Education, not advice. Your AI Auntie is not a mortgage broker, a lender, or a financial advisor. This is how I’d run the numbers for myself before I ever pick up the phone.
Y’all. Mortgage rates just slid under 6.20% for the first time in months and if you bought your house in 2023 or 2024 when rates were pushing 7%, you might already be sitting on a refinance opportunity and not know it.
Here’s the thing nobody tells you: you don’t need a mortgage broker to check the math. You need fifteen minutes, your current loan statement, and a free AI tool. That’s it. And once you know whether the math even works in your favor, then you can decide whether it’s worth the phone calls.
Let me walk you through the exact 5-minute check the AI Auntie does.
Why This Matters Right Now
As of late April 2026, the average 30-year fixed mortgage rate is 6.13%. Fannie Mae is forecasting rates to settle around 6.1% through the rest of 2026 and into 2027. The 15-year fixed is around 5.63%.
If you closed your loan when rates were 7% or higher …that includes most of 2023 and the back half of 2024 so you are now in genuine refinance territory.
But here is the rule the AI Auntie lives by: a refi only makes sense if the math makes sense. And the math is not just “lower rate, save money.” It’s:
- How much do I save each month?
- How long does it take to recoup the closing costs?
- How long do I plan to stay in this house?
If your monthly savings × the months you’ll stay there is more than your closing costs, refinancing makes sense. If it’s not, it doesn’t, no matter how exciting the new rate looks.
That’s the whole game. Five minutes, three numbers, one prompt.
What You Need Before You Open ChatGPT
Pull these five things before you open the AI tool. Doing it this way means the prompt actually works.
1. Your current monthly mortgage payment (just the principal and interest part — not the escrow, taxes, or insurance, which usually don’t change). It’s on your statement. Or in your servicer’s online portal under “Payment Details.”
2. Your current interest rate. Same statement. It will say something like “5.875%” or “6.999%.”
3. Your current loan balance. What you still owe. Different from what you originally borrowed.
4. Your current loan term remaining. If you took out a 30-year loan three years ago, you have 27 years left. Most servicer portals show this.
5. The new rate you’d realistically qualify for. Don’t guess. Use the publicly published average for your loan type as a starting point. Today that’s around 6.13% for a 30-year fixed. If your credit is excellent, slightly lower. If it’s bruised, slightly higher.
Got those five? Cool. Open ChatGPT (or Claude, or Gemini — they all work).
The AI Auntie’s Refi Math Prompt
Copy and paste this. Fill in your actual numbers.
“I’m running a refinance math check. Here are my numbers. Help me calculate the monthly savings, the breakeven point, and whether this refi makes sense given how long I plan to stay in my home.
Current loan balance: $______ Current interest rate: ____% Current monthly principal & interest: $______ Years remaining on current loan: ____
New loan offer: New interest rate: ____% New loan term: ____ years Estimated closing costs: $______ (use 2-3% of loan balance if I’m not sure)
I plan to stay in this home for at least ____ more years.
Please give me: 1. New estimated monthly payment (principal & interest only) 2. Monthly savings 3. Breakeven point in months 4. Total interest saved if I stay the full new loan term 5. Total interest cost difference if I sell or move in 5 years 6. Plain-English bottom line: does this math work in my favor?”
That’s it. Twenty seconds to type, two seconds for the AI to answer.
What the Output Actually Tells You
The AI is going to spit back something like:
- New monthly payment: $1,847
- Monthly savings: $193
- Breakeven: 26 months
- Total interest saved (full term): $42,000
- 5-year scenario: net positive by $4,500
- Bottom line: yes, this looks worth pursuing.
Now here’s where the AI Auntie pauses and reads carefully — because the AI is a calculator, not a counselor.
The breakeven number is the one that matters most. That’s how many months it takes for your monthly savings to pay back the closing costs. If your breakeven is 26 months and you plan to stay in the house for 10+ years, that’s a green light to keep investigating. If your breakeven is 47 months and you might sell in 3 years, the math says don’t bother.
The five-year scenario is the safety check. Even if you say you’ll stay 10 years, life happens. Lupus flares, divorces, job changes, parents who need help, kids who need a different school district. The five-year number tells you whether you’d still come out ahead if life forced an early move.
The total interest saved over the full term is the dream number. It’s also the most fragile, because it assumes you stay the full new term and never refinance again. Treat it as a “best case” not a “definitely.”
When the Math Says No (and That’s Fine)
Here’s what surprises people. A refi can lower your rate and still not make sense.
- If your closing costs are $9,000 and your monthly savings are $120, your breakeven is 75 months. Six and a quarter years. If you might sell in five, that’s a no.
- If you’re 22 years into a 30-year loan, restarting the clock to 30 years even at a lower rate often costs you more total interest. The AI will catch this when you ask it to compare full-term interest costs.
- If you’ve got an FHA loan with mortgage insurance and you’re not refinancing into a conventional loan that drops the MI, you’re still paying that monthly fee no matter what.
The AI Auntie’s job is to help you see no clearly so you don’t waste energy on phone calls and applications that won’t move your life. A clear no is just as valuable as a clear yes.
What to Do With a Yes
If the math says yes, here’s the order of operations.
Step 1: Pull your credit reports. Free at AnnualCreditReport.com. The rate you actually qualify for is tied to your score. Walking in blind costs you.
Step 2: Get three quotes minimum. Big bank, credit union, online lender. Each quote should be within a 14-day window so it counts as one inquiry on your credit report. Compare APR (not just interest rate — APR includes fees).
Step 3: Re-run the AI math with your actual quoted numbers. The first calculation was a back-of-envelope. The real quotes will have real closing costs. Update the prompt and run it again.
Step 4: Decide. Take the math to a licensed mortgage professional if you want a second set of eyes. Your AI Auntie is licensed in real estate, not lending — education is my lane, the transaction is theirs.
The Bigger Lesson
This is the AI Auntie philosophy applied to one specific thing: AI is for the math, the drafts, and the questions. Licensed professionals are for the decisions, the products, and the signatures.
Refinancing is a five-figure decision. It deserves five minutes of math before you spend five hours on phone calls. AI takes that five-minute math from “I’ll get to it eventually” to “I did it during a commercial break.”
Save this guide. Bookmark it. Run the numbers yourself. And if the math works, get your three quotes and make somebody earn the deal.
You don’t have to be a finance expert to advocate for yourself. You just have to know which questions to ask. That’s the AI Auntie’s whole thing.
What to Hold in Your Head
Three things, that’s it.
The five numbers you need: balance, current rate, current P&I, years remaining, new rate.
The one number that decides it: breakeven months. If it’s shorter than how long you’ll stay, you’re in. If it’s longer, you’re out.
AI is for the math check. Licensed lenders are for the actual loan. Don’t confuse the two and don’t let anybody charge you a fee for the math.
Save This Post
Pin this one. Send it to the friend whose closing date was in 2023. Save it for the day rates drop another quarter point and your inbox starts asking again.
The AI Auntie newsletter goes out Sunday with a printable version of this post and the exact ChatGPT prompt copy-paste-ready. Subscribe at lohnniegreen.com.
Love, The AI Auntie
This post is education, not legal, financial, or mortgage advice. Lohnnie Green holds an active South Carolina real estate license but is not currently affiliated with a brokerage and does not represent buyers or sellers in transactions. All loan applications should go through a licensed lender or mortgage broker. Numbers in this post are illustrative; your actual figures will vary based on your individual loan terms, credit profile, and lender quotes.
Last updated: April 26, 2026. Mortgage rate references current as of this date.
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