Two Canadian interest rate curves are moving through entirely different weeks right now, and an advisor who explains one using the logic of the other will get the timing wrong for a client. Mortgage-linked yields are easing as oil retreats. The rate that governs family income-splitting loans has not moved in a year.
The Two Curves Have Split
The Government of Canada 5-year yield touched a mid-July high near 3.20% as oil's war premium pushed inflation expectations higher, and fixed mortgage pricing followed: the best advertised insured 5-year fixed rate reached 3.94% to 3.99% by the week of July 20. That curve has started easing this week. The 10-year yield fell to 3.57% Monday from a one-month high of 3.66% on July 23, tracking oil's third straight losing session. This curve moves on the war premium and will move again on Wednesday's Federal Reserve decision, which CME FedWatch currently prices at roughly a one-in-three chance of a hike.
The CRA's prescribed rate for income-splitting loans is anchored to something else entirely: the average yield on three-month Treasury bills, which track the Bank of Canada's overnight rate rather than long-bond inflation expectations. The three-month bill sat at 2.25% in mid-July, essentially unchanged through the entire period that sent mortgage pricing higher. The prescribed rate itself has held at 3% for four consecutive quarters, into Q3 2026, because the short end of the curve never priced the same war premium the long end did.
Six Canadian rates sit on the same table this morning, and the gap between the three anchored to the Bank of Canada and the three carrying an oil-driven premium is the whole story.
The three anchored rates track the Bank of Canada's held overnight rate directly. The three reactive rates carry an inflation-risk premium tied to this summer's oil-driven yield move, which is why they sit meaningfully higher. Source: Bank of Canada, CRA prescribed rate notice for Q3 2026, Trading Economics.
Two Different Conversations, Two Different Clocks
For a client weighing a mortgage renewal, timing is genuinely live right now. The window created by this week's yield easing could close as fast as it opened. Canadian long yields have tracked US Treasuries closely through this cycle, and a hawkish surprise from Chair Kevin Warsh on Wednesday would likely reverse several days of easing within a single session. Clients renewing into the 2026 to 2027 wall of pandemic-era fixed terms do not have the luxury of waiting for certainty.
For a client considering a prescribed-rate loan to split income with a spouse or family trust, there is no equivalent urgency coming from the rate itself. The Bank of Canada's own Q2 2026 Market Participant Survey, released July 27, found that senior economists and strategists now expect the overnight rate to stay at 2.25% for the remainder of the year. Because the prescribed rate tracks that anchor rather than the oil-driven long end, a client who waits two more weeks to set up a loan is very unlikely to face a materially different rate than one who acts today.
The Deadline That Actually Applies
The real time pressure on prescribed-rate loans is administrative, not market-driven. A loan established at any point before September 30, 2026 locks in the current 3% rate for the entire life of the loan, regardless of where the prescribed rate goes afterward. That makes the relevant account types spousal and family-member loans, and loans to a family trust that distributes income to lower-bracket beneficiaries. For CCPC owners using a related corporate structure instead, the applicable figure is the pertinent loan or indebtedness rate, set at 6.3% for Q3, up marginally from 6.2% in Q2, a separate mechanism from the family income-splitting rate and one that moves independently.
For any client with an existing prescribed-rate loan, the standing rule remains unchanged by any of this week's rate movement: interest for the calendar year must be paid in cash by January 30 of the following year, or the loan loses its exemption from the attribution rules for that year and every year after.