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What Is a Commercial Real Estate Loan and How Does It Work?

A commercial real estate loan finances business property or projects. Here is how underwriting, repayment terms, DSCR, LTV, debt yield, maturity risk, and SBA pathways work.
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A commercial real estate (CRE) loan is financing used to buy, refinance, improve, develop, construct, or otherwise operate commercial property. The lender underwrites two things at once: the borrower’s ability to repay and the property’s value and cash flow. The final loan may be secured by the real estate, backed by guarantees, and governed by covenants, reserves, and a maturity date that does not always match the payment amortization period.

That distinction matters. A building can produce enough income to support scheduled payments yet still leave a large balance due when the loan matures. Before signing, compare the purpose, equity requirement, rate structure, debt-service coverage, leverage, collateral, guarantees, fees, prepayment rules, and the amount that must be paid or refinanced at maturity.

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What a commercial real estate loan finances

CRE lending covers business and investment property rather than a personal residence. The same property type can receive different underwriting depending on its use, income, tenants, construction status, and the borrower’s plan.

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Acquisition

An acquisition loan funds the purchase of an office building, retail center, industrial facility, multifamily property, hotel, medical building, or other commercial asset. The lender examines the purchase price, independent valuation, existing leases, vacancy, operating expenses, tenant concentration, and the borrower’s equity contribution. Owner-occupied property, where the borrower’s business operates in the building, is analyzed differently from an investment property whose repayment depends primarily on rent.

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Refinance

A refinance replaces existing debt. It may lower or restructure payments, release equity, fund improvements, or address a loan approaching maturity. The lender will usually reassess current value and operating performance rather than rely solely on the original appraisal. A property that has lost tenants or income may not support the same loan amount even if the old debt was previously performing.

Improvement, renovation, and expansion

Borrowers can use CRE proceeds for eligible building improvements, expansions, or major renovations. The lender may require plans, bids, permits, a construction budget, contingency reserves, inspections, and staged draws. Improvements that increase income or preserve the property’s usefulness generally provide a clearer repayment case than purely cosmetic work.

Development and construction

Development and construction loans finance a project before it produces stabilized income. Underwriting therefore depends on feasibility, zoning and permits, contractor capability, cost estimates, contingencies, market demand, projected rents or sales, and the schedule for completion and lease-up. A construction facility can convert to permanent financing, but that conversion is not automatic; the loan documents determine the conditions.

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How the borrowing process works

  1. Define the transaction. Identify the property, purchase or project budget, intended use, requested amount, timing, expected income, and available equity. State whether the property will be owner-occupied, leased to tenants, or held for another permitted purpose.
  2. Select an appropriate channel. Commercial banks, savings associations, credit unions, private lenders, and government-backed channels may have different appetites. For an eligible U.S. small business, a 7(a) application goes through a participating lender. A 504 transaction is originated by a certified development company (CDC) working with a senior lender.
  3. Submit borrower and property information. Expect requests for financial statements, tax returns, debt schedules, organizational documents, ownership details, personal financial statements for guarantors, rent rolls, leases, operating statements, budgets, and the purchase contract or development plans.
  4. Complete property and project diligence. The lender may order an appraisal, environmental review, title and survey work, insurance verification, property-condition review, lease audits, and inspections. For construction, it may also review plans, permits, contractor contracts, draw procedures, and a feasibility study.
  5. Undergo underwriting. The lender evaluates global cash flow, creditworthiness, liquidity, net worth, equity, collateral, property income, market conditions, tenant and sponsor strength, and sensitivity to lower income or higher rates. Ratios such as DSCR, LTV, and debt yield are considered together rather than as isolated pass-fail numbers.
  6. Review the written terms. A term sheet or commitment should identify the amount, rate, maturity, amortization, fees, collateral, guarantees, recourse, covenants, reserves, conditions, and any balloon balance. Ask how each ratio is calculated and which income and expenses are included.
  7. Close and fund. After conditions are satisfied, the borrower signs the note, mortgage or deed of trust, security agreements, guarantees, and other closing documents. Funds may be delivered at closing or in draws tied to construction progress.
  8. Service the debt and plan for maturity. Make payments, maintain insurance and taxes, provide required financial reporting, and monitor covenant compliance. Start planning for payoff, sale, renewal, or refinance well before the maturity date; a lender is not required to renew a loan simply because payments have been made on time.

What lenders evaluate

Borrower and guarantor capacity

Underwriters may review personal and business credit histories, liquidity, net worth, contingent liabilities, existing debt, tax returns, experience with similar properties, and the borrower’s total or “global” cash flow. A guarantee can provide additional repayment support, but its scope and enforceability are contract-specific. Read whether it is limited, full, springing, or tied to particular obligations.

Property income and operating performance

For an income-producing property, the lender analyzes effective gross income, vacancy and collection loss, operating expenses, replacement reserves, tenant concentration, lease expirations, and the stability of the net operating income (NOI). NOI generally means property operating income after operating expenses and before debt service and certain ownership-level costs. Accounting conventions differ, so confirm which items the lender includes.

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Value and collateral

An appraisal supports the lender’s estimate of value, but the appraised figure is not a promise that the property will sell for that amount. Title, survey, environmental condition, insurance, zoning, and property condition affect collateral quality. Personal or business assets may also secure the loan, particularly when property value or cash flow alone is insufficient.

Market and project risk

Vacancy, local supply, tenant credit, interest-rate changes, operating-cost inflation, environmental liabilities, construction delays, cost overruns, and a weak exit market can all reduce repayment capacity. Lenders may test how the transaction performs if income falls, expenses rise, rates reset, or lease-up takes longer than planned.

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The Comptroller’s Handbook: Commercial Real Estate Lending, issued by the Office of the Comptroller of the Currency (OCC) in March 2022, describes risk-based underwriting factors for national banks and federal savings associations. It is supervisory guidance, not a universal term sheet or a single approval rule for every lender.

Three ratios that describe different risks

No single ratio determines approval. The definitions and thresholds vary by lender, asset, market, and structure, so request the calculation in writing.

Measure Formula What it indicates Important limitation
Debt-service coverage ratio (DSCR) NOI ÷ annual debt service Cash flow available for scheduled principal and interest relative to required debt payments. A higher result generally provides more payment cushion, but acceptable levels depend on cash-flow stability and loan design.
Loan-to-value (LTV) Loan amount ÷ lender-used property value Leverage against the collateral. The value basis, appraisal date, and risk tolerance matter; prudent leverage differs by property and transaction.
Debt yield NOI ÷ loan amount Property income relative to the loan balance, without directly depending on the interest rate, amortization, or capitalization rate. It must be considered alongside DSCR, LTV, property quality, and other underwriting factors.

Illustrative arithmetic, not a market benchmark

Suppose a hypothetical property has $240,000 of lender-defined NOI, $180,000 of annual debt service, and a $2 million loan. Its DSCR would be 1.33 ($240,000 ÷ $180,000), and its debt yield would be 12% ($240,000 ÷ $2,000,000). If the lender’s value is $3 million, LTV would be 66.7% ($2,000,000 ÷ $3,000,000). Those calculations explain the measures; they do not establish approval cutoffs or typical market terms.

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Rate, amortization, maturity, and repayment mechanics

Fixed and variable rates

A fixed-rate loan keeps the contractual interest rate unchanged for the stated fixed period or term. A variable-rate loan can reset according to its index, spread, floor, cap, and reset schedule. When the rate changes, the payment may change, the amortization may extend, or a balloon balance may grow, depending on the note. Obtain the exact index, margin, adjustment dates, caps, and fallback language.

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Amortization is not maturity

Amortization is the schedule used to calculate periodic principal and interest payments. Maturity is the date the outstanding debt becomes due under the contract. For example, a loan can calculate payments over a 25-year amortization schedule but mature in five years. After five years, the borrower may still owe a substantial principal balance. That balance must be paid from cash, a sale, a refinance, or a renewal that the lender agrees to provide.

Balloon and refinance exposure

A balloon payment creates concentration risk at maturity. Property values, rates, occupancy, and lender standards may be less favorable than when the loan closed. Model the expected balance at maturity and identify a fallback if refinancing is unavailable. Do not assume that a history of timely payments guarantees a new loan.

Other contract terms

  • Recourse and guarantees: Determine whether repayment is limited to the property or extends to the borrower and guarantors, and note exceptions for fraud, waste, environmental damage, or other “bad acts.”
  • Covenants: Reporting requirements, minimum coverage, liquidity tests, limits on additional debt, leasing, transfers, and distributions can affect operations.
  • Reserves and escrows: Tax, insurance, replacement, capital-improvement, interest, or construction reserves may be funded at closing or replenished over time.
  • Prepayment: Yield-maintenance charges, defeasance, lockouts, step-down penalties, or notice requirements can affect a sale or refinance.
  • Fees and closing costs: Budget for origination, underwriting, legal, appraisal, environmental, inspection, title, recording, servicing, and—where applicable—SBA or CDC charges.

SBA financing routes for eligible U.S. small businesses

SBA programs are not generic commercial mortgages and do not apply to every borrower or property. Confirm the rules in effect when you apply.

SBA 7(a)

The U.S. Small Business Administration states that 7(a) loans can finance the acquisition, refinance, or improvement of real estate and buildings, along with other eligible business purposes. The stated maximum loan amount is $5 million. An eligible applicant generally operates a for-profit business in the United States, meets SBA size standards, is not an ineligible business, is creditworthy, and demonstrates reasonable repayment ability.

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You apply through a participating lender rather than directly to the SBA. Most 7(a) term loans use monthly principal-and-interest payments. Fixed-rate payments remain the same, while variable-rate payments may change when the rate changes. Because 7(a) can combine real estate with other permitted business uses, it may suit a broader project than a real-estate-only facility, subject to program rules and lender underwriting.

SBA 504

The SBA describes 504 as long-term, fixed-rate financing for major fixed assets, including purchasing, constructing, or renovating buildings or land. A CDC originates the 504 loan in collaboration with a senior lender. The stated maximum is $5.5 million, with 10-, 20-, and 25-year maturity terms.

504 proceeds cannot be used for working capital, inventory, or speculation or investment in rental real estate. The program is aimed at eligible operating small businesses and requires coordination among the borrower, CDC, and senior lender. Contact a CDC to determine whether the property, occupancy, borrower, and project satisfy current requirements.

Feature SBA 7(a) SBA 504
Real-estate use Can acquire, refinance, or improve real estate and buildings, plus other eligible business purposes. Focused on major fixed assets such as buildings and land purchase, construction, or renovation.
Stated maximum $5 million. $5.5 million.
Application channel Participating lender; SBA does not lend directly to the borrower. CDC works with a senior lender.
Rate and term information stated by SBA Fixed or variable rates; most term loans use monthly principal-and-interest payments. Long-term fixed-rate financing with 10-, 20-, or 25-year maturities.
Key exclusion or boundary Eligibility, size, credit, repayment, and business-purpose rules apply. No working capital, inventory, or speculation or investment in rental real estate.

SBA procedures can change. The SBA’s SOP 50-10 page identifies version 8.1 technical updates effective October 1, 2026, so verify current eligibility and documentation with the participating lender or CDC.

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How to compare commercial loan offers

Request competing proposals on identical assumptions: same loan amount, value, projected NOI, rate basis, amortization, and maturity. Then compare the items below rather than focusing only on the advertised rate.

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Comparison point Questions to ask
Purpose and eligibility Is the property owner-occupied, income-producing, under construction, or intended for another use? Does the program permit it?
Leverage and equity What loan amount, value basis, and borrower equity are assumed? Are reserves separate from equity?
Rate Is it fixed or variable? What are the index, spread, caps, floors, reset dates, and default-rate provisions?
Amortization and maturity What is the payment schedule, maturity date, and projected balloon balance?
Coverage tests How are NOI, DSCR, LTV, and debt yield calculated, and when are they tested?
Collateral and recourse Which assets secure the loan? Are guarantees full, limited, or conditional?
Covenants and reserves What reporting, liquidity, leasing, distribution, repair, tax, insurance, and replacement-reserve obligations apply?
Prepayment and costs Are there lockouts, defeasance, yield maintenance, step-down penalties, appraisal and environmental charges, legal fees, or SBA/CDC fees?

Documents to prepare

  • Recent personal and business tax returns and financial statements.
  • Current balance sheets, income statements, debt schedules, bank or brokerage statements, and evidence of available equity.
  • Entity formation documents, ownership chart, authorizing resolutions, and identification for principals and guarantors.
  • Purchase contract, current leases, rent roll, operating statements, property-tax records, insurance information, and service contracts.
  • Appraisal, environmental reports, surveys, title materials, property-condition reports, and zoning or permitting evidence when available.
  • For development or construction: plans, specifications, budget, contractor qualifications, bids, schedule, feasibility analysis, draw procedures, and contingency assumptions.
  • A written explanation of unusual liabilities, vacancies, litigation, credit events, or changes in income.

Common problems and ways to reduce them

Confusing a payment with full repayment

A low initial payment can hide a short maturity or variable-rate reset. Read the amortization schedule and calculate the balance due on the exact maturity date.

Using optimistic income

Underwriters may normalize vacancy, concessions, repairs, management costs, and replacement reserves. Build your own downside case instead of relying only on a broker’s projection.

Ignoring property condition or environmental issues

Deferred maintenance, contamination, flood exposure, or inadequate insurance can delay closing or require expensive remediation. Order diligence early enough to renegotiate or exit if necessary.

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Underestimating construction risk

Cost overruns and delays can consume contingency funds and postpone income. Confirm who funds overruns, how draws are inspected, and whether interest reserves cover a delayed completion.

Assuming SBA programs are interchangeable

7(a) and 504 have different purposes, channels, limits, and exclusions. A participating lender or CDC should confirm eligibility before you structure the purchase around a program.

Bottom line for a prospective borrower

A commercial real estate loan works when the borrower, property, and repayment plan withstand the lender’s analysis. Evaluate the property’s sustainable NOI, the borrower’s complete financial position, the collateral and guarantees, and the exact cash required at closing and maturity. Compare written offers using the same assumptions, stress-test vacancy and interest-rate changes, and obtain professional legal, tax, appraisal, and environmental advice for the transaction’s specific facts.

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