Mortgage Application Underwriting Assistant
Evaluate mortgage applications, identify documentation gaps, and generate compliant underwriting ...
What You Can Do
You can submit complete or partial mortgage applications to Claude and receive structured underwriting analysis that identifies missing documentation, calculates qualifying ratios, evaluates credit profiles against your institution's standards, and flags compensating factors for borderline applicants. Claude synthesizes diverse financial data—income verification, credit reports, asset statements, employment history—and produces compliant underwriting summaries that document decision-making rationale and reduce approval timelines while maintaining regulatory compliance.
Features
identifies missing items prioritized by approval impact and requests them systematically
computes debt-to-income, housing expense ratio, and back-end ratios against GSE guidelines
evaluates payment history, credit utilization, derogatory marks, and identifies compensating factors
verifies adherence to federal regulations (TRID, Fair Lending, QM rules) and institutional policies
produces standardized decision documentation with condition lists and approval/denial rationale
highlights red flags (recent bankruptcies, gift fund documentation, source of funds verification) requiring attention
benchmarks applicant against institution guidelines and historical approval thresholds
documents all analysis steps and assumptions for regulatory review and quality control
Example Output
Example 1: Complete Application with Missing Documentation
Applicant: John & Sarah Martinez | Loan Amount: $425,000 | Property Type: Single-Family Primary Residence
Status: Documentation Incomplete — Conditional Approval Pending
Qualifying Ratios:
- Front-end (Housing): 27.3% ✓ (guideline: 28%)
- Back-end (Total Debt): 38.1% ⚠️ (guideline: 36% — marginal)
Missing Documentation (Priority Order):
- Critical: 2-year tax returns for self-employed borrower (Sarah) — affects income calculation
- Critical: Verification of Employment (VOE) for John dated within 10 days
- Required: Bank statements for gift funds ($50,000 from parents) — 2 months seasoning verification
- Required: Appraisal status and preliminary appraisal report
Credit Analysis:
- Beacon Score: 738 (Good) | Experian: 742 | Equifax: 735
- Payment History: Excellent (24+ months on-time)
- Derogatory Marks: 1 medical collection ($820) from 2021, disputed but unresolved
- Recent Inquiries: 2 hard inquiries (mortgage shopping) — acceptable
- Compensating Factor: Substantial liquid assets ($180K) mitigate back-end ratio concern
Compliance Review: ✓ TRID compliant | ✓ Fair lending check passed | ⚠️ Awaiting appraisal to confirm QM status
Recommendation: Request missing documentation. Upon receipt of tax returns and VOE, anticipate Conditional Approval with standard conditions.
Example 2: Borderline Application with Risk Flags
Applicant: Michael Chen | Loan Amount: $280,000 | Status: Underwriting
RED FLAGS IDENTIFIED:
- Chapter 7 Bankruptcy discharged 18 months ago
- Recent job change (3 months at current employer)
- Debt-to-Income: 42.5% (exceeds 43% QM threshold)
Compensating Factors Present:
- 25% down payment (strong equity position)
- Beacon score rebounded to 680 post-bankruptcy
- Current employer offers stability (10-year company, stable industry)
- 24 months perfect payment history since discharge
Decision: Refer to Senior Underwriter — Non-QM product recommended given DTI and bankruptcy recency. Compensating factors present but require supervisor approval.
What's Included
- SKILL.md: Complete mortgage underwriting instruction file with GSE guideline references and decision logic
- Application intake template: Structured form for organizing borrower financial data, employment, credit, and property information
- Documentation checklist: Standard item list (pay stubs, tax returns, bank statements, appraisal, title) with priority flags
- Qualifying ratio worksheet: Pre-formatted template for calculating front-end, back-end, and housing expense ratios with guideline comparisons
- Underwriting summary template: Standardized format for documenting analysis, conditions, and approval/denial decisions with audit trail fields
Who It's For
- Loan Officers — Streamline application processing and reduce underwriting turnaround time while ensuring compliance
- Mortgage Underwriters — Systematize application evaluation and improve consistency across high-volume pipelines
- Credit Analysts — Assess borrower creditworthiness and document decision-making for regulatory audits
- Mortgage Processors — Identify documentation gaps early and prioritize requests to accelerate closing
- Bank Compliance Officers — Verify adherence to federal regulations (TRID, QM, Fair Lending) and institutional policies
Best For
- New application intake and documentation review — Organize financial data and flag missing items immediately
- Qualifying ratio calculations — Compute front-end, back-end, and housing expense ratios against institutional guidelines
- Credit profile evaluation — Assess credit history, identify compensating factors, and document risk mitigation strategies
- Borderline application analysis — Structure evaluation of marginal applicants and justify approval/denial decisions
- Compliance documentation — Generate audit-ready summaries that prove regulatory adherence and fair lending practices
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