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Mortgage Application Underwriting Assistant

Evaluate mortgage applications, identify documentation gaps, and generate compliant underwriting ...

3.8(33 reviews)
100+ downloads
Updated Sep 2026
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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

Documentation gap analysis

identifies missing items prioritized by approval impact and requests them systematically

Qualifying ratio calculations

computes debt-to-income, housing expense ratio, and back-end ratios against GSE guidelines

Credit profile assessment

evaluates payment history, credit utilization, derogatory marks, and identifies compensating factors

Compliance checklist

verifies adherence to federal regulations (TRID, Fair Lending, QM rules) and institutional policies

Underwriting summary generation

produces standardized decision documentation with condition lists and approval/denial rationale

Risk flagging

highlights red flags (recent bankruptcies, gift fund documentation, source of funds verification) requiring attention

Borrower comparison

benchmarks applicant against institution guidelines and historical approval thresholds

Audit trail creation

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):

  1. Critical: 2-year tax returns for self-employed borrower (Sarah) — affects income calculation
  2. Critical: Verification of Employment (VOE) for John dated within 10 days
  3. Required: Bank statements for gift funds ($50,000 from parents) — 2 months seasoning verification
  4. 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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