How it works
Lenders use accrual accounting. If a borrower owes 10% a year on a loan, the lender books that interest as income as it accrues, day by day, whether or not any cash has actually turned up. This is normal and sensible: most borrowers pay, and matching income to the period it was earned in is what accounting is for.
It stops being sensible the moment the borrower is not going to pay. So there is a rule. When collection of principal or interest is in doubt — for banks, conventionally once a payment is ninety days past due, though judgement can get you there sooner — the lender must put the loan on non-accrual. Two things then happen. Future interest stops being recognised as income at all, and interest already accrued but never received is reversed, taken back out of income in the quarter the decision is made. After that the lender books only cash it actually receives, if any.
A worked illustration with invented round numbers: a fund holds a $100m loan at 10%, booking $2.5m of interest income a quarter. The borrower misses two payments. The fund puts the loan on non-accrual and reverses the $5m it had already booked and not collected. That quarter's income takes a $7.5m hit, the $5m reversal plus the $2.5m it no longer gets to book. Nothing about the borrower changed on the day of the decision. The accounting caught up with it.
Two refinements matter for reading the disclosures. Funds report non-accruals both at cost (what they originally lent) and at fair value (what they now say the loan is worth), and the two can differ a lot, because writing the loan down shrinks its contribution to the fair-value figure. At Blue Owl Capital Corporation, non-accruals were 2.8% at cost but 0.8% at fair value in the second quarter of 2026, which is the fund telling you it has already taken most of the loss. We walked through that on 20 August.
The second refinement is that non-accrual is a lagging and partly discretionary call. The manager decides when doubt becomes reasonable doubt, and there are legitimate ways to postpone the moment: amend the loan, extend the maturity, or let the borrower pay interest in kind by adding it to the principal. income was around 10.7% of Blue Owl's BDC investment income in the same period. PIK is, among other things, how a stressed loan avoids becoming a non-accrual.
Why it matters to this crash
In , the loans do not trade. There is no price. The fair value of the book is an estimate produced by the manager whose fee depends on it. Non-accrual is the one line that resists that: a formal admission, made in a filing, that money owed is not arriving. That is why we keep coming back to it.
The number moved fast. Across the twenty largest listed the median share of loans on non-accrual rose from 2.0% of cost at the end of March 2026 to 2.8% at the end of June, the highest reading since 2017, on the FT's analysis of Solve data (FT). An 80 basis point in the median in a single quarter is not one bad credit at one fund. It is the middle of the distribution shifting. FS KKR reported 7.1% of its book troubled. Fitch recorded a record month for private credit defaults in July. Golub Capital's David Golub told investors: "We're in a credit cycle. Others denied it for a while. I don't think there's a lot of denial any more." We wrote this up on 19 August.
The mechanical consequence is dividends. A BDC distributes almost all of its net investment income. Non-accruals come straight out of that income, and they arrive alongside a shrinking loan book — repayments outran new commitments at vehicles run by KKR, Blue Owl and Apollo's MidCap Financial. Meanwhile the equity market has spent the same period marking the managers up, because managers earn on assets gathered rather than on loans repaid. We named that disagreement on 19 August.
What would make this dangerous
A third consecutive quarterly increase in the median, taking it decisively through 3% of cost, would end the argument that the second quarter was a catch-up. Watch the gap between the cost figure and the fair-value figure too: if non-accruals at fair value start rising toward the cost number rather than sitting far below it, the write-downs are not keeping pace with the deterioration.
Watch PIK income as a share of investment income at the same funds. Rising PIK alongside rising non-accruals means the reported non-accrual rate is being held down by borrowers who have been allowed to stop paying cash without being labelled as such.
And watch dividend coverage. Non-accruals hurt income before they hurt , and a BDC that cuts its distribution is a BDC admitting the loss in the one currency its retail holders actually track. That is also the point at which redemption queues stop being an abstraction — we covered the 12.4% of NAV requested from non-traded BDCs in the second quarter, of which only 38% was met.