mortctl

Mortgage underwriting calculations and eligibility. Part of the LendCtl Suite.

Features

• LTV Calculation — LTV, CLTV, HCLTV with PMI estimates
• Program Eligibility — Conventional, FHA, VA, USDA, Jumbo
• Payment Breakdown — Full PITI calculation
• Loan Limits — 2026 conforming limits by county
• PMI Estimation — Based on LTV and credit score

Installation

npm install -g mortctl

Or use directly with npx:

npx mortctl --help

Quick Start

Calculate LTV

mortctl ltv --property-value 400000 --down-payment 80000

Output:

═══════════════════════════════════════════════════════════════
LTV CALCULATION
═══════════════════════════════════════════════════════════════

Property Value:     $400,000
Loan Amount:        $320,000
Down Payment:       $80,000 (20.0%)

LTV RATIOS
───────────────────────────────────────────────────────────────
LTV:                80.00%

PMI:                Not required (LTV ≤ 80%)
═══════════════════════════════════════════════════════════════

Check Program Eligibility

mortctl eligible \
  --property-value 400000 \
  --loan-amount 380000 \
  --credit-score 720

Output:

═══════════════════════════════════════════════════════════════
LOAN PROGRAM ELIGIBILITY
═══════════════════════════════════════════════════════════════

Property Value:     $400,000
Loan Amount:        $380,000
LTV:                95.0%
Credit Score:       720

PROGRAM ELIGIBILITY
───────────────────────────────────────────────────────────────
✓ CONVENTIONAL    
    Min down: $12,000
    ⚠ LTV >95% requires additional eligibility criteria

✓ FHA             
    Min down: $14,000

✗ VA              
    ✗ VA loans require veteran/military eligibility

✗ USDA            
    ✗ USDA loans require rural/eligible suburban location

✗ JUMBO           
    ✗ Loan amount is within conforming limits - use conventional

───────────────────────────────────────────────────────────────
💡 RECOMMENDED: FHA
═══════════════════════════════════════════════════════════════

Calculate Monthly Payment

mortctl payment \
  --loan-amount 320000 \
  --rate 6.5 \
  --property-value 400000

Show Loan Limits

# Baseline limits
mortctl limits

# Specific county
mortctl limits --county "Los Angeles" --state CA

# List all high-cost counties
mortctl limits --list-high-cost

Commands

mortctl ltv

Calculate loan-to-value ratios with PMI estimates.

Options:

• --property-value <amount> - Property value (required)
• --loan-amount <amount> - Loan amount
• --down-payment <amount> - Down payment (alternative to loan-amount)
• --second-lien <amount> - Second mortgage amount
• --heloc <amount> - HELOC amount
• --credit-score <score> - Credit score for PMI estimate

mortctl eligible

Check eligibility for all loan programs.

Options:

• --property-value <amount> - Property value (required)
• --loan-amount <amount> - Loan amount (required)
• --credit-score <score> - Credit score (required)
• --property-type <type> - single-family, condo, etc.
• --occupancy <type> - primary, second-home, investment
• --veteran - Veteran/military eligibility
• --rural - Rural/USDA eligible location

mortctl payment

Calculate monthly payment with full PITI breakdown.

Options:

• --loan-amount <amount> - Loan amount (required)
• --rate <percent> - Interest rate (required)
• --term <years> - Loan term (default: 30)
• --property-value <amount> - For tax/insurance estimates
• --taxes <amount> - Annual property taxes
• --insurance <amount> - Annual homeowners insurance
• --hoa <amount> - Monthly HOA dues

mortctl limits

Show conforming loan limits.

Options:

• --county <name> - County name
• --state <abbr> - State abbreviation
• --units <n> - Number of units (1-4)
• --list-high-cost - List all high-cost counties

Programmatic Usage

import { 
  calculateLtv, 
  calculatePmi, 
  calculatePaymentBreakdown,
  checkAllEligibility,
  findBestProgram,
  getConformingLimit 
} from 'mortctl';

// Calculate LTV
const ltv = calculateLtv(400000, 320000);
console.log(`LTV: ${ltv.ltv}%, PMI required: ${ltv.pmiRequired}`);

// Calculate PMI
const pmi = calculatePmi({ ltv: 95, creditScore: 720, loanAmount: 380000 });
console.log(`Monthly PMI: $${pmi.monthlyAmount}`);

// Check eligibility
const eligibility = checkAllEligibility({
  propertyValue: 400000,
  loanAmount: 380000,
  creditScore: 720,
  // ... other scenario options
});
const recommended = findBestProgram(eligibility);
console.log(`Recommended program: ${recommended}`);

// Get loan limits
const limit = getConformingLimit('Los Angeles, CA', 1);
console.log(`Conforming limit: $${limit}`);

2026 Loan Limits

Type	Limit
Conforming (baseline)	$766,550
High-cost ceiling	$1,149,825
FHA floor	$498,257
FHA ceiling	$1,149,825

Multi-unit multipliers:

• 2-unit: 1.28x baseline
• 3-unit: 1.55x baseline
• 4-unit: 1.92x baseline

PMI Rate Factors

PMI rates vary by:

• LTV: Higher LTV = higher rate
• Credit Score: Higher score = lower rate
• Property Type: Single-family vs condo
• Occupancy: Primary vs investment

Typical range: 0.15% - 1.40% annually

Part of LendCtl Suite

mortctl works with other LendCtl tools:

# Full underwriting workflow
finctl analyze -f borrower.json | \
  creditctl analyze --stdin | \
  mortctl eligible --stdin

License

Apache-2.0 © Satyan Avatara