$300/month extra — savings at every loan amount and rate
$300/month sits in a practical sweet spot for many homeowners. It's roughly the cost of a car payment, a generous dining budget, or cable plus streaming services. Redirecting that amount toward your mortgage produces results that might surprise you.
| Loan Amount | At 6% | At 6.5% | At 7% |
|---|---|---|---|
| $200,000 | $61,400 saved / 10 yrs cut | $69,200 saved / 11 yrs | $77,500 saved / 11.5 yrs |
| $250,000 | $72,800 saved / 9 yrs | $82,000 saved / 9.5 yrs | $91,500 saved / 10 yrs |
| $300,000 | $79,400 saved / 8 yrs | $89,700 saved / 9 yrs | $100,000 saved / 10 yrs |
| $350,000 | $83,500 saved / 7.5 yrs | $95,000 saved / 8 yrs | $107,000 saved / 9 yrs |
| $400,000 | $86,200 saved / 7 yrs | $98,500 saved / 7.5 yrs | $112,000 saved / 8 yrs |
Notice something interesting: the years cut decreases as the loan amount increases, but the dollar savings increase. That's because $300 is a larger proportion of a $200K loan than a $400K loan, so it shaves more time — but the higher balance generates more interest to eliminate.
Why $300/month is the sweet spot
It's big enough to make a serious dent. At most loan amounts and rates, $300/month cuts roughly a decade off a 30-year mortgage. That's the difference between paying off your home at 55 vs 65, or at 45 vs 55. For retirement planning, those extra debt-free years are transformative.
But it's also achievable for most dual-income households. A combined income of $90,000+ typically has enough budget flexibility to find $300/month, especially after other debts are paid off. You don't need to be wealthy — you need to be intentional.
📊 Where to find $300/month for overpayments
$300/month compared to $100 and $500
Context helps. Here's how $300 stacks up against other common extra payment amounts on a $300,000 mortgage at 6.5%:
$100/month saves $43,500 and cuts 4.5 years. Good, but modest. $300/month saves $89,700 and cuts 9.5 years — more than double the savings of $100. $500/month saves $118,000 and cuts 13.5 years. The jump from $100 to $300 is where the most value-per-dollar lives. Going from $300 to $500 adds another $28,300 in savings but requires $200 more per month. If budget is tight, $300 gives you the best bang for your buck.
Not sure $300 is the right amount for you? The $100/month breakdown shows what a more modest start looks like, the $200/month guide is the middle ground, and the $500/month guide shows what aggressive overpaying does. If you've got a lump sum to work with instead, our lump sum vs monthly guide compares the two approaches. The extra payments calculator handles any amount.
Rate context from Freddie Mac's weekly survey. Your prepayment rights are covered in the CFPB's homeowner resources — worth reading to confirm your servicer won't apply extra payments to future months instead of principal.
Calculate Your $300/Month Savings
Enter your exact balance, rate, and current payment. See how $300 extra per month changes your payoff timeline and total interest.
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