Interest-rate floor protection and borrower downside

An interest-rate floor limits how far the loan’s coupon can fall. It can protect lender income while preventing the borrower from receiving the full benefit of a declining benchmark. The key question is where the floor applies: to the benchmark, to the all-in coupon, or to a specially defined adjusted rate.

The ARRC’s Term SOFR conventions, Interest Rate Floor section distinguishes recommended new-loan and legacy-fallback treatments. These are conventions, not mandatory contract terms. Read the actual loan definitions and amendments before applying a formula. All rates and balances below are hypothetical.

Translate the clause into a formula

Assume $4 million of constant interest-only principal and a 3% margin. Compare two different provisions:

Benchmark floor: coupon = max(reference rate, 2%) + 3%

All-in floor: coupon = max(reference rate + 3%, 4.5%)

The two provisions are not equivalent. Under the benchmark-floor loan, a decline from 2% to 1% produces no interest savings. A no-floor model would have projected a 4% coupon and $160,000 of annual interest, understating the actual assumed payment by $40,000.

This table uses annual simple interest on an unchanged balance. Actual accrual periods, day counts, reset dates, benchmark rounding, spread adjustments and payment timing require the signed documents. A monthly payment estimate obtained by dividing by 12 is a planning simplification, not necessarily the billed amount.

Find the point where the benefit stops

With $300,000 of annual property cash flow, the benchmark-floor loan’s coverage is 0.938x at the 5% reference scenario, 1.25x at 3%, and 1.50x at or below 2%. The apparent improvement stops at the floor. A business plan that relies on additional benchmark declines to fund capital work would be unsupported under that provision.

Suppose the borrower needs $130,000 after interest for reserve deposits and capital spending. At the 5% minimum coupon, cash remaining is only $100,000, leaving a $30,000 gap. Even a reference rate of zero does not close it. The planning response must involve income, costs, principal, other funding or an agreed change in terms rather than a lower benchmark alone.

Keep a purchased cap separate from the note

Now add a hypothetical benchmark cap with a 4% strike, a $4 million constant notional and matching annual measurement for illustration. At a 5% reference rate, the note still accrues 8%, or $320,000. The cap separately pays $4 million × (5% − 4%) = $40,000. Net financing cash before the cap’s purchase cost is $280,000.

Gross note DSCR remains $300,000 ÷ $320,000 = 0.938x under that definition. Net cash coverage after the assumed receipt is $300,000 ÷ $280,000 = 1.071x. Do not present the second ratio as the contractual DSCR unless the loan’s definition permits that treatment.

At a 1% reference rate, the note’s benchmark floor still produces $200,000 interest and the cap pays nothing. A cap limits specified upside exposure; it does not remove the loan floor. The premium, counterparty requirements, expiry and payment timing remain separate cash and contract issues.

Check the reset lag

A lower published benchmark does not necessarily change the next invoice immediately. If the note resets on a specified observation date, an intervening market decline may affect a later interest period. The hedge can use its own observation and settlement conventions. Put those dates on the cash schedule before offsetting a projected cap receipt against a note payment. A receipt expected after the payment date may reduce ultimate financing cost while leaving an interim funding need. The annual table deliberately omits that timing and should not be used as a payment notice.

Reconcile balance and hedge notional

If principal amortizes but the cap notional stays at $4 million, the hedge and debt no longer match exactly. If future advances increase debt above the notional, part of the exposure may be unhedged. Prepare separate balance and notional schedules instead of applying a single net coupon to every outstanding dollar without explanation.

A replacement cap at extension may also have a different cost or strike. Do not assume the initial premium purchases protection through every possible loan extension. Record the actual hedge expiry beside the loan maturity and any extension conditions.

For a lender comparison, request the benchmark definition, margin, floor basis, reset frequency and hedge treatment in writing. Recalculate downside and upside cash using those definitions. The decision should reflect the point where falling rates stop helping, the payment exposure when rates rise, and the amount of cash protection actually available from any separate hedge.