 plus (down − $25,000) ÷ 10%; above that, price is down ÷ 20%. This inversion is what produces the "maximum price with your down payment" figure above, and it is also the constraint that caps every affordability calculation on this site.

• Owner-occupied, price ≤ $500,000: minimum = price × 5%
• Owner-occupied, $500,000 < price ≤ $1,500,000: minimum = $25,000 + (price − $500,000) × 10%
• Owner-occupied, price > $1,500,000: minimum = price × 20% (uninsurable)
• Rental / investment, any price: minimum = price × 20%
• Max price for a down payment: inverts the tiers above, piecewise

What you get, and how lenders use these numbers to qualify you

The down payment figure is the starting point for almost every other number in a mortgage file — it decides your mortgage amount, your loan-to-value, and whether an insurance premium gets added on top.

• Minimum down payment — the hard floor a lender will not go below, checked before any other underwriting begins.
• Loan-to-value — determines the insurance premium band if the mortgage is insured, and is one of the key inputs pricing is set from, since insured deals are frequently priced more favourably than uninsured ones.
• Shortfall — tells you exactly how much more cash you need, in dollars, which is more actionable during a home search than a percentage alone.
• Amount needed for 20% — the number that decides whether default insurance applies at all, which in turn decides whether a premium gets added to the mortgage and whether provincial sales tax on that premium becomes part of your closing costs.
• 30-year amortization eligibility — expands the qualifying payment calculation, meaning it directly affects the maximum mortgage a lender will approve, not just the size of the monthly payment.

Using your results well

If you are close to a shortfall, run the numbers again at a slightly lower price to see how much the tiered structure eases the minimum required — because the rate only applies to the portion of the price above each threshold, a small price reduction near $500,000 can lower the minimum by more than the price reduction itself.

What this calculator deliberately does not do is verify the source of your funds. Lenders require specific documentation for savings, gifts and borrowed funds — bank statements, a signed gift letter, or a loan agreement — and an undocumented down payment can delay or derail a closing even when the dollar amount is sufficient. That documentation step is worth starting early, well before you have an accepted offer.

• Check the tier breakdown to see exactly which slice of the price each rate applies to
• Model a slightly lower price near $500,000 or $1,500,000 to see the tier effect directly
• Start documenting your down payment source now — gift letters and bank statements take time
• Compare the premium saved at 20% against how long it would take to save the difference
• Confirm 30-year amortization eligibility with a lender before assuming it applies to your file

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