The most recent Canada Post strike commenced on September 25, 2025. Shortly after, CRA provided an update on the impact, including the following guidance:

• taxpayers are still responsible for meeting their tax obligations, and are encouraged to file or remit electronically;
• communications regarding audits, objections, appeals, disputes or relief requests will continue by telephone and digital services (e.g. online CRA accounts or the Secure drop zone), but written letters will be limited to exceptional circumstances; and
• penalty and interest relief may be granted to those who cannot meet their tax obligations due to circumstances beyond their control.

CRA will continue to update their Canada Post mail service disruption – Impact on CRA services webpage (https://www.canada.ca/en/revenue-agency/news/newsroom/canada-post-mail-service-disruption-impact-cra.html) with the latest information.

On September 29, 2025, Service Canada stated that delays will occur in respect of cheques mailed for Canada disability benefits and employment insurance benefits. CPP and OAS cheques will be delivered, but may be delivered prior to the date on which they can be deposited. They also encouraged the submission of online applications for various programs and registering for direct deposit. They noted that decision letters and other mail-outs for many programs will be affected by the strike.