06Calculator
Refinance break-even
A refinance is worth doing when the saving clears the cost of leaving — and on commercial paper the cost of leaving is usually the prepayment penalty, not the closing costs.
- Break-even month
- Monthly change in payment
- Cumulative position curve
- Cash-out sized into the new loan
Illustrative only. Bollard is a fictional business built as a website demonstration — the figures below are worked examples, not an offer, a quote or a rate sheet.
Break-even
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Payment now
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Payment after
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Monthly change
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Cost of leaving
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Cumulative position
When you are ahead
Below the line is money spent; above it is money saved
Totals
Over the remaining term
By year
Cumulative net position
| Year | Saved to date | Net position |
|---|
Every input on this page lives in the address bar, so the link below reproduces exactly what you are looking at.
Assumptions and limits
What this model does and does not do
The comparison holds your current payment against the new one and charges the cost of leaving up front. A longer new amortisation lowers the payment and will always look better here — it is not the same as paying less interest, which is why the totals panel shows both.
Prepayment is modelled as a flat percentage of the balance. A step-down penalty falls each year, so the right figure is the one for the year you would actually close. Yield maintenance is not a percentage at all and has to be quoted by the servicer.
Nothing here models a defeasance, a new appraisal coming in low, or a lender that will not size the loan you have assumed. Those are the three reasons a refinance that models well does not close.
Cash out is added to the new loan and is not treated as a saving, because it is not one.
The other five
Next bay
Model it, then let someone check it
Calculators answer the arithmetic. What they cannot tell you is whether a lender will believe your net operating income, or which programme your equity actually supports.
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A demonstration number in the range reserved for fiction. It does not ring anywhere.