Interest rate caps on floating rate loans, explained

Most floating rate loans come with a second purchase attached. The lender requires the borrower to buy an interest rate cap, and the cost of that cap can change the economics of a deal as much as the loan terms do. Knowing how caps work, what lenders ask for, and how to plan for renewals helps a borrower budget accurately and avoid surprises at closing or midway through the hold.

What an interest rate cap does

A cap is a contract with a third party, usually a bank, that pays the borrower when the floating index rises above a set level, called the strike. The borrower pays an upfront premium. In return, the interest cost on the loan is effectively limited to the strike plus the loan spread.

A few points matter:

• The cap is separate from the loan. It is bought from a cap provider, not the lender, though it is pledged to the lender as collateral.
• The cap pays monthly when the index is above the strike. Those payments typically flow to the lender or into a reserve.
• The cap protects against rising rates. It does not lower the rate when the index is below the strike.

Why lenders require one

A floating rate lender sizes the loan on today's cash flow. If rates climb, debt service climbs with them, and coverage can fall below what the lender is comfortable holding. A cap puts a ceiling on that risk. Bridge lenders, debt funds, and CMBS floating rate programs commonly require one. Banks sometimes accept a swap or no hedge at all, depending on the relationship and the borrower's liquidity.

Lenders usually specify:

• The strike, often set so the property still covers debt service at the capped rate
• The term, usually matching the initial loan term
• The notional amount, typically the full loan amount
• The provider's minimum credit rating

What drives the cost

The premium depends on several factors the borrower does not control and a few the borrower can influence.

Market factors

Cap pricing moves with expected future rates and with rate volatility. When markets expect rates to stay high or to swing widely, caps get more expensive.

Deal factors

• Strike. A higher strike means less protection and a lower premium.
• Term. Longer coverage costs more.
• Notional. Covering a larger balance costs more.

Negotiating the strike with the lender is often the most useful lever. A borrower who can show the property covers debt service at a higher rate may be able to justify a higher strike and a cheaper cap.

Plan for the extension

The cap that comes with a new loan usually covers only the initial term. Most floating rate loans have extension options, and those options almost always require buying a new cap. Lenders may also require a cap reserve, funded monthly, so money is set aside before the replacement is due.

This is where borrowers get caught. A replacement cap bought in a different rate environment can cost far more than the original. If the extension also carries a coverage test, the new strike and that test interact. Model both before you sign the loan, not when the extension date arrives.

Questions to ask up front:

• What strike and term will the lender require for each extension?
• Is a cap reserve required, and how is it sized?
• Can the cap be assigned to a new lender in a refinance or sale?
• If the cap has value at payoff, who receives it?

Caps, swaps, and fixed rate debt

A cap is not the only option. A swap converts a floating rate to a fixed rate for its term. There is no upfront premium, but there can be a breakage cost if the loan is repaid early. Fixed rate debt avoids the hedge question but usually brings its own prepayment terms. The right choice depends on the business plan, the expected hold, and how much flexibility the borrower needs to sell or refinance.

The cap is part of the cost of floating rate debt. Budget it, negotiate its terms alongside the loan, and plan for its renewal on day one. To see how a higher rate affects proceeds and coverage, try the debt sizing tool. If you are weighing a floating rate loan and want a second look at the hedge requirements, contact us.