Should You Refinance Your Mortgage? A Decision Framework
Refinancing can save thousands — or cost thousands if done at the wrong time. This guide walks through the break-even analysis, when rates justify a refi, cash-out vs. rate-and-term refinancing, and how Canadian renewal vs. refinancing decisions differ.
Refinancing replaces your existing mortgage with a new one — ideally at a lower rate, better term, or different structure. The decision hinges on a simple math problem: will your monthly savings recoup the upfront costs before you sell or pay off the home?
Refinance decision matrix
| Scenario | Likely verdict | Key consideration |
|---|---|---|
| Rate drop ≥ 1%, staying 5+ yrs | Refinance | Break-even likely under 24 months |
| Rate drop 0.5–1%, staying 3–5 yrs | Likely worth it | Model break-even carefully |
| Rate drop < 0.5% | Marginal | High closing costs may not be recouped |
| Moving within 2 years | Likely not worth it | Won't reach break-even |
| ARM about to reset higher | Consider locking in fixed | Payment certainty may justify cost |
| Canada: mid-term fixed break | Rarely worth it | IRD penalty often exceeds savings |
Step-by-step: deciding whether to refinance
The break-even point is how long you must stay in the home to recoup refinancing closing costs through monthly savings. Formula: break-even months = closing costs ÷ monthly payment reduction. Example: $5,000 in closing costs ÷ $200/month savings = 25 months (just over 2 years). If you plan to sell or move before the break-even, refinancing likely costs more than it saves. In Canada, also factor in any mortgage break penalty (IRD or 3-month interest).
Check your current mortgage rate on your statement or servicer portal. Compare it to current market rates for your loan type (30-year fixed, 15-year fixed, ARM). A general rule: refinancing typically makes sense if you can reduce your rate by 0.75%–1.0% or more. However, this is just a starting point — the actual benefit depends on your remaining loan balance, how many years are left, and closing costs. Use the mortgage calculator to model the exact monthly savings for your situation.
Lenders require minimum equity to refinance: conventional loans typically require 3–5% equity (97–95% LTV); to avoid PMI you need 20% equity (80% LTV); cash-out refinances are typically capped at 80% LTV. In Canada, refinances are capped at 80% LTV — you must have at least 20% equity. Check your current LTV with: (home value - remaining mortgage balance) ÷ home value. Rising home prices may have created equity you can leverage.
Apply with at least 3 lenders within a 14-day window — all hard credit inquiries within this window count as one inquiry for FICO scoring purposes. Compare: interest rate, APR (includes fees), origination charges, title/settlement fees, and total cash to close. The lender with the lowest rate is not always the best deal — compare APR and 5-year cost from the Loan Estimate comparisons table to identify true value.
Rate-and-term refinance: replaces your existing loan with a new loan at a better rate and/or term — closing costs are typically financed into the new loan or paid upfront. Cash-out refinance: takes a new loan larger than your current balance, with the difference paid to you in cash — useful for home improvements, debt consolidation, or other needs. Cash-out refis have slightly higher rates (+0.25%–0.625%) and stricter LTV limits (80% max). In Canada, cash-out is called "equity take-out refinancing" and is subject to the stress test at the new qualifying rate.
Once you choose a lender, lock your rate immediately — rates change daily. Rate lock periods are typically 30–60 days for a refinance. During processing: the lender will order a new appraisal (usually required, unless waiver is granted), verify income and employment, pull title, and prepare closing documents. Refinance closing is simpler than a purchase — you sign fewer documents and the right of rescission gives you 3 business days to cancel after signing.
Common questions
How do I know if refinancing makes financial sense?
Calculate three numbers: (1) Monthly savings: new payment vs. current payment; (2) Closing costs: typically 2%–5% of loan amount (average $3,000–$7,000 on a $300,000 loan); (3) Break-even months: closing costs ÷ monthly savings. If your break-even is 24 months and you plan to stay 5+ years, refinancing is financially sound. If break-even is 36+ months or you plan to move within 3 years, reconsider. Also factor in: how many years are left on your mortgage (refinancing a 25-year-old 30-year loan into a new 30-year loan extends your payoff date), and whether you're resetting an ARM that was about to adjust. Use the mortgage calculator to model exact scenarios.
What credit score do I need to refinance?
Credit score requirements for refinancing vary by loan type: (1) Conventional: minimum 620, but 740+ gets the best rates and avoids most LLPAs; (2) FHA refinance: minimum 580 for rate-and-term; 580–620 for FHA cash-out; (3) VA IRRRL (streamline): no minimum, no appraisal required for most VA-to-VA refi; (4) FHA Streamline: no minimum credit score for FHA-to-FHA with on-time payment history; (5) Jumbo: typically 720+. In Canada, A-lender refinances typically require 650+; credit unions and B-lenders may go lower. See how to build credit for a mortgage and CFPB — Credit history and mortgages.
How does refinancing in Canada differ from the US?
Key differences: (1) Stress test: Canadian refinances must pass the OSFI B-20 stress test at the higher of contract rate + 2% or 5.25% — this can prevent some borrowers from accessing a lower rate if they can't qualify at the qualifying rate; (2) Prepayment penalty: Canadian closed mortgages charge a break penalty — typically the greater of 3 months' interest or IRD (Interest Rate Differential). IRD penalties can be very large (often $10,000–$30,000+) for fixed-rate mortgages broken mid-term; (3) LTV cap: Canadian refinances are capped at 80% LTV; (4) Switch vs. refinance: at renewal, Canadians can "switch" lenders without penalty and without stress test (since November 2023) — different from mid-term refinancing. See Canada refinancing guide.
Is a cash-out refinance a good idea?
A cash-out refinance can be valuable for: (1) Home improvements: kitchen/bath renovations with high ROI; (2) Eliminating high-interest debt: consolidating credit cards at 20%+ into a 7% mortgage significantly reduces interest cost — but watch the debt payoff timeline (spreading credit card debt over 30 years could cost more total); (3) Major expenses: tuition, emergency medical costs. Caution: (1) You're converting unsecured debt to secured debt — failure to pay now risks your home; (2) Closing costs on cash-out refi: 2%–5% of the new loan amount; (3) Rates are slightly higher (+0.25%–0.625%) than rate-and-term; (4) LTV is capped at 80% for conventional, 80% in Canada. Alternatives: HELOC (no closing costs, variable rate, revolving credit) may be better for uncertain amounts. See cash-out refinance glossary.
Does refinancing reset your mortgage term?
Yes — when you refinance into a new 30-year mortgage, your payoff date resets to 30 years from now. If you've been paying for 7 years on a 30-year loan, you now have 30 new years instead of 23 remaining — extending your total mortgage tenure significantly. Strategies to avoid this: (1) Refinance into a shorter term (15-year or 20-year) — higher monthly payment but much less total interest; (2) Continue paying the same monthly amount as before — the additional principal payment accelerates payoff; (3) Use the calculator to compare: total interest paid over full new term vs. remaining interest on current loan. Many borrowers focus only on the lower monthly payment without realizing the full cost of resetting the clock. See 15 vs 30-year mortgage comparison.
Read the Canada refinancing guide, explore cash-out refinance, or use the mortgage calculator.