September Inflation: 3.1% — 9 Days Until the Bank of Canada Decides
Statistics Canada released September inflation this morning: 3.1%, versus 3.0% in August. It is the last major data point before the Bank of Canada's October 28 rate decision — the one markets have priced as a live call, with roughly a one-in-three chance of a hike. Here's what the number means under every scenario.
How we check the numbers: every figure on this page is calculated from official CRA, Statistics Canada or Bank of Canada data and cross-checked with the free calculators on this site — run them yourself to verify.
The short version
The Bank targets 2% inflation inside a 1–3% control range. August's 3.0% sat at the very top of that range; excluding gasoline, underlying inflation was 2.4% and rising. Governor Macklem has said the risks of higher inflation have increased. September's print decides whether the hike camp gains momentum — or loses it.
What's driving the number
Shelter: the heavyweight
Shelter is the largest slice of the CPI basket, and it contains a cruel loop: mortgage interest cost rises when rates are high, which pushes measured inflation up, which argues for keeping rates high. Rent growth adds to the same component. Until shelter cools, headline CPI has a floor under it.
Energy and gasoline
Gasoline is the most volatile CPI component and the reason economists watch core measures — CPI-trim and CPI-median, the Bank's preferred gauges — more closely than the headline. A headline move driven purely by pump prices matters less for October 28 than a move in the core.
Groceries and services
Food prices and services inflation (restaurants, travel, personal care) show whether price pressure is broadening beyond shelter and energy. Persistent services inflation is what turns a one-month spike into a Bank problem.
Three readings, one decision
Hot — 3.2% or higher. The hike camp gets its ammunition. Expect market odds of an October 28 increase to jump and fixed mortgage rates to move within days — bond yields react to expectations, not to the Bank's actual announcement. Variable-rate borrowers should run their +0.25% math now (see below).
In line — 2.8% to 3.1%. The coin flip continues. The Bank will lean on the core measures: if CPI-trim and CPI-median hold near 3%, the October meeting stays live; if they ease, the hold camp — TD Economics among them — gains ground. Watch the Monetary Policy Report language more than the rate itself.
Cool — 2.7% or lower. Hike talk fades fast. Combined with soft September jobs data and contained 2.4% wage growth, a cool print would make October 28 a hold with little drama — and take pressure off fixed rates heading into renewal season.
The math if they hike
A 0.25% Bank hike moves big-bank prime from 4.45% to 4.70%, usually the next day. Computed at current rates:
Fixed-payment variable mortgages don't change your payment — instead your amortization stretches, and far enough means hitting the trigger rate. HELOCs have no cushion at all: the interest charge just rises.
What to do this week
- Renewing within 6 months? Get a rate hold today. 90–120 days, costs nothing, protects you if October 28 surprises.
- Run the +$14-per-$100k math on your balance. Our mortgage calculator does it with your actual amortization.
- Know your mortgage type. Adjustable-payment variable, fixed-payment variable, or fixed — each reacts differently to a hike.
- Check your HELOC margin. Prime plus your margin is your new rate the morning after any hike.
- Read the full preview: BoC Oct 28 decision — hold vs hike scenarios.
Frequently asked questions
When is the Bank of Canada's next rate decision?
October 28, 2026, released with the Bank's Monetary Policy Report. The policy rate is currently 2.25% and big-bank prime is 4.45%.
What is the Consumer Price Index (CPI)?
The CPI, published monthly by Statistics Canada, tracks the price of a fixed basket of goods and services. The Bank of Canada targets 2% inflation within a 1–3% control range.
What are CPI-trim and CPI-median?
The Bank of Canada's preferred core inflation measures. CPI-trim excludes the most extreme price moves; CPI-median tracks the middle of the price-change distribution. They filter out noise like gasoline swings.
Why does shelter keep Canadian inflation high?
Shelter is the largest CPI component. It includes mortgage interest cost — which rises when rates are high — and rent. This creates a loop where high rates themselves push measured inflation up.
Will a hot CPI report raise my mortgage rate?
Not directly. Variable rates and HELOCs move only if the Bank of Canada hikes its policy rate. But a hot CPI raises hike expectations, which pushes bond yields — and fixed mortgage rates — up before the Bank acts.
Sources
Run your own hike math
Plug in your balance and amortization in the mortgage calculator — then add 0.25% to the rate and compare the payment.
Educational content only — not financial advice. Figures are estimates; confirm your own situation with the CRA or a licensed financial advisor. See our Disclaimer.