1. The CLB 9 → CLB 10 payoff, per ability

CRS first-official-language points are awarded per skill: CLB 9 = 31 points per ability (29 with an accompanying spouse/common-law partner); CLB 10+ = 34 per ability (32 with spouse). So a full CLB 9 → CLB 10 jump is worth +3 points per ability = +12 CRS total for a single applicant, +8 with a spouse.

2. The exact IELTS GT bands for CLB 10

Listening 8.5, Reading 8.0, Writing 7.5, Speaking 7.5. Against CLB 9 (Listening 8.0, Reading 7.0, Writing 7.0, Speaking 7.0), every skill needs exactly one half-band more. IRCC scores each ability at its own CLB — mixed CLBs are fine; you keep the points for every skill you lift.

3. What "one half-band more" actually costs, per skill

  • Listening 8.0 → 8.5 is the cruelest of the four — at that level it's about 2 more correct answers out of 40, and the errors left are the distractors designed to catch you, not the ones you've already fixed.
  • Reading 7.0 → 8.0 is the cheapest gain on paper — time management plus Not-Given discipline — and it's the skill most CLB-9 candidates can actually move.
  • Writing/Speaking 7.0 → 7.5 is the highest-variance move — examiner judgment at 7.5 is real, and retake luck swings wider there (see our retake decision rule).

4. When it's worth chasing

Your CRS sits within ~12 points of the last few draw cutoffs and everything else in your profile is maxed (age, education, work experience can't move). Single applicants get the full 12; spouses get 8, so the math is thinner for couples. Category-based draws (trades, STEM, French) also reset what "competitive" means — check your draw type before grinding bands.

5. When it's NOT worth it

A retake costs roughly CA$340 in Canada, and Writing/Speaking half-bands are the noisiest scores to chase. Compare the alternative: the French-language bonus can add up to 50 additional CRS points (French CLB 7+ with English at CLB 5+), and even basic French (NCLC 7) unlocks the French-category draws with far lower cutoffs. For most candidates stuck at CLB 9, a French test has a better points-per-dollar ratio than a fifth IELTS sitting.

The honest bottom line

CLB 9 (8777) remains the target — it's where the big jump already happened (CLB 8→9 is +32 points; CLB 9→10 is only +12). CLB 10 is a stretch play for candidates already at the top of their profile, not the main event.

Not sure which skill is closest to the next half-band? Run the free diagnostic to find out — then decide if the retake is worth CA$340. Related reading: IELTS score validity and the 2-year expiry trap and the CLB converter.

Fact-check anchor: 31/34 (single) and 29/32 (with spouse) per-ability CRS figures and the IELTS GT to CLB 10 mapping (8.5/8.0/7.5/7.5) per IRCC's CRS criteria grid and language-test equivalency chart — verify the live wording on IRCC's pages before quoting.