Refinancing replaces your current mortgage with a new one — typically to get a lower rate, access equity, or restructure your debt. It’s not always the right move: timing, costs, and your specific financial situation determine whether refinancing saves you money or costs you more. This framework helps you decide.
The five reasons to refinance
| Reason | When It Makes Sense | When It Doesn’t |
|---|---|---|
| Lower interest rate | Rate drop of 0.5%+ with 2+ years remaining on term | Small rate change or renewal is close |
| Debt consolidation | High-interest debt (credit cards/loans) exceeding $10,000+ | If you’ll re-accumulate the debt |
| Access home equity | Renovations, investment, or major expense | If you don’t need the funds urgently |
| Change mortgage terms | Switch from variable to fixed (or vice versa), extend amortization | If your current terms are working fine |
| Life changes | Divorce (remove spouse), add partner, estate settlement | If simpler alternatives exist (blend and extend, assumption) |
Reason 1: Refinancing for a lower rate
This is the most common reason. The calculation is straightforward: do your interest savings exceed the penalty and fees?
Decision framework
| Question | If Yes | If No |
|---|---|---|
| Is the rate difference 0.5%+? | Continue evaluation | Probably not worth it |
| Do you have 2+ years left on your term? | Continue evaluation | Wait for renewal |
| Is the break-even under 24 months? | Refinance | Consider blend and extend |
| Is this a variable-rate mortgage? | Penalty is low (3 months interest) — often worth it | Calculate IRD carefully |
Example: Rate refinance calculation
| Detail | Current | After Refinance |
|---|---|---|
| Mortgage balance | $420,000 | $420,000 |
| Rate | 5.40% | 4.10% |
| Monthly payment | $2,547 | $2,212 |
| Monthly savings | — | $335 |
| Prepayment penalty | — | $12,500 (IRD) |
| Legal fees | — | $1,200 |
| Appraisal + discharge | — | $700 |
| Total cost | — | $14,400 |
| Break-even | — | 43 months |
At 43 months, this refinance is marginal on a 5-year term. If you had a variable rate with a $5,250 penalty, the break-even drops to 21 months — much more attractive.
Reason 2: Debt consolidation
Rolling high-interest debt into your mortgage can dramatically reduce your monthly payments and total interest cost.
Example: Debt consolidation
| Debt | Balance | Rate | Monthly Payment |
|---|---|---|---|
| Credit card 1 | $15,000 | 20.99% | $450 |
| Credit card 2 | $8,000 | 19.99% | $240 |
| Car loan | $22,000 | 7.49% | $435 |
| Total non-mortgage debt | $45,000 | — | $1,125/month |
After consolidation into mortgage at 4.25% over 25 years:
| Detail | Before | After |
|---|---|---|
| Mortgage payment | $2,200 | $2,450 |
| Other debt payments | $1,125 | $0 |
| Total monthly payments | $3,325 | $2,450 |
| Monthly savings | — | $875 |
Warning: You’re converting unsecured debt (credit cards) into secured debt (your home). If you can’t make payments, you risk losing your home. Only consolidate if you address the spending habits that created the debt.
Requirements
| Requirement | Details |
|---|---|
| Minimum equity | 20% after refinance (80% max LTV) |
| Example | Home worth $600K: max mortgage $480K. If current mortgage is $400K, you can access $80K |
| Re-qualification | Must pass the stress test at the current qualifying rate |
| Appraisal | Required to confirm current home value |
Reason 3: Access home equity
| Use | Typical Amount | Consideration |
|---|---|---|
| Home renovations | $25,000–$150,000 | Renovations that increase property value can offset the borrowing cost |
| Investment | Varies | Tax-deductible if used for income-producing investments (Smith Manoeuvre) |
| Education | $20,000–$80,000 | Government student loans often have better terms |
| Emergency fund | $10,000–$50,000 | A HELOC may be more flexible than refinancing |
| Business startup | Varies | High risk — consider carefully before pledging your home |
Refinancing vs HELOC for equity access:
| Factor | Refinance | HELOC |
|---|---|---|
| Rate | Fixed or variable (lower) | Variable (prime + 0.5%–1.0%) |
| Payment structure | Blended principal + interest | Interest-only minimum |
| Flexibility | One-time lump sum | Revolving credit line |
| Rate certainty | Can lock in fixed | Rate fluctuates with prime |
| Best for | Large one-time expense | Ongoing or uncertain amounts |
→ See: HELOC vs Refinancing
Reason 4: Changing mortgage terms
| Change | Why | Impact |
|---|---|---|
| Variable to fixed | Lock in certainty if rates may rise | Higher rate but predictable payments |
| Fixed to variable | Rates are falling and you want to benefit | Lower payments but rate risk |
| Extend amortization | Lower monthly payments | More total interest over the life of the mortgage |
| Shorten amortization | Pay off mortgage faster | Higher payments but significant interest savings |
| Change payment frequency | Switch to accelerated bi-weekly | Equivalent of one extra monthly payment per year |
Reason 5: Life changes
| Situation | What Refinancing Does |
|---|---|
| Divorce | Removes ex-spouse from the mortgage; one partner takes full ownership |
| Adding a partner | Adds new partner to the title and mortgage |
| Inherited property | Replaces existing mortgage with one in beneficiary’s name |
| Selling and buying simultaneously | May be combined with porting, bridge financing, or a new mortgage |
→ See: Mortgage After Divorce
The full cost of refinancing
| Cost | Amount | Notes |
|---|---|---|
| Prepayment penalty | $2,000–$25,000+ | Variable = 3 months interest; Fixed = greater of 3 months or IRD |
| Legal fees | $1,000–$2,000 | Some lenders cover this for switches |
| Appraisal | $300–$500 | Required if accessing equity or switching lenders |
| Title search and insurance | $250–$400 | Standard closing cost |
| Discharge fee | $200–$350 | Charged by your current lender |
| Registration fee | $50–$100 | Land registry fee |
| Total typical range | $4,000–$30,000 | Depends heavily on penalty type |
When to refinance vs alternatives
| Situation | Best Option |
|---|---|
| Rate drop with 2+ years left, low penalty | Refinance |
| Rate drop with 2+ years left, high IRD penalty | Blend and extend |
| Renewal within 6–12 months | Wait for renewal |
| Need to access equity | Refinance (lump sum) or HELOC (revolving) |
| Consolidating small debt (<$10K) | Personal line of credit may be simpler |
| Consolidating large debt (>$25K) | Refinance |
| Switching variable to fixed mid-term | Blend and extend or refinance (penalty is only 3 months) |
| Divorce | Refinance (required to change title and mortgage) |