Writing Task 1: Line, Bar & Pie Charts (Academic)

Real-world analogy

What is it?

IELTS Academic Writing Task 1 requires you to describe visual information — such as line graphs, bar charts, or pie charts — in a minimum of 150 words within about 20 minutes. You must summarise the main trends, make comparisons where relevant, and highlight significant data points. This task tests your ability to objectively report data using appropriate vocabulary and grammar, without giving personal opinions.

Real-world relevance

Data description is a core professional skill. Business analysts write reports describing quarterly sales trends. Scientists describe experimental results in research papers. Journalists explain economic data to readers. Every time you see a chart in a news article with text explaining it, someone has done exactly what Task 1 asks you to do.

Key points

• Task 1 Overview — In IELTS Academic Writing Task 1, you receive a visual (graph, chart, table, diagram, or map) and must write a report of at least 150 words in about 20 minutes. You should describe the main trends, make comparisons, and highlight key features. You must NOT give opinions — this is a factual report, not an essay.
• The 4-Paragraph Structure — Use this structure for all data-based Task 1 responses: (1) Introduction — paraphrase the question/describe what the chart shows. (2) Overview — state 2-3 main trends or patterns (the "big picture"). (3) Body Paragraph 1 — detailed description with data. (4) Body Paragraph 2 — more detailed description with data. The overview is the most important paragraph for your band score.
• Writing the Introduction — Paraphrase the chart description. If the question says "The graph below shows the number of tourists visiting three cities from 2010 to 2020," you write: "The line graph illustrates the volume of tourists who visited three cities over an eleven-year period from 2010 to 2020." Change the vocabulary but keep the meaning identical.
• Writing the Overview — The overview is worth more marks than any other paragraph. State the 2-3 most important patterns WITHOUT using specific numbers. For example: "Overall, tourist numbers rose significantly in all three cities, with Paris experiencing the most dramatic growth. London, despite starting with the highest figures, saw the slowest rate of increase." This shows you understand the big picture.
• Line Chart Language — Line charts show change over time. Key phrases: "rose sharply," "declined steadily," "remained stable," "fluctuated between X and Y," "peaked at," "reached a low of," "levelled off at." Always specify the time period: "Between 2010 and 2015, sales increased from 50,000 to 85,000." Include starting points, ending points, peaks, and troughs.
• Bar Chart Language — Bar charts compare quantities across categories or time periods. Key phrases: "the highest proportion," "accounted for roughly," "was approximately twice as much as," "the figures for X and Y were comparable at around Z." For grouped bars, compare the same category across groups: "In 2015, China spent more on education than Japan, at 5.2% compared to 3.8% of GDP."
• Pie Chart Language — Pie charts show proportions of a whole. Key phrases: "the largest share," "accounted for just over a quarter," "comprised roughly one-third," "made up the smallest proportion at 5%." Always relate segments to the whole: "Housing costs represented the largest portion of expenditure at 35%, while entertainment accounted for the smallest share at just 8%."
• Selecting Key Data — You cannot describe every number in the chart — you have only 150-170 words. Select: the highest and lowest values, the biggest changes, significant trends, notable similarities or differences, and any turning points. Ignore minor fluctuations. Examiners want to see that you can identify and prioritise the most important information.
• Avoiding Common Mistakes — Do NOT write "The chart shows that people like X more" — that is an opinion. Do NOT begin every sentence with "The" or use the same sentence structure repeatedly. Do NOT copy the question word-for-word in your introduction. Do NOT describe the visual in random order — organise by trend, category, or time period. And NEVER write fewer than 150 words.
• Grammar for Task 1 — Use past simple for completed time periods ("Sales rose in 2018"). Use present simple for general facts ("The chart shows..."). Use present perfect for trends continuing to now ("Prices have increased since 2010"). Vary your sentence structures: use while/whereas for comparison ("While A increased, B declined"), and use with/followed by for ranking ("Japan had the highest rate, followed by Korea at 3.2%").

Code example

SAMPLE CHART DESCRIPTION (text-based):

LINE GRAPH DATA:
"International tourist arrivals (millions)"
         2010    2013    2016    2019
France    77      83      83      90
Spain     53      61      76      84
Italy     44      48      52      65

TASK: Describe the main trends shown in the data.

MODEL ANSWER (Band 7+):

"The line graph compares the number of international
tourist arrivals in France, Spain, and Italy over a
nine-year period from 2010 to 2019.

Overall, all three countries experienced a clear upward
trend in tourist numbers throughout the period. France
consistently attracted the most visitors, while Italy
received the fewest, though the gap between the three
nations narrowed over time.

In 2010, France led with 77 million arrivals, followed
by Spain at 53 million and Italy at 44 million.
France's figures rose steadily, reaching 90 million by
2019, although growth stalled between 2013 and 2016
when arrivals remained flat at 83 million.

Spain showed the most consistent growth, climbing from
53 million to 84 million over the period — an increase
of approximately 58%. Italy's growth was similarly
steady, rising from 44 million to 65 million. Notably,
by 2019, Spain had nearly closed the gap with France,
trailing by only 6 million arrivals compared to a
24-million gap in 2010."

Word count: 163 words

STRUCTURE BREAKDOWN:
Paragraph 1: Introduction (paraphrased question)
Paragraph 2: Overview (main trends, no numbers)
Paragraph 3: Body 1 (France detail + starting data)
Paragraph 4: Body 2 (Spain and Italy detail + comparison)

Line-by-line walkthrough

1. 1. The model answer begins with an introduction that paraphrases the question: "compares" instead of "shows," "international tourist arrivals" kept as is, "nine-year period" instead of repeating the dates.
2. 2. The overview identifies three key patterns: (1) all countries grew, (2) France was always highest, (3) the gap narrowed. No numbers are used here.
3. 3. Body paragraph 1 focuses on France with specific data: 77 million start, 90 million end, and the notable stall between 2013-2016. This shows the ability to identify an exception to the general trend.
4. 4. Body paragraph 2 covers Spain and Italy, making comparisons: Spain grew 58%, and the gap with France shrank from 24 million to 6 million. This demonstrates analytical comparison skills.
5. 5. The response uses varied vocabulary: "rose steadily," "climbing from," "remained flat," "trailing by" — no phrase is repeated.
6. 6. Sentence structures vary: simple ("France led with 77 million"), complex with subordinate clauses ("although growth stalled between 2013 and 2016"), and comparison structures ("compared to a 24-million gap").
7. 7. At 163 words, the response exceeds the 150-word minimum without being excessively long — the ideal range is 155-180 words for Task 1.

Spot the bug

A student wrote this Task 1 response:

"The graph shows tourist numbers in France, Spain and
Italy from 2010 to 2019.

France had 77 million tourists in 2010. In 2013 it had
83 million. In 2016 it had 83 million. In 2019 it had
90 million. Spain had 53 million in 2010. In 2013 it
had 61 million. In 2016 it had 76 million. In 2019 it
had 84 million. Italy had 44 million in 2010. In 2013
it had 48 million. In 2016 it had 52 million. In 2019
it had 65 million.

I think France is the best country for tourism because
it has the most visitors. Spain is also very popular.
I would like to visit all three countries someday."

Explain like I'm 5

Fun fact

Hands-on challenge

More resources

• IELTS Writing Task 1: How to Describe Charts (IELTS Liz)
• Task 1 Academic Writing Guide (British Council)
• Writing Task 1 Band Descriptors (IELTS.org)
• Cambridge IELTS Writing Practice Materials (Cambridge)