BOSTON REIA · FINANCING GUIDE
Commercial Real Estate Loans: Size Debt From Sustainable Income
Reconcile lender NOI, debt coverage, collateral value and the balloon repayment before comparing quotes.
Commercial financing for apartments, retail, office, industrial or mixed-use property depends on the property’s income and risk as well as sponsor capacity. The same purchase price can support very different loan amounts when leases, operating costs or interest assumptions change.
Prepare a property operating analysis and a financing analysis separately, then connect them. A lender’s maximum advance is a credit decision. Your acceptable purchase price also depends on capital work, leasing obligations, liquidity and the return required for taking the risk.
See the financing exampleUse the calculatorsBuild the financing analysis
Build lender NOI from source documents
Start with executed leases, amendments, rent collections and operating statements. Separate base rent, reimbursements, percentage rent and other income. Identify free rent, arrears, concessions, deposits and nonrecurring receipts. A broker’s stabilized projection is useful for a future case, but it is not the current operating history.
Normalize expenses with evidence. Determine whether management, repairs, taxes, insurance and owner responsibilities are fully included. Ask how the lender treats replacement reserves and capital items in its underwritten cash flow. Reconcile its figure with your own property budget line by line. Differences in the NOI definition can change both loan proceeds and covenant compliance.
Apply multiple loan-sizing tests
Calculate the value-based cap and the coverage-based cap separately. A debt-yield requirement may impose another ceiling: underwritten NOI divided by principal. Obtain the actual constraints for the proposed lender and asset rather than assuming that one advertised leverage limit determines the loan.
For coverage sizing, divide accepted NOI by required coverage to find permitted annual debt service. Convert that payment capacity into principal using the quoted rate and amortization. A higher rate or shorter amortization can reduce proceeds even if value is unchanged. If the lender changes its NOI adjustments during underwriting, update the contribution required from the borrower immediately.
Separate amortization from contractual maturity
A loan amortized over twenty-five years may mature after five years with a substantial balloon. Build the payment schedule and calculate the outstanding balance at maturity. Note rate resets and any interest-only period. A payment that fits today is not proof that a later lender will refinance the remaining principal.
Run the maturity loan through a lower-NOI, higher-rate and lower-value case. Include refinance costs and required reserves in the payoff comparison. If the property needs equity at maturity, identify a credible source and a decision deadline. Avoid treating eventual interest-rate improvement as the only repayment plan.
Price tenant rollover as a capital need
Review lease expirations, termination options, renewal rights and tenant concentration against the loan term. Estimate downtime, tenant improvements, leasing commissions and landlord work for the major expirations. A property with current coverage can still require large cash contributions before replacement rent begins.
Ask whether the lender requires leasing reserves, cash management or approval of new leases. Confirm conditions for releasing those reserves and whether rent may be trapped if coverage falls. Keep an independent leasing capital schedule instead of subtracting an arbitrary annual percentage from NOI and assuming all future obligations have been addressed.
Review property diligence and recourse
Identify environmental, physical-condition, insurance, title, survey and permitted-use diligence early. Match reports to lender requirements to avoid buying a report that cannot be relied upon for the proposed loan. Investigate major systems and near-term capital work independently of the appraisal’s valuation conclusion.
Have counsel explain guarantees, nonrecourse exceptions, reporting covenants and default provisions. A nonrecourse description does not eliminate every personal obligation. Examine transfer restrictions, subordinate financing limits and prepayment terms as well. Some structures can make an early sale or refinance expensive even when scheduled payments are affordable.
Manage the loan after funding
Create a covenant calendar containing financial reporting, tax returns, insurance renewals, rent rolls, reserve deposits and maturity milestones. Use the exact contractual calculation when testing coverage. Keep a bridge from management accounts to the lender’s required format so year-end reporting does not become a reconstruction exercise.
Start refinancing sufficiently before maturity to obtain reports, address property issues and negotiate alternatives. The necessary runway depends on the asset and process. Compare extension costs with a new loan’s closing and prepayment expenses. The best available financing may be the structure that preserves enough time and operating flexibility to execute the property plan.
Worked financing example: Coverage constrains a loan below its value limit
Hypothetical teaching assumptions only. These are not current rates, lender offers, approval standards or promised results. Figures are before income taxes unless stated and do not model every transaction cost.
| Item | Illustrative figure | Interpretation |
|---|---|---|
| Accepted NOI / required DSCR | $180,000 / 1.25 | Illustrative assumptions, not a program standard. |
| Permitted annual debt service | $144,000 | 180,000 ÷ 1.25. |
| Rate / amortization | 7% / 25 years | Monthly amortizing payments; excludes fees. |
| Coverage-sized principal | About $1.698 million | Payment capacity is $12,000 monthly. |
| Value / 70% LTV cap | $2.6 million / $1.82 million | Coverage, not the LTV cap, controls in this case. |
| Stress NOI / maximum debt service | $150,000 / $120,000 | At the same 1.25 coverage requirement, payment capacity falls 16.7%. |
At a 7% nominal rate with monthly payments over 300 months, $12,000 monthly supports approximately $1,697,843 of principal. The value limit alone would overstate proceeds by about $122,157. Additional debt-yield, sponsor or reserve constraints could lower the final amount further.
This example sizes an amortizing loan; it does not establish the balloon balance for a shorter contractual term. Run the actual maturity date separately and add all refinance costs when comparing future proceeds with payoff.
Calculators for this financing decision
Keep the same assumptions across tools. Check each tool’s definitions and reconcile omitted costs in your own worksheet. A calculation does not establish approval or program eligibility.
Prepare the financing file
Documents and decisions before commitment
- Executed leases, amendments, collections and normalized operating statements.
- Lender NOI reconciliation and all sizing constraints.
- Amortization schedule, rate resets and maturity balance.
- Lease-rollover capital plan and reserve release conditions.
- Condition, environmental, title, survey and insurance requirements.
- Guaranties, covenants, reporting calendar and refinancing decision dates.
Financing questions
Can a strong appraisal solve weak coverage?
Not necessarily. A coverage test can produce a smaller loan than the value test. Price, equity, income and debt structure must be evaluated together.
Why does a 25-year amortization have a five-year balloon?
Amortization sets the scheduled payment calculation; maturity sets when the remaining principal is due. They can be different periods. Obtain both in writing.
Is commercial DSCR the same as a residential rental-loan ratio?
Often it is not. Commercial underwriting generally analyzes property income after specified operating adjustments. A residential program may compare rent with a housing payment. Confirm the actual definitions.
Primary sources and program references
Official sources support the legal and program framework. The cash-flow examples, comparison workflows and operating judgments are Boston REIA educational analysis. Verify current requirements and obtain transaction-specific advice.
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