When to Refinance Your Mortgage — The Break-Even Analysis You Need

Refinancing costs money upfront — typically $3,000–$6,000 in closing costs. Whether it makes sense depends on how long it takes your monthly savings to recover those costs.

Break-even formula: Closing costs ÷ Monthly savings = Break-even months

Example: $4,500 closing costs ÷ $180/month savings = 25 months to break even.

If you plan to stay in the home longer than your break-even point, the refinance saves you money. If you might move or refinance again before that point, you're likely better off waiting.

The old rule of thumb was 'refinance when rates drop 1%.' That's outdated — the right threshold depends on your loan balance and how long you'll stay.

On a $500,000 loan: Even a 0.5% rate drop can save $140–$160/month — worth refinancing for anyone staying 3+ years.

On a $150,000 loan: A 1% rate drop saves ~$80/month. With $4,000 in closing costs, break-even is 50 months.

Run the numbers on your actual balance. Don't let the '1% rule' stop you from refinancing a large loan when rates drop 0.5–0.75%.

Rate/term refinance: You're refinancing to change the rate, the term (30→15 year), or both. No cash comes out. This is a 'pure' refinance — the goal is lowering your payment or paying off faster.

Cash-out refinance: You borrow more than you currently owe and take the difference as cash. Rates are typically 0.125–0.5% higher than a rate/term refi. Common uses: home renovations, debt consolidation, college tuition, large purchases.

Cash-out considerations: You're resetting your amortization. If you're 10 years into a 30-year loan and cash-out into a new 30-year, you've extended your repayment by a decade. Run the long-term cost carefully.

You're close to payoff: If you're 20+ years into a 30-year mortgage, most of your payment is now principal. Refinancing into a new 30-year resets the amortization and dramatically increases total interest paid.

You're moving soon: If you'll sell within 2–3 years, you'll rarely break even on closing costs.

Your credit has deteriorated: Refinancing with a lower credit score than your original loan can result in a higher rate, not a lower one.

You're close to 20% equity on a conventional loan: If you're about to eliminate PMI naturally, refinancing now might not be worth the closing costs — you'll lose PMI soon regardless.

Refinancing a 30-year loan into a 15-year loan is a powerful wealth-building move — but only if the payment is comfortable.

15-year rates are typically 0.5–0.75% lower than 30-year rates. On a $350,000 balance at 7% (30-year) vs. 6.25% (15-year): the 15-year payment is about $700 higher per month but you save roughly $235,000 in total interest.

Don't stretch into a 15-year if it puts your DTI uncomfortably high. A cash reserve is more valuable than maximum equity accumulation.