The Latte Factor Calculator shows the true long-term cost of small daily expenses by calculating what that money would be worth if invested instead. It's a powerful way to make conscious spending decisions — not a guilt trip about coffee.
Use it free in your browser — no account or download required.
Key Features
Track up to 5 daily spending habits simultaneously
Year-by-year compound growth chart
Inflation-adjusted real value over time
Break-even year indicator per habit
Per-habit and combined opportunity cost
Quick-load presets for coffee, lunch, streaming, and more
How to Use Latte Factor Calculator
Step 1: Enter a daily spending habit Name the habit (e.g., 'Morning Coffee', 'Lunch Out', 'Netflix') and enter the daily cost. For weekly habits like dining out, divide the weekly cost by 7 for a daily average.
Step 2: Set the assumed annual investment return The default is 7%, which approximates the historical average return of a diversified stock market index fund after inflation. Use 4–5% for a more conservative estimate.
Step 3: View the 5, 10, and 20-year opportunity cost The calculator shows what the daily amount would grow to if invested consistently over 5, 10, and 20 years. The 20-year figure is often startling.
The point of this tool is awareness, not deprivation. Use it to identify the habits where the trade-off isn't worth it to you.
Use 6–8% as a reasonable long-term stock market return assumption. Avoid unrealistic rates like 15%.
Run the calculator for every subscription you pay for. Subscription creep is the modern latte factor.
Frequently Asked Questions
Does the calculator use compound interest?
Yes. It assumes the daily savings are invested and compounded annually at the return rate you enter. This is why the 20-year figure grows so dramatically.
What return rate should I use?
7% is a reasonable real (after-inflation) return for a diversified index fund over the long term. For nominal returns, use 9–10%. For a savings account, use 4–5%.
Available Plans
Free — Core features available instantly, no account needed
Pro — Unlock AI features, unlimited saves, and PDF/DOCX export
Pro+ — Everything in Pro, plus no ads and advanced AI features