IELTS Writing Task 1 Academic: Chart and Graph Guide

IELTS Writing Task 1 Academic gives you one or more graphs, charts, tables or diagrams and asks you to describe, summarise or explain the information in your own words. You write a factual report, not an essay, and IELTS scores it against four criteria, one of which, Task Achievement, is specific to Task 1. This guide covers the prompt types you meet, the structure every high-scoring report follows, the timing and word count rules, the scoring criteria in the official band descriptors, and the mistakes which cost marks under Task Achievement.

Task 1 sits inside the same 60-minute Writing test as Task 2, and the two tasks are not weighted the same in your final score. Getting the report format right early protects your Writing band even on a demanding Task 2 day, and each task carries its own minimum word count you are penalised for missing: 150 words for Task 1 and 250 words for Task 2.

Task 1 Academic Prompt Types

IELTS defines the Task 1 Academic prompt as one or more graphs, charts or tables to describe, summarise or explain, or a diagram of an object, device, process or event to describe or explain how it works. Every prompt on test day falls into one of these two groups.

Whichever format appears, your task stays the same: identify the overall pattern first, then support it with selected data points instead of a list of every number on the page. If you are sitting the General Training test instead, Task 1 asks for a letter rather than a data report. Read our guide to the General Training Task 1 letter for the differences.

Required Structure: Overview, Key Features, Data

Every high-scoring Task 1 report follows the same three-part structure, whatever the prompt format.

1. Overview: one or two sentences near the start of your response stating the main trend, the biggest change or the overall pattern.
2. Key features: the two or three most significant points in the data, selected rather than listed exhaustively.
3. Data support: specific figures, dates or comparisons which back up each key feature you mention.

Leaving out the overview costs marks under Task Achievement. The official Band 5 descriptor for Task 1 describes responses where selected key features are not adequately covered and data supporting the description is sometimes missing entirely. An overview backed by real numbers is what separates a Band 5 report from a Band 6 or 7 one.

Timing and Word Count

IELTS sets a separate minimum word count for each Writing task inside one combined time limit.

The two recommended times add up to the full 60-minute Writing test, so overrunning on Task 1 takes minutes directly away from Task 2. Task 1 needs a minimum of 150 words and Task 2 needs a minimum of 250 words. Fall short of either minimum and your response is penalised.

Short responses carry a harder penalty than a slow start: responses of 20 words or fewer are rated Band 1 on every criterion. Task 2 also outweighs Task 1 in your final score, since Task 2 contributes twice as much as Task 1 to the overall Writing band. Protect the full 20 minutes for Task 1, then move to the essay. Read our IELTS Writing Task 2 guide for the essay half of the test.

Scoring Criteria: Task Achievement, Coherence, Lexical Resource, Grammar

Four criteria score Task 1 Academic, each weighted equally, so weakness in one area caps your band regardless of strength elsewhere.

• Task Achievement: how fully your response covers the task requirements, including the overview and selected key features.
• Coherence and Cohesion: how logically your ideas are organised and linked between sentences and paragraphs.
• Lexical Resource: the range and accuracy of the vocabulary you use to describe data and trends.
• Grammatical Range and Accuracy: the range and accuracy of the grammar structures you use.

Task Achievement replaces Task Response, the equivalent criterion used for Task 2, because Task 1 asks you to report data rather than argue a position. The table below paraphrases how the official descriptors describe a Task Achievement response at each band.

See our IELTS scoring guide for how the four Writing criteria roll into your overall band, alongside Listening, Reading and Speaking.

Common Mistakes to Avoid

Three mistakes repeat across low-scoring Task 1 Academic reports, and each maps directly onto the Task Achievement criterion above.

• Skipping the overview: a report which jumps straight into detail without stating the main trend lands at Band 5 or lower on Task Achievement, because the Band 6 descriptor requires a relevant overview to be attempted.
• Listing every data point: describing every number on the chart instead of selecting two or three key features turns paragraphs into a numeric list rather than a report.
• Using opinion language: Task 1 asks you to describe or explain data, not argue for or against it. Phrases like I believe and I think belong in Task 2, not here.

Fix these three habits before test day: write the overview first, choose your key features deliberately, and keep the language factual throughout. Our IELTS practice tests and Writing drills are free with no signup, so you are able to draft full Task 1 reports under real timing and check them against the band descriptors above.

Sources

• IELTS: Academic test format, Writing
• IELTS Writing band descriptors, Task 1 (PDF)