Definition
Underwritten NOI (Underwritten Net Operating Income) is a conservative, risk-adjusted projection of Net Operating Income (NOI) used to evaluate an acquisition or loan.
It reflects what the investor or lender believes the property can sustainably produce — not simply what is reported or projected.
Purpose
- Determine maximum purchase price
- Assess loan sizing and debt coverage
- Evaluate downside risk
- Protect capital through disciplined assumptions
Underwritten NOI vs. Other NOI Metrics
- In-Place NOI: Historical trailing performance (e.g., T-12).
- Pro Forma NOI: Forward-looking projection based on sponsor assumptions.
- Stabilized NOI: Expected steady-state income.
- Underwritten NOI: Risk-adjusted number used for decision-making.
Underwritten NOI is often lower than sponsor pro forma NOI because it incorporates conservative assumptions.
Common Underwriting Adjustments
Revenue Adjustments
- Applying higher vacancy rates than seller projections
- Discounting aggressive rent growth assumptions
- Excluding speculative income sources
- Normalizing concessions
Expense Adjustments
- Increasing property tax assumptions post-sale
- Benchmarking insurance to current market rates
- Normalizing maintenance and capital needs
- Including full management fees even for owner-operators
Example
Seller Pro Forma NOI: $1,000,000
- + Adjusted vacancy (more conservative): -$60,000
- + Higher insurance estimate: -$25,000
- + Full management fee normalization: -$40,000
Underwritten NOI = $875,000
Underwritten NOI and Pricing Discipline
Investors typically determine value using:
- Maximum Price = Underwritten NOI ÷ Required Return (Cap Rate)
If the market demands a 6.5% return:
- $875,000 ÷ 0.065 = $13,461,538
This becomes the investor’s pricing ceiling.
Why It Matters
- Protects against overpaying in competitive markets
- Creates margin of safety
- Aligns purchase price with risk tolerance
- Preserves long-term capital durability
Common Pitfalls
- Letting market pressure inflate underwriting assumptions
- Matching seller projections to “win the dealâ€
- Ignoring tax reassessment impact
- Underestimating insurance volatility
Investor Checklist
- Separate facts from projections.
- Underwrite to downside scenarios.
- Apply realistic expense ratios.
- Use conservative exit cap rates.
- Maintain a written, non-negotiable investment standard.