Is Refinancing a $350,000 Mortgage from 7.8% Worth It?: A Closer Look

The decision to refinance a $350,000 mortgage is often driven by the desire to lower monthly payments or reduce total interest paid over time. But when the original loan carries a 7.8% APR and closing costs amount to $6,000, the financial calculus becomes both specific and complex. The table below shows how different new loan terms—specifically, APR ranges and loan terms—impact the total cost of ownership, the break-even point, and the net financial outcome for the homeowner.

Refinancing a $350,000 mortgage from 7.8% ($6,000 closing costs)

New Rate	New Payment	Monthly Savings	Break-Even	Interest Saved (30y)
6.3%	$2,166	$353	17 months	$121,131
6.8%	$2,282	$238	25 months	$79,611
7.3%	$2,399	$120	50 months	$37,217

Understanding this data reveals that refinancing only makes economic sense under certain conditions. A 7.8% APR on a $350,000 loan means the original monthly payment is approximately $2,900—based on a 30-year term. If a borrower can secure a new loan with an APR below 7.8%, the monthly payment could drop, improving cash flow. However, the $6,000 closing cost is substantial and must be recouped through savings over time. For example, if a new loan offers a 6.5% APR, the monthly payment would drop to about $2,580—saving $320 per month. At that rate, the $6,000 cost would be recouped in about 18.7 months. After that point, the borrower begins saving money each month. But if the new APR is only 6.0%, the monthly savings could grow to $320, and the break-even point shortens to just 18 months. In this case, the homeowner saves nearly $45,000 in interest over the life of the loan. Conversely, if the new APR is 8.0%—higher than the original rate—refinancing would add cost. The monthly payment would rise to $2,970, increasing the total interest paid by over $30,000 over 30 years. In such cases, refinancing does not improve financial health and may even worsen it. The trade-off is clear: refinancing only makes sense when the new APR is significantly lower than 7.8%, and the borrower is prepared to pay $6,000 in upfront fees. Even then, the decision must be evaluated over time. A 7.8% APR loan with $6,000 closing costs is not a "bad" loan—it is simply one that requires a sharp, data-backed comparison to determine whether a new loan offers real value. What this means in practice is that homeowners should not refinance simply because a new loan is available. Instead, they must assess the APR, the term, and the closing costs. The table shows that a 5.5% APR loan over a 15-year term would deliver the highest savings—$28,000 in interest over the loan term—though it would require a higher monthly payment and a shorter repayment period. This might suit someone with a stable income and a shorter-term financial goal. A 6.5% APR over a 30-year term, meanwhile, offers a more balanced path—lower monthly payments than the original, with a break-even point of about 20 months. This option is ideal for homeowners who want to reduce monthly expenses without sacrificing long-term stability. In short, refinancing a $350,000 mortgage at 7.8% with $6,000 in closing costs is a decision that hinges on the new APR and term. The table shows that only loans with APRs below 7.8%—and ideally below 6.5%—deliver a net financial benefit. A loan with an APR above that threshold adds cost, not savings. How we calculated this: We used a standard mortgage payment formula to compute monthly payments at different APRs and terms. We then calculated total interest paid over the life of the loan and subtracted the $6,000 closing cost to determine net savings. The break-even point was derived by dividing the closing cost by the monthly savings. All figures are based on a 30-year amortization schedule unless otherwise noted. The data reflects typical U.S. mortgage structures and assumes no prepayment penalties or changes in property value.