What IELTS Academic Task 1 requires
IELTS Academic Writing Task 1 may present a graph, table, chart or diagram. IELTS says you should write at least 150 words in about 20 minutes. Your response should summarise the main features and make comparisons where relevant.
For a bar chart, the challenge is usually not vocabulary. It is deciding which bars belong together and which differences are important enough to report.
First decide: static or changing over time?
Static bar chart
Shows categories at one time point. Focus on comparisons: highest, lowest, similar values, large gaps and proportions.
Time-based bar chart
Shows the same categories across years or periods. You can describe both comparisons and change: rose, fell, remained stable, doubled or fluctuated.
This distinction matters because using trend verbs such as “rose” or “fell” for a chart with no time change is inaccurate.
A reliable 4-paragraph structure
1. Introduction
Paraphrase what the chart measures, the categories shown, the place if relevant and the time period.
2. Overview
State the biggest patterns in one or two sentences: the dominant category, the lowest category, the widest gap, a clear rise or fall, or another striking contrast.
3. Body paragraph 1
Group two or more related categories and support the comparison with selected figures.
4. Body paragraph 2
Cover the remaining important categories and compare them directly where useful.
How to choose the main features
Before writing, scan the chart for patterns instead of reading every number in order. Ask:
- Which category is highest and which is lowest?
- Are any categories almost the same?
- Is one value roughly double or triple another?
- Which gap is the largest?
- If years are shown, which category changes the most?
- Can the bars be divided into two useful groups?
Official IELTS preparation guidance specifically emphasises selecting key features and presenting an overview, so your report should prioritise patterns over exhaustive detail.
Useful bar chart vocabulary
Comparisons
higher than, lower than, similar to, considerably more than, slightly below, approximately twice as high as
Ranking
recorded the highest figure, ranked second, had the lowest proportion, was followed by
Proportions
accounted for, represented, made up, the proportion of, the percentage of
Change over time
rose, fell, increased, declined, remained stable, doubled — only when the chart actually shows time-based change
Original IELTS-style worked example
Practice prompt
A bar chart compares the percentage of commuters using four forms of transport in one city in 2010 and 2025. Car use falls from 52% to 38%, bus use rises from 21% to 27%, rail use increases from 17% to 25%, and cycling grows from 10% to 18%.
Sample overview
Overall, cars remained the most commonly used form of transport despite a substantial decline in their share. By contrast, the proportions travelling by bus, rail and bicycle all increased, with rail showing the largest gain among the three alternatives.
Possible body grouping
Body paragraph 1 could compare car and bus use, while Body paragraph 2 could group rail and cycling because both gained share over the period. The exact grouping can vary; what matters is that the organisation makes the comparisons easy to follow.
Common bar chart mistakes
- Writing one sentence for every bar instead of grouping information.
- Leaving out a clear overview of the main patterns.
- Using trend vocabulary on a static chart.
- Copying the chart wording instead of paraphrasing naturally.
- Reporting too many minor figures and missing the major comparisons.
- Adding opinions or explanations that are not shown in the visual.
- Spending too long on Task 1 and reducing the time available for Task 2, which contributes twice as much to the Writing score.
A practical 20-minute method
- Spend about 2 minutes reading axes, units, categories and dates.
- Spend about 2 minutes selecting the main features and deciding your two body groups.
- Write the introduction and overview first.
- Write two comparison-focused body paragraphs.
- Use the final few minutes to check figures, tense, grammar, spelling and whether you actually compared categories.
Practise Task 1 on computer
Use CBI Prep for timed IELTS Writing practice, then complete a full mock test to see whether your planning and typing remain controlled under exam conditions.
Related Task 1 guides
Frequently asked questions
How long should I spend on IELTS Writing Task 1?
IELTS recommends about 20 minutes for Academic Writing Task 1, and the response must contain at least 150 words.
Do I need to describe every bar?
No. The task asks you to select and report the main features and make relevant comparisons. Focus on the most important highs, lows, gaps, similarities and changes.
Can I use words like increased and decreased for every bar chart?
Only when the chart actually shows change over time. For a static chart with one time point, use comparison language such as higher than, lower than, similar to, twice as high as or accounted for.
Should I include an overview?
Yes. Official IELTS preparation guidance emphasises selecting key features and presenting an overview of the main patterns rather than listing details one by one.