Worth Knowing
Growth doesn't use up room. If your TFSA has grown to double what you put in, your contribution room is unchanged – room is measured by deposits, never by account value. And if you withdraw growth, that full amount comes back as new room the following January.
The January 1 rule. Money you withdraw this year doesn't create room until next January 1. Re-contributing it in the same calendar year – without unused room to cover it – is the single most common TFSA penalty the CRA assesses.
Over-contributions cost 1% per month. The CRA charges 1% of the highest excess amount in the account for each month it stays there, until withdrawn.
CRA My Account can be stale. Financial institutions report TFSA activity to the CRA once a year, so the "contribution room" figure on CRA My Account is usually calculated as of the previous December 31 – it will not reflect this year's contributions or withdrawals. Keep your own running total.
Non-resident years don't accrue room. Contributions made while a non-resident of Canada also draw the same 1%-per-month penalty. If your residency has changed, get advice before contributing.