Blanket Mortgage Calculator
Calculate the combined monthly payment for a single mortgage covering 2-10 investment properties. Model release clause costs, compare to individual mortgages, analyze DSCR, and assess cross-default risk.
A blanket mortgage lets investors and developers finance multiple properties under a single loan — one application, one closing, one monthly payment.
Portfolio breakdown (3 properties, equal allocation):
| Property | Value | Loan Allocated | Monthly P&I | Release Price |
|---|---|---|---|---|
| Property 1 | $400,000 | $280,000 | $2,069 | $322,000 |
| Property 2 | $400,000 | $280,000 | $2,069 | $322,000 |
| Property 3 | $400,000 | $280,000 | $2,069 | $322,000 |
| Total | $1,200,000 | $840,000 | $6,208 | $966,000 |
Experienced real estate investors use blanket mortgages as an acquisition tool — then refinance into individual mortgages as equity builds.
Blanket-to-individual refinance strategy:
How to Use the Blanket Mortgage Calculator
This calculator analyzes single mortgages covering multiple investment properties — calculating combined payments, per-property allocations, release clause requirements, and portfolio risk for real estate investors and developers.
Quick Calculator
Enter the number of properties (2-10), total portfolio value, total loan amount, interest rate, and loan term. The calculator shows your combined monthly payment, portfolio LTV, per-property payment, and the release clause price required to sell an individual property from the blanket.
Advanced: How It Works, vs Individual Mortgages, Release Clause
The How It Works tab explains cross-collateralization, partial release clauses, and why blanket mortgages are unavailable from Fannie/Freddie — with a per-property breakdown table. The vs Individual Mortgages tab compares total closing costs, monthly payments, and lifetime interest. The Release Clause tab walks through the exact step-by-step process for selling one property out of a blanket.
Pro: Portfolio Strategy, Risk Analysis, Lender Sources
The Portfolio Strategy tab shows the blanket-to-individual refinance strategy experienced investors use to scale, with DSCR analysis. The Risk Analysis tab quantifies cross-default risk, vacancy concentration, and sale restrictions. The Lender Sources tab covers where to find blanket mortgages (community banks, credit unions, private lenders, DSCR programs) with specific terms and approaches.
How Blanket Mortgage Payments Are Calculated
Per-Property Payment = Combined Payment ÷ Number of Properties
Portfolio LTV = Total Loan ÷ Total Portfolio Value × 100
Release Price = (Total Loan ÷ Properties) × Release Clause %
Example: 3 properties worth $1,200,000 | Blanket loan: $840,000
Rate: 7.5% | Term: 25 years
Combined Payment = PMT(7.5%/12, 300, $840,000) = ~$6,198/mo
Per-Property = $6,198 ÷ 3 = $2,066/mo
Portfolio LTV = $840,000 ÷ $1,200,000 = 70%
Release Price (115%) = ($840,000÷3) × 115% = $322,000
The release clause price (typically 100-125% of the allocated loan amount per property) is the key number that determines whether selling an individual property is financially feasible from within a blanket structure.
Example: 3-Property Rental Portfolio in Texas
3 properties worth $1.2M total — blanket loan of $840,000 at 7.5% for 25 years
| Total Portfolio Value | $1,200,000 |
| Total Blanket Loan | $840,000 |
| Portfolio LTV | 70% |
| Rate / Term | 7.5% / 25 years |
| Combined Monthly Payment | $6,198 |
| Per-Property Payment (equal) | $2,066 |
| Gross Monthly Rent (portfolio) | $8,400 |
| Est. NOI (65% ratio) | $5,460/mo |
| DSCR | 0.88x (below 1.2x threshold!) |
| Blanket Closing Cost (2%) | $16,800 |
| Individual Closing (3% × 3) | $36,000 |
| Closing Savings | $19,200 |
| Release Price per Property (115%) | $322,000 |
This example shows a DSCR below the typical 1.20x lender requirement — indicating the portfolio generates insufficient cash flow to service the debt at these terms. The investor would need to either increase rents, reduce the loan amount, or extend the term to improve DSCR before a lender would approve this blanket structure.