We all have quirky behaviours when it comes to managing money. One trick we fall victim to is called mental accounting. We separate our money into different types of mental accounts, with different rules, depending upon how we get it, how we spend it, and how it makes us feel.
An easy example is when you have a fund set aside for something like a vacation or house down payment while at the same time carrying high-interest credit-card debt. Or how you decide to spend a $1,200 tax refund versus what you’d do with $100 per month if you had the right amount of tax coming off your paycheque in the first place.
I’m guilty of mental accounting every month when I budget $1,000 for groceries, $200 for dining out, $125 for clothing, and $75 for alcohol. I manipulate those mental accounts all the time, like when I overspend in one category and just take it out of another (shifting a meal from ‘dining’ to ‘entertainment’ for example).
The Mental Accounting challenge
Why do we assign money to these mental categories? One answer is to control how we think about it. If we were perfectly rational and could figure out the opportunity costs and complex trade-offs of every single financial transaction then it wouldn’t matter how we label our money: it would just come from a big pool called ‘our money.’ It’s just money, after all; totally fungible and interchangeable.
But because we’re human with cognitive limitations and emotions we need help with our money decisions. That’s where mental accounting comes in and acts as a useful shortcut for what decisions to make.
Another interesting way we classify our financial decisions has to do with the length of time between when we bought an item and when we consumed it.
Nobel Prize winner Richard Thaler studied wine purchases and consumption and found that advance purchases of wine are often thought of as investments. Months or years later, when the bottle is opened and consumed, the consumption feels free, as if no money was spent on wine that evening. Continue Reading…









