Overall 6.5 with no less than 6 in each: what the second number does

A requirement written as "overall 6.5 with no less than 6.0 in each component" is two tests, not one, and the second is the one that sends people back for a retake. The overall band is an average, and averages are generous: they let a strong Reading score carry a weak Writing score across the line. The per-skill floor is not generous at all. It looks at your lowest number and nothing else. Candidates read the first half of that sentence, build a plan around lifting their average, sit the test, clear 6.5 overall, and discover that a 5.5 in Writing has quietly voided the whole result. Your weakest skill decides whether you pass. Your average only decides whether that was enough.

Read the requirement before you plan anything

Find the exact wording on the page that will accept your result, not a summary of it — which requirement actually binds you is worth settling before anything else — and split it into the two conditions it contains.

• The overall condition is the mean of your four skill bands, rounded to the nearest whole or half band. The mechanics of that rounding matter more than people expect, because a quarter of a band of arithmetic is often the difference between a pass and a retake.
• The floor condition is a minimum applied to each of the four skills independently. There is no averaging, no trading, no partial credit. One skill below the floor fails the requirement however high the other three are.

Some requirements have no floor at all. A few set a different floor per skill — a higher minimum in Writing or Speaking than in the other three — and some set a floor with no overall band at all. Until you know which shape yours is, you cannot know which skill to work on, and most of the wasted preparation comes from guessing.

Four candidates, one requirement

All four profiles below are assessed against the same thing: overall 6.5, no component below 6.0.

Profile B is the one that stings. An overall 7.0, half a band above what was asked, and the result is unusable. B has strong receptive skills and a single 5.5, and no amount of additional Reading can repair it: the floor does not look at Reading. The only move that matters is Writing 5.5 to 6.0 — one half band, in the weakest skill, with the overall band already carrying slack. That is the cleanest possible case for weighing a single-skill retake against sitting the whole test again.

The smallest fix is not always the weakest skill

Profile C meets every floor and is half a band short overall. The average sits at 6.125; it needs to reach 6.25 to round up to 6.5. That is a single half-band gain in any one of the four skills. So which one?

The instinct is to attack Writing, because 6.0 is the joint-lowest score. That is usually the wrong answer. The cheapest half band in the set is in a skill marked right or wrong: in Listening and Reading the gap between adjacent bands is a handful of raw marks, and those marks are often sitting in timing and question-type familiarity rather than in English ability. Writing 6.0 to 6.5 means moving performance against the assessment criteria under the eye of a human examiner, which is slower and far less predictable work. C's efficient plan is Listening or Reading, whichever your practice scores say is closer, and Writing left exactly where it is.

Profile D has the opposite problem, and no shortcut. Two components sit below the floor, so two half-band gains are required, and both must land in the specific skills that are failing. Pushing Reading to 8.0 moves the average to 6.625 and changes nothing: the verdict is still fail. D's entire preparation belongs in Writing and Speaking, and D should be honest about the time that takes — the published rate is roughly half a band per 200 to 240 hours of instruction, slower above band 6, so two half bands in the productive skills is a serious block of work, not a fortnight of revision.

What this changes about a study plan

A plan built on "raise my overall band" spreads effort across four skills in rough proportion to how weak they feel. A plan built on a two-part requirement is lopsided on purpose. It protects the floor first, because the floor is a hard gate, and it buys the average afterwards from whichever skill sells half a band most cheaply.

One more consequence worth naming: if your weakest skill is already at the floor, as Profile A's Writing is at exactly 6.0, you have no margin there. A single bad morning in that paper fails the requirement outright, even though nothing about your English has changed. When a skill sits level with its floor, treat half a band above it as the real target, and let the average take care of itself.