Refinancing replaces your existing mortgage with a new one — usually to get a lower rate, change the loan term, or tap home equity. It sounds straightforward, but it has real costs and a break-even timeline that most people don't calculate.
The Break-Even Calculation
The single most important refi calculation:
Break-even months = Closing costs ÷ Monthly savings
Example: you're dropping from 7.25% to 6.5% on a $380,000 loan. Your P&I drops from $2,593 to $2,403 — a savings of $190/month. If closing costs are $7,600, your break-even is 40 months (about 3.3 years). If you plan to stay past that, refinancing makes financial sense.
When Refinancing Clearly Makes Sense
- Rates have dropped 0.5–1.0%+ below your current rate and you plan to stay past the break-even
- You're on an ARM and want to lock in a fixed before an adjustment resets to a higher rate
- You want to shorten your term (e.g., 30yr to 15yr) to pay off faster and reduce total interest — even if the rate doesn't drop much
- You need to remove PMI and a rate-and-term refi at your new appraised value pushes LTV below 80%
When Refinancing Is a Trap
- Rate drop is too small.A 0.25% drop on a $300k loan saves ~$50/month. If closing costs are $6,000, break-even is 10 years. Not worth it unless you're staying.
- Restarting the clock.If you're 10 years into a 30-year loan and you refi into a new 30-year, you've extended your payoff date by 10 years. Your monthly payment may drop, but you'll pay far more total interest. Consider a 20-year or 15-year loan instead.
- Cash-out at a bad time.Cash-out refis replace home equity with debt. If rates are high and you're pulling equity to consolidate credit cards, you're trading expensive short-term debt for long-term mortgage debt — not always a win.
- You're moving soon.If you won't stay past the break-even, the closing costs are a pure loss.
Rate-and-Term vs. Cash-Out Refinance
| Type | What changes | Typical use case |
|---|---|---|
| Rate-and-term refi | Rate, term, or both | Lower monthly payment or pay off faster |
| Cash-out refi | Rate + loan balance increases | Access home equity for renovations, debt payoff |
| Streamline refi | Rate (simplified underwriting) | FHA-to-FHA or VA-to-VA only; faster process |
What Refinancing Actually Costs
Closing costs on a refi are similar to a purchase: typically 2–3% of the loan amount. On a $380,000 loan, expect $7,600–$11,400. These costs can be:
- Paid out of pocket — largest short-term hit but lowest long-term cost
- Rolled into the loan — no upfront cash but you pay interest on the fees over the life of the loan
- Covered via lender credits — lender pays fees in exchange for a slightly higher rate (no-closing-cost refi)
No-Closing-Cost Refinancing
A no-closing-cost refi sounds appealing but isn't free — you get a higher rate instead of paying fees upfront. The effective cost is spread across every month for the rest of the loan. These make sense only if you're fairly confident you'll refinance again within a few years (e.g., in an environment where rates are expected to keep falling).