Refinance vs. Renew Calculator

What the Refinance vs Renew Calculator does

Most homeowners approaching the end of a term only think about renewing versus refinancing. There is almost always a third option — renew with your current lender and add a HELOC or second mortgage separately — and it is very often the one that actually costs the least. This calculator builds out all three paths on the same basis and tells you which one wins on your numbers.

It is built as a decision tool, not a rate lookup. Each path is priced with its own upfront costs, its own blended cost of funds, and its own five-year total cost, and the calculator ends with a recommended path and the reason behind it — not a table you have to interpret yourself.

• A three-way comparison: renew, refinance, or renew plus a HELOC
• The blended cost of funds for each path — the sophisticated metric that actually decides the answer
• Five-year total cost, including upfront fees and the balance you would still owe
• A recommended path with the reasoning stated in one sentence
• A break-even comparison between refinancing and the renew-plus-HELOC path when cash is needed

The key variables that move the answer — and how lenders treat them

One question decides most of this comparison, and it is not the rate — it is whether you actually need new funds.

• Whether you are at renewal — at renewal, both renewing and refinancing are free of any penalty; mid-term, refinancing means breaking your current mortgage first, and that cost can dominate the entire comparison.
• Whether you need cash — with no cash need, this collapses into a straight rate comparison, and renewing usually wins since refinance rates are typically priced slightly above renewal rates. Add a genuine cash need and the comparison opens up to a real three-way decision.
• Loan-to-value ceilings — a refinance is capped at 80% of your home's value; a standalone HELOC is capped lower, at roughly 65%. These are different ceilings, so the amount of cash you need can itself rule one path out before the rates even matter.
• Purpose of the funds — for debt consolidation specifically, the comparison should not stop at "do I access equity or not" — leaving high-interest unsecured debt untouched is itself a cost, and this calculator prices that into the renew-only path so the comparison stays honest.

How this is actually calculated

Renewing recalculates your payment on your existing balance at the offered renewal rate, with no new funds added and only a nominal fee for switching or discharge if applicable. Refinancing folds your balance, any cash-out (capped at 80% loan-to-value), and every upfront cost — penalty, legal, appraisal — into a single new mortgage priced at the refinance rate. Renewing plus a HELOC keeps your mortgage exactly as a renewal would, and prices the additional funds separately as an interest-only draw against a standalone HELOC, capped at roughly 65% loan-to-value.

Each path's blended cost of funds is the weighted average interest rate across whatever debt that path leaves you carrying: a refinance produces a single rate almost by definition, while a renew-plus-HELOC blends the mortgage rate and the HELOC rate by the balance of each. Five-year total cost is the sum of every payment made over five years, plus whatever balance is still owed at that point, plus upfront costs — the same true-cost logic used across every calculator on this site, applied here to three different structures rather than three different rates.

If cash is needed for debt consolidation specifically, the renew-only path also carries an estimate of the interest you would keep paying on the unsecured debt you did not pay off, using a typical unsecured credit rate. That is what makes the comparison fair — renewing is not free of cost in that scenario, it just moves the cost somewhere the mortgage numbers would otherwise hide it.

• Renew: existing balance, renewal rate, existing amortization
• Refinance: (balance + cash-out + penalty + fees), refinance rate, capped at 80% LTV
• Renew + HELOC: mortgage unchanged, HELOC drawn separately, capped at roughly 65% LTV
• Five-year total cost: payments made + upfront cost + balance owing at year five

What you get from this calculator, and how a broker uses it

This is the exact framework a broker works through with a renewing client who mentions needing funds for something — and it is deliberately not reduced to "refinance is always cheaper" or "renewing is always safer," because neither is reliably true.

• Recommended path — the headline answer, with the specific reason it wins on your numbers
• Blended cost of funds — the number that actually separates these options once the rates alone stop telling the whole story
• Five-year total cost per path — the figure to bring into an actual decision, not the rate comparison alone
• Break-even versus renew plus HELOC — useful if you plan to pay the extra funds off faster than the mortgage itself

Using your results well

Treat the recommended path as the starting point for a conversation, not the end of one. The renew-plus-HELOC path in particular carries flexibility a single blended refinance does not — you can pay it down aggressively, redraw it, or leave it untouched — and that flexibility has real value this calculator prices only partially.

This calculator does not model your specific lender's exact HELOC terms, refinance pricing, or whether a straight switch at renewal is available to you without penalty. It also assumes a single interest-only HELOC structure; an amortizing HELOC or second mortgage changes the monthly payment materially. Use the numbers here to frame the conversation, then confirm the specifics with a broker before committing to any one path.

• Get an exact penalty figure from the mortgage penalty calculator if you are mid-term
• Confirm actual HELOC and refinance rates available to you — these move independently of posted mortgage rates
• Weigh the flexibility of a HELOC against the single-payment simplicity of a refinance
• Revisit this comparison if your renewal offer or the cash amount needed changes materially

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