The 300% Asset Coverage Test: The Leverage Rule Behind Every BDC and Interval Fund

TL;DR: The asset coverage test is the single most important leverage constraint you will find in a business development company (BDC) or interval fund prospectus. Under Section 18 of the Investment Company Act of 1940 (the "1940 Act"), a registered closed-end fund must hold at least $3 of total assets for every $1 of debt it issues. That is the 300% asset coverage requirement. BDCs, which are a specialized form of closed-end fund that lend to small and mid-size businesses, historically operated under a 200% standard, and since 2018 can elect to drop to 150% with proper approvals. Those percentages translate directly into how much leverage a fund can run and how much risk lands in your account when markets move against it.

What the Asset Coverage Test Actually Measures

The term "asset coverage" has a precise statutory definition. Section 18(h) of the 1940 Act defines it as the ratio of a fund's total assets (after subtracting all liabilities except the senior securities themselves) to the aggregate amount of those senior securities. "Senior securities" are debt instruments and preferred stock that hold a legal claim on the fund's assets before common shareholders get paid.

In plain arithmetic: a fund with $300 million in total assets and $100 million in senior debt has an asset coverage ratio of 300%. That is the statutory floor for traditional closed-end funds. The math works in reverse: a 300% coverage requirement means debt can never exceed one-third of total assets, or a debt-to-equity ratio at or below 1-to-2.

The table below shows exactly how the three relevant thresholds translate into real dollars:

Coverage Standard	Who It Applies To	Max Debt per $100 of Equity	Total Assets per $100 of Equity	Effective Debt-to-Equity
300% (debt)	Registered closed-end funds, interval funds	$50	$150	0.5x
200% (debt)	BDCs (pre-2018 default; still the fallback)	$100	$200	1.0x
150% (debt)	BDCs that have elected the reduced standard	$200	$300	2.0x
200% (preferred stock)	Closed-end funds issuing preferred shares	N/A (preferred)	$200 total assets per $100 of preferred	1.0x (preferred vs. common)

Notice that the 300% standard for senior debt, despite sounding like a lot of cushion, still permits meaningful leverage. A fund with $100 of equity can layer in $50 of debt and deploy $150 total into its portfolio. That amplifies returns when assets appreciate and amplifies losses when they do not.

Why Congress Built This Test Into the 1940 Act

The 1940 Act did not arrive in a vacuum. By the mid-1930s, the SEC had completed the Investment Trust Study, which documented widespread abuse in the investment company industry. Investment companies before 1940 "often issued debt securities without adequate assets and reserves," and "excessive leverage often led investment companies to make risky investments to produce the income needed to cover their obligations." That behavior destroyed capital for shareholders, particularly retail investors who did not understand the leverage embedded in what they owned.

Congress responded by writing Section 18 into the 1940 Act. As a University of Michigan Business and Entrepreneurial Law Review analysis put it, leveraging "without any significant limitation was identified as one of the major abuses of investment companies prior to the passage of the Act." The 300% floor for closed-end fund debt was the compromise that Congress, the SEC, and the industry negotiated.

Section 18(a)(1) of the 1940 Act spells out two key prohibitions. A closed-end fund cannot issue senior debt unless it will have at least 300% asset coverage immediately after the issuance. A fund also cannot declare any dividend or buy back stock unless asset coverage remains at least 300% after the payment. That second prohibition is the enforcement mechanism. It links the fund's ability to pay income to shareholders directly to whether the fund is keeping debt within bounds.

The 2018 Rule Change That Reshaped BDC Leverage

BDCs are registered closed-end investment companies that invest primarily in the debt and equity of private, U.S.-based middle-market companies. Congress created the BDC structure in 1980. The BDC-specific leverage rule, codified in Section 61(a) of the 1940 Act (15 U.S.C. § 80a-60), historically set BDC asset coverage at 200%, more permissive than the 300% standard for ordinary closed-end funds, but still a 1-to-1 debt-to-equity cap.

On March 23, 2018, President Trump signed the Consolidated Appropriations Act, which included the Small Business Credit Availability Act (SBCAA). The SBCAA amended Section 61(a) to add a second option: BDCs may reduce their asset coverage floor to 150% (approximately a 2-to-1 debt-to-equity ratio) if they follow a defined approval and disclosure process.

The mechanics of opting in matter. A BDC that wants the lower 150% threshold must either obtain approval from a "required majority" of its independent board directors (with the change taking effect one year after board approval) or obtain approval from a majority of its shareholders at a meeting (in which case the change can take effect the day after the shareholder vote). Either path requires the BDC to disclose the approval, the effective date, and the current asset coverage percentage in a Form 8-K filing and on the fund's website. The fund must then include asset coverage disclosures in every quarterly and annual SEC filing.

As Proskauer Rose explained in its 2018 client alert on the SBCAA: "A BDC with $100 in equity could borrow up to $100 [under prior law]. The SBCAA amended Section 61(a) to add provisions permitting a BDC to reduce its asset coverage from 200% to 150%. As a result, a BDC with $100 in equity will now be able to borrow up to $200, effectively doubling its leverage." That is a material change to the risk profile of any BDC that exercises the option.

For non-listed private BDCs, there is an additional condition: the fund must offer to repurchase shares held by existing shareholders as of the approval date, with 25% of the repurchase amount available each quarter for one year. Those investors bought shares under a different leverage assumption, and the law gives them an exit option before the higher leverage kicks in.

Two Live Examples: Apollo Debt Solutions and UBS Credit Income Opportunities

Apollo Debt Solutions BDC is a non-traded, private BDC managed by Apollo Global Management. On July 22, 2021, its sole shareholder approved the adoption of the 150% asset coverage threshold under Section 61(a)(2). Apollo Debt Solutions discloses in its annual report on Form 10-K that it may issue multiple classes of debt as long as asset coverage equals at least 150% immediately after each issuance, and that while senior securities remain outstanding, it cannot pay dividends or buy back shares unless asset coverage meets the applicable ratio at the time of the distribution. That prohibition flows directly from Section 18(a)(1)(B) of the 1940 Act.

The UBS Asset Management Credit Income Opportunities Fund takes a different path. Organized in mid-2026 as a Delaware statutory trust, it operates as a non-diversified, closed-end interval fund under Rule 23c-3, not as a BDC. Because it did not elect BDC status, Section 61(a) does not apply. According to SQX Alts, the fund plans to use leverage opportunistically within the 1940 Act's 300% asset coverage limit, with a credit facility expected in its first year and potential use of reverse repurchase agreements and preferred shares. That 300% ceiling is the standard Section 18(a)(1)(A) constraint, exactly what Congress wrote in 1940.

BDC structure gives you access to the 150% floor and correspondingly higher leverage capacity. Interval fund structure keeps you at the 300% standard with lower maximum leverage but the same underlying investor-protection logic.

What Higher Leverage Means for You as an Investor

Leverage amplifies outcomes in both directions. Marketing materials for income-focused alternative funds often emphasize yield and understate the NAV (net asset value) risk that comes with borrowed money. I want to put numbers on that risk directly.

Consider a BDC with $200 million in total assets: $100 million of equity and $100 million of debt, sitting at exactly 200% asset coverage. If the loan portfolio declines 15% in value, total assets fall to $170 million. Debt stays at $100 million because the fund still owes it. Equity drops from $100 million to $70 million, a 30% NAV decline on a 15% portfolio loss.

Now apply the 150% standard. The same fund runs $200 million of debt against $100 million of equity, putting total assets at $300 million. A 15% portfolio decline drops total assets to $255 million. Equity falls from $100 million to $55 million, a 45% NAV decline on the same 15% loss. Know the leverage ratio of any fund you buy before you buy it.

A second risk does not show up in NAV math: forced selling. A BDC near its asset coverage floor may have to sell portfolio loans at depressed prices to raise cash and restore compliance, precisely when the secondary market for those loans is worst. McDermott Will and Emery flagged this dynamic in their 2018 SBCAA analysis, noting that increased leverage capacity may push BDCs toward lower-yielding liquid credit instruments that carry their own market-price risk under stress.

How to Find a Fund's Asset Coverage Ratio in Its SEC Filings

Every BDC and closed-end fund that has issued senior securities must report its asset coverage ratio in each periodic SEC filing. Here is where to find it.

For publicly traded BDCs, go to the SEC's EDGAR database at sec.gov/edgar and search by the fund's name or ticker. Pull the most recent Form 10-Q (quarterly) or Form 10-K (annual). Search the filing for "asset coverage," "senior securities," or "coverage ratio." You will find a required table showing the aggregate outstanding principal amount of senior securities and the asset coverage percentage as of the financial statement date.

For non-traded BDCs and interval funds, the same Form 10-K and Form 10-Q filings exist on EDGAR. The fund's website must also post notice of any asset coverage election and its effective date. If a fund claims to have elected the 150% standard, look for the Form 8-K filing disclosing the approval and the corresponding website notice. Both are mandatory under the statute.

A practical rule of thumb: if a fund's reported ratio sits within 20 to 30 percentage points of its floor, ask questions. A BDC at 155% coverage with a 150% floor has almost no cushion. Kayne Anderson BDC, for example, discloses in its Form 10-K that it targets asset coverage of 200% to 180%, well above its 150% floor, as a risk management buffer. I view that kind of internal target as a sign of disciplined capital management.

Frequently Asked Questions

Does the 300% asset coverage requirement apply to mutual funds?

Partially. Section 18(f) of the 1940 Act does apply a 300% standard to open-end funds (mutual funds), but only for bank borrowings, and mutual funds generally cannot issue senior securities such as bonds or notes. In practice, mutual funds carry little or no leverage compared with closed-end funds and BDCs. The 300% discussion in this article primarily concerns registered closed-end funds and interval funds.

If a BDC drops below its asset coverage floor, what happens?

Several consequences follow automatically. The fund cannot issue any additional senior securities until it returns to compliance. It also cannot pay dividends on common stock or repurchase shares. If coverage on a debt class falls below 100% for 12 consecutive months, holders of that debt class gain the right to elect at least a majority of the fund's board. A 24-consecutive-month breach below 100% triggers an event of default. Most BDCs draw on credit covenants and portfolio sales to avoid those thresholds, but the statutory consequences are severe.

Can a BDC reverse its election to operate at 150% and return to 200%?

Yes. A BDC that elected the 150% standard under Section 61(a)(2) can return to the 200% standard. The statute does not impose a minimum holding period for the lower standard. However, the BDC would need to reduce its outstanding senior securities to comply with the higher 200% threshold if its current leverage exceeds what 200% coverage permits. For a heavily leveraged BDC, that means paying down debt or raising equity, neither of which is without cost.

Is asset coverage the same as a debt-to-equity ratio?

They measure the same underlying reality from different angles, but the numbers do not convert directly without adjustment. Asset coverage compares total assets (net of non-senior liabilities) to senior securities. Debt-to-equity compares debt to net asset value (total assets minus all liabilities). A 300% asset coverage corresponds to a 0.5x debt-to-equity ratio. A 200% coverage corresponds to 1.0x, and a 150% coverage corresponds to 2.0x. The Proskauer Rose 2018 SBCAA alert contains this exact conversion table. When you read a BDC pitch deck that uses debt-to-equity language, translate it back to asset coverage using those ratios to understand which regulatory threshold the fund is operating near.

Author Disclosure: Jeff Barnes, MBA has no personal position in any company, fund, or platform named in this article. Angel Investors Network has no current commercial relationship with any party mentioned. AIN provides marketing and education services, not investment advice. Past performance does not guarantee future results. All investments involve risk, including loss of principal.