Mortgage Refinance Calculator
Breakeven, Savings & Trigger Rate — 2026
Enter your balance and current rate — get breakeven months, monthly savings, your trigger rate for a 3-year payback, and a no-cost refi comparison. Powered by live FRED rate data.
What the refinance calculator shows you
Most refi calculators show one number — monthly savings. HomeRates.ai shows the full decision: breakeven, trigger rate, no-cost vs paying costs, and a clear verdict on whether to act now or wait.
Breakeven analysis
Closing costs divided by monthly savings — the month at which you've fully recovered the cost of refinancing. With a timeline comparison: "strong", "good", "marginal", or "hold".
Trigger rate
The exact rate you need to see for a 3-year breakeven on your specific balance and closing cost estimate. The number to watch for — not a guess.
No-cost refi comparison
Lender credit covers closing costs in exchange for a higher rate. HomeRates.ai shows whether no-cost or paying upfront wins on your timeline.
FHA-to-conventional
Eliminates FHA MIP (0.55%/yr life of loan) plus gets a better rate. The combined MIP + interest savings often exceed a straight rate-and-term refi.
Live rate data
Pulls the live 30-year average from FRED (Freddie Mac PMMS) weekly. Your analysis uses the actual current market rate as the baseline.
Wait vs refi now
What if rates drop another 0.5%? Is it worth waiting? HomeRates.ai models both scenarios and shows the opportunity cost of waiting.
Refinance savings by balance and rate — 2026
Assumes 2% closing costs · 30-year refi · P&I savings only (taxes and insurance unchanged).
| Balance | Rate Change | Monthly Savings | Est. Closing Costs | Breakeven |
|---|---|---|---|---|
| $300k | 7.50% → 6.75% | $152/mo | $6,000 | 40 mo (3.3 yr) |
| $300k | 7.50% → 6.25% | $250/mo | $6,000 | 24 mo (2.0 yr) |
| $400k | 7.25% → 6.75% | $134/mo | $8,000 | 60 mo (5.0 yr) |
| $400k | 7.25% → 6.25% | $266/mo | $8,000 | 31 mo (2.6 yr) |
| $500k | 7.00% → 6.50% | $166/mo | $10,000 | 61 mo (5.1 yr) |
| $500k | 7.00% → 6.25% | $248/mo | $10,000 | 41 mo (3.4 yr) |
| $600k | 7.00% → 6.50% | $199/mo | $12,000 | 61 mo (5.1 yr) |
Savings are P&I only. Actual closing costs vary by lender and state. For educational purposes only.
How to read your breakeven — the verdict guide
Once you know your breakeven months, use this to interpret the result.
| Breakeven Period | Verdict | What to do |
|---|---|---|
| Under 24 months | ✅ Strong — refi now | Savings far exceed costs. Pull the trigger. |
| 24–36 months | ✅ Good — solid if staying 4+ years | Worthwhile if you plan to stay. |
| 37–48 months | 🟡 Marginal — depends on timeline | Pencils if staying 5+ years; consider no-cost refi. |
| 49–72 months | 🔴 Poor — wait for better rate | Spread too thin. Calculate your trigger rate. |
| Over 72 months | ⛔ Hold — not worth it | No-cost refi only path that makes sense. |
How HomeRates.ai calculates your refi
The calculation is deterministic — not AI-estimated. The same inputs always produce the same output, using actual amortization math on your remaining balance.
- Monthly savings calculated — P&I on your current balance at your current rate minus P&I at the new rate. Both computed on a full 30-year amortization (or your remaining term if specified).
- Breakeven computed — estimated closing costs (default 2% of balance, adjustable) divided by monthly savings. The exact month at which cumulative savings exceed costs.
- Trigger rate calculated — works backwards from a 3-year breakeven target to find the exact rate you need. The number to set a rate alert for.
- No-cost refi modeled — adds the closing cost equivalent as lender credit to the rate (typically +0.25%) and compares 10-year total cost vs paying upfront.
- FHA-to-conventional analyzed — if FHA, adds MIP savings (0.55%/yr on remaining balance) to the rate savings for a combined monthly benefit figure.
Frequently asked questions
How do I calculate if refinancing is worth it?
Breakeven months = closing costs ÷ monthly savings. If you plan to stay longer than the breakeven, refinancing saves money. Example: $8,000 costs ÷ $200/month savings = 40 months. If you'll stay 5+ years, that refi makes sense. HomeRates.ai calculates your exact breakeven and compares it against your expected timeline.
How much does refinancing save per month?
On a $400k balance, 7.25% → 6.25% saves $266/month. 7.25% → 6.75% saves $134/month. On a $500k balance, 7.0% → 6.5% saves $166/month. The calculator shows your exact number — and how many months until you've recovered the closing costs.
What are typical refinance closing costs in 2026?
1.5–2.5% of loan balance. On $400k that's $6,000–$10,000. Includes origination (0–1%), appraisal (~$650), title insurance, and escrow. A no-cost refi rolls these into a slightly higher rate (typically +0.125–0.375%) — zero upfront cash, immediate monthly savings, no breakeven risk.
What rate drop is needed to justify refinancing?
The 1% rule of thumb is outdated. The real answer depends on your balance and timeline. A 0.5% drop on $600k breaks even in ~5 years. A 1.0% drop breaks even in ~2.5 years. HomeRates.ai calculates your specific trigger rate for a 3-year breakeven — the number to watch for.
Should I refinance from FHA to conventional?
If you have 20% equity and 680+ credit, yes — eliminating FHA MIP (0.55%/yr, life of loan with under 10% down) saves $160+/month on a $350k balance. Combined with a rate drop, FHA-to-conventional refi can save $300+/month. HomeRates.ai models the full MIP + rate savings in one calculation.
What is a no-cost refinance?
The lender covers closing costs in exchange for a slightly higher rate (+0.125–0.375%). Benefit: zero upfront cash, immediate savings from day one, no breakeven risk. Best when you're unsure how long you'll stay or expect rates to drop further. HomeRates.ai shows whether no-cost or paying upfront is better for your specific timeline.
How accurate is the HomeRates.ai refinance calculator?
Deterministic calculation engine — same inputs, same output. Computes actual amortization on your remaining balance, uses live FRED 30-year data, and models no-cost refi, FHA-to-conventional, and rate-watch scenarios. For educational purposes only — not a commitment to lend.