Task 1: the overview sentence
8 min
IELTS band descriptors for Task 1 mention one feature by name: the overview. An overview is one or two sentences that state the main pattern of the whole chart — what goes up, what goes down, what dominates — without quoting any specific figures. A response with accurate details but no overview is capped at band 6 for Task Achievement, while a clear overview is the single fastest route to band 7. The overview usually starts with a signpost word such as 'Overall,' and answers one question: if a reader saw nothing but your sentence, would they know the chart's story?
To find the overview, ignore individual bars and points. Ask three questions in order: (1) What is the overall direction — rising, falling, or stable? (2) Which category is highest or lowest for most of the period? (3) Is there a crossover — a moment where two lines swap positions? Any two of these answers, joined in one sentence, make a complete overview. Two common mistakes to avoid: copying a number into the overview ('rose to 45%') — numbers belong in the detail paragraphs — and listing every category one by one, which is description, not overview.
Worked example
Chart: percentage of households owning a car in three regions (North, Central, South), 1990-2020. North: 30% → 85%. Central: 45% → 60%. South: 70% → 65%. Overview written by a candidate: "Overall, car ownership rose in the North and Central regions while declining slightly in the South, with the North overtaking both other regions to become the highest by the end of the period."
This overview works because it answers question (1) — direction for each group — and question (3) — the crossover, the North overtaking the others. It contains no figures at all: 'rose', 'declining slightly', and 'overtaking' carry the story. Every number (30%, 85%…) is saved for the detail paragraphs, where it belongs.