Mental accounting: cashback is your money coming back late

Meera, 29, works at an accounts firm in Pune. During the festive sale she buys a phone cover and a few small things, and her app credits ₹2,000 in cashback. That evening she is scrolling again. "It is free anyway," she thinks, and a ₹2,400 speaker goes into the cart.

A week earlier, the same Meera spent twenty minutes deciding whether to buy a ₹900 kurta from her salary.

What the model is

Mental accounting is the habit of sorting money into imaginary buckets, such as salary, savings, gift money, bonus and cashback, and spending each bucket by different rules. The idea comes from the economist Richard Thaler. The rupees do not know which bucket they sit in. A ₹2,000 note is the same ₹2,000 whether it came from a salary, a Diwali bonus or a reward wallet. But the bucket changes how careful we feel.

The example, step by step

Take Meera's ₹2,000 twice.

Version one: it arrives as salary. She would look at her month first: rent, her mother's medicines, the EMI on her laptop, the money she keeps aside for emergencies. A ₹2,400 speaker would make her stop and think.

Version two: it arrives as cashback. It sits in a bucket called "extra". Nothing in the month's list has a claim on it, so the speaker feels like a small treat.

Now look at what actually happened. The cashback came only because she spent money first, so it is her own money coming back to her, not a gift. The speaker costs ₹2,400 either way, and ₹400 of it still comes out of her salary.

The model does not say she must not buy the speaker. It says the bucket should not make the choice for her. If she wants it after asking the salary question, that is a fine decision.

Where the model stops

Buckets are not always bad. A separate envelope for school fees or a festival fund can protect that money from being spent on other things. Mental accounting turns into a trap only when a bucket lets you skip a question you would normally ask. Also, do not turn this into guilt about every small treat. The aim is to look first, not to deny yourself.

One thing to try today

Before you spend any cashback, reward coins or bonus money, write one line on your phone: "If this ₹ amount came from my salary, would I still buy this?" Answer it before you pay. If the answer changes, you have seen the bucket at work. If it does not, the choice is simply yours.

This is a way to think, not financial, medical or legal advice.

Each Sunday: one mental model and one real decision to try it on. /models