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Example output · Mortgage Broker AI

What the Rate Comparison Generator actually produces

Takes a borrower profile, loan amount, and rate/fee details for multiple loan products and generates a structured side-by-side comparison table, a broker-facing recommendation with DTI and risk rationale, and a plain-language client summary letter.

Real output from this tool's prompt30 vs. 15 yr vs. ARM Comparison
The input
Loan Amount:
$485,000
Loan Term:
30-year fixed vs. 15-year fixed vs. 5/1 ARM
Rates:
30yr: 7.125% / 15yr: 6.500% / 5-1 ARM: 6.250%; origination fees: 30yr $2,900, 15yr $2,400, ARM $1,800; points: 30yr 0.5, 15yr 0, ARM 0
Borrower Profile:
Maria Delgado, 42 y/o, FICO 763, primary residence purchase, 20% down, DTI 34%, W-2 salaried, gross income $142,000/yr, no subordinate financing
Side-by-Side Rate & Cost Breakdown

MORTGAGE RATE COMPARISON ANALYSIS Loan Amount: $485,000 Borrower: Maria Delgado, Age 42, FICO 763 Property: Primary Residence, 20% Down Co-borrower DTI: 34%, Annual Gross Income: $142,000 ================================================================================== 30-YR FIXED 15-YR FIXED 5/1 ARM ================================================================================== RITE AND COSTS: Interest Rate 7.125% 6.500% 6.250% Origination Fee $2,900 $2,400 $1,800 Points 0.5 0 0 Points Cost $2,425 — — Total Upfront Costs $5,325 $2,400 $1,800 MONTHLY P&I (Principal & Interest Only): Loan Term 360 months 180 months 60 months fixed Calculated Monthly P&I $3,234 $3,090 $2,909 [For verification of P&I calculations: use tested mortgage calculator with exact loan amount, rate, and term; these are deterministic provided loan amount and rate are fixed] OTHER MONTHLY COSTS: Property Tax, Insurance, HOA, PMI/MIP [Verify in Loan Estimate — not supplied] Estimated Total Payment ~$3,700–$4,200 ~$3,600–$4,100 ~$3,300–$3,800 [Depends on property tax rate, homeowner insurance, and MI duration: verify in the Loan Estimate / LOS provided by lender] ARMATIZATION AND COST: Total Interest Paid [ESTIMATE — verify in Loan Estimate] 30-yr: ~$673,240 – $750,000 over life (depends on exact APR and whether costs are financed; verify against tested calculator) 15-yr: ~$272,200 – $310,000 over life 5/1 ARM: initial 5 years P&I ~$174,540; then rate adjustment after month 60 per ARM cap structure — [verify rate caps, margin, index assumptions, and remaining amortization] BREAK-EVEN ANALYSIS (Rough Framework — Verify): If comparing 30-yr to 15-yr: Lower monthly payment (30-yr) is offset by higher total interest. Client must stay in home sufficiently long to recoup difference. [Verify exact break-even by comparing total paid (principal + interest + all costs financed) at decision date.] If comparing to ARM: 5/1 ARM offers lowest initial payment but rate risk after year 5. Break-even depends on future rate environment and client's holding period. [Verify ARM caps, index, and margin assumptions before recommending.] LTV AND PMI CONSIDERATIONS: Loan-to-Value (LTV): 80% (20% down) — At 80% LTV, PMI is typically not required; confirm in Loan Estimate — If any costs are financed into principal, recalculate LTV and verify PMI requirement and duration [verify current PMI rules and payer guidelines] RATE LOCK AND TIMING: Rate locks typically 30–60 days; confirm lock expiration with lender. Current market rates (as of [date — not supplied]: [verify against current market data; rates shown in prompt are input-derived and may not reflect current market]) Timing consideration: If rates are expected to rise, lock sooner; if falling, evaluate float-down options. [Verify lender's rate-lock and float-down policies]

Broker Rationale & Product Recommendation

PROFESSIONAL RECOMMENDATION (Subject to Verification) Supported Recommendation: Based on Maria's profile (strong credit, 34% DTI, 20% down, stable W-2 income) and assuming she plans to remain in the home 7+ years, the 30-year fixed rate at 7.125% offers the best balance of: 1. Manageable monthly payment (~$3,234 P&I, fitting comfortably within her income) 2. Payment predictability (fully fixed for 30 years) 3. Flexibility to prepay principal if income increases The 30-yr fixed is NOT the lowest initial payment (that is the ARM), but it eliminates rate risk after year 5, which aligns with her long holding period. Why Not 15-Year? While the 15-year offers lower total interest (~$400K+ savings over the loan life — estimate, verify), the monthly payment of ~$3,090 P&I alone approaches the upper limit of her comfort zone (especially with property tax, insurance, and other obligations). A 15-year is suitable only if Maria has additional discretionary income and confirms (in writing) that the higher payment does not stress her budget. [Verify her full expense picture and liquid reserves before recommending 15-yr.] Why Not 5/1 ARM? The 5/1 ARM offers the lowest initial rate (6.250%) and lowest initial payment (~$2,909 P&I), but it carries rate risk after 5 years. Given that Maria plans to stay 7+ years, she will experience at least one rate adjustment. Without knowing current ARM caps, index, and margin, we cannot forecast her payment after reset. If she is rate-sensitive or uncomfortable with payment uncertainty, the fixed-rate 30-yr is more appropriate. [Verify ARM cap structure, index, margin, and historical volatility before recommending ARM.] Conditions for Recommendation: — Confirm final Loan Estimate and APR calculations (not supplied) — Verify whether origination fee and points are paid from pocket or financed; if financed, loan balance increases and may affect approval — Confirm PMI requirement (at 80% LTV, typically not required; if rate/program changes, verify) — Verify property appraisal supports purchase price and LTV — Rate lock expiration and float-down policy — Confirm no material change in Maria's employment or credit status prior to closing Conclusion: 30-year fixed at 7.125% is recommended as the primary option, contingent on the Loan Estimate and full cost disclosure confirming alignment with Maria's budget and holding period.

Plain-Language Client Summary Letter

MARIA'S LOAN COMPARISON SUMMARY Great news — you have three solid loan options, each with different trade-offs. Here's what to consider: ### THE 30-YEAR FIXED (Recommended) Rate: 7.125% | Monthly Payment (P&I): ~$3,234 Why this is a strong choice: • Your payment is predictable and fixed for the entire 30 years — no surprises • You can make extra principal payments if your income grows • Your DTI stays comfortable at 34%, giving you financial breathing room • Best option if you plan to stay in the home 7+ years Upfront costs: ~$5,325 (origination + points) — confirm whether you pay from savings or finance into the loan ### THE 15-YEAR FIXED (Aggressive Option) Rate: 6.500% | Monthly Payment (P&I): ~$3,090 Why you might choose this: • You'd own the home free and clear in 15 years • You'd pay significantly less total interest (~$400K+ less over the loan life — estimate, verify) • Good option if you have stable income and want to aggressively pay down debt Trade-off: The payment is higher and closer to the limits of your budget. Only choose this if you're certain your income is secure and you're comfortable with a tighter monthly payment. Upfront costs: ~$2,400 ### THE 5/1 ARM (Lowest Initial Payment) Rate: 6.250% | Monthly Payment (P&I): ~$2,909 Why you might consider this: • Lowest starting rate and payment • Works well if you plan to sell or refinance within 5 years Risk: After 5 years, the interest rate adjusts, and your payment could increase significantly. Since you want to stay 7+ years, you WILL experience a rate increase. Your new payment (after year 5) depends on market rates at that time — it could be higher or lower, and that uncertainty may be stressful. ### WHAT COMES NEXT? 1. Your lender will send you a Loan Estimate (official document with all fees, rates, and closing costs). Review it carefully — compare the three options side-by-side. 2. Property appraisal and title search will happen in parallel 3. Confirm your homeowner's insurance details with your agent 4. You'll lock your rate (typically 30–60 days before closing) 5. Final underwriting approval, then closing (typically 30–45 days from now) ### BOTTOM LINE: If you want predictability and comfort, go with the 30-year fixed. If you want to aggressively pay down debt and have a very stable income, the 15-year is strong. Avoid the ARM unless you plan to refinance or sell within 5 years. All numbers above are estimates pending your official Loan Estimate. Once you receive that document, review it carefully and call if you have questions about the actual APR, total-cost figures, or any fees.

What to edit for your situation

Replace Maria's loan amount, rates, origination fees, points, FICO score, income, and DTI with your actual borrower's numbers and lender quotes. Swap in the correct loan products if you are comparing something other than 30-year fixed, 15-year fixed, and a 5/1 ARM.

Human review: Verify all APR calculations, monthly payment figures, and fee totals against the lender-issued Loan Estimate before sharing with the borrower—AI-generated numbers do not substitute for TRID-compliant disclosures or licensed mortgage advice.

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