A business development company (BDC) can advertise a double-digit distribution yield while paying out more cash than it reliably earns from interest and dividends. Distribution coverage asks a simple question: is the payout supported by net investment income (NII) (and sometimes realized gains), or is part of the check funded by return of capital, portfolio sales, or an unsustainable stretch? Headline yield alone does not answer that.
This guide deepens the coverage idea introduced in BDC basics. Beginner framing: Investing basics for beginners. Tax character cousins: Preferred stock dividend tax basics.
Coverage in plain English
| Concept | What it usually means for a BDC |
|---|---|
| Net investment income (NII) | Interest and other investment income minus expenses and interest on borrowings |
| Distribution | Cash (or stock) paid to shareholders on a stated schedule |
| Coverage ratio | Roughly NII (sometimes NII + realized gains) ÷ distributions over the same period |
| Under-coverage | Paying out more than earned—may signal ROC, NAV pressure, or a coming cut |
| Over-coverage | Earning more than paid—room to maintain or grow the distribution if credit holds |
Sponsors and managers in the listed BDC space (Ares, Blackstone credit platforms, Golub, Main Street, and others) report NII and distributions in shareholder reports and SEC filings. Always use the specific issuer’s definitions—some highlight “adjusted NII” that adds back items you should understand before trusting the ratio.
Why high yields can be partly unearned
- Credit stress. Non-accruals and restructurings cut interest income while the board keeps the distribution for optics.
- Leverage and rate squeeze. Funding costs rise faster than asset yields; NII falls before the payout does.
- Fee stack. Management and incentive fees reduce what reaches shareholders—compare the drag the way you would an expense ratio.
- Return of capital (ROC). Part of the distribution may be classified as nontaxable ROC on Form 1099-DIV; economically that is often your own basis coming back, not “income.”
- NAV erosion. Persistent under-coverage plus credit losses can grind NAV even while the yield screenshot still looks attractive (NAV vs market price premiums).
Holding an under-covered BDC in a taxable brokerage account can mean ordinary-income tax on the taxable slice of distributions while principal quietly shrinks.
Worked example: 12% yield vs 85% coverage
Morgan sees a listed BDC at Fidelity yielding 12% on a $25,000 position ($3,000/year if the rate holds). The latest shareholder report shows annualized NII covering only ~85% of distributions. Roughly $450 of that $3,000 is not earned by current NII (illustrative). Over a year, if that gap continues without realized gains to fill it, NAV can drift lower even if the board holds the payout.
Morgan also sits in a 24% federal bracket. If most of the taxable distribution is ordinary, federal tax on a full $3,000 ordinary dividend is about $720—leaving ~$2,280 after tax (~9.1%) before counting any NAV decline. If NAV falls 8% in the same year, the “income sleeve” lost more in mark-to-market than it paid in cash. Lesson: pair yield with coverage and NAV trend—not yield alone. Treat BDCs as credit risk, not a CD at Ally or Capital One.
What to read in filings
- NII vs distributions for several quarters—not one cherry-picked period.
- Non-accrual loans and watch-list commentary in the 10-K/10-Q.
- Leverage and asset-coverage trends; rising leverage with flat coverage is a yellow flag.
- 1099 tax character history: ordinary vs qualified vs ROC.
- Spillover income or undistributed NII that can support a temporary gap—or the absence of it.
Practical checklist
- Compute or locate a multi-quarter coverage ratio before chasing the highest yield screen.
- Read non-accruals and credit commentary, not just the distribution press release.
- Check whether “adjusted NII” removes costs you still pay economically.
- Review prior 1099s for ROC and ordinary-income weight.
- Size BDCs as a satellite credit sleeve; do not fund near-term cash needs with under-covered yield.
- Confirm with a CPA/EA or fiduciary advisor when amounts are material.
Educational only. Not investment, tax, or legal advice. BDC accounting labels, coverage definitions, and tax character vary by issuer and year. Read prospectuses and SEC filings; consider a qualified professional before buying.