Combined senior and subordinate debt coverage

A senior mortgage can be well covered while the property’s total debt payments exceed available cash. Subordinate financing adds obligations even when it does not appear in a senior-only ratio. The investor needs a payment-priority schedule that distinguishes current cash interest, amortization, deferred amounts, and the balances ultimately due.

A 2025 CMBS preliminary term sheet filed with the SEC separately presents mortgage-loan and total-debt coverage in its additional-financing table. This historical disclosure illustrates the distinction; it does not determine another loan’s covenant or lien rights. The original example below isolates combined cash burden and the effect of deferring subordinate payments.

Build the obligation register by entity

For each debt instrument record borrower, lender, principal, collateral, rate, payment frequency, amortization, maturity, and permitted deferral. Identify whether the subordinate obligation is a mortgage, a mezzanine loan secured by ownership interests, or another instrument. Similar economics can coexist with different legal rights.

Read the actual debt and intercreditor documents with counsel. A scheduled payment may be contractually due but restricted from being paid during a senior default or cash-control event. That distinction belongs in the register. Payment blockage does not automatically extinguish the junior obligation or authorize a new deferral agreement.

Separate preferred-equity distributions from debt rather than relabeling them casually. Their treatment in lender ratios, cash waterfalls, and remedies requires the governing documents. The combined cash schedule can show required payments without claiming that every economic obligation has the same legal status.

Calculate the base case in payment order

Assume fictional annual recognized cash flow of $500,000. A $4 million senior loan bears 7% interest only, and a $1 million subordinate loan bears 12% current-pay interest only. There are no fees, reserves, amortization, principal changes, or other modeled uses during the year.

Annual senior interest is $280,000 and subordinate interest is $120,000. Senior-only coverage is approximately 1.786 times. Combined coverage is 1.25 times because total annual cash debt service is $400,000.

In the lower-income case, a positive senior cushion does not fund all junior interest. The negative $20,000 result must remain visible. Clamping residual cash to zero would hide the amount the owner needs to contribute or otherwise resolve.

Model a permitted deferral explicitly

Suppose, purely for illustration, the relevant parties permit the $20,000 unpaid subordinate interest to be added to principal at year-end, with no compounding or additional fee during that year. Current cash can then be balanced by paying $100,000 to the subordinate lender, but its balance increases from $1 million to $1.02 million.

That is a change in timing and debt outstanding, not a cure to recurring economic coverage. The lender’s contractual DSCR may continue to include the scheduled $120,000 or may use another definition. Record both the original obligation and the agreed payment treatment instead of reporting a higher ratio without explanation.

A separate full-PIK scenario makes the tradeoff clearer. If all $120,000 subordinate interest is capitalized once at year-end under the assumed terms, annual cash debt service is only $280,000, but total debt grows from $5 million to $5.12 million. Next-period accrual may then apply to the larger balance if the documents provide for compounding; do not assume the same dollar interest forever.

Test timing as well as annual totals

A property may generate most of its cash seasonally while both loans require monthly payments. Divide the waterfall into actual payment periods and include minimum operating liquidity. An annual $100,000 surplus does not guarantee cash will be available on each payment date.

Add reserve releases only when the documents permit their use. A reserve for capital improvements may not be available for subordinate interest. Similarly, cash held in a senior-controlled account may not reach the junior borrower on the date its payment is due. Model the transfer path and approval conditions.

If senior principal amortizes while subordinate principal does not, roll both balances forward separately. A declining senior balance can improve some leverage metrics while a capitalizing junior balance offsets the reduction. Aggregate the actual balances for exit analysis rather than assuming total debt falls with the senior amortization schedule.

Reconcile the maturity stack

Identify whether maturities align and which debt must be repaid on a sale or refinance. A replacement senior loan may be smaller than total outstanding obligations even when it can repay the existing first mortgage. Include accrued amounts, exit fees, and other payoff items supported by the documents.

Prepare separate columns for contractual senior coverage, combined current-pay coverage, actual cash remaining, and total future payoff. Those outputs answer different questions and should not be substituted for one another.

The completed payment-priority schedule lets the owner see where cash stops, which obligation remains, and how today’s deferral changes tomorrow’s balance. It also gives the lender a clear account of subordinate financing without treating an acceptable first-mortgage ratio as proof that the entire capital structure is affordable.