Refinancing to Fund Home Renovations in Canada — Your Options Compared
Four main options exist, each with a different trade-off: HELOC (flexible, variable-rate, no break cost), refinance (lower rate than HELOC but breaks your existing mortgage and may trigger an IRD penalty), second mortgage (preserves first mortgage rate but higher-cost), and Purchase Plus Improvements (only at purchase time). For most mid-range renovations on a held mortgage with a good rate, HELOC is the default — but the math can flip depending on your existing rate and how long you'll carry the renovation debt.
Who this is for
Homeowners with 20%+ equity considering renovations between $15k and $200k, including essential repairs and discretionary upgrades.
- Existing rate
- 2.4% with 2 yrs remaining (IRD-heavy)
- Refi rate today
- ~4.3% (on the full $525k post-reno)
- HELOC rate
- Prime + 0.5% (variable)
- Second mortgage rate
- ~6-9% private, varies by lender
- Refi break cost
- ~$8-12k IRD + fees
Framework
HELOC — the default for mid-size renos
Capped at 65% loan-to-value standalone or 80% combined with a mortgage. Interest-only payments allowed. Interest is tax-deductible only if funds are used to generate income — renovation on a principal residence is generally not deductible. Variable rate tied to prime. Application costs ~$300-500 plus appraisal. Best when your existing mortgage has a low rate you don't want to break.
Refinance — lower rate, but break math matters
Refinance into a new mortgage covering the existing balance plus renovation cost. Usually 20-80 bps better than HELOC. But breaks your existing mortgage — if you're mid-term on a fixed rate below current market, IRD penalty can easily exceed 2 years of HELOC interest savings. Refinance also resets your amortization, which can reduce monthly payment but extends total interest paid.
Second mortgage / private
Keeps the first mortgage untouched. Rates 5-10% depending on LTV and lender. Better for short-hold renovations where you plan to roll the debt at your next renewal. Higher setup costs (legal, broker fee 1-2%). Avoid unless the IRD math makes refi clearly wrong and you need more than HELOC can give.
Purchase Plus Improvements
Only at purchase — you borrow up to 10% of post-improvement value (max $40k typically) as part of your purchase mortgage. Funds held by the lawyer and released after work is complete and re-appraised. Useful for 'must-do' purchase-time improvements. Not applicable to already-owned homes.
Key considerations
- For essential repairs (roof, foundation, mould, electrical panel) where the home is actively deteriorating, the urgency often outweighs the rate-optimization question. HELOC speed wins.
- CRA's 'use of funds' test for interest deductibility applies to borrowed funds put toward income-producing use — straight home reno doesn't qualify, but building a rental suite might.
- Some lenders require renovation details (quotes, permits) before refinancing for reno — especially at higher LTVs.
- If your renovation includes adding a secondary unit, the appraised post-reno value increase can be substantial and unlocks a higher LTV ceiling.
Common mistakes
- Defaulting to refi because 'rates are lower' without running the IRD math on breaking a low-rate fixed.
- Assuming HELOC interest on a renovation is tax-deductible. Generally it isn't, unless the renovation produces income.
- Taking a second mortgage when a HELOC would do — the setup costs for second mortgages are meaningfully higher.
Action steps
- 01Pull your mortgage statement and get the break cost in writing from your current lender — don't estimate it.
- 02Compare total cost over your intended hold period (HELOC interest vs refi savings minus break cost). If within $2k, choose HELOC for flexibility.
- 03If the reno is $50k+ and your existing rate is above current market, refi is often the right call.