Mental accounting is the habit of sorting money into subjective categories—such as overtime pay, a tax refund, or savings for a particular goal—and making spending decisions based on those labels. As a result, the same amount can feel more or less available even when its objective value is identical. A 2026 study of 5,589 people in 21 countries found evidence that these patterns remain relevant in an era of increasingly digital payments.
What mental accounting means
Mental accounting describes how people mentally organize money by its perceived source, purpose, or context. A dollar is financially interchangeable with another dollar, but people may not treat every dollar as equally spendable. Columbia University gives the example of receiving $100 in overtime pay versus a $100 tax refund: someone may feel more comfortable spending the overtime pay, even though the amounts are equal.
This does not mean every financial choice is irrational. The category attached to money can help people plan and stick to priorities. But it can also lead someone to make different choices about equal sums simply because the money arrived or is being spent under a different label.
What the 2026 study found
“The Robustness of Mental Accounting Across 21 Countries,” published in the Journal of Consumer Research, included 5,589 participants in 21 countries. Giulia Priolo, Federica Stablum, and Enrico Rubaltelli led the study, with Kai Ruggeri as senior expert. The researchers used online scenarios presented in local languages and adjusted monetary values relative to each country’s gross national product. Columbia University Mailman School of Public Health’s September 28, 2026 summary describes the study’s scale and reported patterns.
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The scenarios included choices involving identical products and prices at different stores, as well as whether to make a $5 saving on a $10 purchase or a $100 purchase. These examples probe whether people judge an amount in isolation or in relation to the transaction around it.
Patterns varied across contexts
The official summary reports weaker mental-accounting effects in lower-income countries than in higher-income countries. It also reports variation depending on whether decisions took place in an individual or interactive social context, whether participants made decisions for themselves or someone else, and whether they were setting prices or evaluating them.
The announcement says age, education, and household income were not associated with mental accounting in the reported analysis. That is a result of this study’s analysis, not evidence that these characteristics can never matter in other settings.
How a money label can affect spending timing
A Flexible Spending Account (FSA) illustrates how a mental category may shape when someone spends. Ruggeri describes people who avoid buying needed glasses or medicine earlier in the year despite having FSA funds, then feel pressure to use the balance as a “use it or lose it” deadline approaches. The balance may feel like protected savings at one point and money that must be spent later.
Ruggeri also suggests that a needed purchase made near the deadline may be suboptimal and that retailers may charge a premium as the deadline nears. These are illustrative expert observations in Columbia’s announcement, not measured estimates of how common the behavior is or how large any price premium may be.
What the findings do—and do not—establish
The study supports the view that mental accounting remains relevant across varied national and social contexts, including a period when digital payments are widespread. Ruggeri said: “Considering major changes in how we receive and spend money, especially with the proliferation of automated digital payments, a large, robust study of the concept of mental accounting was not only appropriate, it was necessary.”
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Columbia’s accessible summary does not list every country, provide effect sizes, or give full details about sampling, analysis, or limitations. It therefore supports describing reported patterns, but not claiming that the study proves mental accounting causes a particular financial outcome or quantifies how strongly it affects any one person.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.How to use the idea in everyday money decisions
When a sum feels unusually easy or difficult to spend, identify the label you have attached to it. Ask whether the decision would change if the same amount came from another source or were assigned a different purpose. Then check the underlying facts: what the purchase costs, whether it is needed, and what trade-offs spending the money creates. Mental categories can be useful budgeting tools, but noticing them can help prevent a label from deciding for you.
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