Blanket Mortgage Portfolio Loan Calculator
Calculate blanket mortgage payment, partial release fees, and cross-collateralization for a real estate portfolio loan.
| Total portfolio value | — |
| Blanket loan | — |
| Annual debt service | — |
| Avg loan per property | — |
| Partial release fee/property | — |
| Cost to fully release all (e.g. sell all) | — |
Blanket mortgages finance multiple properties under one loan with cross-collateralization. Common for portfolio investors with 5-20 SFR or small multifamily. Simplifies financing but complicates partial sales and refinances.
How Blanket Loans Work
One loan secured by multiple properties. All properties cross-collateralize — default on one triggers default on all. Underwriting based on aggregate cashflow and LTV. Common at portfolio lenders (community banks, regional banks, non-QM specialists).
Partial Release Mechanics
To sell one property, lender executes a partial release of lien. Requires paydown equal to (or greater than) the property's pro-rata share of loan. Plus partial release fee ($1,000-$3,000 typical). Some loans block partial releases entirely.
Pros and Cons
Pro: one set of closing costs vs separate per-property loans, simpler servicing, aggregate cashflow approval. Con: cross-collateral risk, partial release friction, refinance must cover ALL properties simultaneously, harder to dispose of underperforming properties.
DSCR Across Portfolio
Lender underwrites blended DSCR across all properties. One vacancy in a 4-property blanket can be absorbed by other 3. But sustained weakness in any property can trigger default of entire blanket.
Last updated May 2026. Sources: Fannie Mae Investor Products.