TransUnion Canada operates under the same 30-day dispute window as Equifax, and the day-by-day timeline is similar. This guide walks through what the 30 days actually look like, what can extend the window, and what happens at the end.
If you are starting from scratch, see how to dispute with TransUnion Canada online for the submission process.
The 30-Day Standard
TransUnion Canada is required to complete most dispute investigations within 30 days of receiving the dispute. The clock starts at acknowledgment, not submission. For online disputes, acknowledgment is usually within 24 hours.
The 30 days is a ceiling. Simple disputes with strong evidence sometimes close in 7 to 12 days. Complex disputes or disputes involving hard-to-reach furnishers use the full window.
If TransUnion fails to complete the investigation within the legal window, the disputed item must be corrected or removed. This rule is the basis for escalation if an investigation stalls.
Timeline in Practice
Day 1 to 2: TransUnion acknowledges the dispute. You receive confirmation through the consumer portal.
Day 2 to 5: TransUnion transmits the dispute to the data furnisher. For online submissions with clear evidence, this is often faster than the 5-day window.
Day 5 to 25: The furnisher investigates and responds. This is the opaque middle of the process. You do not see progress during this stretch.
Day 25 to 30: TransUnion applies the furnisher's response, updates the report if needed, and issues the written decision.
Some disputes finish well before day 30. A late payment dispute with a major bank and a clean bank statement can close in under two weeks. A collection dispute with a small agency can easily use all 30 days.
Common Delays
Several factors can push TransUnion disputes toward or past the 30-day ceiling.
The furnisher is slow to respond. Small collectors, small lenders, and provincial courts often take the full 30 days available to them under the rule. TransUnion cannot close the dispute faster than the furnisher responds.
Multiple items in one submission. TransUnion investigates each disputed item separately, and the dispute closes when every item has a response. A five-item dispute will take as long as the slowest of the five items.
Mail-based disputes. Mailed disputes add time in both directions. Total time from mailing to receiving the written decision can be 45 to 60 days even though the actual investigation is 30.
Identity theft claims. ID theft cases often trigger supplementary verification (police report verification, identity confirmation, fraud alerts). This can extend the investigation beyond the standard window in limited circumstances.
Checking Status
The TransUnion consumer portal shows the status of any open dispute. Status options are limited to "in progress" or "completed," with occasional additional states for multi-item disputes.
Checking more than once a week is not productive. TransUnion does not update status continuously, and there is no way to see which furnisher is delaying a response.
The one change that matters: when a dispute moves to "completed," the written decision and updated credit report usually arrive within 1 to 3 business days.
Re-Investigation Triggers
A closed TransUnion dispute can be reopened when new material information emerges. "New material information" means documents or facts not available during the first investigation, not just a request to look again.
A re-investigation has its own 30-day window. Submit it through the standard dispute flow and explicitly note that it is a re-dispute with new evidence.
Next Steps After the Response
When the dispute closes, one of three outcomes applies.
Removed. The item is gone from your report. Pull a fresh report to confirm, and if the same item is on Equifax, check whether it was also removed there.
Corrected. The item remains on the report but has been updated. This is common for disputes about specific details (balance, date of last activity, account status) where the underlying account is legitimate.
Verified. The furnisher confirmed the item as originally reported. Your next-step options include re-dispute, direct creditor contact, FCAC for federally regulated lenders, and provincial consumer protection. See TransUnion rejected my dispute, now what.
Using the 30 Days Well
Two habits make the 30-day window work for you rather than just a waiting period.
Start the parallel Equifax dispute if the same error is on both bureaus. Investigations can run on overlapping timelines, so you are not waiting sequentially. The Equifax walkthrough is in how to dispute with Equifax Canada online.
Plan your escalation in advance. Decide before the 30 days are up what you will do if the dispute is verified. Re-dispute with new evidence, or skip to direct creditor contact, or escalate to FCAC. Having the next step ready keeps the total timeline short.
A Second Opinion Is Often Worth 20 Minutes
If you are mid-dispute and want a read on whether the timeline and likely outcome are on track, a short call usually answers both. Call (437) 755-6579. Free initial consultation, 8 languages, flat fee if we work together, no monthly payments.