Opportunity Cost Calculator

The Opportunity Cost Calculator quantifies the value of what you forgo when choosing one option over another — a foundational concept in economics, personal finance and business strategy. Every decision carries a trade-off: the true cost of any choice is not just its price but what you give up by not pursuing the best available alternative. Making opportunity costs visible is one of the most effective tools for improving financial and time management decisions.

The formula: Opportunity Cost equals Return of Best Forgone Alternative minus Return of Chosen Option. Investing 10,000 in a savings account at 2 percent return when the stock market historically yields 7 percent creates an annual opportunity cost of 500. Compounded over 20 years, this gap exceeds 72,000. The same logic applies to time: every hour spent on a low-value task carries the opportunity cost of what could have been produced instead. A professional earning 50 per hour who spends five hours on a task that could be outsourced for 20 has a net opportunity cost of 230.

Sunk costs — money already spent and unrecoverable — should never influence opportunity cost decisions. The sunk cost fallacy causes businesses to continue unprofitable projects solely because of prior investment. Use our Subscription Calculator to identify recurring costs worth eliminating, and our Salary Calculator to assign an hourly value to your time. Free, no registration required.