The Canada Revenue Agency published prescribed interest rates for Q3 2026 last week. The family loan rate holds at 3% for July 1 through September 30. For income-splitting clients and their advisors, the announcement extended a planning window that has been open since Q3 2025, but the announcement does not extend it indefinitely.
The rate for Q4 2026 will be set based on the average yield of 90-day Government of Canada T-bills from the first month of the preceding quarter: July 2026. That yield does not exist yet. What does exist is the Bank of Canada's June 10 rate decision, which arrives tomorrow morning, and the forward market pricing that surrounds it.
What Tomorrow's Decision Could Do to Q4
Markets assign roughly a 97% probability to a hold at 2.25% tomorrow. That is not the question. The question is the tone of the statement. At the April 29 decision, the BoC explicitly put both cuts and hikes on the table, which it had not done in this cycle before. Governor Macklem used the word "persistent" in relation to energy-driven inflation, and noted the Governing Council would not allow the Hormuz-driven supply shock to pass through to sustained price increases without a response.
April CPI came in at 2.8%, with energy prices up 19.2% year-over-year. The BoC's April Monetary Policy Report projected CPI peaking near 3% before declining. Tomorrow's statement will be read closely for whether that 3% peak has arrived or whether the BoC now sees it running higher and longer. The more hawkish the tone, the more upward pressure on short-term Government of Canada yields, which are the direct input to the Q4 prescribed rate calculation.
A Q4 prescribed rate of 4% is not a catastrophe for existing prescribed rate loan structures. Those loans are locked at the rate in effect when they were established. But a Q4 rate of 4% means any client who has not yet set up a prescribed rate loan loses access to 3% for any new structure. The planning opportunity narrows in real time with each quarter at an elevated rate.
The Mechanics That Advisors Need to Have Cold
A prescribed rate loan works by allowing a higher-income spouse or family trust to lend funds to a lower-income spouse or family member at the CRA prescribed rate. The income earned on the invested funds is taxed at the lower-income recipient's marginal rate rather than the lender's. The attribution rules that would normally push that income back to the lender are defeated as long as three conditions hold: the loan is documented in a formal written agreement, interest is charged at no less than the prescribed rate in effect at the time the loan is made, and the interest is actually paid by January 30 of the following year, every year without exception.
The January 30 deadline is the one advisors most often need to chase. The income-splitting benefit is substantial enough that clients set up the structure enthusiastically, then forget the annual interest payment requirement. A missed payment does not just cost one year of the benefit. It collapses the attribution exemption for the year of the missed payment and every subsequent year. The loan does not simply pause; it fails permanently from that point forward.
The CRA prescribed rate for income-splitting loans peaked at 6% in Q3 2023 through Q2 2024 before falling back to 3% in Q3 2025, where it has held for five consecutive quarters. The green band marks the current 3% window; Q4 2026 is not yet set and will be determined by July T-bill yields, which are sensitive to tomorrow's Bank of Canada statement tone.
The TFSA and RRSP Angle That Is Often Missed
Clients who are focused on the prescribed rate loan conversation sometimes miss a related planning question: asset location inside the income-splitting structure. The invested funds advanced through a prescribed rate loan should be held in non-registered accounts on the borrower's side, because the income from those investments is what gets taxed at the lower rate. If the same funds were inside a TFSA or RRSP, the income-splitting benefit still exists but the additional registered account tax shelter means the advisor may be double-stacking tax efficiency in one account while leaving taxable room elsewhere underutilized.
The sequencing question for high-net-worth clients this summer is: TFSA and RRSP room first, prescribed rate loan for the excess, and non-registered equity held on the lower-income spouse's side in the loan structure. That ordering maximizes after-tax returns across the family unit and creates the most flexibility at the eventual drawdown stage.
For CCPC clients, the calculus has an additional layer. Investment income inside a corporation is subject to the refundable dividend tax on hand (RDTOH) mechanism, and the prescribed rate loan can move passive investment income outside the corporation and into the hands of a lower-taxed family member. With the BoC signalling that a rate hike is more likely than a cut over the next two decisions, the window to establish these structures at 3% may be shorter than clients realize.