IELTS Half-Band Rules: How Four Skills Become One Overall Score
Rounding · Averages · May 2026
Direct answer
Your overall IELTS band is the average of four skill scores, rounded to the nearest half band. Add Listening, Reading, Writing, and Speaking, divide by four, then round: .25 and below rounds down; .75 and above rounds up (e.g. 6.25 → 6.0, 6.75 → 7.0). Individual skills are reported in half bands too. Understanding this math prevents retake surprises when one skill drags the average.
What half bands represent
Construct gap AI measures language surface; examiner measures communicative success
Penalty gap Templates and scripts penalized by humans, ignored by AI
Novelty gap Examiners score first-time performance; you practice repeats
Criterion fusion Examiners cap overall at weakest criterion; AI averages subscores
Rounding examples that matter
| Skill | Typical AI high | Typical examiner low |
|---|---|---|
| Writing | LR/CC | TR, memorization |
| Speaking | Fluency WPM | Development, spontaneity |
| Listening | N/A (practice apps) | Timed retrieval under distraction |
Framework: plan moves in half-band units
- Identify which cause applies from blind-task logs.
- Apply cause-specific drill (TR outlines, blind Speaking, etc.).
- Re-test with calibration offset.
- Track whether gap shrinks over three blind cycles.
Key takeaways
- Overall = average of four skills, rounded to nearest 0.5—rarely random examiner mood.
- .25 down / .75 up thresholds decide many visa cutoffs
- A 0.5 overall change often equals one skill moving half a band
- Pair with Band 6 meaning for descriptor context
FAQ
Raw correct answers convert to band tables (whole or half); those bands enter the overall average.
No—overall is only reported in 0.5 steps after rounding.
Most tools mimic half bands; calibrate because AI can mis-round borderline Writing/Speaking.
Calculate which single skill move unlocks your next half band.
Get Band Reality Check →