Latte Factor Calculator

See what your daily small purchases would be worth invested over 10-30 years at 7%.

By Konstantin Iakovlev · Updated September 2026 · Source: BLS

Daily Small Purchaseⓘ

Days per Week

Annual Cost

$1,299.00

10 Years Invested

$18.7K

30 Years Invested

$132.1K

Your Latte Factor

Weekly	$25.00
Monthly	$108.25
Annual	$1,299.00
10 Years (at 7%)	$18.7K
20 Years (at 7%)	$56.4K
30 Years (at 7%)	$132.1K

Use the Latte Factor Calculator above to calculate your results. Enter your values and see instant results — all calculations run in your browser.

Disclaimer: This calculator is for informational purposes only. Results are estimates based on the information you provide and the assumptions described on this page.

How It Works

The phrase 'latte factor' captures how small, routine purchases can quietly add up to a fortune over a lifetime. Seeing what those daily outlays might become if you invested them instead reframes them from harmless habits into real financial choices.

Projections here rely on the future value of an annuity formula. Your daily purchase times the days per week you make it gives a weekly amount, and 4.33 weeks of that becomes a monthly contribution to an investment account earning 7% a year, compounded monthly. The formula is FV = P * [((1 + r/n)^(nt) - 1) / (r/n)], where P is that monthly amount, r is 7%, n is 12, and t is 10, 20, or 30 years.

Bear in mind that returns are never guaranteed, and 7% reflects a historical average rather than any promise of what lies ahead. The model also leaves out taxes on investment gains and any fees, both of which would trim your real returns somewhat. What people most consistently underestimate is the payoff from steady, long-term investing, where even small amounts compound into something substantial.

Example: Daily Coffee Habit

1 Say you spend $5.50 on a coffee every workday, 5 days a week. The calculator turns that into $27.50 a week and $27.50 × 4.33 = $119.08 a month, or $1,428.90 a year.
2 Each month's $119.08 is treated as a deposit into an account earning 7% a year, compounded monthly (0.07 / 12 per month).
3 After 20 years (240 deposits), the annuity factor ((1 + 0.07/12)^240 − 1) / (0.07/12) is 520.93, and $119.08 × 520.93 comes to about $62,030, which the calculator shows as $62.0K. The 10-year figure is $20.6K and the 30-year figure $145.3K.
4 That is what the coffee money could grow to if invested instead, before taxes and fees. It compares two uses of the same money rather than forecasting returns: 7% is the calculator's fixed assumption.

Source: BLS · Last updated: September 2026

Frequently Asked Questions

What is the latte factor?

The latte factor is the concept that small daily expenses, when invested instead, can grow into significant wealth over time due to compound interest. A $5 coffee every day of the week comes to $1,818.60 a year in this calculator (7 days × 4.33 weeks × 12 months), which invested at 7% for 30 years grows to about $184,900.

How much would $10 a day invested be worth in 20 years?

Investing $10 every day ($303.10 a month in this calculator: 7 days × 4.33 weeks) at a 7% average annual return, compounded monthly, grows to about $157,900 in 20 years. In 30 years, it grows to about $369,800. The power of compounding makes even small daily amounts substantial over time.

Does the latte factor really work?

The math is real, but critics note it oversimplifies personal finance. Cutting small pleasures is not the only or best path to wealth. Increasing income and cutting major expenses (housing, car, insurance) usually have a bigger impact. The latte factor is most useful as a mindset shift about where money goes.

Latte Factor Calculator

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Example: Daily Coffee Habit

Frequently Asked Questions

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