A HELOC is not priced like a mortgage. It is Prime plus a margin, it moves the day Prime moves, and the minimum payment is interest only — so the headline is a spread, not a rate, and most pages stop there. Here is the actual number. At Prime (4.45%) plus the 0.50% margin we typically negotiate, a HELOC prices at 4.95%; a weaker file or a smaller lender lands nearer Prime + 1.00%, or 5.45%.
On a Hamilton home at the $738,025 average (City of Hamilton average sale price, Cornerstone Association of REALTORS (ITSO)) with a first mortgage around 50% of value, a stand-alone line reaches $110,703. What that costs, interest only, at 4.95%:
Interest-only cost of a HELOC draw at 4.95%
| Amount drawn | Monthly minimum | Cost per year |
| $25,000 | $103 | $1,238 |
| $50,000 | $206 | $2,475 |
| $100,000 | $413 | $4,950 |
| $110,703 — the full line | $457 | $5,480 |
Two things that table is quietly telling you. First, none of those payments repay a cent of principal — draw $100,000 and pay the minimum forever and you still owe $100,000. Second, the cost environment has changed under this product. When Prime sat at 2.45% through 2021, the same Prime + 0.50% line cost 2.95% and the decision made itself. At 4.95% it is a real cost that has to be justified by what the money does. The product didn't change; the environment did.
Model your own draw with the HELOC payment calculator.