Put the idea to work
Give your next paycheck a plan.
Explore how your take-home pay could be split and where the next dollar could go. Start with your commitments, not the example’s numbers.
Open the paycheck planner ↗A money idea you can try · About two minutes
Could your cash buffer absorb a surprise?
A cash buffer is money kept available for an unplanned expense. Try one choice, see what it changes, and see what it cannot fix. You can start here without playing a game.
In the arcade, spare hearts buy another chance. Here, the question is how much cash is still available when a bill arrives.Choose what stays available.
Fictional example. Essential bills and commitments are already covered. Amounts use dollars for illustration; the arithmetic works in any currency.
$0$600
Enter whole amounts from 0 to 100,000 in all three boxes.
Nothing you enter is saved or sent. This example resets when you reload.
When the expense arrives
$150
not covered by the buffer
$300 covered$450 expense
| At the time of the expense | Set aside $0 | Set aside $200 |
|---|---|---|
| Buffer before expense | $100 | $300 |
| Expense not covered | $350 | $150 |
| Buffer left after expense | $0 | $0 |
| Available for other spending earlier | $600 | $400 |
Setting aside $200 leaves $400 for other spending earlier. It reduces the amount this buffer cannot cover by $200.
The buffer does not cover this whole expense.
The key assumption: money not reserved has been spent before the surprise. If you kept that money unspent elsewhere, it could also help. Moving money into a separate bucket does not create more money.
What a buffer changes
It keeps some cash available for an unexpected cost. It does not reduce that cost or guarantee you can cover every surprise. In this example, a larger reserve also leaves less for other spending before the expense arrives.
There is no universal right amount in this exercise. Real choices depend on essential bills, the timing and reliability of income, upcoming costs, debt and other resources. An uncovered amount is a gap to plan for, not an automatic prediction that you will borrow.
Try either answer. Your result and the resources below stay available.
Go deeper with the video
Why saving last can keep you stuck
The related Vantage Point video explains why money needs a plan before it disappears into everyday spending.
Watch on YouTube ↗About this example
Written by Vantage Point. Updated September 12, 2026. Calculations subtract the expense from the available buffer, with a minimum remaining balance of zero. No interest, investment returns, fees or borrowing are modelled.
For background, the U.S. Consumer Financial Protection Bureau explains what an emergency fund is and why its size depends on your situation in its guide to building an emergency fund. Its country-specific account guidance is separate from this arithmetic example.
Here for a little fun? Play Scout’s arcade ↗ or visit the harbour ↗. Your game score does not measure financial skill.