Task 2 · Band 8 path
Bar Chart — Comparing Categories
Decide first whether it is a trend or a comparison. Everything follows from that.
Recognise the visual
What this visual type shows, the tense and voice it demands, and the traps that cap it at Band 6.
Decide first whether it is a trend or a comparison. Everything follows from that.
Set as often as the line graph, and the most varied — bars appear with and without a time axis.
Also called: Bar graph · Column chart · Grouped bar chart
Spotting it
How this question is worded
The chart compares … in five countries
Categories, not time. There is no trend to describe: the report is built from comparison and rank order, and words like "rose" and "declined" have nothing to attach to.
The chart shows … in 1990, 2000 and 2010
Time on the x-axis. This behaves like a line graph — direction of change matters — and trend language is correct.
Bars split into segments, or two bars side by side per category
A grouped or stacked chart. Two variables at once, so the overview has to name a pattern in BOTH — which category leads, and how the split within each category behaves.
The y-axis shows percentages, and each bar totals 100
Proportions, not counts. "More people" is wrong where "a higher proportion of people" is right, and the totals cannot be added across bars.
The rule that decides Task Response
Before writing anything, decide whether the x-axis is TIME or CATEGORIES. If it is time, report direction of change. If it is categories, report rank and difference — and do not use a single trend verb, because nothing is moving. Getting this wrong makes every sentence in the report subtly untrue, and Task Achievement is capped no matter how good the English is.
The standard
What a Band 8 answer to this type does
- An introduction naming what is measured, the units, and whether the axis is time or category.
- An overview that names the largest and smallest, and any pattern common to the whole chart.
- Categories grouped by size or behaviour, not read off left to right.
- Differences quantified — "twice as many", "roughly 20 percentage points higher" — rather than merely noted.
- Comparison language where the axis is categorical; trend language only where it is time.
- Four to six selected figures, each accurate and each doing comparative work.
Where the band is lost
The 6 traps in this question type
Each of these is a specific, repeatable way to lose marks on this type — not general writing advice.
Trend language on a chart with no time axisTask Achievement 6 · Lexical Resource 6
Writing "spending on housing increased to 34%" when the chart compares five countries in a single year invents a change that does not exist. It misreports the data and it misuses the vocabulary, so it costs two criteria at once — and candidates do it constantly, because trend words are what they revised.
The fix
Look at the x-axis first. Categories → "higher than", "the largest", "twice as much as". Only a time axis earns "rose", "fell" and "fluctuated".
Reading the bars left to rightTask Achievement 6 · Coherence 6
The order the bars happen to be drawn in carries no meaning, so a report that follows it has no organising idea. The result is a list with no topic sentences, which is penalised for selection and for organisation separately.
The fix
Reorder mentally by size or behaviour. Group the leaders together, the trailers together, and give each group a paragraph with a sentence naming what they have in common.
Percentages and counts treated as the same thingTask Achievement capped at 6.5
"The number of people who cycle was 40%" is not a clumsy sentence, it is a factual error: a percentage is a proportion of something and a number is a count. On a percentage chart the correct subject is "the proportion of", "the share of" or "the percentage of".
The fix
Read the y-axis label before the first sentence and let it choose your nouns. % → proportion / share / percentage. Counts → number / total / figure.
Noting a difference without sizing itTask Achievement 6.5
"Germany was higher than Spain" is true of any two bars and tells the reader nothing they could not see. The comparison is only reported once its size is given, and sizing comparisons is the main thing a bar chart tests.
The fix
Attach a quantity to every comparison: "roughly twice as high", "some 15 percentage points above", "almost three times the figure for".
Percentage points and percent used interchangeablyGrammatical Range & Accuracy 6.5 · Lexical Resource 6.5
A rise from 20% to 30% is a rise of ten PERCENTAGE POINTS, or of fifty PER CENT. Writing "a 10% increase" for that movement states a different and wrong figure, and it is the precision error examiners most reliably notice on percentage charts.
The fix
If you are subtracting one percentage from another, say "percentage points". If you are expressing the change relative to the starting value, say "per cent".
One comparative structure used five timesGrammatical Range & Accuracy 6.5
A whole report built from "X was higher than Y" is accurate and flat. Grammatical Range is assessed alongside accuracy, so a chart report with only one comparative shape cannot reach Band 7 on that criterion.
The fix
Rotate the structures: "twice as many … as", "a third of", "outstripped", "fell short of … by", "was matched only by", "the gap between … and … stood at".
Quick reference
The Bar chart at a glance
Before writing anything, decide whether the x-axis is TIME or CATEGORIES. If it is time, report direction of change. If it is categories, report rank and difference — and do not use a single trend verb, because nothing is moving. Getting this wrong makes every sentence in the report subtly untrue, and Task Achievement is capped no matter how good the English is.
Set as often as the line graph, and the most varied — bars appear with and without a time axis.
How to recognise this question
- “The chart compares … in five countries”
- Categories, not time. There is no trend to describe: the report is built from comparison and rank order, and words like "rose" and "declined" have nothing to attach to.
- “The chart shows … in 1990, 2000 and 2010”
- Time on the x-axis. This behaves like a line graph — direction of change matters — and trend language is correct.
- “Bars split into segments, or two bars side by side per category”
- A grouped or stacked chart. Two variables at once, so the overview has to name a pattern in BOTH — which category leads, and how the split within each category behaves.
- “The y-axis shows percentages, and each bar totals 100”
- Proportions, not counts. "More people" is wrong where "a higher proportion of people" is right, and the totals cannot be added across bars.
The four-paragraph structure
Name what is measured, its units, and what the bars are divided by.
Largest, smallest, and any pattern that holds across the whole chart. No figures.
The leading group, with differences sized rather than merely noted.
The remaining categories, grouped differently, with new sentence shapes.
The traps that cap this type at Band 6
Trend language on a chart with no time axisTask Achievement 6 · Lexical Resource 6
Writing "spending on housing increased to 34%" when the chart compares five countries in a single year invents a change that does not exist. It misreports the data and it misuses the vocabulary, so it costs two criteria at once — and candidates do it constantly, because trend words are what they revised.
Fix: Look at the x-axis first. Categories → "higher than", "the largest", "twice as much as". Only a time axis earns "rose", "fell" and "fluctuated".
Reading the bars left to rightTask Achievement 6 · Coherence 6
The order the bars happen to be drawn in carries no meaning, so a report that follows it has no organising idea. The result is a list with no topic sentences, which is penalised for selection and for organisation separately.
Fix: Reorder mentally by size or behaviour. Group the leaders together, the trailers together, and give each group a paragraph with a sentence naming what they have in common.
Percentages and counts treated as the same thingTask Achievement capped at 6.5
"The number of people who cycle was 40%" is not a clumsy sentence, it is a factual error: a percentage is a proportion of something and a number is a count. On a percentage chart the correct subject is "the proportion of", "the share of" or "the percentage of".
Fix: Read the y-axis label before the first sentence and let it choose your nouns. % → proportion / share / percentage. Counts → number / total / figure.
Noting a difference without sizing itTask Achievement 6.5
"Germany was higher than Spain" is true of any two bars and tells the reader nothing they could not see. The comparison is only reported once its size is given, and sizing comparisons is the main thing a bar chart tests.
Fix: Attach a quantity to every comparison: "roughly twice as high", "some 15 percentage points above", "almost three times the figure for".
Percentage points and percent used interchangeablyGrammatical Range & Accuracy 6.5 · Lexical Resource 6.5
A rise from 20% to 30% is a rise of ten PERCENTAGE POINTS, or of fifty PER CENT. Writing "a 10% increase" for that movement states a different and wrong figure, and it is the precision error examiners most reliably notice on percentage charts.
Fix: If you are subtracting one percentage from another, say "percentage points". If you are expressing the change relative to the starting value, say "per cent".
One comparative structure used five timesGrammatical Range & Accuracy 6.5
A whole report built from "X was higher than Y" is accurate and flat. Grammatical Range is assessed alongside accuracy, so a chart report with only one comparative shape cannot reach Band 7 on that criterion.
Fix: Rotate the structures: "twice as many … as", "a third of", "outstripped", "fell short of … by", "was matched only by", "the gap between … and … stood at".
Bar chart questions — frequently asked
How do I know whether to use trend language?
Look at what divides the bars. Years → trend language is correct. Countries, categories, age groups → there is no trend, and words like "rose" invent a change the chart does not show. This one decision shapes every sentence in the report.
What is the difference between "percentage points" and "per cent"?
Subtract one percentage from another and you get percentage points: 34% minus 28% is six percentage points. Express that change relative to where it started and you get per cent: six points on a base of 28 is a rise of about 21 per cent. Calling the first one "6%" states a different number.
The chart has twenty bars. Do I describe them all?
No — and describing them all is the failure mode. You are marked on selecting key features, so four to six well-compared figures score higher than twenty listed. Group the bars, name the pattern, and quote only the figures that prove it.
What about stacked bars, where each bar is split into segments?
Two variables at once, so the overview needs a pattern in both: which whole bar is largest, and how the split inside the bars behaves. Watch the unit — stacked percentage bars total 100, so a bigger segment does not mean a bigger absolute number.
Can I say which country is doing better?
No. That is an evaluation and Task 1 asks for a report. Say Germany spent the largest share; do not say Germany spends wisely.
Next
Once this type is at Band 8, move to another — Line graph, Pie chart, Table — or check a full essay you have written in the Essay Checker
Go deeper on Task 2
- Band 9 vs Band 6.5 sample answersThe same question answered twice, compared criterion by criterion
- How IELTS Writing is markedWhat each of the four criteria actually rewards
- More Task 2 questionsA large bank of practice prompts by topic
- Timed writing mock testTask 1 and Task 2 in 60 minutes, marked like the exam