How much can you a 1% rate drop on $300k saves ~$40,000 total?

A 1% rate drop on $300k saves ~$40,000 total

Is it true that cash-out refinancing resets your loan — usually hurts long-term?

Cash-out refinancing resets your loan — usually hurts long-term

Is it true that short remaining term = almost never worth refinancing?

Short remaining term = almost never worth refinancing

Break-even calculation

When refinancing makes sense

The decision to refinance is entirely about break-even. If you stay past break-even, you win. Here's every factor that affects the math.

Quick answer

Refinancing makes sense when the new rate is at least 0.75-1% lower than your current rate, your closing costs divided by your monthly payment savings (the break-even point) is shorter than how long you plan to keep the home, and you have not significantly extended the loan term. A 1% rate drop on a $300,000 mortgage typically saves $40,000-$60,000 over the loan's life.

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Key takeaways

04 · ideas

Break-even = closing costs ÷ monthly savings
A 1% rate drop on $300k saves ~$40,000 total
Cash-out refinancing resets your loan — usually hurts long-term
Short remaining term = almost never worth refinancing

Illustrative chart

$200k · 7.5% · 30yr

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Refinancing means replacing your current mortgage with a new one — usually to get a lower interest rate, change the loan term, or access your home equity.

The core question is always the same: how long until the monthly savings repay the upfront costs?

This is your break-even point — the number of months until you're ahead:

$$\text{Break-even (months)} = \frac{\text{Closing costs}}{\text{Monthly payment reduction}}$$

Example: $5,000 in closing costs, new payment is $200/month lower → break-even is 25 months. If you'll stay in the home more than 25 months → refinance makes sense.

General rule: A rate reduction of at least 0.5–1% is typically needed to make refinancing worthwhile, depending on remaining loan size.