TFSA overcontribution CRA waiver strategy

If you’ve just discovered you put too much money into your Tax-Free Savings Account, don’t panic. It’s one of the most common tax slip-ups the CRA sees every year, and in many cases the penalty can be reduced or waived entirely — provided you act quickly and follow the right process.

Here’s what you need to know, and how Common Accounting Corp. can help.

How the TFSA Over-Contribution Penalty Works

Every dollar you contribute to your TFSA beyond your available contribution room becomes an “excess TFSA amount” under the Income Tax Act. The CRA taxes that excess at 1% per month for every month it remains in the account — and importantly, being over the limit for even a single day in a given month triggers tax for that entire month.

Most people don’t find out they’ve over-contributed until the CRA catches it. Financial institutions report TFSA transactions at year-end, and the CRA typically sends an “Excess TFSA Amount” letter along with a Proposed TFSA Return sometime between June and September for the prior tax year. You don’t have to wait for that letter, though — filing proactively once you catch the error is generally viewed favourably.

The Fix: A Five-Step Process

  1. Withdraw the excess immediately. Contact your financial institution and remove the over-contributed funds without delay. The penalty accrues monthly, so every week you wait adds to the cost.
  2. File Form RC243 and Schedule A. These calculate the exact tax owing on the excess amount.
  3. Pay the assessed tax when you file — even if you plan to request a waiver afterward. Paying first stops additional interest from accumulating while the CRA reviews your request.
  4. Request relief under section 207.06. If the excess arose from a genuine, honest mistake and you corrected it promptly, the CRA has discretion to cancel or waive the tax. This means writing a clear letter explaining what happened and what you did to fix it.
  5. File Form RC4288 (Request for Taxpayer Relief) alongside your letter, and mail or submit the package to your CRA Tax Centre or through CRA My Account.

Processing typically takes several weeks to a few months, and the CRA reviews each request on its own facts.

What Counts as a “Reasonable Error”?

The CRA is generally sympathetic to first-time, honest mistakes — for example, believing a withdrawal restored contribution room within the same calendar year, or a duplicate contribution caused by an institution or platform error. What matters most is that the mistake was unintentional and that you corrected it as soon as you became aware of it. Speed and a clear, honest explanation go further than complicated legal language.

Why Work With an Accountant on This

A TFSA over-contribution letter from the CRA can feel alarming, but the process for resolving it is well-established. Where clients often need help is:

  • Calculating the exact excess amount and the tax owing across multiple months
  • Preparing RC243, Schedule A, and RC4288 correctly and completely
  • Drafting a waiver letter that clearly documents the reasonable-error circumstances
  • Making sure nothing is missed before the file goes to the CRA

Common Accounting Corp. has helped Greater Toronto Area clients navigate exactly this situation — from calculating the penalty to preparing a complete waiver package.

Received a CRA letter about your TFSA, or think you may have over-contributed? Contact us for a review before you file anything.

📞 (416) 840-3799 | ✉️ taxinfo@commonaccounting.com | commonaccounting.com

This post is general information, not personalized tax advice. Every situation is different — speak with an accountant about your specific circumstances before taking action.