What are private credit funds and how do they work?

A bank may take months to syndicate a loan, require a narrower underwriting box, or simply have no appetite for a business with uneven earnings. Private credit funds exist to step into that gap.

So, what are private credit funds? They are non-bank investment vehicles that pool institutional capital and lend it directly to companies through privately negotiated loans. In return, investors receive interest income, upfront fees, and sometimes equity-like upside through warrants or payment-in-kind interest. The loans do not trade on a public exchange. The lender, borrower, sponsor, and lawyers sit around the same underwriting file and negotiate the structure line by line.

That practical control is why private credit has grown so quickly. The market was estimated at roughly $1.75 trillion to $2.1 trillion in 2025 and is projected to reach about $1.96 trillion in 2026. But scale has brought a harder operating environment with it: US private-credit defaults reached 6.0% in April and May 2026, a record in Fitch's tracking.

The asset class is not a machine that converts illiquidity into effortless yield. It is lending against real businesses, with real payrolls, inventory turns, customer churn, steel in the ground, and occasionally very little room for error.

The mechanics: capital becomes a loan, then a claim on cash flow

The private credit fund definition is simple at a high level: a manager raises capital from pensions, insurers, endowments, family offices, and other long-term investors, then deploys that capital into loans that banks or public bond markets do not provide on acceptable terms.

In practice, the private debt fund structure is more deliberate than that sentence suggests.

A fund manager will typically raise commitments rather than all-cash subscriptions on day one. When it identifies a loan, it calls capital from investors and combines it, where permitted, with a subscription line or fund-level financing. The manager then originates a loan directly to a borrower, often a company owned by a private-equity sponsor.

The borrower pays a floating-rate coupon, usually set as a base rate plus a credit spread. It may also pay:

• an original issue discount or upfront fee when the loan closes;
• an exit fee when the debt is refinanced or repaid;
• commitment fees on undrawn revolving capacity;
• amendment fees if a covenant is reset, maturity extended, or collateral package changed;
• payment-in-kind interest, where interest is added to principal rather than paid in cash.

The fund passes the economic results through to its investors after management fees, fund expenses, and carried interest. Its return is therefore built from more than the headline coupon. It is a combination of cash interest, fees, principal repayment, losses, workout costs, and the timing of every one of those items.

A private credit manager usually holds the loan through maturity. That changes the temperament of underwriting. In a broadly syndicated loan, a lender may assume it can sell paper into a liquid secondary market. In direct lending, the lender needs to assume it will still be in the capital structure when a customer contract fails, a new warehouse opens late, or raw-material costs jump.

A private credit fund does not merely price a loan. It accepts responsibility for living with the asset after the closing dinner is over.

That is the central trade-off. The fund can move faster than a bank and tailor the debt to the company's physical and commercial reality. In exchange, the investor gives up daily liquidity and accepts that valuations are periodic and model-driven rather than continuously marked by a public market.

Why non-bank lenders have taken so much ground

Direct lending funds explained in one phrase: they are the primary financing desk for a growing share of middle-market buyouts and refinancings.

Direct lending accounted for approximately 65.85% of the private credit market in 2025. The reason is not mysterious. Private-equity buyers often want one lender or a small club of lenders that can deliver a committed cheque, manage diligence confidentially, and avoid the uncertainty of launching a broadly syndicated market.

For a borrower, a unitranche facility can replace several layers of capital with one agreement. Instead of separately arranging senior debt and junior debt, the company takes a single loan with one borrower-facing rate and one set of documents. Behind the scenes, lenders may divide the economics through an agreement among themselves, but the company has a cleaner stack to manage.

For the sponsor, this can be useful when buying a business with tangible expansion needs: a regional logistics operator adding depots, a specialty manufacturer installing a production line, or a data-services company building out leased technical capacity. The financing can be shaped around seasonal working capital, capital-expenditure ramps, or delayed draw needs.

The practical differences are visible in the loan documents.

This flexibility is valuable, but it is not free. A borrower may accept a higher all-in cost because it is buying certainty and speed. A fund investor accepts a multiyear lock-up because the manager needs time to originate, monitor, amend, and exit loans without being forced to sell at the wrong moment.

The market has also become concentrated. The five largest managers—Apollo, Ares, Blackstone, Brookfield, and Carlyle—collectively held about 42% market share in 2025, with Ares above 13%. That concentration matters because large managers can offer borrowers sizeable hold commitments, global origination reach, and follow-on capital when a deal becomes complicated.

It also means the market is developing more like physical infrastructure: a handful of large platforms own the broadest networks, while smaller specialists need a very clear lane. A manager focused on software recurring revenue, asset-backed finance, healthcare receivables, or lower-middle-market industrials can still thrive. But it cannot pretend that scale is irrelevant when a borrower needs a single lender to write a very large cheque.

The capital stack is where the return—and the pain—sits

Not all private credit takes the same place in a company's capital structure. The difference between a first-lien loan and mezzanine debt is not a technical footnote; it determines who gets paid first when the building is on fire.

A typical private-credit transaction may include senior secured debt, junior or subordinated debt, and equity beneath it. Each layer has a different claim on the borrower's assets and cash flow.

Direct lending and first-lien loans

Senior direct lending is the engine room of private credit. The fund lends against the business's assets, contracts, intellectual property, or enterprise value and takes a first-priority claim on collateral.

In a well-built deal, the lender is not relying on a spreadsheet alone. It is looking at the machinery on the factory floor, the renewal profile of customer contracts, concentration in the receivables ledger, maintenance capex, inventory obsolescence, lease obligations, and how quickly cash converts after an invoice is issued.

A first-lien position does not eliminate loss risk, but it provides a better place to stand if the borrower stumbles. Historical recovery rates for first-lien senior loans have averaged roughly 60% to 75% in default scenarios, considerably stronger than subordinated capital.

Unitranche lending

A unitranche loan combines senior and subordinated economics into one borrower-facing facility. For the lender, it provides a larger share of the capital structure and potentially a higher yield. For the borrower, it removes intercreditor complexity from the day-to-day relationship.

Unitranche yields stabilized between 9.00% and 9.75% in the second quarter of 2026. That is about 250 basis points below the late-2023 peak. The decline is a reminder that private credit pricing moves with competition, base rates, deal quality, and the amount of capital chasing a finite supply of borrowers.

Yield compression is not automatically bad news. A lower coupon on a loan to a genuinely durable business may produce a better outcome than a double-digit yield on a borrower that has no practical route through its next refinancing. The question is whether the spread still compensates for leverage, illiquidity, and the work required if the loan needs attention.

Mezzanine debt

Mezzanine financing sits below senior debt and above equity. It may include a higher cash coupon, payment-in-kind interest, warrants, or other equity participation. It is designed for situations where the company needs more capital than senior lenders are willing to provide, but the equity sponsor does not want to write the entire incremental cheque.

That position comes with a harsher recovery profile. Mezzanine debt has historically produced average recoveries of around 20% to 40% in default, compared with 60% to 75% for first-lien senior loans.

This is why a manager should never describe a 13% or 14% mezzanine return as simply "more yield." Some of that yield is payment for sitting lower in the structure, with fewer assets between the lender and the equity cushion disappearing.

The spread is not a bonus attached to the loan. It is the price of the floor beneath you being thinner.

Defaults are rising, and restructurings tell the more useful story

The 6.0% US private-credit default rate recorded in April and May 2026 is the headline number. But the shape of those defaults matters as much as the total.

Around 65% of private-credit defaults in 2025 were distressed restructurings such as coercive debt exchanges and maturity extensions agreed under pressure. In other words, many troubled loans did not move directly from current payments to a clean bankruptcy filing and a liquidation sale. They entered a long corridor of amendments, negotiations, fresh liquidity, and revised ownership arrangements.

That is often the right outcome. A business with a sound product, useful facilities, and temporary earnings pressure may need time rather than a fire sale. A lender that understands the operating asset can preserve more value by extending a maturity, funding a tightly controlled capex programme, or taking additional collateral.

But restructuring can also become a way of postponing recognition. A loan that is amended repeatedly should not be treated as healthy simply because cash interest is still arriving.

The underwriting questions become more physical and specific when a credit begins to weaken:

1. Is the revenue problem temporary or structural? A manufacturer losing margin because freight costs spiked is different from one whose main product has been displaced.

2. What cash flow is truly available after maintenance capex? Deferred repairs, worn equipment, and understaffed operations can make reported EBITDA look sturdier than it is.

3. How saleable is the collateral? A generic warehouse in a deep logistics market is not the same as a highly customized facility with one narrow use.

4. Who controls the next dollar of liquidity? Working-capital swings can consume a rescue financing faster than a model suggests.

5. Does the sponsor have both the incentive and capacity to support the business? A sponsor's willingness to inject equity often changes the entire negotiation.

Operational diligence increasingly includes resilience questions that used to sit outside the credit memo. Climate stress, supply disruption, and workforce availability each leave a mark on throughput, inventory, and unit cost. A warehouse operator absorbing a summer heatwave has to think about hydration, shift design, cooling capacity, and contingency planning—small operational details that turn material the moment they interrupt fulfilment. The same logic applies inside a manufacturing plant running near capacity, a logistics yard managing peak season volumes, or a fleet operation with vehicles idling in extreme temperatures. Physical resilience is part of the credit story, not an extracurricular consideration.

That is the boots-on-the-ground reality behind a covenant package. A lender cannot recover the value that was never maintained in the first place.

Covenant-lite lending shifts more of the burden to the lender

Covenants are the lender's early-warning system. They can require a borrower to maintain leverage or interest-coverage ratios, limit additional debt, restrict asset sales, control distributions, or provide reporting on a regular schedule.

The share of covenant-lite transactions in direct lending rose to 21% in 2025 from just 4% in 2023. This does not mean every covenant-lite deal is reckless. Strong borrowers with stable cash flows may reasonably negotiate more flexibility. Nor are all maintenance covenants equally protective; a poorly set covenant can provide little real warning.

Still, the direction matters.

When the lender has fewer triggers to intervene early, it may discover stress later, after liquidity has been consumed and negotiating leverage has shifted. That can turn a manageable operating issue into a more expensive restructuring.

A disciplined private credit manager compensates in other ways:

• It underwrites downside cash flow rather than the sponsor's base-case growth plan.
• It tests how the business performs if rates stay elevated, volumes flatten, or a large customer leaves.
• It insists on reporting that shows cash, working capital, capex, and borrowing-base movements in enough detail to detect friction.
• It sizes leverage with the cost of maintaining the physical asset in mind, not only the EBITDA multiple.
• It keeps reserves for follow-on funding where a good asset may need additional capital to reach the other side of a downturn.

The best lenders are not those that never see a problem loan. In a market this large and competitive, that is not a credible standard. They are the lenders that identify deterioration early, have documentation that gives them practical options, and understand which costs can be cut without damaging the asset they are trying to protect.

Recovery dynamics: senior loans versus subordinated debt

When a credit goes wrong, the legal documents meet the physical world. The question is no longer whether the model was elegant; it is who gets paid, in what order, and how much value is actually left.

In a typical workout, secured creditors control the timeline. A first-lien lender can usually accelerate, enforce on collateral, and propose a restructuring plan. Subordinated creditors enter later and depend on whatever residual value sits beneath the senior claims.

The numerical difference in outcomes is stark.

These ranges are not promises. They are historical averages that depend on the asset class, the industry, the speed of enforcement, and whether the lender chooses to support a turnaround or accelerate. A slow, well-managed restructuring in a stable industry can produce senior recoveries at the upper end of the range. A disorderly liquidation in a cyclical industry can pull every position lower.

Several practical variables drive where recoveries land:

• Quality and specificity of collateral. A loan secured against diversified receivables, well-maintained equipment, and clean title is easier to monetise than one backed by customised, single-use assets.
• Maintenance discipline before default. The business that deferred capex leaves the lender with a lower recovery base.
• Jurisdiction and enforcement speed. Some legal regimes resolve restructurings in months; others take years, and time itself destroys value.
• Sponsor behaviour. A sponsor willing to fund a turnaround changes the negotiation. A sponsor that disappears into litigation does not.
• Market backdrop at exit. Selling a business, refinancing, or finding a replacement lender is easier in a benign credit market than a frozen one.

The practical lesson is that position in the stack is not a small adjustment to yield. A 300 basis point spread difference between senior and mezzanine paper can look modest against a 30-point swing in ultimate recovery. The arithmetic of returns changes once losses are applied.

That is also why senior lenders increasingly ask for what used to be mezzanine protections: tighter reporting, blocker provisions on dividends, and more visibility into working capital. Documentation has migrated up the stack to compensate for weaker covenant enforcement elsewhere.

Private credit is becoming a permanent financing channel, not a temporary substitute

Private credit grew because it solved a real financing bottleneck: companies and sponsors wanted certainty, flexibility, and a lender willing to underwrite situations that did not fit a bank's standardized box.

That need is not going away. Infrastructure-heavy businesses will keep requiring expansion capital. Middle-market companies will keep needing acquisition financing, working-capital support, and refinancing solutions. Banks will remain essential, but they will not serve every part of the market with the same appetite or speed.

The next phase will be less about declaring private credit an alternative to banks and more about judging the quality of its construction. A well-built private debt fund structure matches long-duration capital to long-duration loans, embeds operational diligence into underwriting, and staffs workout capability before defaults arrive rather than after. A poorly built one packages illiquidity into a yield story and assumes the credit cycle will be polite.

The managers that did the harder work—onboarding engineers and operating partners into diligence, building restructuring teams in advance of stress, and writing documentation that holds up under pressure—are likely to be the ones that preserve capital and reputation through the cycle. Those that scaled fastest on the way up may discover that lending is easier than being a lender.

For investors, the question is no longer simply what are private credit funds. It is which managers have built lending machines that work when the loans themselves stop working. For borrowers, it is which lenders can move at the speed of a deal and stay engaged when the underlying business bends.

That is the version of private credit worth watching.