Floating-Rate Loans Explained
Floating-rate loans can boost BDC income when rates rise, but the same mechanism can pressure borrowers and create future credit stress.
Last updated: May 2026
A floating-rate loan is a loan whose interest rate changes as benchmark rates move. Instead of paying one fixed rate for the life of the loan, the borrower usually pays a benchmark rate, such as SOFR, plus a credit spread.
For BDC investors, floating-rate loans matter because many BDC portfolios are built around them.
When rates rise, floating-rate loans can increase the income a BDC earns from its borrowers. That can lift net investment income, strengthen dividend coverage, and support higher distributions.
But the borrower is the one paying the higher rate.
That is the investor-useful tension: floating-rate loans can make a BDC look stronger today while increasing borrower stress that may show up later through amendments, PIK income, non-accruals, NAV pressure, or weaker dividend coverage.
The same mechanism can feed the dividend and pressure the loan book.
That is why investors need to understand how it works.
The Hidden Engine Beneath Modern Private Credit
For years, low interest rates quietly reshaped the financial system.
Cheap debt changed how companies operated.
Private equity firms borrowed aggressively.
Corporations refinanced constantly.
Investors stretched for yield.
Banks loosened structures.
Lenders accepted thinner protections.
And eventually, an enormous lending system formed around one central assumption:
money would remain relatively cheap
Then rates surged.
Suddenly, one of the most important — and least understood — instruments in modern finance moved to the center of the system:
Floating-rate loans.
Today, trillions of dollars in private credit, leveraged finance, middle-market lending, CLOs, and Business Development Companies depend on floating-rate structures.
The mechanism sounds technical.
But its consequences are deeply human.
A floating-rate loan can mean higher income for lenders, stronger dividends for BDC investors, and rising earnings across private credit.
But it can also mean higher stress for borrowers, growing refinancing pressure for businesses, and default risk slowly building beneath apparently healthy financial results.
The same structure that boosted income across private credit after 2022 may also become one of the mechanisms transmitting stress through the system.
And most investors still barely understand how it works.
What Is A Floating-Rate Loan?
A floating-rate loan is a loan whose interest rate changes over time.
Instead of paying a permanently fixed rate, the borrower pays:
benchmark rate + credit spread
The benchmark is usually tied to short-term interest rates.
Historically, many floating-rate loans were tied to LIBOR — the London Interbank Offered Rate — which functioned for decades as one of the world’s most important benchmark interest rates.
After scandals and structural problems undermined confidence in LIBOR, the financial system gradually shifted toward new benchmarks.
Today, most floating-rate loans are tied to SOFR — the Secured Overnight Financing Rate — which is based on transactions inside the U.S. Treasury repurchase market.
Some loans may also use bank base rates or other short-duration benchmarks depending on the lender and structure.
The spread reflects the lender’s compensation for risk.
For example:
SOFR + 5%
If SOFR rises, the borrower’s interest expense rises alongside it, while the lender’s income increases.
If SOFR falls, borrowing costs decline and lender income falls as well.
The loan “floats” with prevailing rates.
That flexibility became enormously attractive inside modern private credit.
Why Floating-Rate Lending Exploded
For most of the post-2008 era, interest rates remained unusually low.
That environment created several pressures simultaneously.
Investors desperately needed income.
Private equity firms wanted cheap leverage.
Banks faced tighter post-crisis regulation.
Private lenders stepped into the gap.
Direct lending expanded rapidly.
Middle-market finance increasingly moved outside traditional banking channels.
And floating-rate loans became one of the dominant instruments supporting that expansion.
Why?
Because lenders feared eventually being trapped inside low-yield fixed-rate loans if inflation or rates rose.
Floating-rate structures protected lender income.
For years, that protection barely mattered because rates remained near zero.
Then the Federal Reserve began one of the fastest tightening cycles in decades.
Suddenly, loan yields surged.
Lender income exploded higher.
BDC earnings jumped.
Dividends increased across the sector.
At first glance, the system looked stronger than ever.
But underneath the rising income sat another reality:
Borrowers were absorbing dramatically higher interest costs.
Why BDC Investors Care So Much About Floating Rates
Most BDC portfolios are heavily concentrated in floating-rate loans.
That means rising rates directly increase investment income.
This became one of the defining stories of the BDC sector after 2022.
Many firms reported higher Net Investment Income, supplemental dividends, special distributions, rising portfolio yields, and stronger earnings coverage.
The market initially treated this as overwhelmingly positive.
And for lenders, in many ways, it was.
A loan previously generating 6% might suddenly generate 10%+ with no additional principal deployed.
That dramatically increased income generation.
But the other side of the transaction matters too.
Because the borrower is paying the increase.
The Pressure Building Beneath Borrowers
Floating-rate loans transfer rate risk onto the borrower.
When rates rise sharply, interest expense increases.
Cash flow tightens.
Refinancing becomes harder.
Debt-service coverage weakens.
Default risk increases.
Some companies can absorb that pressure.
Others cannot.
This becomes especially dangerous in private equity-backed middle-market businesses already carrying substantial leverage.
Many borrowers entered the post-2020 environment assuming rates would eventually normalize lower.
Instead, financing costs stayed elevated far longer than expected.
That creates one of the central tensions now sitting inside private credit:
The same rate increases boosting lender income may simultaneously weaken borrower stability.
Which means:
today’s strong earnings can contain tomorrow’s credit problems
Why Floating-Rate Loans Matter To The Entire Financial System
Most people never directly interact with leveraged loans.
But the system underneath them increasingly finances large portions of the real economy.
Middle-market businesses supported by floating-rate debt include healthcare operators, software firms, manufacturers, logistics companies, infrastructure providers, industrial services businesses, and consumer brands.
The pressure inside private credit eventually flows outward.
When debt costs rise, hiring slows, investment slows, refinancing becomes difficult, acquisitions decline, private equity exits weaken, and defaults increase.
This is one reason floating-rate structures matter beyond Wall Street.
They influence the economic behavior of thousands of operating companies.
The CLO Connection
Floating-rate loans also became foundational to another enormous market:
Collateralized Loan Obligations.
CLOs purchase pools of leveraged loans and package them into structured securities.
The system depends heavily on floating-rate cash flows.
When rates rise, CLO income initially improves, loan coupons increase, and cash generation expands.
But prolonged stress can eventually damage the underlying borrowers.
That means the same structure enhancing short-term cash flow can increase long-term credit fragility.
Modern private credit increasingly depends on this balancing act.
Why Investors Watch Refinancing Risk Closely
Many floating-rate borrowers assumed refinancing would remain easy.
That assumption shaped capital structures, acquisition prices, leverage levels, sponsor underwriting, and growth expectations.
Now the environment is changing.
Loans originated during ultra-low-rate years are approaching maturity inside a much more expensive credit environment.
That creates what many analysts call:
the refinancing wall
Borrowers may eventually need to refinance debt at significantly higher rates.
Some businesses can survive that transition.
Others may discover their economics only worked under cheap-money conditions.
This is one of the most important risks now developing across private credit.
Why Floating-Rate Income Can Mislead Investors
One of the easiest mistakes in BDC analysis is assuming rising income automatically means improving fundamentals.
Sometimes rising income simply reflects higher borrower stress.
That distinction matters enormously.
A lender can report strong earnings, stable dividends, and healthy Net Investment Income while portfolio pressure quietly builds underneath.
This is why sophisticated investors increasingly monitor non-accruals, interest coverage, leverage ratios, refinancing exposure, sponsor support, NAV stability, and borrower cash flow deterioration rather than focusing only on current yield.
Because floating-rate systems often look strongest shortly before pressure becomes visible.
The Psychological Shift Happening Inside Private Credit
For years, low rates encouraged investors to treat leverage as relatively manageable.
Floating-rate loans changed the psychology of the system.
When rates remained low, floating-rate exposure seemed beneficial, lenders gained downside protection, refinancing looked abundant, and defaults stayed contained.
When rates surged, lender income increased dramatically — but uncertainty increased too.
Now investors increasingly ask:
How much stress is hidden beneath elevated earnings?
That question now sits near the center of BDC analysis.
And the answer may determine how resilient modern private credit proves to be during the next downturn.
What Drift Watches In Floating-Rate Lending
Drift is less interested in celebrating temporarily elevated yields.
The deeper questions are structural.
- How much borrower stress is accumulating beneath rising lender income?
- Which sectors are most vulnerable to refinancing pressure?
- Are private-credit marks fully reflecting risk?
- How dependent are current dividends on unusually elevated base rates?
- What happens if rates stay high longer than expected?
- What happens if rates fall rapidly because economic conditions deteriorate?
- How much of modern private credit only worked under cheap-money assumptions?
Because floating-rate loans are not merely technical financing instruments.
They are one of the transmission mechanisms through which monetary policy, private equity, refinancing pressure, and credit stress now move through the economy.
And the full consequences of that system may only be starting to emerge.
