Senior loans are large, floating-rate corporate loans that sit at the top of a borrower’s repayment hierarchy and are backed by the borrower’s assets, so the lender gets paid before any other creditor if the company defaults or files for bankruptcy. They are priced as a spread over the Secured Overnight Financing Rate (SOFR), issued mostly to below-investment-grade companies, and traded in an institutional market that exceeded $1.5 trillion in outstanding U.S. volume by the end of 2025. When people in finance say “senior loan,” they usually mean this leveraged loan product, not the ordinary term loan a small business gets from a community bank.
What “Senior” Means
The word describes where the loan sits in the borrower’s capital structure. A senior loan holds a first-lien security interest in the borrower’s assets, which means no other creditor has a superior claim to the same collateral. In a bankruptcy, senior lenders are paid from the collateral proceeds before second-lien holders, unsecured bondholders, mezzanine lenders, and equity investors.
Priority is real, but it is not the same as being made whole. Under federal bankruptcy law, a secured creditor’s claim is treated as secured only to the extent of the collateral’s actual value at the time of bankruptcy. If the collateral is worth less than the outstanding loan balance, the shortfall becomes an unsecured claim that competes with other unsecured creditors for whatever remains.1Office of the Law Revision Counsel. 11 USC 506 – Determination of Secured Status First-lien senior loans historically recover substantially more than unsecured debt in defaults, but first in line and paid in full are two different things.
Collateral packages typically cover a wide range of the borrower’s assets: equipment, real property, inventory, accounts receivable, and intellectual property. Lenders perfect the security interest by filing a UCC-1 financing statement under Article 9 of the Uniform Commercial Code, which puts other creditors on notice that the assets are already pledged.2Legal Information Institute. Uniform Commercial Code 9-311 – Perfection of Security Interests in Property Subject to Certain Statutes, Regulations, and Treaties Some titled property, like vehicles, requires notation on the certificate of title instead.
How the Interest Rate Is Built
A senior loan’s interest rate has two parts: a floating benchmark and a fixed credit spread. The benchmark for U.S. dollar loans is SOFR, which measures the overnight cost of borrowing cash secured by Treasury securities. SOFR fully replaced LIBOR after the last USD LIBOR settings ceased at the end of June 2023.3Alternative Reference Rates Committee. Transition From LIBOR
The credit spread, sometimes called the margin, is the percentage added on top of SOFR to compensate lenders for the borrower’s specific default risk. A riskier borrower pays a wider spread. Many credit agreements include a pricing grid that ratchets the spread down if the borrower improves its leverage ratio or credit rating. A loan priced at SOFR plus 350 basis points means the borrower pays the current SOFR rate plus an additional 3.50% annually.
Coupons reset every 30, 90, or 180 days based on the prevailing benchmark rate. When short-term rates rise, the borrower’s interest cost rises and the lender’s yield rises with it. When rates fall, the reverse happens, though floor provisions limit how far yields can drop. Maturities generally run five years or longer.
SOFR Floors
Nearly all senior loan documentation includes a floor on the benchmark rate component. If SOFR drops below the floor, lenders are paid as though SOFR were at the floor level. A floor of 0.50% or 1.00% is common. During periods of very low rates, the floor can meaningfully boost a lender’s effective yield above what the benchmark alone would produce. The floor does not affect the credit spread.
Original Issue Discount
Senior loans frequently price at a slight discount to par value at issuance, known as original issue discount, or OID. A loan issued at 99 cents on the dollar means the borrower receives $99 for every $100 of face value but must repay the full $100 at maturity. That difference is additional upfront compensation to lenders. The discount tends to widen for riskier credits or when market conditions are soft.
Call Protection
Unlike bonds, senior loans are generally prepayable at par with no penalty after a short protection window. During that window, the borrower owes a soft call premium of typically 1% if it refinances within the first six to twelve months. Research on institutional term loans has found roughly half include a six-month soft call sunset and about 40% use a twelve-month window. This is notably less restrictive than high-yield bond call protection, which often locks in premiums for several years. Weak call protection is one reason senior loan prices rarely trade far above par even when spreads tighten.
Covenants and the Rise of Covenant-Lite
Loan agreements impose financial covenants that restrict the borrower’s behavior and protect the lender. Historically, senior loans relied on maintenance covenants, which require the borrower to meet specific financial tests (like a maximum debt-to-EBITDA ratio or a minimum interest coverage ratio) at regular intervals, usually quarterly. Failing a test lets lenders demand corrective action, raise the interest rate, or accelerate the loan.
The market has shifted. Over 86% of outstanding leveraged loans now carry only incurrence covenants, a structure known as covenant-lite.4Federal Reserve Bank of Dallas. Evolving Leveraged Loan Covenants May Pose Novel Transmission Risk Incurrence covenants are triggered only when the borrower takes a specific action, such as issuing additional debt, making an acquisition, or paying a dividend. As long as the company avoids those actions, its financial metrics can deteriorate without technically breaching anything. For lenders, that means fewer early-warning signals. For borrowers, it means more operational flexibility.
Whether a loan is covenant-lite or carries traditional maintenance tests matters for risk assessment. A maintenance covenant can force a struggling borrower into negotiations while the company still has enough value to protect lender recovery. A covenant-lite structure can let problems fester until the borrower is in far worse shape.
Who Borrows and Who Lends
Borrowers are overwhelmingly below-investment-grade corporations, often backed by private equity sponsors executing leveraged buyouts or companies financing large acquisitions. Because these borrowers carry more debt relative to their earnings than a typical investment-grade company, the collateral backing and priority position become critical protections.
A single senior loan can run into the hundreds of millions or billions of dollars, too large for any one lender to hold. A lead arranger, usually a major investment bank, structures the deal and syndicates it, selling portions to institutional investors. Collateralized Loan Obligations (CLOs) are the dominant buyers and account for roughly 60% or more of the investor base. A CLO pools dozens or hundreds of senior loans and repackages the cash flows into tranches ranging from AAA-rated senior notes down to equity. Beyond CLOs, capital comes from loan mutual funds, ETFs, business development companies, pension funds, and insurance companies.
Common Uses
The primary use case is financing leveraged buyouts. A private equity firm acquiring a company typically contributes 30% to 40% of the purchase price in equity and borrows the rest, with the senior loan forming the largest and cheapest layer of that borrowed capital. Senior loans also finance corporate mergers and acquisitions, and companies routinely use them to refinance existing debt, extend maturities, or simplify their capital structure.
Senior Loans vs. High-Yield Bonds
Investors often weigh senior loans against high-yield bonds. Senior loans are floating-rate and secured by collateral. Most high-yield bonds pay a fixed coupon and are unsecured. That creates fundamentally different risk profiles.
- Interest rate sensitivity: senior loan prices barely move when rates change because coupons adjust automatically. High-yield bond prices rise when rates fall and drop when rates rise.
- Credit quality: the majority of leveraged loans carry a B credit rating, while the majority of high-yield bonds are rated BB. Despite the lower ratings, senior loans typically recover more in default because of their collateral and priority position.
- Liquidity: bonds are more liquid, trading on established platforms and settling in about two business days. Leveraged loan trades typically settle in around seven business days, involve more documentation processed through the Loan Syndications and Trading Association framework, and can show wider bid-ask spreads in stressed markets.
- Upside potential: because loans are callable with minimal penalty after the soft call period, their prices rarely trade far above par. Bonds with longer call protection can appreciate significantly when spreads tighten or rates drop.
In a rising-rate environment, senior loans tend to outperform high-yield bonds because their coupons adjust upward while bond prices fall. In a falling-rate environment, bonds benefit from price appreciation while loan yields decline, subject to the SOFR floor.
Risks of Senior Loans
Collateral and senior position reduce risk relative to unsecured debt, but senior loans are not safe assets. The borrowers are below-investment-grade companies carrying heavy debt loads.
- Default risk: when a borrower cannot service its debt, the loan’s secondary market price drops immediately. Even first-lien collateral does not guarantee full recovery, particularly for companies whose assets are largely intangible.
- Liquidity risk: the over-the-counter structure and slow settlement mean positions cannot always be exited quickly. During market stress, bid-ask spreads widen and some loans have few active buyers, forcing sellers to accept steep discounts.
- Covenant erosion: the shift to covenant-lite means fewer contractual levers when a borrower’s financial health deteriorates. By the time an incurrence covenant triggers, the damage may already be done.4Federal Reserve Bank of Dallas. Evolving Leveraged Loan Covenants May Pose Novel Transmission Risk
- Falling-rate risk: while the SOFR floor provides a cushion, senior loans underperform fixed-rate bonds when rates decline. The coupon drops as the benchmark falls, and limited call protection means borrowers refinance quickly when spreads tighten, returning capital to lenders at the worst time.
These risks compound during recessions, when defaults rise, collateral values fall, and secondary market liquidity dries up at the same time. Investors who treat senior loans as a safe alternative to high-yield bonds because of the “senior secured” label often underestimate how correlated these risks become under stress.
How Individual Investors Get Exposure
Direct participation in the leveraged loan market requires institutional scale, but several fund structures provide indirect exposure. Senior loan mutual funds and ETFs hold diversified portfolios of leveraged loans and trade through any standard brokerage account. These funds offer daily or intraday liquidity even though the underlying loans settle on a much slower timeline, which can create a mismatch during periods of heavy redemptions.
Business development companies (BDCs) are another route. BDCs are publicly traded or non-traded companies that lend directly to middle-market borrowers and pass most of their income through to shareholders. They tend to offer higher yields than loan mutual funds but come with more concentrated portfolios and additional risks tied to the BDC’s own leverage and management fees.
Interval funds, which offer periodic redemption windows rather than daily liquidity, have gained traction as vehicles for senior loan exposure. The less frequent redemption schedule better matches the liquidity profile of the underlying loans and reduces the forced-selling pressure that can hurt open-end fund investors during downturns.
Tax Treatment
For corporate borrowers, interest paid on senior loans is generally deductible as a business expense, but federal law caps the deduction. Under Section 163(j) of the Internal Revenue Code, a business can deduct interest expense only up to the sum of its business interest income plus 30% of its adjusted taxable income.5Internal Revenue Service. Questions and Answers About the Limitation on the Deduction for Business Interest Expense Any disallowed interest carries forward. For heavily leveraged borrowers, the cap can meaningfully increase the effective after-tax cost of carrying senior debt.
On the investor side, interest income from senior loans is taxed as ordinary income, not at the lower capital gains rate. For individual investors holding loan funds in taxable accounts, that tax treatment can eat into the yield advantage that made the investment attractive in the first place. Holding senior loan funds inside tax-advantaged accounts like IRAs avoids the issue.