Should I Refinance Calculator
Skip the spreadsheet. Enter your current mortgage rate, the refi quote, and how long you plan to stay in the home — get a clear yes/no recommendation plus the breakeven month.
A "should I refinance" calculator answers the most common mortgage question with a clear yes or no. The decision rests on three numbers: rate drop, closing costs, and time horizon. Per Freddie Mac's January 2026 PMMS, the 30-year fixed mortgage averaged 7.04%, down from 7.34% one year prior. Bankrate's 2025 closing-cost survey put average refi closing costs at $4,500–$8,000 on a $400K loan. The rule of thumb: refinance pays off when the rate drop is 0.75%+ and you'll stay long past the breakeven month — typically 18–36 months. The calculator below applies that logic to your specific scenario and gives a one-word answer.
bolt Quick Answer
A should-I-refinance calculator computes (1) old monthly P&I; (2) new monthly P&I; (3) monthly savings; (4) breakeven months as closing costs ÷ monthly savings; and (5) whether your time horizon (planned years in the home) exceeds the breakeven by a comfortable margin. If horizon ≥ 2× breakeven AND rate drop ≥ 0.5% AND lifetime savings positive, the recommendation is YES. Otherwise NO. On a $400K mortgage at 7.5% with $5K closing costs and 5-year horizon, refinancing to 6.5% breaks even at month 12 with $52K lifetime savings: clear YES.
tips_and_updates Key Takeaways
- check_circle Refi YES when: rate drop ≥ 0.75% AND time horizon ≥ 2× breakeven AND lifetime savings positive.
- check_circle Closing costs typically run 2–6% of loan amount — get a Loan Estimate (LE) before deciding.
- check_circle Selling within 18–24 months almost always kills the refi math — closing costs aren't recovered.
- check_circle Restarting the 30-year clock can offset rate savings — calculate lifetime, not just monthly.
- check_circle Always shop at least 3 lenders — LendingTree 2024 study showed average $84K savings from comparing offers.
Get a Refinance Recommendation
Enter your current and refi rates, balance, closing costs, and how many years you plan to stay. Get a clear yes/no with breakeven and lifetime savings.
Recommendation
Loan Breakdown
Soft credit check — no impact on your score.
Why a Yes/No Beats Endless Number-Crunching
Decision in Seconds
Most borrowers spend hours comparing scenarios. The recommendation logic boils it down to a single answer based on the same factors a financial advisor would use.
Catch Bad Deals Early
If your time horizon is too short or rate drop too small, the calculator says NO before you waste money on closing costs.
No Credit Pull
All math runs in your browser. Test scenarios privately — nothing transmitted, no soft pull, no hard pull.
How the Should-I-Refinance Logic Works
The recommendation engine above checks four conditions sequentially. Condition 1: Monthly savings positive. If the new rate produces a higher monthly payment than your current loan, refi makes no sense — answer NO. Condition 2: Breakeven before you sell. Closing costs divided by monthly savings gives the breakeven month. If that exceeds your time horizon (planned years in the home), you'll never recover the closing costs — answer NO. Condition 3: Comfortable margin. Industry guidance recommends staying at least twice as long as the breakeven; otherwise the math is too thin. Condition 4: Material rate drop. Rate drops under 0.5% rarely produce enough monthly savings to clear typical closing costs in a reasonable time.
When all four conditions are met, the answer is YES. The Consumer Financial Protection Bureau's Refinance Comparison Worksheet (last updated 2024) uses essentially the same decision tree, and most mortgage advisors apply versions of these heuristics. The calculator produces a deterministic answer — same inputs always yield the same recommendation, removing the emotional component from a financially significant decision.
By the Numbers
The MBA's January 2026 Weekly Applications Survey shows refi applications up 28% YoY as borrowers respond to rates falling from the November 2024 peak of 7.79% (Freddie Mac PMMS). LendingTree's 2024 mortgage shopping study found borrowers who got 5+ rate quotes saved an average of $84,000 over the loan life versus those who took the first quote.
Five Common Refi Scenarios
The scenarios below use the same $400,000 loan balance, 30-year refi term, and $5,000 closing costs. Recommendation comes from the calculator's logic above.
| Scenario | Rate Drop | Monthly Saved | Time Horizon | Recommendation |
|---|---|---|---|---|
| Big drop, long stay | 1.50% | $612 | 10 years | YES — high confidence |
| Moderate drop, planned move | 0.75% | $298 | 2 years | NO — breakeven 17 mo > 24-mo horizon margin too thin |
| Small drop, long stay | 0.30% | $118 | 10 years | NO — rate drop below 0.5% threshold |
| Cash-out at higher rate | -0.25% | -$95 | Any | NO — payment increases |
| Big drop, short stay | 1.25% | $510 | 1 year | NO — selling before breakeven |
Calculations on $400,000 mortgage at 7.50% existing rate refinancing to a 30-year term with $5,000 closing costs. Recommendation logic uses 0.5% minimum rate drop and 2× breakeven horizon margin as thresholds.
Three Hidden Refi Costs to Account For
- chevron_right Restarting the amortization clock. A 30-year refi on a 25-year-remaining loan extends the total term by 5 years. Even with a lower rate, you may pay more total interest over the longer schedule. Calculate lifetime, not just monthly.
- chevron_right Lender credit traps. "No closing cost" refis offer lender credits that cover fees in exchange for a higher rate (typically 0.25–0.50% above standard). The breakeven shifts from upfront cash to lifetime rate cost — model both options.
- chevron_right PMI re-introduction. If your home value dropped or your equity is below 20%, the new loan may require PMI even if your old one didn't. Check the new loan's LTV before assuming PMI doesn't apply.
When the Calculator Says NO But You Should Refi Anyway
Three edge cases where the math says NO but the refi may still be worthwhile.
1. Switching from ARM to fixed-rate. Even at the same or slightly higher rate, locking a fixed payment may be worth it for budget predictability — especially if your ARM is about to reset upward.
2. Removing a co-borrower. Divorce, death, or partnership dissolution sometimes requires a refi to remove the other person from the mortgage. The math is dictated by the legal situation, not breakeven analysis.
3. Cash-out for high-rate debt consolidation. Even if monthly savings on the mortgage portion is small, rolling 22% credit card debt into a 7% mortgage at refi can save thousands annually. Calculate the consolidation portion separately and compare.
Should I Refinance Calculator FAQs
What's the rule of thumb for when to refinance? expand_more
The traditional rule: refinance when the new rate is at least 0.75–1.00 percentage points lower than your current rate, AND you'll stay in the home long enough to recover closing costs (typically 18–36 months). Both conditions must be true. A 1.5% drop with a planned move in 6 months still doesn't pay; a 0.25% drop with 30 years staying still doesn't pay. The calculator above applies this logic to your specific scenario.
How long does it take to break even on a refinance? expand_more
Breakeven equals total closing costs divided by monthly savings. With typical closing costs at $4,500–$8,000 and monthly savings of $200–$500 on a 0.75–1.0% rate drop, breakeven usually falls between 12 and 36 months. Below 18 months: very strong refi case. 18–36 months: solid case if you're staying long-term. Above 36 months: weak — only works if you're staying 7+ years.
Should I refinance to a 15-year mortgage? expand_more
Worth considering if the 15-year rate is 0.5%+ below your current rate AND you can comfortably afford the higher monthly payment. 15-year rates typically price 0.5–0.75% below 30-year (Freddie Mac PMMS January 2026: 6.27% vs 7.04%). On a $400K loan, 15-year saves $138K in lifetime interest versus 30-year, but monthly payment is roughly 50% higher. Run the math through the mortgage refinance calculator first.
Will refinancing hurt my credit score? expand_more
Slightly and briefly — typically a 5–15 point dip recovering within 3–6 months. Three small effects: (1) the lender pulls a hard credit inquiry (-5 to -10 points temporary); (2) the new loan replaces the old one, slightly shortening average account age; (3) any rate-shopping inquiries within a 14–45 day window count as one (FICO and VantageScore both deduplicate). Long-term, on-time payments on the new loan rebuild and exceed the prior score.
Can I refinance if my home value dropped? expand_more
Sometimes — but it's harder. Most lenders require 20% equity (80% LTV) for a standard rate-and-term refi. If your home value dropped enough that you have less equity, you may need to either pay down principal at refi to bring LTV under 80%, accept a higher rate, or pay PMI. Three special programs help: Fannie Mae's RefiNow and Freddie Mac's Refi Possible (income-based), VA IRRRL (no appraisal for VA loans), and FHA Streamline (no appraisal for FHA loans).
Should I do a cash-out refinance to consolidate debt? expand_more
The math often works if you're consolidating high-rate debt (credit cards 18%+) into a much lower mortgage rate. Saving 10+ percentage points on $20K of card debt is roughly $2,000/year in interest. The risks: (1) you've converted unsecured debt into secured debt — default now risks foreclosure; (2) you've extended a 5-year card paydown into 30 years of mortgage interest; (3) cash-out refis usually price 0.125–0.25% higher than rate-and-term. Run both the rate-and-term and cash-out scenarios separately.
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