IELTS Band 9 in Writing Task 1: What the Arithmetic Actually Requires

Band 9 in Task 1 is not a vocabulary problem. It is an arithmetic problem with four inputs, and most pages written about it never do the arithmetic.

This page does it first: exactly which combinations of the four criterion bands produce an overall 9.0, why the common claim that a single band 8 rules out a 9 is wrong, and which of the four criteria is realistically the one holding your answer down. Every band mentioned from our own library is an estimate produced by Bandly's scoring engine, not a mark from a qualified examiner.

How a Task 1 band is actually produced

Task 1 is marked on four criteria, each given a whole number band from 1 to 9: Task Achievement, Coherence and Cohesion, Lexical Resource, and Grammatical Range and Accuracy. The four are added, divided by four, and the result is rounded to the nearest half band. A mean ending in .25 or .75 rounds up.

So the question "how do I get band 9 in Task 1" has a precise answer. You need a mean of at least 8.75, because 8.75 rounds up to 9.0 and 8.5 does not.

The 6,561 combinations, and the 5 that reach 9.0

Four criteria, nine possible bands each, gives 6,561 possible combinations. We ran all of them through the rounding rule this site uses and counted the ones that come out at 9.0.

Five do.

Four of those five contain a band 8. That matters, because several of the pages ranking for this query state that a single 8 on any criterion makes a band 9 impossible. It does not. One 8 and three 9s averages 8.75, which rounds up to 9.0.

What does end it is a second 8. Two eights and two nines gives a mean of 8.5, which is an overall 8.5 and not a 9.0. A single 7 does the same damage: 9, 9, 9 and 7 is also 8.5.

So the real rule is simpler than the myth and stricter than it sounds. Three nines, and your fourth criterion no lower than 8. Anything else is 8.5 or below. Our page on how the writing band is calculated shows the same arithmetic for the whole Writing section, where Task 2 counts double.

What each criterion asks for at band 9

The public band descriptors describe band 9 in similar language for all four criteria: full, consistent, flexible, with only occasional slips of the kind a native writer makes. In plain terms, for Task 1:

1. Task Achievement. Every key feature of the chart, graph, table, map or process is covered, there is a clear overview of the main trend or the main stages, and the data you quote is correct. Nothing invented, nothing left out.
2. Coherence and Cohesion. The reader never has to work out why one sentence follows another. Cohesion is there but you do not notice it, which is the opposite of a paragraph that opens with Firstly and Secondly.
3. Lexical Resource. A wide range used naturally and precisely. Precision matters more than rarity: rose sharply in the right place beats skyrocketed exponentially in the wrong one.
4. Grammatical Range and Accuracy. A wide range of structures with full flexibility, and error free sentences as the norm rather than the exception.

Note what is absent from all four. There is no mention of length beyond the 150 word instruction, no mention of how many paragraphs, and no list of required phrases. A page that sells you twenty band 9 phrases is selling something the descriptors do not ask for.

Which criterion really blocks it

Here is what the ranking pages do not show you. We counted the four criterion bands recorded for every Task 1 answer published in Bandly's sample library, both Academic and General Training, eight answers in total.

Task Achievement came back at 8 or 9 on all eight. The other three criteria never once reached 8. The highest overall estimate in the set is 7.5, and the reason is always the same: the content was handled and the language was not.

Two cautions. Eight answers is a small set, and these are estimates from an engine whose bands have not been compared against a qualified examiner's marks, so the Task Achievement figures say something about how our engine marks that criterion as well as about the answers. Treat the pattern as a hint about where to look, not as a measurement of the exam.

Even so, the pattern is the useful part. Everyone writing about band 9 Task 1 concentrates on Task Achievement, on selecting key features and writing a good overview, because that is the criterion unique to Task 1. It is also the criterion these answers already handled. The three that stalled at 6 and 7 are the three that are nothing to do with charts.

What that means for how you practise

If Task Achievement is the easiest of the four to lift and the other three are the ceiling, then more chart practice is the wrong next step once you can reliably write an overview.

What moves the other three:

1. Coherence and Cohesion. Rewrite a finished answer and delete every Firstly, Secondly and Moreover, then make the sentences connect through their subjects instead. The note on one of our 7s said exactly this: the devices were appropriate but predictable. Our post on the Task 1 overview sentence shows where that sentence sits in the answer.
2. Lexical Resource. This is the lowest criterion in the table, and the fixes are unglamorous: countable and uncountable nouns, the right preposition after a verb, one word for a trend rather than three. Range comes after accuracy, never before it.
3. Grammar. Count the error free sentences in your last answer as a fraction of all sentences. At band 7 most sentences are clean; at band 9 almost all are. That fraction is a better progress measure than the number of complex structures you managed to fit in.

A worked opening at the top of our range

This is the opening of the bar chart answer in the table above, the one estimated at 7.5 overall with Task Achievement at 9. The prompt asked for the percentage of commuters using four types of transport in three cities in 2023.

The bar chart illustrates the proportion of commuters utilizing four modes of transportation, namely train, bus, car, and bicycle, across three distinct cities of Tokyo, Amsterdam, and Houston in the year 2023. Overall, there are stark contrasts in commuting preferences among the three urban areas. Tokyo is heavily dominated by train travel, Amsterdam shows a strong preference for cycling, and Houston is overwhelmingly reliant on cars, while bus travel remains relatively unpopular in all three locations.

That is what a 9 on Task Achievement looks like. One sentence paraphrasing the prompt without copying it, then an overview that names the main pattern in each of the three cities and one pattern shared by all three, with no figures quoted yet and nothing invented. The figures arrive in the body paragraphs, where every one of them matches the chart.

The reason the whole answer came back at 7.5 rather than 9 is in the next paragraphs, not here. The feedback named repeated structures, accounting for and utilized by used again and again, and paragraph openings that announced a city rather than linking to the sentence before. You can read the whole answer with its criterion notes on the Academic Task 1 samples hub, and the band 8 samples hub collects the highest estimates in the library.

What to do today

Take your most recent Task 1 answer and give it four separate marks out of 9 instead of one. For each criterion, write one sentence saying what stopped it being a 9. If three of those sentences are about your English and one is about the chart, you have found the same pattern we found in eight answers, and you know which one to spend the next week on.

When you want a second opinion on the split, paste the answer into Bandly and it will estimate each of the four criteria separately, which is the only way to see which of the four is capping the other three.