Investment Property Reserve Requirements
Investment-property reserves are not one universal number. Agency requirements and private-investor matrices can increase reserves as portfolio complexity grows.
Agency reserves
Fannie Mae has minimum reserve requirements plus additional requirements tied to financed second homes and investment properties.
Portfolio effect
Multiple financed properties can create additional reserve requirements even after the subject transaction's minimum is met.
Eligible assets
What can count toward reserves follows applicable asset eligibility and documentation rules.
DSCR/private investor
Private-investor reserve requirements vary by credit, LTV, loan size, property type, number of properties and other risk layers.
Reserves have layers
Determine the subject property's minimum reserves and then additional requirements associated with multiple financed second homes/investment properties. Reserve assets must remain after funds needed to close.
Documents I would gather before calculating rental income
Current mortgage statements/PITIA for every retained property; Schedule E and applicable tax returns; leases; purchase closing statements and acquisition dates; appraisals or rent schedules when applicable; proof of current housing payments; insurance/HOA information; entity documents if an LLC is involved; and evidence of reserves. The correct calculation depends on what the property is and when/how it was acquired.
Common investor-loan mistakes
Calling 75% of rent 'income' without subtracting PITIA; using a lease when current agency policy requires another rent source; adding positive rental income when it is only allowed to offset housing expense; confusing cap rate with DSCR; applying a private investor's seasoning rule to Fannie/Freddie; and assuming an LLC-owned mortgage is counted the same as a personally obligated mortgage.
Primary sources to verify
- Fannie Mae — General Rental Income
- Fannie Mae — Investment Property Purchased Within 45 Days
- Fannie Mae — Multiple Financed Properties
- Freddie Mac — Investment Property Mortgages
Last reviewed September 15, 2026.
How I would underwrite the scenario step by step
1. Identify agency conventional versus private DSCR/portfolio financing. 2. Build a complete real-estate-owned schedule with ownership, mortgage obligation, PITIA, rent, acquisition date and entity vesting. 3. Determine the permitted rental documentation for each property. 4. Calculate each rental separately under the applicable rule. 5. Count financed properties and calculate required reserves. 6. Review property/project eligibility, LTV, credit and cash-out/seasoning. 7. Only then compare pricing and decide which loan structure best fits the investor's strategy.
This sequence prevents a strong-looking property from being qualified with the wrong income methodology. For investors with several rentals, one incorrectly treated property can change DTI, reserves, financed-property count or even product eligibility.