The idea is called the latte effect, and it’s been kicking around personal finance for over twenty years. It’s worth understanding — not because coffee is the enemy, but because the principle behind it is one of the most important concepts in long-term investing.
Where the idea comes from
The term was popularized by David Bach in his 2003 book The Automatic Millionaire. His argument was simple: most people don’t have a wealth problem because of a few big mistakes. They have it because of dozens of small, recurring expenses that quietly redirect money away from their future.
The latte was just a stand-in. It could be the daily takeout lunch, the streaming subscriptions you don’t watch, the upgraded phone plan, the convenience-store stop on the way home. Anything small, frequent, and habitual.
The point isn’t that coffee is bad. The point is that small recurring spending, multiplied across years and decades, is large enough to matter — and most people never run the numbers.
So let’s actually run the numbers
Take a six-dollar latte, five days a week. That’s $30 a week, or $1,560 a year. On its own, that doesn’t feel like a meaningful number. It’s roughly 1% to 2% of a typical professional’s after-tax income.
But money behaves differently when it’s invested instead of spent.
If that $1,560 a year were redirected into a diversified portfolio earning returns roughly in line with the long-term historical average of the U.S. stock market, here’s the shape of what could happen over 20 years:
- At ~7% annual returns, it grows to about $64,000
- At ~8% annual returns, it grows to about $71,000
- At ~9% annual returns, it grows to about $80,000
That’s from a coffee habit.
Worth being explicit about what those numbers assume: consistent annual contributions, no missed years, returns roughly comparable to long-term historical equity averages, and reinvested gains. Real-world returns vary considerably year to year — some periods exceed the average, others fall well short.
Past performance does not guarantee future results. The figures above are illustrative, meant to show the math of compounding, not a promise of any specific outcome.
The point isn’t deprivation
This is where the latte effect gets misunderstood.
The lesson is not “stop drinking coffee.” If you genuinely enjoy your morning latte and it’s a small bright spot in your day, drink the latte. The lesson is intention: knowing what your recurring expenses are, deciding which ones are worth it, and redirecting the ones that aren’t.
Almost everyone has at least one or two “lattes” in their budget — recurring spends they wouldn’t miss if they vanished. The unused gym membership. The subscription that auto-renewed twice ago. The takeout habit that started during a busy quarter and never ended. The point of the exercise is to find them, not to feel guilty about them.
How to actually do this
Three steps, in order:
1. Find your lattes. Pull three months of credit card and bank statements. Highlight every recurring charge. You’re looking for things you forgot you were paying for, or things that don’t actually deliver value relative to their cost. Most people find at least $100 a month within 30 minutes.
2. Redirect, don’t just cancel. This is the step most people skip. If you cancel a $50 subscription and the money just sits in checking, it gets absorbed into general spending within a month. The savings only become wealth if they’re moved — into a brokerage account, an IRA, a 401(k) increase, anything that gets the money working.
3. Automate it. Set up the transfer the same week you cancel. The whole point is to remove willpower from the equation. Money you never see is money you can’t accidentally spend.
The bottom line
Little changes make big differences — but only when they’re directed somewhere on purpose. The latte effect isn’t about coffee. It’s about understanding that recurring expenses and compound growth both work the same way: quietly, consistently, and over long time horizons.
Find one or two recurring spends you wouldn’t miss. Redirect them. Automate it. Then let time do the work.
The investment growth figures in this post are hypothetical illustrations based on assumed annual returns and are not predictions or guarantees. Actual investment returns will vary and may be higher or lower than the figures shown. Past performance is not indicative of future results. Investing involves risk, including possible loss of principal.
Want help finding the bigger leaks?
The “latte” in most portfolios isn’t a $6 coffee — it’s the layer of fees, expense ratios, and hidden costs inside investment products that most people never see on a statement. Those numbers are usually larger than any coffee habit, and they compound the same way.
A portfolio review will surface what you’re actually paying, what you actually own, and how it stacks up against a model built around individual equities and lower structural costs.
Schedule your portfolio review or reach out directly at inquiry@advisormike.com.
