Commercial real estate (CRE) underwriting becomes significantly more important when interest rates are high. Higher borrowing costs can reduce cash flow, compress leveraged returns, increase refinancing risk, and put downward pressure on property valuations. For investors, lenders, and asset managers, relying on historical performance or aggressive growth assumptions is no longer enough.

A disciplined approach to lease underwriting rising interest rates CRE requires closer attention to tenant quality, lease structures, debt costs, operating expenses, exit assumptions, and downside scenarios. Underwriters must determine whether a property can continue generating sufficient cash flow when financing becomes more expensive and market conditions remain uncertain.

For CRE professionals evaluating acquisitions or refinancing opportunities, the objective is not simply to determine whether a deal works today. It is to understand how resilient the investment remains when interest rates, occupancy, rents, and exit values move against the original assumptions.

Why Interest Rates Matter in CRE Underwriting

Interest rates directly influence the cost of debt and indirectly affect property valuations. When financing becomes more expensive, the same property may produce lower leveraged returns even if its operating performance remains unchanged.

Higher rates can also affect capitalization rates. If investors require greater returns because the cost of capital has increased, cap rates may expand, which can reduce the value of an asset. This creates an important relationship between NOI, financing costs, valuation, and investor returns.

Gallagher & Mohan has previously highlighted that rising rates require CRE investors to revisit assumptions around rent growth, exit cap rates, financing costs, and debt structures.

Current lending conditions also demonstrate why leverage assumptions deserve careful scrutiny. CBRE reported that average commercial LTV ratios were 59.6% in Q2 2026, while the average DSCR was 1.43 and debt yield was 10.2%.

1. Start With a Detailed Property-Level Analysis

The first step in underwriting a CRE deal is understanding the property's existing financial performance. Review the trailing 12-month income statement, rent roll, operating expenses, occupancy, tenant concentration, and historical cash flow.

Rather than accepting broker-provided projections at face value, compare historical results with current market conditions. Examine whether revenue growth is supported by actual lease terms, market rents, occupancy trends, and tenant demand.

A detailed T12 analysis can reveal whether projected NOI is realistic or dependent on temporary improvements. Gallagher & Mohan's underwriting teams conduct T12, T6, and T3 analyses as part of their financial modeling and underwriting capabilities.

2. Reassess Lease Assumptions When Rates Rise

Lease underwriting becomes especially important in a high-interest-rate environment because the quality and durability of rental income directly affect debt service coverage and valuation.

Underwriters should examine lease expirations, renewal probability, rent escalations, free-rent periods, tenant improvement obligations, leasing commissions, and upcoming rollover exposure. A property with long-term leases and financially strong tenants may have more predictable cash flows than an asset facing substantial near-term lease expirations.

This is where lease underwriting rising interest rates CRE becomes a critical consideration. Underwriters should evaluate not only contractual rent but also the likelihood of achieving projected renewal rents and the costs required to retain tenants.

Tenant credit analysis is equally important. Gallagher & Mohan evaluates tenant financial statements, payment history, credit factors, coverage metrics, and industry-specific risks as part of its tenant credit analysis services.

For deeper operational support, companies can also explore Gallagher & Mohan's Commercial Lease Services for lease compliance, abstraction, administration, and audit support.

3. Underwrite Debt Using Conservative Assumptions

Debt assumptions can make or break a CRE investment model.

When rates are elevated, underwriters should avoid assuming that inexpensive financing will automatically be available at acquisition, refinancing, or maturity. Instead, evaluate the proposed loan using realistic interest rates, amortization schedules, loan terms, financing fees, and potential rate caps.

Key metrics to monitor include:

• Loan-to-value (LTV)
• Debt service coverage ratio (DSCR)
• Debt yield
• Interest coverage
• Loan constant
• Fixed versus floating interest rate exposure
• Refinancing requirements

The analysis should also consider what happens if the property must refinance at a higher rate than initially expected. A deal that works only under favorable refinancing assumptions may have substantially more risk than its initial returns suggest.

4. Stress-Test NOI and Occupancy

A high-rate environment calls for more than a single base-case forecast.

Build multiple scenarios around the variables that have the greatest impact on cash flow. For example, an underwriting model can test lower rent growth, higher vacancy, increased operating expenses, higher interest rates, and a higher exit cap rate.

The goal is to identify the point at which the investment's cash flow or debt coverage becomes constrained.

Gallagher & Mohan specifically includes stress-test scenarios among its financial analysis and modeling capabilities.

A useful sensitivity framework might include:

• Base Case: Expected rent growth and current operating assumptions.
• Downside Case: Lower occupancy, slower rent growth, and higher expenses.
• Interest Rate Stress Case: Higher debt costs combined with conservative refinancing assumptions.
• Severe Downside Case: Lower NOI, higher vacancy, increased financing costs, and a higher exit cap rate.

Stress testing helps investors understand not just projected returns but the property's financial resilience.

5. Revisit the Exit Cap Rate

Exit assumptions can materially influence IRR and equity multiple calculations. In a high-interest-rate environment, assuming an exit cap rate below the entry cap rate may create an overly optimistic valuation.

Underwriters should evaluate whether the projected exit cap rate adequately reflects potential changes in capital markets, property risk, interest rates, asset quality, and investor return expectations.

A conservative exit analysis should also consider the property's condition, lease rollover schedule, market rent position, tenant concentration, and expected capital expenditures at the end of the hold period.

The objective is to determine whether the investment still produces an acceptable outcome without relying heavily on cap-rate compression.

6. Analyze Refinancing and Maturity Risk

Refinancing risk is one of the most important considerations in today's CRE underwriting environment.

A property may perform well operationally but still face financial pressure when a loan matures. If the replacement loan carries a higher interest rate, requires additional equity, or supports a lower loan amount because of declining value, the sponsor may need to contribute significant additional capital.

Underwriters should therefore model the expected loan balance at maturity and estimate the property's ability to qualify for replacement financing.

This analysis should include projected NOI, debt yield, DSCR, LTV, valuation, and prevailing financing conditions. The question is not simply whether the property can service today's debt, but whether it can support the capital structure at refinancing.

7. Evaluate Operating Expenses and Capital Expenditures

Higher financing costs can receive most of the attention, but operating expenses can also materially affect CRE returns.

Underwriters should examine property taxes, insurance, repairs and maintenance, utilities, payroll, management fees, common-area expenses, and recurring capital expenditures. Inflation or changes in insurance costs can reduce NOI even when rental revenue is growing.

For leased properties, carefully distinguish between expenses that can be recovered from tenants and expenses that remain the landlord's responsibility.

Accurate lease data is therefore critical. Gallagher & Mohan's lease operations services include lease abstraction, critical-date tracking, CAM reconciliation review, rent escalation verification, and lease compliance monitoring.

8. Connect Underwriting With Asset Management

CRE underwriting should not end when an acquisition closes. The assumptions established during underwriting should become a framework for ongoing asset management.

Actual rent growth, occupancy, tenant rollover, operating expenses, capital expenditures, and debt costs should be compared regularly against the original underwriting model. Variances can identify emerging risks before they significantly affect investment performance.

Gallagher & Mohan's asset management services include portfolio valuations, debt yield reporting, interest expense analysis, free cash flow analysis, NOI tracking, occupancy monitoring, lease renewal analysis, and sell-versus-hold analysis.

This creates a continuous feedback loop between underwriting and asset management.

9. Use Data to Improve Underwriting Decisions

High-interest-rate markets leave less room for modeling errors. Accurate market data, comparable transactions, rent information, operating benchmarks, and property-level financials can make underwriting more reliable.

A scalable underwriting process should bring together property financials, rent rolls, lease data, market research, comparable properties, debt assumptions, and sensitivity analyses.

Gallagher & Mohan's Real Estate Financial Analysis Services support financial modeling, underwriting, market research, data analysis, and investment evaluation.

Its financial analysis division also supports rental and sales comparable research, market research, T12 analysis, DCF modeling, stress testing, lease audits, and full deal underwriting.

Conclusion

Underwriting CRE deals in a high-interest-rate environment requires a more disciplined approach to assumptions, financing, leases, cash flow, valuation, and risk.

The key is to move beyond headline returns and understand the durability of the property's cash flow under different market conditions. By stress-testing interest rates, occupancy, rent growth, expenses, exit cap rates, and refinancing scenarios, investors can develop a clearer view of potential risks and opportunities.

Effective lease underwriting rising interest rates CRE strategies also require accurate lease data and a detailed understanding of tenant credit, rollover exposure, contractual escalations, and leasing costs. Combining these insights with robust financial modeling creates a more comprehensive underwriting process.

For CRE firms that need additional capacity, Gallagher & Mohan provides specialized underwriting, financial analysis, lease analysis, market research, and asset management support to help teams evaluate deals efficiently and consistently.

If your team needs scalable CRE underwriting and financial analysis support, schedule a free strategy call with Gallagher & Mohan to discuss your requirements.