Corporate Finance

Cost Allocation and Overhead Politics

Who pays for headquarters, and why the answer quietly reshapes prices, product decisions, and every divisional fight in the building.

  • Intermediate
  • 6 min total
  • 10 chapters

What decision this helps you make: How to spread shared costs across products, units, and customers, so the numbers inform decisions instead of fueling politics.

What this topic is

Cost allocation assigns shared costs (rent, IT, HR, leadership, machines) to the products, divisions, or customers that (supposedly) consume them. The method chosen decides which offerings look profitable, which units look bloated, and who storms into whose office.

Why it matters

Every allocated number is an argument wearing math's clothes. Bad allocation kills profitable products (they "couldn't carry the overhead"), protects real losers, misprices bids, and turns budget season into war. Good allocation follows causation, and knows when NOT to allocate at all.

Who should learn it

Anyone who prices from "fully loaded" costs, runs a division charged for HQ, or decides product lines by profitability reports, and students meeting activity-based costing beyond the textbook.

What you will understand

  • Why allocation exists, and why every method is partly arbitrary
  • Follow causation: drivers and activity-based logic over peanut butter
  • Spot the death spiral before it kills your best products
  • Use the right cost for each decision: full, marginal, or none

Prerequisites

Common misconception

"Fully loaded cost is the true cost." There is no true cost of a product that shares a building, only defensible assignments. The fully loaded figure is one lens (fine for long-run pricing floors), and a dangerous one for drop/keep decisions, where the only question is which costs actually DISAPPEAR.