All-in-One & Readvanceable Mortgages in Canada: Manulife One, National Bank All-In-One and the Smith Manoeuvre

Instead of a mortgage on one side and a chequing account on the other, you have one account with a negative balance. Say you owe $400,000 and your pay of $6,000 lands in the account. Your balance is $394,000 that day, and interest is calculated on $394,000 — not on $400,000. As you spend through the month the balance climbs back up, but every day the money sat there, it was working against your mortgage instead of earning nothing in a chequing account.

Interest is calculated daily and charged monthly. There is no required principal payment: the minimum obligation is the interest, which is simply added to the balance if you do not cover it. That is the flexibility, and that is the trap.

These two terms get used interchangeably and should not be.

A readvanceable mortgage is a mortgage plus a home equity line of credit registered together, where the HELOC limit grows automatically as you pay down the mortgage principal. Pay $1,000 of principal, gain $1,000 of HELOC room. You still make a regular amortized mortgage payment. Scotia STEP, TD's HELOC-with-mortgage, and most bank bundles are this.

A true all-in-one replaces the amortized mortgage with a single revolving account that your income and spending flow through. Manulife One is the clearest Canadian example.

The readvanceable version keeps repayment discipline built in. The all-in-one hands the discipline to you.

All-in-one and readvanceable products almost always price above a plain vanilla mortgage. Expect the main borrowing rate to sit somewhere around prime, versus a discounted variable or a competitive fixed rate on a standard mortgage. Many products also carry a monthly account fee.

On a $500,000 balance, a rate that is 0.75% higher costs roughly $3,750 a year. To come out ahead you need the daily-interest savings from your idle cash to exceed that gap. A household that averages $30,000 sitting in the account across the month saves about $1,650 a year at a 5.5% rate — real money, but less than the rate premium in that example. A household averaging $90,000 in float, or a business owner holding HST and payroll reserves between remittances, flips the arithmetic decisively the other way.

This is the whole analysis. Average idle cash times the rate, compared against the rate premium plus fees. Everything else is secondary.

## Who Should Avoid Them

With a conventional mortgage, the amortization schedule is a commitment device. The payment comes out whether or not you feel like paying it, and the balance goes to zero on a known date.

An all-in-one has no such date. Cover only the interest and the balance never moves. Cover less than the interest and the balance grows. Plenty of Canadians have held an all-in-one for a decade and owe close to what they started with — not through recklessness, but because nothing in the product ever required otherwise.

If you use one of these products, set your own amortization: decide the balance you intend to be at in twelve months, write it down, and check quarterly. Most all-in-one lenders will let you carve a portion of the balance into a fixed, amortizing sub-account precisely for this reason. Doing so on the bulk of the debt, and leaving only a working slice revolving, captures most of the benefit while restoring the discipline.

Manulife One and similar products let you split the balance into segments — for example, $350,000 locked into a fixed-rate amortizing sub-account and $50,000 left revolving as your day-to-day banking. The fixed portion behaves like a normal mortgage with a scheduled payment; the revolving portion captures the daily-interest benefit on your cash flow.

This hybrid is how most well-run all-in-one accounts are actually structured, and it addresses both the rate premium and the discipline problem at once.

A readvanceable mortgage is the mechanical prerequisite for the Smith Manoeuvre: as each mortgage payment pays down principal, the freed HELOC room is drawn and invested in income-producing investments, making that portion of the interest tax-deductible while the non-deductible mortgage shrinks.

It is a leveraged investment strategy, not a mortgage trick. It amplifies losses as readily as gains, requires meticulous separation of deductible and non-deductible borrowing, and the deductibility depends on how CRA views the use of funds — not on how the account is labelled. Anyone considering it should be working with both a mortgage professional and an accountant before the structure is set up, because retrofitting clean tracking onto a commingled account afterwards is close to impossible.

All-in-one and readvanceable mortgages are registered as collateral charges, typically for more than the amount you borrow. Two practical effects follow.

First, switching lenders at renewal is more involved: a collateral charge generally cannot be simply transferred, so a move usually requires discharge and new registration, with legal costs attached. Second, the registration can complicate adding a second mortgage or another secured lender later.

Neither is a reason to avoid the product, but both are reasons to be confident you want to stay with that lender for the long run. See [collateral vs. standard charge mortgages](/blog/collateral-vs-standard-charge-mortgages) for the full comparison.

Qualification follows normal Canadian rules. The combined mortgage and HELOC portion is capped at 80% of the appraised value of the home, with any revolving HELOC component limited to 65% of value. Applications are stress-tested at the greater of the benchmark qualifying rate or your contract rate plus two percentage points, and because these products price near prime, the stress-tested rate is higher than on a discounted mortgage — which reduces the amount some applicants qualify for.

Lenders also look harder at cash-flow behaviour on these files than they do on a standard mortgage, since the product's risk depends on how the borrower manages an open balance.

Before signing up, do three calculations. Work out your true average daily balance across a typical month — not your peak, your average. Multiply it by the rate to find your annual saving. Then compare that against the rate premium on your full balance plus any monthly fees.

Our [mortgage payment calculator](/calculators/mortgage-payment) and [amortization calculator](/calculators/amortization) will show what a conventional mortgage at the lower rate costs over the same period, which is the benchmark an all-in-one has to beat.