Private equity economics are built on a deceptively simple idea: managers should only get richly rewarded if they first make their investors whole with a minimum acceptable return. The preferred return — also called the hurdle rate — is the mechanism that enforces this principle. It determines who gets paid what, and when, from every distribution a fund makes.
The waterfall: how distributions flow
PE fund distributions follow a predetermined sequence called the waterfall. Understanding the waterfall is essential to understanding who benefits from a fund's performance at each stage.
The mechanics of the preferred return
The standard hurdle rate in private equity is 8% per annum, compounding annually over the life of the fund. This means that before the GP sees any carried interest, LPs must have received: (a) all of their invested capital back, and (b) a return equivalent to 8% per year, compounded, on every pound invested for the period it was outstanding.
The compounding is important. A £100 million investment held for 5 years requires LPs to receive £146.9 million before the hurdle is cleared (£100m × 1.08⁵). For 7 years, the required amount rises to £171.4 million. This means that slower-performing funds must return considerably more capital to clear the hurdle than faster-moving ones.
The GP catch-up provision
Once the preferred return is satisfied, most fund waterfall structures include a "catch-up" period in which the GP receives a disproportionately high share of distributions — typically 80% — until the carry earned reaches 20% of all profits generated above the return of capital. Only then does the standard 80/20 split (LPs/GP) apply to all subsequent distributions.
The catch-up is designed to ensure that the GP's economics work as advertised: a 20% carried interest on profits above the hurdle rate. Without it, the GP would effectively only receive 20% of profits above the hurdle rather than 20% of all excess profits, because the first tranche of excess profits is already flowing exclusively to LPs.
European vs American waterfall
There are two dominant waterfall structures with importantly different LP protections. The European waterfall (also called "deal-by-deal with full clawback") requires all capital to be returned across the entire fund before the GP receives any carry — protecting LPs from a scenario where a GP collects carry on early winners even if later investments underperform. The American waterfall (deal-by-deal carry) allows the GP to collect carry on individual successful exits even before the whole fund is returned, subject to a clawback provision if the overall fund ultimately underperforms.
The clawback requires the GP to return any excess carry received if, at the end of the fund's life, LPs did not receive their preferred return on the total capital invested. Clawbacks are legally and practically difficult to enforce — particularly if the GP principals have spent or invested the distributions — which is why many European and UK institutional LPs strongly prefer the European waterfall structure.