The CLO Payment Waterfall: Step-by-Step

Last reviewed on May 10, 2026.

Every CLO payment date triggers two parallel cash-flow priorities: an interest waterfall, which distributes the interest collected from the underlying loans, and a principal waterfall, which distributes principal proceeds. The rules are written line by line in the indenture and executed by the trustee. Understanding the waterfall is the difference between knowing what the tranches are and knowing what each tranche actually receives in any given period.

Where the Cash Comes From

Between payment dates the trustee’s collection account fills up with two kinds of money:

• Interest proceeds. Coupon payments on the underlying loans, plus interest earned on cash balances and on hedging gains.
• Principal proceeds. Loan amortization, prepayments, refinancing repayments at par, recoveries on defaulted loans, and during the reinvestment period, sale proceeds where they are designated as principal.

On the payment date, those two pots are paid down in two separate sequences. They never mix in normal operation. They can interact only through the failure of an overcollateralization or interest-coverage test, which redirects what would have been junior interest payments into senior principal repayment. That redirection is the structural feature that makes AAA tranches as resilient as they are.

The Interest Waterfall, Step by Step

A typical broadly syndicated CLO interest waterfall looks like the sequence below. Numbering and exact thresholds vary by deal; the order rarely does.

1. Senior administrative fees. Trustee, collateral administrator, rating agency surveillance, accountant fees, and other senior expenses. Usually capped at a small fixed dollar amount per period.
2. Senior management fee. Typically 15–20 bps annually on collateral par, paid monthly. This is the manager’s base, paid above all rated tranches.
3. AAA interest. Coupon on the AAA tranche, almost always SOFR plus a fixed spread. AAA always gets paid before AA in the interest waterfall.
4. AA interest.
5. Senior coverage tests (AAA / AA OC and IC). If passing, continue. If failing, divert remaining interest to redeem AAA principal until the tests cure. Junior tranches receive no further interest until the senior tests pass.
6. A interest.
7. BBB interest.
8. Mezzanine coverage tests (A / BBB OC and IC). Same logic, applied at the mezzanine level. Failure redirects cash to AAA principal redemption first, then AA, then A, then BBB, in order.
9. BB interest.
10. B interest (where present).
11. Junior coverage tests (BB OC). Failure typically diverts equity residual to BB principal.
12. Subordinated management fee. A second slice of management fee, typically 30–40 bps, paid only after rated-tranche interest. This is part of how managers’ incentives are aligned with rated investors.
13. Reinvestment OC test (interest reinvestment overcollateralization, or similar). A separate test that, on failure, can divert residual to either reinvest in additional collateral or pay down senior debt, depending on the indenture.
14. Equity incentive fee hurdle. If equity has hit a stated cumulative IRR threshold, a portion of remaining residual is paid to the manager as an incentive fee.
15. Equity residual. Whatever is left after all of the above is distributed to the holders of the subordinated (equity) notes.

The Principal Waterfall, Step by Step

The principal waterfall is shorter but its consequences are more visible. During the reinvestment period most principal proceeds are not distributed at all — they are reinvested into new loans, subject to the indenture’s reinvestment criteria. Outside the reinvestment period, the typical sequence is:

1. Senior fees and administrative shortfalls if the interest waterfall did not cover them.
2. Senior management-fee shortfalls.
3. AAA interest shortfalls from the interest waterfall.
4. AAA principal, sequentially, until paid in full.
5. AA principal, after AAA is fully redeemed.
6. A principal, after AA.
7. BBB principal, after A.
8. BB and B principal, after BBB.
9. Subordinated note (equity) principal. Equity holders get back their last dollars only after every rated note has been redeemed.

This strict sequential repayment is what gives senior CLO debt its high recovery rate. Even in a deal where collateral has lost meaningful par, AAA is repaid first and in full from whatever proceeds exist; the junior tranches absorb losses in reverse seniority order.

How OC and IC Tests Reroute Cash

The most consequential branch in either waterfall is what happens when a coverage test fails. Tests are computed by the trustee on each payment date, before the waterfall is run. A failed test does not unwind earlier payments; it redirects the cash that would have flowed to lower tranches.

Mechanically, the failure rule for an OC test at any tranche level is:

• The interest waterfall reaches that tranche’s OC test step.
• The test fails (par-of-collateral divided by tranche-and-senior debt is below the trigger).
• Remaining interest is redirected to redeem senior tranche principal in priority order — AAA first, then AA, and so on — until the test cures.
• If interest alone does not cure the test, the same logic applies to principal proceeds in the principal waterfall.
• Equity and any tranches junior to the failing test receive nothing until the test passes.

For a deeper treatment of how the tests themselves are computed and why they cure, see Coverage Tests.

A Worked Example

Consider a stylized $400 million CLO with the following structure:

• $248M AAA at SOFR + 145 bps
• $48M AA at SOFR + 200 bps
• $24M A at SOFR + 285 bps
• $24M BBB at SOFR + 425 bps
• $20M BB at SOFR + 700 bps
• $36M Subordinated (equity)

Assume in a given quarter the trustee receives $9.0M of interest proceeds. SOFR is 4.50%. The interest waterfall plays out roughly like this, before any test failure:

1. Senior fees: ~$0.20M out.
2. Senior management fee at ~17.5 bps annually on $400M par: ~$0.18M.
3. AAA interest at SOFR + 145 bps on $248M: ~$3.69M for the quarter.
4. AA interest at SOFR + 200 bps on $48M: ~$0.78M.
5. Senior OC/IC tests pass. Continue.
6. A interest: ~$0.44M.
7. BBB interest: ~$0.54M.
8. Mezzanine OC/IC tests pass. Continue.
9. BB interest: ~$0.56M.
10. Subordinated management fee: ~$0.30M.
11. Equity residual: roughly $9.0M minus the ~$6.69M above = ~$2.31M to subordinated noteholders.

Now repeat the period with the senior OC test failing because defaulted-loan write-downs have eroded par. AAA and AA interest are still paid in full. But after step 5, instead of moving to A interest, the trustee redirects all remaining cash — roughly $4.13M — to redeem AAA principal until the senior OC test cures. A, BBB, BB, the subordinated management fee, and equity all receive zero until the test passes.

This is the structural reason equity is volatile and AAA is not. Equity is the residual of every line above it; one or two failing tests can crush a quarter’s distribution. AAA is at the top of the cash-flow priority and is also the beneficiary of every diversion below it.

How the Waterfall Changes Across the Lifecycle

The same waterfall structure applies throughout the deal’s life, but its practical effect shifts. See the full CLO Lifecycle page for context.

• Reinvestment period. Principal proceeds are usually reinvested rather than distributed; the principal waterfall plays a small role except when a coverage test fails. Equity distributions are typically at their highest during this phase.
• Post-reinvestment. Loan prepayments and amortization flow through the principal waterfall to senior tranches. AAA begins to amortize, and equity residuals decline as the deal de-levers.
• Refi or reset. Existing tranches are paid off through a one-time use of the principal waterfall, and new tranches are issued at a new spread. See Refinancing & Resets.
• Optional redemption. Equity, often via the controlling class, calls the deal. The trustee runs the principal waterfall once, paying off all rated tranches; remaining collateral proceeds and any residual go to equity.

Common Mistakes in Reading a Waterfall

• Confusing the interest and principal waterfalls. They run in parallel each period and follow related but distinct sequences. A failed test affects both.
• Assuming OC failure means AAA loss. The opposite. OC failure accelerates AAA repayment; it is junior tranches and equity that lose.
• Forgetting the subordinated management fee. Investors who only look at the senior management fee underestimate manager economics. The subordinated and incentive fees are where managers earn most of their alpha-linked income.
• Treating equity residual as a fixed coupon. Equity is a true residual. A small move in coverage cushion or in reinvestment spreads can swing a quarter’s distribution by 20% or more.
• Ignoring the reinvestment-period flag in the principal waterfall. The exact same dollar of principal proceeds is treated very differently in year three (reinvested) than in year seven (paid out).

For how the underlying tranche economics interact with this priority structure, see Tranches Explained and CLO Equity.