Sunk Cost

Definition

A cost that has already been incurred and cannot be recovered.

Example

$100k spent on a canceled R&D project is a sunk cost.

How to Think About It

Should not be considered in future investment decisions.

Plain-English Meaning

In plain English, Sunk Cost is part of the financial structure that helps a company understand what is happening, what it owns, what it owes, or what needs attention.

Why It Matters

Sunk Cost matters because companies make better decisions when the underlying accounting and financial structure is clear, consistent, and reviewed.

Common Issues Businesses See

• The term is recorded or interpreted differently by different people.
• The underlying account, report, or workflow is not reviewed regularly.
• The number exists in the accounting system but is not decision-ready.
• Leadership gets the report without the operating context behind it.

What Good Looks Like

• Clear definitions.
• Clean accounting records.
• Consistent reporting rhythm.
• Leadership can explain what the number means and what action it requires.

How Accounting Your Life Helps

Accounting Your Life helps companies clean up the structure behind Sunk Cost: the accounts, reports, ownership, cadence, controls, and management review needed to make the information useful.