IELTS Writing Task 1 Mixed Charts: Structure, Strategy, and Band 9 Sample

What Are Mixed Charts in IELTS Writing Task 1?

A mixed charts question presents two different visualisations together — for example, a bar chart paired with a pie chart, or a line graph accompanied by a table. Both visuals describe the same broad topic from different angles, and your task is to summarise the key features of both and, crucially, to show the relationship between them.

Mixed charts appear exclusively in IELTS Academic Writing Task 1. They are considered the most demanding Task 1 format because they require you to integrate data across two structures rather than describing a single visual from start to finish. According to Cambridge Assessment English examiner reports (2024), mixed charts appear in approximately 20-25% of Academic Task 1 papers — frequent enough that every Academic candidate should prepare specifically for this format. Candidates who treat the two visuals as completely independent responses consistently score lower on Task Achievement than those who write an integrated comparison.

Understanding how your Task 1 band contributes to your overall Writing score is also important context. The IELTS Writing band score calculation guide explains the two-thirds rule in detail: Task 1 carries one-third of the total Writing mark, so a strong Task 1 performance meaningfully supports your overall target band.

The Most Common Mixed Chart Combinations

Not all pairings appear with equal frequency. Knowing which combinations are most likely helps you practise the right integrating language and structural approach.

In every case, the connection between the two visuals is the most important thing to establish in your overview. The bar chart and pie chart may show energy consumption levels alongside the proportional breakdown of energy sources; the line graph and table may track overall export growth with a breakdown by destination. Identifying the logical link before you begin writing shapes the entire response.

How to Structure a Mixed Chart Response

The four-paragraph structure that works for single charts applies to mixed charts too, with one critical modification: your overview and body paragraphs must reference both visuals. A response that fully describes Chart A and then fully describes Chart B without connecting them does not satisfy the Task Achievement criterion, which requires you to “cover the requirements of the task” — and the task, by including two charts, implicitly requires you to show the relationship between them.

Writing a strong overview for both visuals is the structural priority. If you are uncertain how to identify the key trends to include in an overview, the overview paragraph guide walks through the technique for every chart type. For mixed charts, apply the same principle twice — one overview sentence per visual — and then add a third sentence explicitly connecting them.

Step-by-Step Writing Process for Mixed Charts

Step 1 — Identify the shared topic (2 minutes)

Read the titles of both visuals. What phenomenon do they both describe? For example: “Chart A shows total electricity consumption in Country X from 2000 to 2020. Chart B shows the proportional breakdown of energy sources in Country X in 2020.” The shared topic is electricity in Country X. This shared topic becomes the subject of your introduction.

Step 2 — Identify the connection (2 minutes)

Ask: what does Chart B tell us that Chart A cannot, or vice versa? In the example above, Chart A tells you how consumption changed over time; Chart B tells you what the energy mix looked like at the end of that period. The connection is: the overall growth seen in Chart A can be interpreted in the context of the source composition shown in Chart B. This connection sentence belongs in your overview.

Step 3 — Write the introduction (2 minutes)

Paraphrase both chart titles in one sentence. Name both chart types. Do not use figures yet.

Weak: “The charts show electricity in a country.”

Strong: “The bar chart illustrates the total electricity consumed in Country X across five-year intervals between 2000 and 2020, while the pie chart shows the proportional breakdown of energy sources for that country in 2020.”

Step 4 — Write the overview (3 minutes)

State the most significant trend from each visual and link them. No specific figures in the overview — reserve those for the body paragraphs.

Strong overview: “Overall, electricity consumption in Country X rose consistently throughout the period. By 2020, despite this growth, renewable sources still accounted for less than a third of the total energy mix, with fossil fuels remaining dominant.”

Step 5 — Write Body Paragraphs 1 and 2 (8 minutes)

In Body Paragraph 1, describe the bar chart (Chart A): quantify the trend with two or three specific data points. In Body Paragraph 2, describe the pie chart (Chart B): report the proportions of the three or four largest segments. Close Body Paragraph 2 with a linking sentence that explicitly connects the pie chart findings to the growth shown in Body Paragraph 1. This linking sentence is the mark of an integrated response and a key differentiator for band 7 and above.

Band 9 Sample Answer with Annotations

Prompt:“The bar chart below shows the total volume of coffee exported from five countries in 2010, 2015, and 2020. The pie chart shows the proportion of total global coffee exports contributed by each country in 2020. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.”

Introduction:The bar chart tracks total coffee export volumes for five major producing nations across three points between 2010 and 2020, while the pie chart illustrates each country’s share of global exports in the final year of the period.

Annotation: Both chart types are named (bar chart, pie chart) and both subjects are captured (export volumes over time; export share in 2020). The sentence is paraphrased — “tracks” replaces “shows”, “three points” paraphrases the three grouped bars, and “final year” replaces “2020”. No figures in the introduction.

Overview: Overall, Brazil dominated both in volume and market share throughout the period, with its exports rising more sharply than any other country. By 2020, Brazil and Vietnam together accounted for more than half of all global coffee exports, while the remaining three countries held comparatively modest shares.

Annotation: The overview references both visuals. The first sentence draws on the bar chart trend; the second draws on the pie chart composition. The connection — Brazil’s dominance is confirmed by both measures — is made explicit without using figures. This is exactly the type of cross-chart synthesis that distinguishes band 7+ responses from band 5–6 responses (Cambridge Assessment English Band Descriptors, 2024).

Body Paragraph 1 (Bar chart):Brazil’s export volume grew from approximately 1.8 million tonnes in 2010 to 2.6 million tonnes in 2020, an increase of nearly 45%. Vietnam showed the second-fastest growth, rising from around 1.1 million to 1.7 million tonnes over the same period. By contrast, Colombia, Indonesia, and Ethiopia each recorded more modest increases of between 5% and 18%, with Ethiopia remaining the smallest exporter across all three years at under 0.5 million tonnes.

Annotation: Three data points are selected from the bar chart — the highest and fastest-growing country (Brazil), the second-largest growth story (Vietnam), and the contrasting group of slower-growing countries. This is selective reporting — not every bar is described, only the features that illuminate the key trend identified in the overview. Specific figures are used but approximated (“approximately”, “around”, “under”), which demonstrates confident data reading without false precision.

Body Paragraph 2 (Pie chart + link): The 2020 pie chart confirms the dominance of Brazil and Vietnam, which held 36% and 19% of global coffee exports respectively — a combined share of 55%. Colombia accounted for roughly 13%, while Indonesia and Ethiopia contributed 11% and 5%. Significantly, the two countries that drove the largest volume increases in the bar chart — Brazil and Vietnam — were also the countries whose combined export share exceeded that of the remaining three nations, reinforcing the concentration of global coffee supply in these two markets.

Annotation: The pie chart data is reported concisely with the four largest segments covered and the smallest noted. The final linking sentence is the critical integration move — it explicitly connects the growth trend from Body Paragraph 1 to the market share data in Body Paragraph 2. This sentence alone is a Band 7+ marker for Task Achievement. It cannot be written without understanding both charts.

Vocabulary for Mixed Chart Comparisons

Mixed chart responses require language that both describes individual charts and connects them. Building a set of linking phrases beforehand prevents the most common error: describing each chart in isolation.

Introducing each chart in the body

• As shown in the bar chart, …
• The line graph reveals that …
• According to the pie chart, …
• The table indicates that …
• Turning to the [second/accompanying] chart, …

Linking data across both charts

• This finding is reflected in the [pie chart / table], which shows …
• The [line graph / bar chart] trend is consistent with the [pie chart] data: …
• Correspondingly, the proportion shown in the pie chart confirms …
• The growth depicted in the bar chart is further contextualised by …
• These figures align with the breakdown provided in the [second visual].

Overview language for mixed charts

• Overall, [Chart A trend], while [Chart B shows / reinforces / contrasts with] …
• In general, the [dominant pattern] is clear from both visuals: …
• Taken together, the charts show that …
• The most striking feature across both visuals is …

Comparison and contrast language

• While the bar chart highlights …, the pie chart instead focuses on …
• In contrast to the [upward trend] shown above, …
• The pie chart, however, adds a further dimension by revealing …
• Despite the growth seen in [Chart A], [Chart B] demonstrates that …
• Although [A] rose significantly, [B] remained / fell / shifted towards …

Common Mistakes with IELTS Writing Task 1 Mixed Charts

Treating the two charts as completely separate responses

The most damaging error is writing a full description of Chart A, inserting a paragraph break, then writing a full description of Chart B — with no connection between them. This approach fails the implicit Task Achievement requirement that you make comparisons “where relevant.” When two charts share a topic, a comparison is always relevant. Cambridge Assessment English (2024) confirms that responses that describe both charts but make no cross-chart comparison cap at band 5-6 for Task Achievement.

Writing an overview for only one visual

An overview that covers only the dominant trend from Chart A, ignoring Chart B entirely, is an incomplete overview. Band 7 requires “a clear overview of main trends, differences or stages” — this applies to all data in the task, not just the primary chart. Writing a two-sentence overview that covers both visuals is the minimum requirement for Task Achievement at band 7 (Cambridge Assessment English Band Descriptors, 2024).

Spending disproportionate time on one chart

Some candidates write 120 words about the bar chart and only 30 about the pie chart (or vice versa). Both charts contribute to the task. Under-describing one visual means the task is only partially addressed. A rough equal split across the two body paragraphs — 65–75 words each — ensures both charts receive sufficient coverage.

Failing to name both chart types in the introduction

Introducing a mixed task as “the charts below show” without naming the chart types misses an easy demonstration of Lexical Resource. Name both types precisely — “the bar chart and pie chart below illustrate” — as this signals accurate data literacy to the examiner from the first sentence.

Reporting every data point rather than key patterns

Mixed chart questions often contain more data than a single chart because there are two visuals to cover. Candidates who try to report every figure consistently run out of the 150-word minimum before finishing, producing thin coverage of each chart. The solution is the same as for single charts: select the highest, lowest, most notable, and most contrasting values — and synthesise rather than list. IDP Education examiner notes (2024) confirm that responses achieving band 7 Task Achievement on mixed chart questions average fewer data points per paragraph but significantly more analytical synthesis than band 5-6 responses.