AI Prompts for Mortgage Brokers: Pre-Approval, Underwriting, Client Communication

Published: July 2026 | 8 min read

Mortgage brokers navigate complex loan products, borrower qualifications, and lender requirements. AI can generate pre-qualification summaries, loan comparison tables, and client communications, but only when prompts define the loan type, borrower profile, lender guidelines, and regulatory constraints. Structured prompts turn AI into a loan officer assistant that never misses a condition.

Below are production-ready AI prompts, organized by workflow. These are adapted from Skillent's AI Prompt Library.

Pre-Qualification & Application

1. Borrower Pre-Qualification Summary

Role: Mortgage loan officer
Task: Create a pre-qualification summary for [borrower].
Borrower profile:
- Income: $[X]/year (W-2 / self-employed)
- Monthly debts: $[X]
- Credit score: [X] (mid-score if co-borrower)
- Down payment: $[X] (savings / gift / 401k)
- Assets: $[X] (reserves after closing)
- Employment: [X] years at current employer
Calculate:
1. Max DTI for [conventional/FHA/VA]: [X]%
2. Max monthly payment (PITI): $[X]
3. Max loan amount (at [X]% rate, [X]-year term): $[X]
4. Max purchase price (loan + down payment): $[X]
5. Cash to close (down payment + closing costs): $[X]
6. Reserve requirement: [X] months PITI = $[X]
Loan product recommendations:
1. Conventional: [qualify? rate? PMI?]
2. FHA: [qualify? rate? MIP?]
3. VA: [qualify? rate? funding fee?]
4. Jumbo: [if applicable]
Output: Pre-qualification summary ready for client discussion.

2. Loan Comparison Matrix

Role: Mortgage broker
Task: Compare [X] loan products for [borrower profile].
Borrower: [credit score, income, DTI, down payment %]
Products to compare:
1. Conventional 30-year fixed
2. Conventional 15-year fixed
3. FHA 30-year fixed
4. VA 30-year fixed (if eligible)
5. 5/1 ARM
For each product:
1. Interest rate ([X]%)
2. APR ([X]%)
3. Monthly P&I payment
4. Monthly MI/PMI (if applicable)
5. Total monthly PITI (estimated)
6. Total interest over life of loan
7. Cash to close (down payment + closing costs)
8. DTI ratio (front and back)
9. Reserves required
10. Pros and cons
Side-by-side comparison table
Recommendation: Which product fits this borrower best and why
Output: Loan comparison matrix ready for client presentation.

Underwriting Support

3. Loan Condition Checklist

Role: Mortgage loan processor
Task: Create a conditions checklist for [loan type] application.
Borrower: [name]
Loan type: [conventional/FHA/VA/jumbo]
Lender: [name]
Conditions to satisfy:
1. Borrower conditions:
   - Most recent pay stubs (30 days)
   - W-2s (2 years)
   - Tax returns (2 years, all schedules)
   - Bank statements (2 months, all accounts)
   - Asset verification (down payment source)
   - ID and SSN verification
   - Credit pull authorization
   - Employment verification (VOE — 10 days before closing)
2. Property conditions:
   - Purchase contract (executed)
   - Appraisal (ordered, received, reviewed)
   - Title commitment (all requirements met)
   - Survey (if required)
   - HOA documents (if applicable)
   - Pest inspection (if required)
   - Home inspection (if condition in contract)
3. Lender conditions:
   - Loan Estimate (LE) issued within 3 days of application
   - Intent to proceed received
   - Initial disclosure package signed
   - Lock confirmation
   - AUS approval (DU/LP)
4. Prior-to-close conditions:
   - Updated pay stub
   - Clear title
   - Insurance binder with paid receipt
   - Final inspection (if new construction)
   - Clear-to-close issued
For each: Received (Y/N), date, who's responsible, deadline
Output: Conditions tracking spreadsheet.

4. Underwriting Narrative Builder

Role: Mortgage underwriter assistant
Task: Draft an underwriting narrative for [loan file].
Loan: [borrower, loan type, amount, LTV, DTI, credit score]
AUS approval: [DU Approve/Eligible or LP Accept]
Narrative sections:
1. Loan overview (purpose, amount, LTV, product, term)
2. Borrower analysis:
   - Credit history (score, tradelines, recent inquiries, derogatory items)
   - Income analysis (type, stability, continuity, calculation)
   - Asset analysis (reserves, down payment source, large deposits)
   - Employment stability
3. Property analysis:
   - Type, occupancy, condition
   - Appraisal summary (value, condition, comparable support)
   - Any appraisal conditions (repairs, re-inspection)
4. Risk factors:
   - DTI above guidelines? (compensating factors?)
   - Credit blemishes? (explanation, recency)
   - Property issues? (condition, appraisal gaps)
5. Compensating factors (list any that offset risk)
6. Recommendation: Approve / Approve with conditions / Refer
Output: Underwriting narrative, 500-700 words, ready for senior underwriter review.

Client Communication

5. Pre-Approval Letter Generator

Role: Mortgage loan officer
Task: Write a pre-approval letter for [borrower].
Borrower: [name(s)]
Loan type: [conventional/FHA/VA]
Max loan amount: $[X]
Max purchase price: $[X]
Interest rate: [X]% (or "subject to market rate at time of application")
Down payment: $[X] ([X]%)
Conditions of pre-approval:
1. Subject to property appraisal at or above purchase price
2. Subject to no change in borrower's financial condition
3. Subject to final underwriting review
4. Valid for [X] days from issue date
5. Rate not locked — subject to market rates
Format: Professional letter on company letterhead
Output: Pre-approval letter ready for client to submit with offers.
Note: Include any property type exclusions (condos, manufactured, multi-family) if applicable.

6. Rate Lock Advisory Email

Role: Mortgage loan officer
Task: Write a rate lock recommendation email for [borrower].
Borrower: [name], loan type, amount
Current market rate: [X]%
Lock period options: [30/45/60] days
Lock cost: [X]% or no cost]
Rate trend: [rising/falling/stable — based on recent economic data]
Recommendation:
1. Lock now if: [what market conditions suggest locking]
2. Float if: [what market conditions suggest waiting]
3. Float-down option: [available? cost? terms?]
4. What to consider: [closing date, market volatility, economic calendar events]
Email includes:
1. Current rate and payment
2. Lock vs. float analysis
3. My recommendation with rationale
4. Rate lock expiration if they choose to lock
5. What they need to do to lock (sign lock agreement)
6. Deadline to decide
Output: Rate lock advisory email, 200-300 words.

7. Closing Disclosure Reviewer

Role: Mortgage loan officer
Task: Review this Closing Disclosure (CD) for accuracy.
CD: [paste key figures — loan amount, rate, term, monthly payment, closing costs, cash to close]
Compare to Loan Estimate (LE): [paste LE figures]
Check for discrepancies:
1. Loan amount: CD $[X] vs LE $[X] — match?
2. Interest rate: CD [X]% vs LE [X]% — match?
3. Monthly P&I: match?
4. Monthly MI: match?
5. Property taxes: CD $[X] vs LE $[X] — significant change?
6. Homeowner's insurance: match?
7. Closing costs: CD total $[X] vs LE total $[X] — variance?
8. Cash to close: CD $[X] vs LE $[X] — variance?
9. Any new fees not on LE?
10. Lender credits: match?
For each: Match / Minor variance (<10%) / Major variance (>10% — requires explanation)
Output: CD review summary with flagged items needing explanation or correction.

Compliance & Documentation

8. Loan Estimate Generator

Role: Mortgage loan originator
Task: Draft the Loan Estimate disclosure for [borrower].
Loan details:
- Borrower: [name], [address of subject property]
- Sale price: $[X] / Loan amount: $[X] / LTV: [X]%
- Product: [30-year fixed conventional / FHA / VA]
- Rate: [X]%
- Term: [X] months
Loan Estimate sections:
1. Loan terms (loan amount, rate, monthly P&I, prepayment penalty, balloon)
2. Projected payments (P&I, MI, escrow, total monthly)
3. Costs at closing (down payment, closing costs, prepaid, escrow, cash to close)
4. Loan cost breakdown (origination charges, services you cannot shop for, services you can shop for)
5. Other costs (taxes, insurance, prepaid interest, initial escrow)
6. Calculating cash to close
7. Summary of your transaction
8. Alternate loan options comparison
9. Other disclosures (APR, TIP, appraisal, liability after foreclosure)
Output: Draft Loan Estimate values ready for LOS input and disclosure delivery.
Note: Must be issued within 3 business days of loan application per TRID.

9. Compliance Documentation Checklist

Role: Mortgage compliance officer
Task: Create a compliance documentation checklist for [loan type] file.
Loan: [borrower, loan number, type, lender]
Regulatory requirements:
1. TRID (TILA-RESPA Integrated Disclosure):
   - Loan Estimate issued within 3 business days of application (date logged)
   - Intent to proceed received within 10 business days
   - Closing Disclosure issued at least 3 business days before consummation
   - CD acknowledgment received
2. ECOA (Equal Credit Opportunity Act):
   - No prohibited basis for denial (race, color, religion, national origin, sex, marital status, age)
   - Adverse action notice (if denied) within 30 days
3. HMDA (Home Mortgage Disclosure Act):
   - Data collected and reported (demographic, loan, property data)
4. Fair Credit Reporting Act:
   - Credit report permissible purpose documented
   - Adverse action notice references credit report (if credit-based denial)
5. HOEPA (Home Ownership Equity Protection Act):
   - High-cost loan test performed (if applicable)
6. RESPA:
   - Affiliated business arrangement disclosure (if applicable)
   - Servicing transfer disclosure
7. Fair Housing Act:
   - No discriminatory pricing or steering
8. State-specific requirements: [list any state-specific disclosures]
For each: Document present (Y/N), date, location in file
Output: Compliance audit checklist for loan file review.

Business Development

10. Realtor Partnership Pitch

Role: Mortgage broker business development
Task: Write a partnership pitch for [realtor/brokerage].
Target: [realtor name, brokerage, market area]
Your company: [name, NMLS, key differentiators]
Pitch structure:
1. Introduction (who you are, why I'm reaching out)
2. Why partner with me (3 specific benefits — speed of pre-approval, communication, product range)
3. What makes me different (your unique value — same-day pre-approvals, weekend availability, etc.)
4. Results proof (average close time, approval rate, client testimonials)
5. How we work together (communication style, co-marketing, open house support)
6. What I need from you (referrals — how to introduce me to clients)
7. Next steps (coffee meeting, shadow a closing, co-host an open house)
Format: Email pitch + leave-behind one-pager
Output: Partnership email + one-page value prop summary.

11. Monthly Pipeline Report

Role: Mortgage branch manager
Task: Create a monthly pipeline report for [month/year].
Pipeline summary:
- Applications received: [X]
- Pre-approvals issued: [X]
- Loans in processing: [X]
- Loans in underwriting: [X]
- Conditional approvals: [X]
- Clear to close: [X]
- Funded loans: [X] (volume $[X])
- Withdrawn/denied: [X]
Conversion rates:
- Application → pre-approval: [X]%
- Pre-approval → closed: [X]%
- Average days to close: [X]
- Average loan amount: $[X]
- Average credit score: [X]
Product mix:
- Conventional: [X]%
- FHA: [X]%
- VA: [X]%
- Refinance: [X]%
Analysis:
1. Pipeline health (growing/stable/shrinking)
2. Bottleneck stage (where are loans getting stuck?)
3. Turn time trends (improving or degrading?)
4. Top 3 referring agents (and their volume)
5. Goals for next month
Output: Pipeline dashboard with narrative analysis.

12. Refinance Analysis

Role: Mortgage loan officer
Task: Create a refinance analysis for [borrower].
Current loan: [balance $X, rate X%, monthly P&I $X, remaining term X months]
Proposed loan: [new amount, new rate, new term, new monthly P&I, closing costs $X]
Analysis:
1. Monthly savings: $[X] (current P&I - new P&I)
2. Break-even point: closing costs / monthly savings = [X] months
3. Interest saved over [X]-year period: $[X]
4. Term change: extends/shortens loan by [X] months
5. Cash-out option: [if applicable — amount, new LTV, new payment]
6. Cost breakdown: appraisal, title, lender fees, escrow, prepaid
7. No-closing-cost option: [higher rate, how much? Still saves?]
8. Net benefit: [is this refinance worth it?]
Scenarios:
- Best case: rates drop further, should they wait?
- Worst case: rates rise, should they lock now?
Recommendation: Refinance / Wait / Not worth it (with rationale)
Output: Refinance analysis one-pager for client discussion.

Best Practices

1. Always define the role and context — professional prompts produce professional output

2. Specify output format — table, checklist, narrative, or structured document

3. Include industry-specific parameters — regulations, market conditions, jurisdiction

4. Set constraints — what to avoid, word limits, prohibited content

5. Always human-review — AI output is a first draft, not a final product.

Related: Check out our guides on AI prompts for real estate brokers and ChatGPT prompts for home inspectors.