Homeowners typically spend several hundred to several thousand dollars for distribution box work in septic systems, depending on system size, material, and installation complexity. The distribution box cost encompasses not only the initial purchase. It is the silent heart of any building, pumping electricity to every corner, yet we only think about it when the lights go out or the budget needs a signature. Today's distribution boxes do far more than just split circuits. Key cost drivers include panel amperage, indoor vs outdoor location, wiring length, and whether a full panel upgrade or rerouting is needed.