How to write an IELTS Task 1 overview

Start with the picture, not every number

An overview tells the reader what matters most in the visual. For this chart, the useful questions are: Which mode was most common? What changed over time? Did the differences grow or shrink?

An introduction identifies what the chart shows. An overview selects its main features. Simply rewording the title does not do both jobs.

In the official IELTS Writing band descriptors, the Academic Task 1 criteria for Band 7 include a clear overview and identification of main trends or differences. An overview alone does not determine your score: the complete response is assessed across all four writing criteria.

Find three features worth keeping

Look across all three years before you write:

• Cars remained the largest individual category: 60%, 50% and 40% were each higher than either of the other categories in the same year
• Car use fell while both alternatives increased: bus and bicycle shares rose between each recorded year
• The gap narrowed: cars were only five percentage points ahead of buses in 2020, compared with 35 points in 2010

Be precise about “largest”. Cars were the most common individual mode throughout, but by 2020 buses and bicycles together accounted for more commuters than cars. Saying “most people drove in every year” would be inaccurate: the car share was only 40% in 2020.

A list of figures versus an overview

This first attempt reports accurate details, but leaves the reader to work out the main pattern:

In 2010, 60% travelled by car, 25% by bus and 15% by bicycle. In 2020, the figures were 40%, 35% and 25% respectively.

A more useful overview selects and connects the features:

Overall, cars remained the most common individual mode of transport in all three years, although their share fell. Bus and bicycle use both increased, narrowing the gap with cars.

The second version explains the continuing ranking and the contrasting trends. “Although” connects two facts that could otherwise sound contradictory: cars stayed first while losing share.

These are original teaching examples, not official model answers or a promised band score. The overview is only one part of a full response.

Use the body paragraphs for supporting comparisons

Once the overview establishes the pattern, choose figures that support it. For example:

The proportion commuting by car fell from 60% in 2010 to 40% in 2020, a drop of 20 percentage points. Over the same period, the shares travelling by bus and bicycle each rose by 10 percentage points, reaching 35% and 25% respectively.

The figures are grouped by their relationship rather than copied one by one. You would also consider relevant intermediate data when developing the full report.

Notice percentage points: moving from 60% to 40% is a decrease of 20 percentage points, not a 20% relative decrease. The chart shows shares, so it does not tell us how many individual commuters changed their behaviour.

Avoid adding explanations the chart cannot support

The chart does not say why bus or bicycle use increased. “Residents became more environmentally conscious” may sound plausible, but it introduces information that is not provided. Describe the changes and comparisons you can actually see.

There is no need to memorise a rule that an overview must contain exactly two sentences or must never contain a number. Here, two sentences work well and most figures fit naturally in the body. Placing the overview after the introduction can make the structure easy to follow; it is a useful approach, not a mandatory location.

Try another version yourself

Cover the worked overview and write your own. Keep the same facts, but choose a different structure. You could start with the two growing categories, then contrast them with the declining car share.

Before moving on, check:

• Have I described the whole period rather than just one year?
• Have I identified the main pattern and an important comparison?
• Have I avoided turning “largest category” into “a majority”?
• Can I point to the chart for every factual claim?

For a static chart, look for the largest differences and groupings rather than inventing a time trend. For a process or map, choose the main stages or changes relevant to that visual. The purpose stays the same: help the reader see the main picture.

Next, use the feedback-to-revision routine to improve one paragraph at a time, or explore how four skill scores combine in the IELTS overall band calculator.

Source checked 7 October 2026: IELTS Writing band descriptors, updated May 2023. Chart, data and worked examples created by Fast Prep.