The "latte factor" — the idea that giving up your daily coffee will make you rich — has been rightly criticized as oversimplified. But the underlying observation is real: small, frequent purchases are the hardest spending category to track, the easiest to justify in the moment, and often the most significant when added up over a month.
Why small spending is hard to control
When you buy a car or pay rent, you feel it. The amount is large enough to register as a real decision. A $7 purchase at a convenience store doesn't feel like a decision at all — it feels like nothing. That psychological invisibility is exactly what makes small spending dangerous. No individual purchase seems worth examining, so collectively they never get examined.
The categories that catch most people
Food and drink away from home is the biggest category for most people — not just coffee, but lunches out, snacks grabbed on the go, and drinks added to a restaurant bill. App subscriptions and in-app purchases are the second most common culprit: individually small, but three unused $9.99 subscriptions and a couple of app purchases is $45 a month before you've noticed. Convenience fees round out the top three — same-day delivery markups, ATM fees at the wrong bank, parking, and tip inflation at digital checkouts.
How to find out what you're actually spending
Look at your last 60 days of bank and card transactions and tag every purchase under $20. Add them up by category. Most people are genuinely surprised by the total — not because any single item is shocking, but because the collective amount is. This exercise doesn't require a spreadsheet. Your bank's app will often do it for you, or you can export your transactions and sort by amount.
The rule that works
Rather than trying to eliminate small spending — which is demoralizing and unsustainable — give yourself a weekly "no-receipt" budget: a fixed amount of cash or card spend for small purchases that you don't need to justify or track. Once it's gone, it's gone for the week. Everything outside that amount gets the same scrutiny as a larger purchase.
The goal isn't to stop enjoying small things. It's to make the spending intentional rather than invisible. When you know what you're spending, you can decide whether it's worth it — and often, it is. But some of it won't be, and that's where the savings come from.