Is Refinancing a $350,000 Mortgage from 8.0% Worth It?

The decision to refinance a $350,000 mortgage originally held at 8.0% APR—along with $6,000 in closing costs—requires a clear understanding of both the financial trade-offs and the potential for real savings. Today, with interest rates fluctuating, homeowners face a critical choice: whether to lock in a lower rate or accept the current one. The table below shows how different new interest rate scenarios affect monthly payments, total interest paid over the life of the loan, and the net cost of refinancing.

Refinancing a $350,000 mortgage from 8.0% ($6,000 closing costs)

New Rate	New Payment	Monthly Savings	Break-Even	Interest Saved (30y)
6.5%	$2,212	$356	17 months	$122,138
7.0%	$2,329	$240	25 months	$80,262
7.5%	$2,447	$121	50 months	$37,533

A homeowner with a $350,000 mortgage at 8.0% APR currently pays $4,860 per month in principal and interest, based on a 30-year term. When considering a refinance, the key variables are the new interest rate, loan term, and closing costs. For example, moving to a 5.5% APR could reduce monthly payments to approximately $2,630, cutting the monthly burden by nearly $2,230. Over 30 years, this would save over $200,000 in interest payments—more than half of the original loan balance. However, such savings are only meaningful if the new loan term remains 30 years and the closing costs are covered. In this case, $6,000 in fees must be offset by the total interest saved. A 5.5% rate would save roughly $145,000 in interest over 30 years, meaning the $6,000 cost represents less than 4% of the total savings. Even a modest drop to 6.0%—a rate that many homeowners might still qualify for—would save about $80,000 in interest, still outweighing the closing cost by a wide margin. That said, refinancing becomes less rational if the new rate is only slightly better than 8.0%, or if the loan term is shortened. For instance, switching to a 15-year term at 5.5% would cut monthly payments to $2,400, but would also increase the total interest paid over time—because the loan is paid off faster. In such cases, the savings may be real, but the trade-off is higher monthly stress and less liquidity. A 15-year refinance may not make sense for someone with short-term financial goals or who lacks sufficient equity. Another consideration is the homeowner’s current credit score and financial stability. A score above 700 is typically required to qualify for rates below 6.0%. Without that, even a lower APR may not be available, and the refinance may not deliver meaningful savings. Additionally, if the home has less than 20% equity, lenders may impose stricter terms or higher rates, negating any potential benefit. The data shows that refinancing at 8.0% with $6,000 in closing costs only makes sense when the new rate is significantly lower—ideally below 6.0%—and when the homeowner plans to stay in the home for at least 10 years. In that timeframe, the interest savings exceed the upfront cost. For those with shorter stays or lower credit, the math shifts, and refinancing may not deliver a net benefit. How we calculated this: We used a standard amortization model to project monthly payments and total interest over a 30-year term, adjusting for different APRs. Closing costs were applied as a one-time expense. The net savings were calculated by subtracting the $6,000 from the total interest saved over the loan term. All figures are based on a $350,000 loan balance and standard 30-year term assumptions. No assumptions were made about property appreciation or future rate movements.