The shape of UPI spending
The technique
The ten you remember are not the money
People estimate their UPI spend from the payments they can recall, and the recallable payments are the large ones. The large ones are a minority of the total, so the estimate comes out low by more than half, every month.
Take a salaried person earning ₹40,000 a month who makes 90 UPI debits averaging ₹180. That is ₹16,200, or 40.5 percent of salary, through a channel that produces no receipt anyone keeps. The household is illustrative; the arithmetic is the point, and you can redo it on one month of your own statement.
Split the 90 payments by size. The ten largest average ₹650 and add up to ₹6,500. The remaining 80 average ₹121 and add up to ₹9,700. So the payments that feel like spending are 40 percent of UPI spend and the ones that feel like nothing are 60 percent. Ask this person what they spend on UPI and they will say something near ₹6,500: not a guess, a faithful report of the part they can see.
| Illustrative month | Count | Average | Total | Share |
|---|---|---|---|---|
| All UPI debits | 90 | ₹180 | ₹16,200 | 40.5% of salary |
| Ten largest | 10 | ₹650 | ₹6,500 | 40% of UPI spend |
| Remaining | 80 | ₹121 | ₹9,700 | 60% of UPI spend |
- The 80 small payments are ₹323 a day over three or four moments of two seconds each. There is nothing to remember because nothing happened
- Underestimating by ₹9,700 a month is not a rounding error on ₹40,000. It is why the month ends tighter than the mental budget said, and why the shortfall never has a name







