The short version

  • Retaking the full IELTS in Canada costs about C$360 (same as the first attempt) at both IDP and British Council.
  • If only one skill is holding you back, IELTS One Skill Retake exists — you redo just that module (Listening, Reading, Writing, or Speaking) at a lower fee than a full retest, from an eligible test. Caveat for immigration: IRCC does not accept One Skill Retake for Express Entry (their words: "We don't accept the One Skill Retake version of the IELTS General Training test") — so if the score is going into an Express Entry profile, a full retest is the only option. One Skill Retake is accepted in a few selective programs (e.g., the Economic Mobility Pathways Pilot) and many schools accept it for admissions — always confirm against your specific program.
  • There is no mandatory wait between attempts. Results: computer-delivered ~48 hours, paper ~5 days — same as the first time.
  • Scores stay valid for 2 years for immigration; your Express Entry profile needs a test still valid at the time you submit it, not just when you enter the pool.