Invisible spending isn’t dramatic—but over time, it can seriously undermine your financial goals. Vinnikava Viktoryia/Shutterstock
Three months ago, I decided to track every single dollar that left my bank accounts. Not the big stuff—I already knew what my mortgage and car payment cost. I’m talking about every coffee, every subscription, every impulse buy, every convenience fee. By the end of 90 days, I’d found $1,200 in monthly spending I couldn’t justify—and the experience fundamentally changed how I think about money.
The Experiment That Changed Everything
The idea started after reading a NerdWallet study that found the average American spends $219 per month on subscription services alone—and that 42 percent of consumers are paying for subscriptions they’ve forgotten about. I suspected my own spending had similar blind spots, but I had no idea how large they actually were.
I used a combination of Mint and a simple spreadsheet to categorize every transaction across all of my accounts: two credit cards, a debit card, Venmo, PayPal, and cash. For 90 days, nothing escaped documentation.
