Is Refinancing a $350,000 Mortgage from 7.8% Worth It?

The decision to refinance a mortgage is not just about saving money—it’s about understanding the trade-offs between current interest rates, closing costs, and long-term financial outcomes. For borrowers with a $350,000 loan currently at 7.8% APR, the path forward hinges on whether a new rate can offset the $6,000 in closing costs. The table below shows how different refinancing terms and APRs affect the total cost of ownership over time.

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 scenario requires looking beyond headline rates. A 7.8% APR on a $350,000 loan means annual interest payments of $27,300—over $273,000 in interest over 30 years. That’s nearly $10,000 more than a 6.5% loan would cost over the same period. But refinancing doesn’t just reduce interest—it introduces new costs and risks. The $6,000 closing fee is a non-negotiable outlay. If the new loan has a higher APR, even slightly, the savings may vanish or reverse. The table reveals that refinancing only makes sense when the new APR is significantly lower than 7.8%, and when the loan term is long enough to amortize the closing cost. A key insight from the data is that refinancing at a 6.0% APR over a 30-year term would save approximately $120,000 in interest over the life of the loan. However, that benefit only materializes if the closing costs are fully recouped over time. The breakeven point—when the savings from lower interest equal the $6,000 in fees—occurs in about 6.5 years. That means borrowers must plan for at least seven years of stable payments before realizing any net savings. For someone planning to sell or move within five years, this makes refinancing a poor financial decision. Moreover, the APR range in the table shows a critical gap: while some offers fall between 5.5% and 6.0%, others hover near 7.0% or higher. A 7.0% APR would not only maintain the original interest burden but could actually increase it due to the higher rate and the fixed closing cost. In such cases, the borrower pays more in interest and spends $6,000 upfront—no net benefit. Only when the new APR drops below 6.0% does the refinancing offer a meaningful cost reduction. Even then, the savings must be weighed against potential risks: a drop in the loan value due to market declines, or a shift in interest rates that could push rates upward again in the future. Another factor is the loan term. A 15-year refinance might save more in interest, but it comes with higher monthly payments and less flexibility. The table shows that shorter terms reduce total interest but increase monthly obligations—making them less accessible for borrowers with fixed or variable income. A 30-year term offers stability, but it means the $6,000 closing cost is spread over decades, reducing its impact. However, if interest rates rise in the next few years, a borrower locked into a 30-year fixed rate could face a higher rate in the future than they initially expected. For borrowers in this position, the most practical approach is not to refinance simply because the rate is lower, but to evaluate whether the new APR reduces their monthly payment by at least $150—enough to offset the $6,000 fee over time. The table confirms that only a few offers meet that threshold. Most do not, especially when the APR remains above 6.5%. How we calculated this: We used a standard amortization model to project total interest paid over 30 years for a $350,000 loan at different APRs. We then subtracted the original interest cost and added the $6,000 closing cost as a one-time expense. The net savings were calculated as the difference between total interest at the original rate and total interest at the new rate. The breakeven point was found by dividing the closing cost by the monthly interest savings. Results are based on a 30-year term and a constant interest rate throughout.