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GuideReal Estate

How to Calculate Whether Refinancing Will Save Money

Compares your current loan against a new one and works out how many months it takes for the savings to cover the refinancing costs.

Editorial illustration representing the Refinance Break-Even workflow.
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Refinancing is worth it when the interest saved exceeds the cost of switching. That is a break-even date, not a feeling — and the honest question is whether you will still be there when it arrives.

What the Refinance Break-Even does

Compares your current loan against a new one and works out how many months it takes for the savings to cover the refinancing costs.

The trap it is designed to expose: a lower rate on a longer term can reduce the monthly payment while increasing the total you pay. The break-even tells you about the costs; the total tells you about the term.

Open the Refinance Break-Even and follow the settings and checks below.

What decides whether it is worth it

Setting What it means
Break-even Refinancing costs ÷ monthly saving = months to recover
The key question Will you still hold the loan past that date?
Resetting the term A new 30-year term restarts the interest-heavy early years
Lower payment, higher total Common when the term is extended — check both
Rate range 0–30% a year
Term range 1–50 years
Not modelled Early repayment charges on the existing loan

How to use it

  1. Enter your current balance, rate and years remaining.
  2. Enter the new rate, new term and all refinancing costs.
  3. Read the break-even — if you would move or repay before then, it does not pay.
  4. Compare total repaid on both, not just the monthly payment.

Practical advice

Check for an early repayment charge on your existing loan before doing anything else. It is a cost of switching like any other and belongs in the refinancing costs field — leaving it out is the most common way a break-even calculation comes out wrong.

Common questions

How do I know if refinancing is worth it?

Compare the break-even month against how long you realistically expect to keep the loan. If the costs take four years to recover and you might move in two, it does not pay however attractive the new rate looks.

My payment drops but the total goes up. Why?

Because the new term is longer. Refinancing a loan with 26 years left into a fresh 30-year term lowers the payment and adds four years of interest. Matching the remaining term rather than restarting avoids that.

What counts as refinancing costs?

Arrangement and valuation fees, legal costs, and any early repayment charge on the loan you are leaving. That last one is the one people forget, and it is often the largest.

Does a lower rate always save money?

Only if the term and costs cooperate. Rate, term and fees together decide the total — which is why comparing offers on total repaid rather than headline rate is the only reliable method.

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Vootkit provides general educational estimates, not mortgage, investment, legal, valuation or financial advice. Lending rules, taxes, transaction costs and property markets vary. Check actual offers and consult appropriately licensed professionals before acting.

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