Mortgage strategies
Six ways to use a mortgage as a financial instrument instead of a monthly bill. Not all of them will suit you. Two of them probably will.
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Direct answer
The main mortgage strategies available to Ontario homeowners are: all-in-one and readvanceable mortgages such as Manulife One; rental cash damming to convert non-deductible interest into deductible interest; reverse mortgages for equity release at 55 and over; stacking the FHSA with the RRSP Home Buyers' Plan to build a down payment with pre-tax dollars; debt consolidation refinancing; and renewal restructuring.
A first-time buyer who maxes both registered accounts can assemble $100,000 toward a down payment, or $200,000 as a couple, with tax deductions on the way in. Which strategy fits depends on what you own and where the money is leaking.
On this page
How to choose
Every strategy on this page does one of three things. It lowers the cost of money you have already borrowed. It changes the tax treatment of interest you are already paying. Or it gets more of your own pre-tax money working before it ever becomes a mortgage.
That framing matters, because most people go shopping for a product when what they actually need is a diagnosis. The right question is not "should I get a Manulife One." It is "where is the money leaking, and which of these closes that particular hole."
1. All-in-one and readvanceable mortgages (Manulife One)
What it does: collapses your mortgage, chequing, savings and line of credit into one account. Every dollar sitting in the account reduces the balance interest is charged on that day, while staying completely accessible.
Why it works: most households float a meaningful amount of cash between paycheques. On a $400,000 balance with a $20,000 average float at 5.45%, that idle money quietly saves about $1,090 a year instead of earning nothing in a chequing account.
Who it suits: the self-employed, whose income arrives in lumps and who park HST and tax instalments for months. Households running a genuine monthly surplus. Anyone with irregular large expenses who needs real liquidity.
Who should stay away: anyone whose available credit tends to become spent credit. There is no forced amortization on an all-in-one, so nothing makes you pay principal. I turn people away from this product more often than I recommend it.
Full breakdown, including the readvanceable alternative →
2. Rental cash damming
What it does: converts non-deductible personal mortgage interest into tax-deductible interest, using a rental property as the mechanism.
How: you pay every rental expense from a line of credit, and direct 100% of rental income at your personal mortgage as a principal prepayment. The borrowing is for the purpose of earning rental income, so that interest is deductible under paragraph 20(1)(c) of the Income Tax Act. Over time, non-deductible debt shrinks and deductible debt grows. Total debt stays roughly flat. Your tax bill does not.
What it is worth: a rental generating $14,000 a year of deductible expenses, for an owner in a 43% marginal bracket, converts to roughly $6,000 a year in tax. The larger effect is usually the years knocked off the personal mortgage by redirecting rental income at principal.
The catch: it requires a readvanceable mortgage with genuinely separate sub-accounts, built before you start. One mixed transaction can contaminate the tracing on an entire balance, and CRA can review historical years. This one needs an accountant, not just a mortgage agent.
The full mechanics, step by step →
3. Reverse mortgages and equity release at 55+
What it does: lets a homeowner aged 55 or older borrow against home equity, generally 15% to 55% of appraised value, with no required monthly payments. Interest accrues and is repaid when the home is sold or the last borrower moves out.
Who it suits: the equity-rich and income-poor who intend to stay in the home; retirees clearing high-interest debt on a fixed pension income; anyone avoiding a forced sale of investments in a down market or managing the timing of RRIF withdrawals.
The honest caveat: compounding with no payments runs in both directions. The balance roughly doubles every decade at current rates. And if you can qualify for a HELOC or a conventional refinance on pension, CPP, OAS or RRIF income, that money is cheaper. Plenty of retirees who assume they cannot qualify actually can, and checking costs nothing.
Costs, protections and four alternatives →
4. Building a down payment with pre-tax money: FHSA plus the Home Buyers' Plan
This is the strategy first-time buyers most often get wrong, and it is worth real money. Most people save for a house in a regular savings account, using money they have already paid tax on. There are two registered accounts that let you do it with pre-tax dollars instead, and you can use both for the same purchase.
The First Home Savings Account
$8,000 a year, $40,000 lifetime. Contributions are tax-deductible like an RRSP, and qualifying withdrawals for a first home are tax-free like a TFSA. No other registered account in Canada does both, and nothing ever has to be repaid.
Two rules that decide how much this is worth to you:
- Room starts when you open the account, not when you turn 18. This is the most expensive detail on this page. Open an FHSA today, even with nothing in it, and you begin banking $8,000 of room a year. Wait until the year you buy and you get $8,000, full stop.
- Carry-forward is capped at one year. Unused room carries forward, but only up to $8,000, so the most you can put in during a single calendar year is $16,000. It does not stack indefinitely.
There is no $2,000 cushion the way there is with an RRSP. Excess contributions are taxed at 1% per month, so confirm your room before making a lump-sum transfer.
The RRSP Home Buyers' Plan
A first-time buyer can withdraw up to $60,000 from an RRSP tax-free toward a qualifying home, or $120,000 for a qualifying couple. The deduction happened when you contributed. The withdrawal is tax-free, but it is a loan from your future self: repayment runs over 15 years, and any annual repayment you miss is added to your taxable income for that year.
The 90-day rule matters. Money must sit in the RRSP for at least 90 days before it can be withdrawn under the plan. If you are considering a fresh RRSP contribution to generate a refund before buying, that timing needs to be planned months out, not weeks.
Stacking both, and what it is actually worth
| Account | Per buyer | Couple | Tax treatment | Repayment |
|---|---|---|---|---|
| FHSA | $40,000 | $80,000 | Deductible in, tax-free out | None, ever |
| RRSP Home Buyers' Plan | $60,000 | $120,000 | Deducted when contributed, tax-free out | 15 years |
| Available for a down payment | $100,000 | $200,000 | ||
| Tax refunded on $40,000 of FHSA contributions at 43% | ~$17,200 | ~$34,400 | Refunds received while saving, not at closing | |
Illustrative. Your marginal rate, contribution room and eligibility determine the actual figures.
Read that bottom row again. A couple who fund their FHSAs fully get roughly $34,400 back from CRA during the years they are saving. That is not a rebate at closing and it is not a credit against the purchase. It is cash, in your hand, every spring, which can go straight back into the accounts.
The tactical version, in order: open the FHSA now regardless of whether you can fund it. Fill the FHSA before the RRSP, because of the double benefit and because it never has to be repaid. Use the Home Buyers' Plan for the balance. Plan the 90 days. And decide how you will make the HBP repayments before you commit, because that obligation follows you for fifteen years.
Down payment minimums, land transfer tax rebates and what closing costs in London →
5. Debt consolidation refinancing
What it does: replaces expensive money with cheap money. $100,000 of consumer debt at a blended 14% costs roughly $14,100 a year in interest. The same balance inside a mortgage at 4.5% costs about $4,500.
The step almost everyone skips: keep paying the old total. If your minimums were $2,400 a month and the new mortgage payment adds $560, do not pocket the difference. Redirect it at the mortgage as a prepayment. Same money leaving the household, debt gone in a third of the time.
The rules, the real costs, and when it is a bad idea →
6. Renewal restructuring
What it does: uses the one moment when there is no prepayment penalty to fix everything at once. Rate, term, amortization, prepayment privileges, lender, and whether other debt should be folded in.
Since November 2024, federally regulated lenders no longer apply the stress test to a straight switch at renewal, where the balance and amortization are unchanged. Shopping a renewal is easier than it has been in years, and most lenders cover the legal and appraisal costs of the switch.
Start at 120 days. That is long enough to get competing offers and use one as leverage.
Which one fits you
| If this is you | Start here |
|---|---|
| Good income, own a home, still squeezed every month | Debt consolidation |
| Own a rental property and a personal mortgage | Cash damming |
| Self-employed, lumpy income, cash parked for taxes | All-in-one or readvanceable |
| Saving for a first home | FHSA plus Home Buyers' Plan |
| 55 or older, equity-rich, income-poor | Equity release |
| Renewal inside the next year | Renewal restructuring |
| Not sure which applies | A 30-minute call |
Most households I meet qualify for two or three of these. The sequence usually matters more than the choice, because some structures are cheap to build at renewal and expensive to retrofit later.
New to working with a mortgage agent? Here is how lender access, compensation and the process actually work in Ontario.
Written and reviewed by Derrick Johnston, Mortgage Agent Level 2, BRX Mortgage Inc. (FSRA #13463). General information only. Not tax, legal or investment advice. FHSA and Home Buyers' Plan rules are set by CRA and change; confirm current limits and your own eligibility before acting. Cash damming requires review by a licensed accountant.
Straight answers
Frequently asked questions
Can I use the FHSA and the RRSP Home Buyers' Plan for the same house?
Yes. CRA allows a qualifying FHSA withdrawal and a Home Buyers' Plan withdrawal for the same qualifying home, provided you meet the conditions at the time of each withdrawal. That is up to $40,000 from the FHSA plus $60,000 from the RRSP, so $100,000 per buyer and $200,000 for a qualifying couple.
Why is the FHSA better than an RRSP for a down payment?
Because it is the only registered account in Canada that gives you a deduction going in and a tax-free withdrawal coming out. An RRSP gives you the deduction but the Home Buyers' Plan withdrawal has to be repaid over 15 years. A TFSA gives you the tax-free withdrawal but no deduction. The FHSA does both, and nothing has to be repaid.
What happens to my FHSA if I never buy a home?
You can transfer the full balance, including growth, into your RRSP or RRIF tax-free, and it does not use up RRSP contribution room. That is why there is effectively no downside to opening one early. The worst case is that it quietly becomes extra retirement savings.
Should I open an FHSA even if I cannot contribute yet?
Yes, and this is the single most common miss. FHSA contribution room only begins to accumulate in the calendar year you open the account. Someone who opened an account in 2023 and contributed nothing has been banking room the whole time. Someone who waits until the year they buy gets $8,000 of room and nothing else.
What is the difference between cash damming and an all-in-one mortgage?
They solve different problems. An all-in-one mortgage reduces the balance interest is charged on by parking your cash against the mortgage daily. Cash damming changes the tax character of your interest by borrowing to pay rental expenses while rental income pays down non-deductible personal debt. Cash damming needs a readvanceable mortgage with separate sub-accounts, not a single all-in-one account, because CRA requires clean tracing.
Which mortgage strategy is right for me?
It depends on what you own and what is leaking. High-interest consumer debt points to consolidation. A rental property plus a personal mortgage points to cash damming. Large cash float and strong discipline points to an all-in-one. Age 55 or over, equity-rich and income-poor points to equity release. Saving for a first home points to stacking the FHSA and the Home Buyers' Plan. Most households qualify for more than one.
Do these strategies require a specific lender?
Some do. Readvanceable mortgages with true sub-accounts are offered by a limited set of lenders, and all-in-one accounts by fewer still. Reverse mortgages in Canada come from HomeEquity Bank and Equitable Bank. Choosing the strategy first and the lender second is the right order, and it is the main reason these decisions are hard to unwind later.
Next step
A 30-minute call tells you whether there's money on the table.
No application, no credit pull, no pitch. Bring your current mortgage balance, your renewal date, and a rough list of what you owe elsewhere. You'll leave the call knowing your options and what each one costs.