IELTS Bar Chart: Band 9 Model Answer, Structure and Vocabulary
Key Takeaways
- An IELTS bar chart question asks you to compare categories, sometimes across two or more years, in at least 150 words and about 20 minutes.
- Use four paragraphs: a paraphrase, an overview of the biggest differences, and two paragraphs that group the bars and compare them.
- Group the bars by year, by direction of change or by size, whichever makes the comparison clearest; never describe one bar at a time.
- The band descriptors ask for a clear overview at Band 7 and at least an attempted one at Band 6, so always write one.
- Bar charts reward comparison language: comparatives, superlatives, whereas and by contrast, and percentage points for differences between percentages.
Table of Contents
An IELTS bar chart question asks you to compare the size of different categories, sometimes at two or more points in time, in at least 150 words, in about 20 minutes. The highest-scoring answers have four paragraphs: a paraphrase of the question, an overview of the biggest differences, and two paragraphs of detail that group the bars and compare them, instead of describing each bar in turn.
This guide shows you that structure, works through a sample bar chart question with a full model answer written to the Band 9 descriptors, explains why the answer meets each marking criterion, and gives you the comparison vocabulary you need for IELTS Academic Writing Task 1.
What is a bar chart question in IELTS Writing Task 1?
In IELTS Academic Writing Task 1 you describe a graph, table, chart or diagram in your own words. The official IELTS Academic Writing format page sets the rules: at least 150 words, about 20 minutes, full sentences and no bullet points. Task 1 counts for one third of your Writing band.
A bar chart compares quantities across categories: countries, age groups, products or, as in the sample below, ways of travelling. Some bar charts show one point in time and are about comparison only. Others show two or more years side by side, so you compare the categories and also describe how each one changed. Either way, report what the chart shows, without reasons or opinions.
How do you structure a bar chart answer?
- Introduction (one sentence). Paraphrase what the chart shows, for whom, where and when.
- Overview (one or two sentences). State the biggest differences: the largest and smallest categories and, for a chart with several years, the main changes. No numbers are needed here. The band descriptors ask for a clear overview at Band 7 and at least an attempted one at Band 6.
- Detail paragraph 1. Describe one group of bars with supporting figures, for example the first year, or the categories that grew.
- Detail paragraph 2. Describe the other group and compare it with the first.
The way you group bars is the key decision. Split by year when the chart shows a before and after; split by direction (the categories that rose, then those that fell) when the change is the main story; split by size (the biggest categories, then the smaller ones) for a chart with a single year.
Sample IELTS bar chart question
The question below is an original practice task written by Galvanize. The figures are invented for practice.
The chart below shows the percentage of students at a university who used four different ways of travelling to campus in 2015 and 2025. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.
The chart shows two bars for each mode of transport. The data behind it are:
| Main way of travelling to campus | 2015 (% of students) | 2025 (% of students) |
|---|---|---|
| Car | 38 | 22 |
| Bus | 25 | 30 |
| Bicycle | 12 | 26 |
| Walking | 25 | 22 |
The story: the car went from first place to joint last; cycling more than doubled; the bus became the most common way to travel. Walking barely changed. That is your overview.
Band 9 model answer: bar chart
This model answer was written to meet the Band 9 descriptors. It is 183 words. No one can guarantee an examiner’s score, but it has every feature the top band asks for.
The bar chart compares the proportion of students at a university who travelled to campus by car, bus, bicycle and on foot in 2015 and 2025.
Overall, the car lost its position as the most common way of reaching campus, while cycling became considerably more popular, and by 2025 the bus was the leading choice.
In 2015, the car was the most widely used mode of transport, accounting for 38% of students. Walking and the bus were equally popular, at a quarter of students each, whereas only 12% cycled, making the bicycle by far the least common option.
A decade later, the picture had changed markedly. The share of students who drove fell by 16 percentage points to 22%, and the proportion who walked dipped slightly to the same figure. In contrast, cycling more than doubled, rising from 12% to 26%, which made it the second most popular choice. The bus also gained ground, increasing from 25% to 30%, the highest share of any mode in 2025. In short, the period saw a clear shift away from driving towards public transport and cycling.
Why does this answer meet the Band 9 descriptors?
Task 1 is marked on four equally weighted criteria. Here is the answer set against the Band 9 wording in the official IELTS Writing band descriptors (updated May 2023).
| Criterion | What Band 9 asks for | Where the answer shows it |
|---|---|---|
| Task Achievement | All requirements of the task fully and appropriately satisfied | A clear overview; all four categories and both years covered; comparisons made between bars, not just within them |
| Coherence and Cohesion | Message followed effortlessly; cohesion rarely attracts attention; paragraphing skilfully managed | One paragraph per year; linkers such as “whereas”, “a decade later” and “in contrast” are varied; “the same figure” avoids repeating 22% |
| Lexical Resource | Wide range of vocabulary used accurately, with natural and sophisticated control | “Accounting for”, “gained ground”, “more than doubled”, “percentage points” used precisely; a quarter instead of a repeated 25% |
| Grammatical Range and Accuracy | Wide range of structures with full flexibility and control; errors extremely rare | Relative clauses (“who drove”, “which made it”), participle clauses (“making the bicycle…”), correct comparatives and superlatives |
Our guide to IELTS band scores explains how the four criterion scores become your Writing band.
What vocabulary do you need for a bar chart?
Bar charts are about comparison, so the language you need is mostly comparatives, superlatives and ways of expressing proportion.
| Purpose | Useful language |
|---|---|
| Largest and smallest | the most popular / common; the highest proportion of; by far the least common; the leading choice |
| Comparing two bars | higher than; twice as many as; three times as high as; slightly fewer than; far more than |
| Equal bars | equally popular; the same proportion; identical figures; at the same level |
| Contrast | whereas; while; by contrast; in contrast; compared with |
| Share of a total | accounted for; made up; represented; a quarter of; just over a third of; the majority of |
| Change between years | rose, fell, doubled, halved, gained ground, lost ground, overtook |
Two points trip up many candidates:
- Percent or percentage points. When 38% falls to 22%, that is a fall of 16 percentage points, not 16 percent. Using the right term is a precise lexical choice that examiners notice.
- Many or much, fewer or less. Use many and fewer with countable nouns (fewer students, more cars) and much and less with uncountable ones (less traffic, much more time).
For trend words such as climb, plummet and level off, see our guide to the IELTS line graph, which covers change over time in detail. For general word lists, see our IELTS vocabulary guide.
Which mistakes lower a bar chart score?
- Describing one bar at a time. “Car was 38%. Bus was 25%. Bicycle was 12%.” reports data without comparing it, which keeps Task Achievement and Coherence low.
- No overview. Band 6 for Task Achievement needs a relevant overview to be attempted, and Band 7 needs a clear one. Without one, you stay below Band 6.
- Misreading the axis. Check whether the bars show percentages, thousands or millions, and use the same unit in every sentence.
- Explaining the data. Do not suggest reasons, such as parking costs or new cycle lanes; they are not in the chart.
- Writing under 150 words. Aim for 160 to 190 words. Much longer usually means you are listing figures instead of selecting them.
Pie charts use the same proportion language; see our guide to IELTS pie charts. When you can finish a bar chart answer in 20 minutes, practise the full test with our free IELTS mock test, then estimate your overall band with the IELTS band score calculator.
Frequently Asked Questions
How many words should an IELTS bar chart answer be?
At least 150 words. Aim for 160 to 190 words so you cover the main comparisons and still finish in about 20 minutes.
How long should I spend on a bar chart in IELTS?
About 20 minutes: two or three minutes reading the chart and planning your groups, about 15 minutes writing and two minutes checking.
How do I write the overview for a bar chart?
In one or two sentences, name the largest and smallest categories and, if the chart shows more than one year, the biggest changes. Leave the figures for the detail paragraphs.
How should I group the bars?
By year when the chart shows a before and after, by direction when some categories rose and others fell, or by size when the chart shows a single year.
Do I have to mention every bar?
Mention every category, but you do not need every figure. Select the numbers that support your comparisons.
What is the difference between percent and percentage points?
A change from 38% to 22% is a fall of 16 percentage points. In percent terms it is a fall of about 42%. Use percentage points for the difference between two percentages.
Should I explain why the figures are different?
No. Report and compare what the chart shows. Reasons are not in the chart and do not earn marks.
Which tense should I use for a bar chart?
Use the past for past years and the present for current or undated data. For projections, use forms such as is expected to or is predicted to.
Can I use the same comparison words as a pie chart answer?
Yes. Proportion language such as accounted for and a quarter of works for both, but a bar chart usually needs more comparatives and contrast linkers.
Do bar charts appear in IELTS General Training?
No. General Training Writing Task 1 is a letter. Bar charts appear only in IELTS Academic Writing Task 1.
