Habit Cost Calculator

See the true lifetime cost of a recurring habit and its opportunity cost.

Frequently Asked Questions

What is the opportunity cost of a habit?

The opportunity cost is what you would have if you had invested the habit's money instead of spending it. A $5/day habit invested at 7% annual return for 20 years grows to approximately $47,000 - money that would otherwise simply be spent on the habit.

Should I quit every expensive habit?

Not necessarily. Habits have value beyond their cost: social connection, pleasure, stress relief, productivity. The goal is to make the cost-benefit decision consciously. Some habits are worth every dollar; others are on autopilot and would be easy to cut without sacrificing much joy.

What investment return rate should I use?

The US stock market has returned about 7% per year on average after inflation over the long run. Use 4-5% for a conservative estimate (bonds and cash) or 7-10% for an equity-heavy assumption. Higher rates make the opportunity cost look larger; lower rates are more conservative.

How do I find my actual habit costs?

Check your bank or credit card statements and search for recurring merchants or categories. Many banking apps have spending categorisation features. A month of tracked spending usually reveals several habits you forgot you had.

Important Disclaimer: Estimates for informational purposes only.

This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.