# LTV DSCR and debt yield the three loan-sizing constraints

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Markdown: https://chicagocommercialfunding.com/guides/ltv-dscr-and-debt-yield-the-three-loan-sizing-constraints/index.md
Resource ID: ltv-dscr-and-debt-yield-the-three-loan-sizing-constraints
Published: 2026-10-21
Updated: 2026-10-21
Attribution: Chicago Commercial Funding Editorial
Topic: financing
Asset types: All commercial
Investment stage: Finance
Experience level: Intermediate

Maximum commercial loan proceeds are the smallest amount supported by value, debt-service coverage, debt yield, and the lender’s additional conditions.

A commercial property's maximum loan is often constrained by several tests at once. LTV limits debt relative to accepted collateral value. DSCR limits debt service relative to an accepted cash-flow measure. Debt yield compares accepted income with the loan balance. When a lender applies all three, the smallest supported loan generally controls before fees, reserves, holdbacks, and other requirements.

The ratios are not interchangeable. A higher appraisal can improve LTV without increasing debt-service capacity. A lower interest rate can improve DSCR sizing without changing debt yield. An interest-only period can make current payments easier while leaving the balloon balance unchanged.

## Define the numerator before applying ratios

The formulas are simple; agreeing on the inputs is harder. A lender may normalize revenue, vacancy, operating expenses, management costs, taxes, insurance, and reserves differently from the seller. Ask which cash-flow figure is used for each test.

For this hypothetical illustration, use accepted annual NOI of $360,000 and accepted value of $4,800,000. The assumed limits are 65% LTV, 1.30 times DSCR, and 9% minimum debt yield. These are example assumptions, not current market terms or a statement of any lender's requirements.

The OCC handbook discusses DSCR, debt yield, and LTV separately in its income-producing CRE underwriting section. That separation matters because the ratios respond to different risks. [OCC CRE lending handbook](https://www.occ.treas.gov/publications-and-resources/publications/comptrollers-handbook/files/commercial-real-estate-lending/pub-ch-commercial-real-estate.pdf)

For multifamily programs, be especially careful with reserve treatment. Fannie Mae's definition of NCF deducts underwritten replacement-reserve expense from NOI. A model using that measure should not silently substitute an NOI figure before the reserve. [Fannie Mae NCF definition](https://mfguide.fanniemae.com/fnmf-pdf/download/6626)

## Test one: loan to value

LTV equals loan principal divided by accepted value. Rearranging the equation gives maximum LTV-supported principal:

**Maximum loan = accepted value × maximum LTV.**

For the example, $4,800,000 multiplied by 65% equals $3,120,000. If the accepted value falls to $4,200,000, the same ratio supports $2,730,000, a reduction of $390,000.

Purchase price and accepted value are not always identical. A term sheet may specify the lesser of price and appraised value or apply its own eligible-cost restrictions. Read that basis. A buyer cannot assume that negotiating a high appraisal automatically produces cash-out acquisition financing.

LTV also says little about near-term leasing obligations. A property at 60% LTV could still require a large equity contribution when tenants leave. Collateral coverage and cash liquidity answer different questions.

## Test two: debt-service coverage

DSCR equals accepted annual cash flow divided by annual debt service. For a 1.30 times minimum and $360,000 of accepted cash flow, maximum annual debt service is:

**$360,000 ÷ 1.30 = $276,923.08.**

Turning debt service into principal requires an interest rate, amortization schedule, payment frequency, and any underwriting stress. Assume a 7% annual note rate, monthly payments, and 25-year amortization. The monthly rate is 0.07 divided by 12 and the payment count is 300.

The monthly payment per dollar of principal equals the monthly rate divided by one minus the discount factor, or **r ÷ [1 − (1+r)^−n]**. Multiply by 12 to obtain the annual mortgage constant. Under these assumptions the annual constant is approximately 8.4813504%.

Maximum DSCR-supported principal is therefore $276,923.08 divided by 0.084813504, approximately $3,265,082. Rounding in a display can move the final amount slightly; the calculator should use full precision internally.

This is a sizing calculation, not a loan quote. If the lender underwrites a stressed rate or a different amortization period, use those terms. If the cash-flow numerator is reduced for a reserve, the supported principal also falls.

## Test three: debt yield

Debt yield equals accepted annual income divided by the relevant loan balance. Rearranging the equation gives:

**Maximum loan = accepted annual income ÷ minimum debt yield.**

At $360,000 of income and a 9% requirement, the maximum is $4,000,000. Debt yield does not use the interest rate or the amortization period. It is therefore unaffected by making the same loan interest-only, although the lender may still require a separate DSCR test.

Do not confuse a 9% debt yield with an investor's cash-on-cash return or the lender's interest rate. Debt yield measures income relative to debt principal. An investor return measures cash received relative to equity contributed. Both might be expressed as percentages without sharing an economic meaning.

Ask whether the lender tests initial funded principal, total commitment, or another defined balance. A capital facility can make this distinction material. Underwriting a yield against only the first advance while later committing substantial additional debt can conceal the ultimate leverage.

A real May 2025 multifamily loan agreement illustrates the document risk: its debt-yield definition uses defined NCF over the loan amount plus mezzanine debt, and its DSCR definition includes forward debt service on both layers. Those negotiated definitions do not govern another property or replace the simplified assumptions here. They show why the actual denominator matters. [Dean Owner/MF1 definitions schedule](https://www.sec.gov/Archives/edgar/data/1649096/000143774925025574/ex_849368.htm)

## Reconcile the three results

| Constraint | Maximum hypothetical principal |
|---|---:|
| 65% LTV | $3,120,000 |
| 1.30× DSCR, 7% rate, 25-year amortization | Approximately $3,265,082 |
| 9% debt yield | $4,000,000 |
| Controlling limit before other conditions | $3,120,000 |

LTV controls this base case. At $3,120,000, annual debt service is approximately $264,618. DSCR is about 1.360 times and debt yield is about 11.54%. Each remains above its hypothetical minimum.

The practical lesson is that improving a noncontrolling metric may not increase proceeds. If the lender accepts another $100,000 of value, the LTV ceiling rises $65,000, but a sufficiently large increase will eventually encounter the DSCR ceiling. The maximum loan is a moving minimum across several tests.

## A cash-flow downside changes the controlling test

Now reduce accepted income to $300,000 while keeping value at $4,800,000 for the first calculation. DSCR-supported debt service becomes $230,769.23. At the same mortgage constant, supported principal is approximately $2,720,902. Debt yield supports $3,333,333. LTV remains $3,120,000.

DSCR now controls. The gap between $3,120,000 and roughly $2,720,902 is approximately $399,098. If the acquisition budget assumed the larger loan, the sponsor needs more equity, a lower price, a different capital plan, or an acceptable loan structure that changes the binding test.

In a realistic downside, lower NOI may also reduce value. Recalculate both cash flow and value rather than preserving a favorable appraisal assumption automatically. Stress the shared cause consistently: a departing tenant can reduce current income, increase leasing costs, and change valuation simultaneously.

## Interest-only sizing can postpone the problem

At a hypothetical 7% interest-only rate, $276,923.08 of allowed annual interest would support about $3,956,044. That is substantially more than the amortizing DSCR result, but the 65% LTV limit would still constrain this base case to $3,120,000.

Even when interest-only payments permit a larger initial loan, model the later amortizing period and maturity. The interest-only borrower has not paid principal down. A refinance lender might use a higher rate, amortizing debt service, or reduced cash flow. Today's comfortable coverage can coexist with a future funding shortfall.

An exit analysis should calculate the new lender's maximum proceeds and compare them with the old loan payoff, refinance costs, and reserve requirements. If the proceeds cannot cover those uses, show the equity gap explicitly. Do not assume the original lender's ratios continue unchanged.

## Proceeds are different from usable acquisition cash

A $3,120,000 loan commitment may not deliver $3,120,000 to the purchase closing. Origination fees, lender legal costs, escrows, interest reserves, or future-improvement holdbacks can reduce immediately usable proceeds.

For example, if $120,000 is reserved for future qualifying capital work and $40,000 covers fees and required deposits, initial acquisition cash is $2,960,000, assuming those amounts are deducted from the same gross commitment. The uses schedule must still include the future work and associated funding conditions.

Keep gross commitment, initial principal advanced, net closing proceeds, and future availability on separate lines. A buyer comparing term sheets should use the same definitions for every proposal.

## Applying the framework to Chicago properties

For a Chicago-area mixed-use or commercial acquisition, investigate tax assumptions, insurance quotes, recoverable operating costs, lease rollover, and property condition before locking the numerator. These are property-specific research tasks, not reasons to apply an arbitrary local haircut.

A lender might accept less storefront rent than the seller projects or require evidence that a proposed use is lawful and financeable. Document the issue and reconcile its effect rather than arguing only over the final ratio. The property's financing capacity improves through supported cash flow and an executable plan, not just a more optimistic spreadsheet.

Jaken's commercial asset-class overview can help frame the financing discussion. Submit the accepted-income reconciliation and three sizing tests with the request; confirm all actual terms directly. [Jaken commercial financing resources](https://jakenfinancegroup.com/commercial-property-loans-by-asset-class/)

Before submitting a request, preserve the dated assumptions and retain a copy of each lender response. If proceeds change during diligence, reconcile whether the change came from value, accepted cash flow, the debt constant, a reserve, or another condition. That comparison gives the investor a useful explanation instead of an unexplained smaller loan.

The decision rule is straightforward: calculate every applicable constraint, identify the binding one, deduct or separately fund restricted proceeds, and stress the exit. A ratio that passes in isolation does not establish that the transaction is fully financed.

When two constraints are nearly equal, do not round early. Small changes in accepted income, amortization, or valuation can change which limit binds. Retain unrounded calculations in the model, then round the final proposed commitment according to the actual lender’s convention and test the resulting payment again.


The cited Fannie Mae glossary is the version effective April 30, 2026; its terminology is program-specific and should be reconciled with the applicable product and current loan documents.

## Source registry

- [OCC — Commercial Real Estate Lending handbook](https://www.occ.treas.gov/publications-and-resources/publications/comptrollers-handbook/files/commercial-real-estate-lending/pub-ch-commercial-real-estate.pdf): accessed 2026-10-21
- [Fannie Mae — Net Cash Flow glossary, effective April 30, 2026](https://mfguide.fanniemae.com/fnmf-pdf/download/6626): accessed 2026-10-21
- [SEC — Dean Owner/MF1 loan agreement, May 2, 2025, definitions schedule](https://www.sec.gov/Archives/edgar/data/1649096/000143774925025574/ex_849368.htm): accessed 2026-10-21
- [Jaken Finance Group — Commercial property financing by asset class](https://jakenfinancegroup.com/commercial-property-loans-by-asset-class/): accessed 2026-10-21

## Related resources

- [The commercial investor’s guide to financing and capital stacks](https://chicagocommercialfunding.com/learn/financing/)
- [Loan assumptions supplemental debt and lender approvals](https://chicagocommercialfunding.com/guides/loan-assumptions-supplemental-debt-and-lender-approvals/)
- [Bank loans versus debt funds for commercial acquisitions](https://chicagocommercialfunding.com/guides/bank-loans-versus-debt-funds-for-commercial-acquisitions/)