How to Write IELTS Academic Writing Task 1: Overview, Structure and Key Features

What Academic Task 1 asks you to do

IELTS Academic Writing Task 1 asks you to describe visual information, such as a chart, graph, table, map or process diagram, in at least 150 words in about 20 minutes. You summarise the main features, make comparisons where they are relevant and report the data accurately, without giving opinions or explaining causes. A clear overview of the main trends, differences or stages is the most important feature of a strong answer.

Task 1 is worth one third of your Writing band, because Task 2 counts twice as much. It is marked on four criteria that each carry 25%: Task Achievement, Coherence and Cohesion, Lexical Resource, and Grammatical Range and Accuracy. For Task 1, Task Achievement rewards accurate data, a clear overview and a sensible choice of key features. Answers under 150 words lose marks there. There is no official maximum, but 170 to 200 well-chosen words is a sensible target.

The seven visual types and what to focus on

Identify the type first, because it decides what you compare and which tenses you use. The question bank on this site groups every Cambridge IELTS 10 to 21 Task 1 question by these types, so you can practise one type at a time.

• Bar chart: compare categories, and changes between years if there are several. Name the highest and lowest bars and any category that changes position.
• Line graph: focus on trends over time. Give the overall direction, the peaks and lowest points, and where lines cross. Group lines that behave in a similar way.
• Pie chart: describe proportions. Rank the largest and smallest segments. If there are two or more pies, compare how each segment changes between them.
• Table: pick the highest, lowest and most surprising values instead of reading across every row. Group rows or columns that show a pattern.
• Multiple charts: two or more different visuals, such as a bar chart and a pie chart. Link them, for example by connecting a trend in one with a share in the other, and check the unit of each.
• Map: usually two maps of the same place at different dates. Describe what was added, removed, replaced or moved, using location language such as north of, next to and opposite.
• Process diagram: a sequence of stages, natural or manufacturing. Describe the stages in order using the passive and sequence words. There are no trends to compare, so state the number of stages and the first and last stage in the overview.

The four-paragraph structure

A reliable plan for most Task 1 answers has four paragraphs. It is easy for an examiner to follow and quick to write in 20 minutes.

• Paragraph 1, introduction: one or two sentences that paraphrase the question. Change the vocabulary and sentence structure, and keep the place, time period and unit.
• Paragraph 2, overview: two or three sentences giving the main trends, differences or stages. No detailed figures.
• Paragraph 3, detail: the first group of key features, supported with accurate figures.
• Paragraph 4, detail: the second group of key features, with figures and comparisons.

How to write the overview

The overview answers one question: what is the most important thing a reader should know about this data? Look at the whole visual and write the big picture. Placing it straight after the introduction is the safest habit, because the examiner finds it at once.

For a line graph with the introduction "The graph shows the percentage of households with internet access in four countries from 2000 to 2020", a good overview is: Overall, internet access rose in every country, and Country A stayed the highest throughout, while Country D, which started lowest, narrowed the gap. For a static chart: Overall, housing was the largest expense for every age group, whereas leisure was consistently the smallest. For a process: Overall, the process has five stages, beginning with the collection of raw materials and ending with packaging.

In the public band descriptors, Band 7 for Task Achievement includes a clear overview of the main trends, differences or stages, while Band 5 describes an answer with no clear overview.

• Include two or three main features, usually the biggest trend and the biggest difference.
• Use almost no numbers. Figures belong in the detail paragraphs.
• Do not repeat the introduction, and do not explain or judge.

Selecting, grouping and comparing data

You cannot report every number in 20 minutes, and you should not try. Select the features that tell the story: the highest and lowest values, the biggest change, the starting and ending points, and any crossover. Then group items that behave alike, for example the two categories that rose and the two that fell, so each detail paragraph has a clear theme.

Use past tenses for past dates, the present simple when there are no dates, and future forms for forecasts. A typical detail sentence: Sales of electric cars climbed steadily from about 2 million in 2010 to 9 million in 2020, whereas petrol car sales declined slightly over the same period.

• Rising: increase, rise, climb, grow. Falling: decrease, decline, drop, fall.
• Stable and extreme points: remain stable, level off, reach a peak of, hit a low of, fluctuate.
• Degree and speed: sharply, dramatically, steadily, gradually, slightly.
• Comparison: higher than, twice as high as, the same as, whereas, while, by contrast.
• Approximation: approximately, roughly, just over, nearly, about.

Mistakes that cap Task Achievement

Most low Task 1 scores come from the same few errors. Check for them in your last few minutes. The computer-delivered test has a live word counter but no spell check, so also check the spelling of any labels you copied from the visual.

• No overview, or an overview hidden in the conclusion with no clear summary of the main features.
• Listing every number instead of selecting key features. This is mechanical description and usually reads as a list.
• Giving opinions or causes. Writing that something happened because of the economy is not in the data, so leave it out.
• Misreading the data: confusing percentages with numbers, using the wrong unit or year, or mixing up categories. Read the title, axes, key and units before you write.
• Writing under 150 words, or leaving out one of the charts, years or map stages.

Common questions

Short answers to the questions candidates search for most often.

• How many words should I write for IELTS Academic Task 1? At least 150. Aim for 170 to 200 words. There is no official maximum, but extra detail costs time you need for Task 2.
• How long should I spend on Task 1? About 20 minutes, leaving about 40 for Task 2, which carries twice the weight.
• Do I need a conclusion in Task 1? No. The overview does that job. A closing sentence that repeats it is not required.
• Can I give my opinion about the data? No. Report only what the visual shows, without opinions, predictions of your own or causes.
• Can I copy words from the question? Copy numbers, names and units, but paraphrase the rest of the sentence in your introduction.

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