Private debt is capital loaned to companies by non-bank lenders through agreements that are negotiated directly between borrower and lender and not traded on public exchanges. It sits alongside bank loans and public bonds as a third channel for corporate borrowing, but the loans are held privately rather than issued into a market. The global private credit market passed $2 trillion by mid-2024, having grown roughly fivefold since 2009, which makes it one of the fastest-expanding segments of alternative finance.1Board of Governors of the Federal Reserve System. Bank Lending to Private Credit: Size, Characteristics, and Financial Stability Implications
How the Market Grew
Private debt expanded after the 2008 financial crisis, when tighter banking rules pushed traditional lenders away from riskier commercial loans. Private pools of capital moved in to serve the businesses banks stepped back from. Between 2009 and the end of 2023, the private credit market grew roughly tenfold, far outpacing the 45% inflation rate over the same period.2U.S. Securities and Exchange Commission. Temporarily Terrified by Thomas: Remarks on Private Credit
The regulatory picture explains a lot about how private debt behaves. Bank lending sits under strict prudential oversight, and public bond markets require detailed disclosures. Private credit funds and their advisers fall under a mostly non-prudential SEC framework, and public disclosures or regulatory filings for these vehicles are generally not available.1Board of Governors of the Federal Reserve System. Bank Lending to Private Credit: Size, Characteristics, and Financial Stability Implications That gives the market flexibility and speed, and leaves outside observers with less visibility than they get in public markets.
The Main Types of Private Debt
Private debt is not a single instrument. It covers a range of loan structures that differ in risk, expected return, and where each sits in the repayment order if the borrower fails.
Direct Lending
Direct lending is the largest strategy in private credit, accounting for roughly 36% of total assets under management. These loans are senior secured debt, so they sit at the top of the repayment hierarchy and get paid first if the borrower is liquidated. Lenders secure them against specific company assets, such as real estate, equipment, or intellectual property.
For borrowers, direct lending is a faster route than a bank syndicate or a public bond deal. One lender or a small group negotiates directly, and the deal closes without a wide circle of participants.
Mezzanine Debt
Mezzanine debt sits between senior loans and equity. Because mezzanine lenders are among the last creditors repaid, they price for the added risk. Total returns typically run 12% to 17%, with a coupon of 10% to 14% and the rest coming from an equity kicker such as warrants or conversion rights that let the lender take an ownership stake.
Mezzanine loans are rarely secured against specific assets, and senior lenders often treat them as closer to equity than to debt. Borrowers use mezzanine financing to bridge the gap between what a senior loan will provide and the equity they put up themselves, a structure common in leveraged buyouts and expansion deals.
Unitranche Debt
Unitranche financing merges senior and subordinated debt into a single loan with one blended rate and one set of terms. Instead of negotiating with a senior lender and a mezzanine provider separately, the borrower signs one credit agreement, usually with a term of five to seven years. The lenders may divide the loan into first- and second-priority pieces on their own side, but the borrower deals with a single rate, schedule, and covenant package.
Distressed Debt
Distressed debt investing means buying the existing loans or bonds of companies in serious financial trouble, usually at steep discounts. The buyer aims to profit from a restructuring or, in some cases, to accumulate enough of the debt to convert it into an equity stake and effectively take over the business. Returns can be strong when the company recovers. The risk is real, because a restructured business can slip back into trouble.
Who Borrows and Who Lends
Middle-market companies are the core borrowers. These businesses have outgrown ordinary bank loans but lack the scale to issue public bonds. Private equity firms also lean on private credit to fund acquisitions in their portfolios, because negotiating with a direct lender is faster and more certain than assembling a bank syndicate.
Qualifying for a private loan generally requires stable, predictable cash flow. Lenders size loans against EBITDA (earnings before interest, taxes, depreciation, and amortization), and middle-market deals commonly carry total leverage of 4.5 to 5.5 times annual EBITDA. For smaller or less-established borrowers, the lender may also ask for a personal guarantee from the owners. When the business is an LLC or corporation, the owners are not automatically liable for its debts; a personal guarantee makes them personally responsible if the company cannot repay.
Business Development Companies
Business Development Companies (BDCs) are specialized vehicles Congress created to channel capital toward private businesses. A BDC cannot acquire new assets unless at least 70% of its total asset value is already invested in qualifying holdings, which are mainly securities of private companies or thinly traded public firms bought in private transactions.3Office of the Law Revision Counsel. 15 U.S.C. 80a-54 – Acquisition of Assets by Business Development Companies BDCs have been a significant driver of growth in private credit.1Board of Governors of the Federal Reserve System. Bank Lending to Private Credit: Size, Characteristics, and Financial Stability Implications
To keep their favorable tax treatment as regulated investment companies, BDCs must distribute at least 90% of their investment company taxable income to shareholders each year.4GovInfo. 26 U.S.C. 852 – Taxation of Regulated Investment Companies and Their Shareholders That pass-through structure lets them avoid corporate-level tax, but it also means nearly all earnings flow out as distributions rather than being reinvested.
Private Credit Funds and Other Institutions
Private credit funds are typically structured as limited partnerships that pool capital from institutional investors, including pension plans, endowments, sovereign wealth funds, and family offices. Insurance companies and hedge funds also invest in the space, chasing yields above what government bonds and public corporate debt offer. These lenders operate under lighter regulatory constraints than banks, which gives them room to structure loans flexibly and leaves less public oversight of their lending.
How the Loan Agreements Are Structured
Every private debt deal is negotiated individually, so terms vary. A few features show up in most agreements.
Interest Rates
Most private debt uses floating rates that reset against a benchmark. The Secured Overnight Financing Rate (SOFR) has replaced the now-defunct LIBOR as the dominant U.S. dollar benchmark for these loans.5Federal Reserve Bank of New York. Transition from LIBOR A typical loan is priced as SOFR plus a fixed spread, often in the range of 400 to 600 basis points (4% to 6%). The actual spread depends on the borrower’s creditworthiness, the loan’s seniority, and conditions at the time the deal is struck.
Financial Covenants
Loan agreements include financial covenants, which are ongoing requirements the borrower must meet to avoid default. A common one is a maximum debt-to-EBITDA ratio that caps how much total debt the company can carry against its earnings. A breach lets the lender declare default, accelerate repayment, or renegotiate terms.
Covenant-lite deals, which impose fewer of these financial restrictions, have grown as a share of the market. Lighter terms make private debt more attractive to borrowers and reduce the lender’s ability to step in early when a borrower’s finances slip. Because the agreements are private, their specific terms are not filed with the SEC or disclosed publicly.
Call Protection
Lenders protect their expected returns with call protection provisions, which are penalties the borrower pays for repaying early. The penalties compensate the lender for the interest income lost when a loan is retired ahead of schedule, particularly when the borrower refinances at a lower rate. A common declining schedule charges 3% of the outstanding balance if prepaid in the first year, 2% in the second, 1% in the third, and nothing after that.
Fees for Investors
Private credit funds charge investors two layers of fees. The first is an annual management fee, paid throughout the fund’s life regardless of performance. The second is carried interest, sometimes called a performance fee, which the manager earns only if the fund’s returns exceed a minimum threshold known as the preferred return or hurdle rate. Recent industry data puts typical terms at roughly 1.5% management and 15% carried interest, with preferred returns of 6% to 7%.
Who Can Invest
Most private credit offerings are not registered with the SEC for public sale. They rely on exemptions under Regulation D, which allow issuers to raise capital through private placements without full registration. Issuers must file a Form D notice with the SEC within 15 days after the first sale.6U.S. Securities and Exchange Commission. Exempt Offerings
Under Rule 506(b), the most common exemption, the offering cannot be publicly advertised and sales are limited to no more than 35 non-accredited investors in any 90-day period. Rule 506(c) permits public advertising but restricts sales to accredited investors only and requires the issuer to take reasonable steps to verify each investor’s status.6U.S. Securities and Exchange Commission. Exempt Offerings
To qualify as an accredited investor as an individual, you must have a net worth exceeding $1 million (excluding your primary residence), either individually or with a spouse or partner. The income alternative is earnings above $200,000 individually, or $300,000 with a spouse or partner, in each of the prior two years, with a reasonable expectation of the same in the current year.7U.S. Securities and Exchange Commission. Accredited Investors
For Rule 506(c) offerings, checking a box does not count as verification. Issuers must take objective steps, which can include reviewing tax returns and W-2 forms for income claims, reviewing bank and brokerage statements for net worth claims, or obtaining written confirmation from a registered broker-dealer, investment adviser, licensed attorney, or CPA that the investor qualifies.8U.S. Securities and Exchange Commission. Assessing Accredited Investors under Regulation D
Taxes on Private Debt Investments
Tax treatment depends on how the fund is structured.
Schedule K-1 Reporting
If the fund is a limited partnership or S corporation, you receive a Schedule K-1 each year rather than a 1099. The K-1 reports your share of the fund’s income, deductions, and credits. You owe tax on your allocated share of that income whether or not the fund actually distributes cash to you. If you file on a calendar-year basis but the fund uses a fiscal year, you report the amounts on your return for the year in which the fund’s fiscal year ends.9Internal Revenue Service. Shareholder’s Instructions for Schedule K-1 (Form 1120-S)
BDC Distributions
BDC distributions are generally taxed as ordinary income at your regular rate, which can reach 37% depending on your bracket. Most BDC dividends do not qualify for the lower capital gains rates that apply to qualified dividends from many publicly traded stocks. Because BDCs must distribute nearly all their income, most of your return arrives as fully taxable distributions.
Retirement Accounts and UBTI
Holding private debt in a self-directed IRA does not automatically shield the income from tax. If the fund uses leverage, it can generate unrelated business taxable income (UBTI). When gross UBTI exceeds $1,000, the retirement account must file Form 990-T and pay tax on it. The filing burden falls on the IRA owner, not the custodian, and any tax owed must be paid from the retirement account rather than personal funds. IRAs are taxed at trust rates, which reach the top 37% federal bracket much faster than individual rates do.
Liquidity Restrictions
Private debt is illiquid. You generally cannot sell your position when you want to, and the specifics depend on the fund type.
Traditional private credit funds lock up capital for a set period, usually five to ten years. Senior debt funds tend toward five to eight years; mezzanine and distressed strategies may run eight to ten. During the lock-up, your access to invested capital is limited to whatever current interest payments the fund distributes.
Interval funds are a semi-liquid variant that lets investors redeem a limited percentage of shares at set intervals, commonly 5% of outstanding shares per quarter. Even in this more liquid structure, fully exiting a position can take years.
A small secondary market exists for selling private credit fund interests before lock-up expires, but trades are infrequent and typically clear at discounts of 5% to 15% below the face value of the holdings. Fewer than 1% of private credit assets under management traded on the secondary market in 2024, so finding a buyer at any price is not guaranteed.
Key Risks
Private debt pays higher yields than most publicly traded fixed-income investments, and the risks that come with it are worth weighing carefully.
- Credit risk. Borrowers can default. Private credit default rates move with the economy; the rate was 2.46% in the fourth quarter of 2025, up from 1.76% earlier that year. A single default in a concentrated portfolio can noticeably move returns.
- Illiquidity risk. Capital is locked up for years. If your circumstances change, exit options are limited and often expensive.
- Valuation opacity. These loans do not trade on public markets, so there is no independent price. Fund managers estimate values through internal models, and the reported value of your investment may not match what it would sell for.
- Limited regulatory protection. Private credit funds operate under lighter regulation than banks or public bond markets, and public disclosures and filings are generally not available, which makes it harder to gauge a fund’s true risk before investing.1Board of Governors of the Federal Reserve System. Bank Lending to Private Credit: Size, Characteristics, and Financial Stability Implications
- Interest rate sensitivity. Floating rates protect lenders when rates rise, but the same increase raises the borrower’s debt payments and can push a stretched company closer to default.