Ask a partner where their week went and you will usually hear a version of the same answer. Not the client work. The other thing. The thread that needed three people to weigh in. The decision that came back around because someone who should have been asked wasn't. The meeting that existed to decide who decides.
This is the quiet tax. It rarely shows up on any report, and it is one of the most expensive things a growing firm carries.
Decision rights are simply the answer to a plain question: for any given decision, who owns it, who needs to be consulted, and who only needs to be told. In a small firm, everyone knows the answer without writing it down. The founders decide, and everyone else can watch them do it. The firm runs on shared memory.
That memory does not scale. Add partners, add offices, add practice areas, and the unwritten map gets crowded. Two people each believe they own the same call. A third assumes someone else has it. The decision does not get made badly. It gets made slowly, and slowness in a partnership is paid for in the most valuable currency the firm has, which is partner attention.
What unclear ownership actually costs
The cost is not just delay. It is the second-order effects. Work routes around the ambiguity. People stop raising things, because raising them starts a process no one enjoys. The partners with the most goodwill absorb the friction quietly, which hides the problem right up until one of them decides they have had enough.
Mapping decision rights is unglamorous work, and that is part of why firms avoid it. It means naming, out loud, who owns the calls that have always lived in a gray zone. It surfaces disagreements that were easier to leave buried. But the firms that do it get something back almost immediately: decisions that move, partners who spend their hours on the work only they can do, and a structure where accountability is a design choice rather than a personality trait.
The goal is not a thicker policy manual. It is a small number of clear answers to the decisions that matter most, held in a way the firm can actually maintain. Get those right, and a surprising amount of the friction partners attribute to people turns out to have been a structural question all along.