You outsourced fund administration. NAV calculations, investor statements, K-1 preparation, quarterly reporting. It's handled. But when distribution day comes and someone needs to calculate how $2.4M flows through a four-tier waterfall with 35 investors, that's not in the admin's scope. That's on you.
What Fund Admins Actually Do
Fund admins handle reporting, compliance filings, capital account maintenance, and investor communications. Some large, full-service admins do include waterfall calculations. But many don't. And even when they do, the GP provides the logic, the tier structure, and the LPA interpretation. The admin executes your instructions. They don't interpret ambiguous catch-up clauses for you.
Setting up the waterfall model correctly at the start of the fund is the GP's responsibility. If there are ambiguous clauses in the LPA, those need to be clarified before the admin can calculate anything. The admin works from your framework. They don't build it.
The Reconciliation Trap
Even at firms where the admin "does waterfalls," the actual workflow often looks like this: the GP calculates the waterfall in Excel, sends the numbers to the admin, and the admin reconciles against their own model. The GP is the source of truth. The admin is the checker.
If your source of truth is a spreadsheet with no audit trail, the checker is verifying numbers that may already be wrong. Two people agreeing on the same incorrect number doesn't make it correct. It just means the error survived two reviews.
Everything around the waterfall is covered. The math in the middle is still the GP's problem.
The GP Is Always Liable
When a distribution is wrong, the LP calls the GP, not the fund admin. The admin has indemnification clauses. The GP has the relationship. If your admin catches an error during reconciliation, that's a good outcome. If they don't, the GP owns the consequence: the LP dispute, the correction, the clawback discussion.
Fund administration protects the reporting layer. It doesn't protect the calculation layer. The admin can confirm your numbers are internally consistent. They can't guarantee the waterfall logic was right in the first place.
The Gap Nobody Talks About
GPs assume "fund administration" covers the hard math. Many discover after onboarding that their admin needs them to provide the allocation numbers, not the other way around. The reporting infrastructure is complete. The investor portal works. The K-1s are filed on time. But the actual waterfall calculation, the thing that determines who gets paid what, is still the GP's problem.
You built infrastructure for everything around the waterfall. Reporting, compliance, investor communications. The math in the middle is still on a spreadsheet on someone's desktop. That spreadsheet has no audit trail. No locked records. No version history. And it's the single most consequential calculation in your fund.