Waterfall chart vs bar chart
These answer different questions from the same numbers. A bar chart asks 'which of these is biggest?'. A waterfall asks 'how did we get from the first number to the last?' — and once you see the same data both ways, using bars for a bridge looks like a missed opportunity.
Both charts below are the same data — Revenue to profit — so the difference you see is the chart type, not the numbers.
Bar chart
Use it when
- The categories are independent and comparable.
- There is no running total connecting them.
- You want them ranked, or ordered by time.
- Every value is positive.
Waterfall chart
Use it when
- Each step adds to or subtracts from a running total.
- You are explaining a difference: plan to actual, opening to closing, last year to this.
- Some values are negative and that is the point.
- The first and last bars are totals, not steps.
Which one
If your categories add up to the last one, you want a waterfall. If they merely sit next to each other, you want bars. Revenue, costs and profit as three equal bars is the classic misuse — they are not three comparable things, they are a subtraction.
Questions people ask
- What is a waterfall chart used for?
- Bridging one number to another: revenue to net profit, opening cash to closing cash, budget to actual, last year's margin to this year's. Finance teams call these bridge charts for exactly that reason.
- Can a waterfall show more than one bridge?
- Not clearly. One bridge per chart. If you have several, draw several charts on the same scale so the steps stay comparable.