Investor Second Mortgage Calculator

Second Mortgage Calculator — DSCR, FICO, DTI and CLTV in Real Time

Size a standalone Non-QM second lien on your rental property without touching your first mortgage. Enter your numbers and see the exact DSCR, FICO band, DTI and combined loan-to-value the guidelines allow — with zero origination fees and zero broker fees.

  • DSCR from 1.10x coverage
  • FICO tiers from 700
  • DTI capped at 50%
  • CLTV up to 75%
Run the numbers

Calculate your standalone second mortgage

Pick a qualifying track, set your FICO tier, then enter property value, first-lien balance and income. Results update instantly with your DSCR or DTI, maximum CLTV and interest-only payment.

Investment property (non-owner-occupied)
$600,000
$250,000

Current 1st lien CLTV: 42%

$480,000
50%

50% is standard for business accounts. Use 0% for personal accounts.

$1,200

Auto loans, credit cards, student loans, and your existing 1st mortgage payment.

Estimated standalone 2nd lien

$200,000

Max permissible CLTV

75%

Interest-only payment

$1,646/mo

Qualifying income

$20,000/mo

Debt-to-income

14%

Eligible for Desktop AVM (skip full appraisal)

Payment shown at a 9.875% placeholder rate. 5-Year Interest-Only Draw / 30-Year Maturity / 25-Year Amortization. 75% CLTV — Investor bank statement, 720+ FICO, loan ≤ $500k.

  • Automated valuation (AVM) available — no full appraisal required.

Loan sizes $50,000 – $1,000,000 · $0 origination & broker fees

Estimates only, based on the published guideline matrix and a placeholder interest-only rate. Final terms depend on FICO, CLTV, valuation, and index pricing. Not a commitment to lend. Proprietary qualification model — output is for your own scenario only and may not be reproduced or redistributed.

What each number means

DSCR

Gross rent divided by total housing expense. 1.10x minimum coverage on the rental track, with 720+ FICO required.

FICO tier

700 minimum on the 12-month bank statement track, 720 on DSCR. Your tier sets the maximum CLTV band.

DTI

Bank statement track only: qualifying deposits after the expense factor versus all monthly debt, capped at 50%.

CLTV

Up to 75% at 720+ and 70% at 700–719 through $500,000, and 65% from $500,001 to $1,000,000.

Second mortgage calculator questions

Numbers look right? Send the scenario over.

Apply for pre-approval

Want the structure explained first? See the second mortgage FAQ, the investment property HELOC guide or the Investor Academy.