Fixed vs Floating Commercial Loan

A fixed vs floating rate commercial loan is a choice between payment certainty and a coupon that moves with a reference rate, most often SOFR plus a spread. The right answer depends on hold period, lease structure, and whether you can live with payment shock. It is not a slogan about “rates going down.” This article does not quote a rate or promise a coupon.

Floating commercial paper is usually indexed to a short-term reference rate, most often SOFR plus a spread. The Federal Reserve’s selected interest rates release is a public board source many desks watch for money-market prints. Your loan documents will say which SOFR tenor, the lookback, the floor, and the spread. Those clauses are the loan. A marketing one-liner is not.

Fixed paper trades that complexity for a known accrual. You still have prepay cost, a maturity, and covenants. You do not have a reset surprise every month unless you later refinance into floating.

Fixed vs Floating Rate Commercial Loan: Caps and Payment Shock

On a floating loan, two documents do the real work: the note (index, spread, floor, reset) and, often, a rate-cap agreement. A cap is an option that pays when the index exceeds a strike. Sponsors buy caps because the lender requires one, because a mezzanine or preferred-equity partner requires one, or because the sponsor wants a ceiling they can model.

When a cap “shows up in the docs,” look for:

• Who must buy it, and by what closing date
• Strike, notional, and term versus the loan term
• Whether the lender is named as loss payee or has a security interest in the cap
• Replacement rules if the cap expires before the loan
• What happens if you fail to keep the cap in force

A cap is not free. The premium is a closing cost. A cheap cap with a high strike may satisfy a checkbox and still leave you exposed to a payment you cannot make. A tight strike costs more and actually protects DSCR.

Fixed loans rarely require a cap. The payment is the protection. The trade is less flexibility if you sell or refinance early, because prepay structures on fixed paper are often heavier: yield maintenance, defeasance, or a long step-down.

Payment Certainty Versus Lease Reality

If your leases are long, fixed, and investment-grade, a floating loan can create a mismatch: rent is flat, debt service moves. That is when a cap or a fixed coupon is a risk tool, not a religion. If your leases float, have bumps, or you have a short hold with a planned sale, floating plus a modest cap can be cheaper in total cost than paying a long fixed prepay to exit.

Interest-only periods interact with both. An IO period lowers near-term debt service and can make a floating coupon look comfortable until amortization starts and the index has risen. Run the payment at the cap strike, not at today’s index print.

Amortization versus IO is a separate decision from fixed versus floating. You can have fixed IO, floating amortizing, or any mix the desk will sell. Do not assume “floating” means IO or that “fixed” means fully amortizing.

Rate Lock Is Not the Same as a Fixed Coupon

A commercial rate lock can apply to a fixed loan you have not closed yet. It is a process with deposits and expiration. A floating loan may lock only the spread, while the index keeps moving through closing. Read which piece is locked.

After closing, a fixed coupon is the lock. A floating coupon is not locked unless you buy a swap or a cap, and those are separate contracts with their own counterparties and termination math. Do not call a cap a “rate lock.” It is a ceiling, not a fixed payment.

Floors matter on floating notes. A floor under the index means you do not get the full benefit of a very low print. Model the floor plus spread as your best case, and the cap strike plus spread as the case the desk is underwriting toward.

Lookback, Day Count, and Why the Print Is Not the Payment

SOFR-plus notes often use a lookback of a few business days so the servicer can set the payment before the period starts. Day-count conventions and whether the floor applies to SOFR alone or to SOFR plus spread change the dollar payment. Read those lines. The index print you saw in a headline is not the payment that hits the lockbox.

A swap is a different contract from a cap. A swap can fix a payment by exchanging floating for fixed with a counterparty. A cap only limits how high the index can go for the protected notional. Do not treat them as synonyms in the loan agreement.

How Desks Underwrite the Choice

Coverage tests on floating loans often use a stressed rate, a cap strike, or a minimum coupon. That is why a file can “work” on the current SOFR print and fail the underwritten payment. Ask which rate they use in DSCR and debt yield. Debt yield does not care about the coupon. DSCR does. A floating deal can look fine on debt yield and tight on stressed DSCR.

Covenants can require you to maintain a cap. Breach of that covenant is not a paperwork nit. It can be a default. Budget the renewal before the cap expires.

No coupon in this article is an offer. Overlays vary. A confidential scenario is how you see which structure a desk will actually write on your leases.

Have a commercial or mixed-use investment property in mind? Start with a confidential inquiry or call (907) 841-1600.

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Frequently Asked Questions

Is SOFR-plus the same as a consumer ARM?

No. A consumer ARM has consumer disclosures and typically a stated margin and adjustment caps in a residential note. A floating commercial loan is a negotiated credit agreement: index tenor, floor, spread, and often a separate cap contract. Do not import consumer ARM rules into a commercial close.

When does a commercial lender require a rate cap?

Often on floating first mortgages, and almost always when a structured or higher-leverage stack needs a modeled maximum payment. The loan agreement will say the strike, term, and collateral assignment. If the cap is required, closing without it is not a timing issue. It is a condition.

Can I start floating and fix the rate later?

Sometimes through a refinance, a swap, or a conversion feature if the documents allow it. Conversion is not standard on every note. A later refinance can trigger prepay on the floating loan even if floating prepays are lighter than fixed. Read the current note before you treat “I’ll fix it later” as a plan.

Does a fixed commercial loan eliminate interest-rate risk?

It eliminates reset risk on that note. You still have maturity risk, refinance risk, and prepay cost if you exit early. A fixed coupon that you cannot afford to break is its own trap. Match the fixed term to a hold you actually believe, not to a hope that you will never need to sell.