Sizing and replenishing a construction interest reserve

An interest reserve is a funding mechanism for interest payments during development. It does not make interest disappear or demonstrate that a finished property can repay the loan. The borrower's decision is how much reserve is needed, how it is funded, and what happens if construction or leasing takes longer than expected. OCC guidance warns that slower lease-up can exhaust reserves before a property produces enough income.^[1]

The word reserve can describe different structures. One facility may allocate an undrawn portion of the commitment to future interest advances. Another may fund money into an account at closing. Another may require borrower cash. The loan documents determine availability, interest accrual, replenishment, and use of any balance. A borrower should map those mechanics before comparing reserve amounts across term sheets.

Identify whether money is funded or merely allocated

For an undrawn interest allocation, determine when each interest advance becomes loan principal, whether interest can be advanced on previously capitalized interest, and which conditions apply. For a funded account, determine who owns or controls it, whether it earns account interest, and when the underlying loan principal starts accruing loan interest. A historical construction form filed with the SEC demonstrates a funded structure with a restricted reserve and a continuing borrower payment obligation after depletion. That form is not evidence that every facility works the same way.^[2]

The executed CW Broadway agreement provides another useful distinction: an advance can be disbursed for project purposes to parties other than the borrower, while interest begins on the loan advance. Its budget controls also restrict changes affecting construction interest.^[3] Money paid directly to an approved project account is therefore not necessarily outside the debt balance.

Ask for a sample monthly servicing statement and ledger. Reconcile beginning principal, construction advances, interest advances, payments, ending principal, and remaining allocation. A forecast based on the commitment alone can substantially misstate the interest paid during a staged construction program.

Forecast balances by month

Use the expected draw schedule rather than assuming the entire commitment is outstanding for the entire construction period. For each month, estimate the balance on which interest accrues and apply the actual day-count and rate provisions. Account for rate floors, changing benchmarks, fees, and any effect of interest advances on subsequent principal. Separate the accrual forecast from the timing of invoice payment.

For a simplified hypothetical example, assume a $90 million commitment and an interest allocation that is undrawn until needed. Assume four six-month periods with average interest-bearing balances of $20 million, $45 million, $65 million, and $80 million. Those averages expressly include anticipated interest advances. At an assumed constant 8% annual rate using half-year periods, interest is $800,000, $1.8 million, $2.6 million, and $3.2 million. Total modeled interest is $8.4 million.

Suppose the approved interest allocation is $9 million. The difference is $600,000 of headroom under this simplified base case. It is not an extra $9 million available for delays. If leasing is slower, the borrower should distinguish interest already allocated to the base schedule from the balance available beyond it.

For a downside case, assume the same balances but a 9% rate throughout the original 24 months. Interest becomes $900,000, $2.025 million, $2.925 million, and $3.6 million, totaling $9.45 million. A further three months at an $85 million average balance and the same 9% rate adds $1.9125 million. Total interest is $11.3625 million, or $2.3625 million above the $9 million allocation. These inputs are hypothetical, not a forecast of rates.

Distinguish reserve adequacy from commitment adequacy

If the interest allocation sits within the construction commitment, moving additional money into interest can reduce the amount available for hard costs or other project uses. An apparent interest cure may therefore create a completion deficiency. CW Broadway's executed agreement requires budget approval and contains a separate balancing mechanism, including analysis at individual categories.^[3]

Reconcile every proposed transfer against the remaining full project budget. Do not describe the unused construction line as a saving until the related work has been priced and its obligations settled. A $1 million reallocation is helpful only if that dollar is genuinely no longer needed elsewhere and the required consent is obtained.

A larger commitment is a different solution from a larger allocation. It needs credit approval and may change leverage, guarantees, fees, and exit proceeds. Additional borrower cash can support the reserve without increasing senior principal, but the documents determine whether cash must be deposited, whether it can be withdrawn later, and what other obligations it secures.

Include property income without counting it twice

As units begin producing rent, decide which cash is available for interest after operating costs, taxes, insurance, and required escrows. Forecast collections, concessions, and unit-delivery dates. Do not offset interest with gross rent or with restricted tenant deposits. OCC construction monitoring guidance includes lease-up performance and the sufficiency of remaining funds.^[1]

In the downside example, assume $450,000 of cumulative operating cash is permitted and available for interest, and is absent from all other funding calculations. It reduces the uncovered requirement from $2.3625 million to $1.9125 million. If that same cash is already needed for operating deficits or a balancing deposit, it cannot also replenish interest. Maintain a single cash ledger linking the construction, operating, and reserve models.

Set a replenishment decision date

The reserve forecast should show the month at which usable funds run out, the projected balance before that point, and the lead time required to obtain replacement cash or an amendment. Portfolio servicing guidance includes management of draws, escrows, interest changes, covenants, and maturity events.^[4] Those functions support a regular reconciliation rather than a one-time closing calculation.

Contractual payment status also needs careful interpretation. The interagency workout policy explains that interest reserves can keep loans current while principal repayment remains at risk.^[5] That is a reason to evaluate repayment and reserve adequacy separately. It is not a prediction that a particular reserved loan will default.

Agree the replenishment source before the balance approaches zero. The historical SEC form makes the borrower responsible for interest after reserve exhaustion, and its terms illustrate why depletion does not suspend the payment obligation.^[2] A sound reserve plan connects the construction schedule, interest-bearing principal, rate exposure, available operating cash, and permanent payoff, with enough time to act when any assumption changes.

For the funded-account alternative, retain two distinct balances: the amount available in the reserve account and the interest-bearing loan principal. They may move differently. A payment from a previously funded account can reduce cash without creating a new advance, whereas an eligible advance from an undrawn allocation can increase principal. Model the actual mechanism rather than substituting one account ledger for the other. Include the forecast account earnings only when those earnings are available for the same payment obligation, and present them separately from the loan coupon.