TREADSTONE LAW · ONTARIO · DIGITAL LEGAL SERVICES · EST. MMXXI ·TSL
Licensed by the Law Society of OntarioFlat fees published upfrontWe reply to messages within 1 business daySign in
Home/Articles/Alberta/Wills & Estates
№ 22 Wills & Estates

Final Tax Return Due Date After Death in Alberta

Learn when the final T1 return and any tax owing are due after a death in Alberta, which exceptions apply, and what late penalties and interest can cost.

Wills & Estates5 min readTSLBy the Treadstone Law Team · AlbertaUpdated November 1, 2026
← All articles
Key takeaways
  • The due date for the final return depends on when the person died: April 30 of the next year for deaths January 1 to October 31, and six months after death for deaths November 1 to December 31.
  • A final return must be filed for every person who dies, and the legal representative files it.
  • Late filing with a balance owing brings a penalty of 5% plus 1% for each full month late, and unpaid tax bears compound daily interest.

If you are the executor of someone's estate, one of your first jobs is the final income tax return. The deadline is not the same for every death. It moves depending on the date the person died, and a few special situations change it again.

This article walks through the filing and payment dates, the main exceptions, and what happens if a deadline is missed. These tax rules are federal, so they apply the same way in Alberta as elsewhere in Canada. Your own facts can change the answer, so a lawyer or accountant can confirm your dates.

This article covers the law of Alberta.

Who files, and whether a return is needed

A final T1 return must be filed for every person who dies, and the legal representative of the person who died files it, along with any optional returns. The final return reports the deceased's property, investments and other taxable income, and the legal representative may claim deductions and credits to reduce what the deceased or the estate owes.

The CRA's guidance says a final return must be filed for every person who dies. It does not say the return can be skipped when no tax is owing. Optional returns may also reduce or even eliminate tax, so they are worth discussing with an accountant.

The basic due dates depending on the date of death

The general rule in the Income Tax Act is that an individual's return is due on or before April 30 of the following year. For a death, the date of death decides which deadline you use.

Date of deathFinal return and balance owing due
January 1 to October 31April 30 of the year after death
November 1 to December 31Six months after the date of death, on the same calendar day

The Income Tax Act says the same thing in legal terms: where someone dies after October of the year, the return is due on the later of the normal filing date and six months after the date of death.

If a due date falls on a weekend or a CRA-recognized public holiday, a return is on time if it is received or postmarked by the next business day. A payment is on time if it is received on the first business day after the due date.

Exceptions that change the date

The estate may also need to file a separate T3 trust return, due 90 days after the trust's tax year-end, or the date of final distribution if the trust ceases to exist.

Late penalties and interest

If a final return with a balance owing is filed late, the penalty is 5% of the balance owing, plus 1% of the balance owing for each full month the return is late, to a maximum of 12 months. It may be higher if a late-filing penalty was assessed for any of the three previous years, and interest also applies to the penalty.

Separately, unpaid tax on a deceased person's return bears compound daily interest from the day after the due date until it is paid in full.

A late T3 return may attract a penalty of $25 a day, with a minimum of $100 and a maximum of $2,500, even if nothing is owing.

What to do next

Because dates depend on the facts, a lawyer or accountant can confirm which one applies to your estate.

Frequently asked questions

Is the final tax return due April 30 in every case?

No. April 30 of the following year applies to deaths from January 1 to October 31, but for deaths from November 1 to December 31 the return is due six months after the date of death. Other exceptions apply for business income and for deaths early in the year.

Do I have to file a final return if no tax is owing?

A final return must be filed for every person who dies. The CRA's guidance does not say it can be skipped when no tax is owing.

Does the later filing date also give me more time to pay?

Not always. For a death from November 1 to December 31, the balance owing is due six months after death. For business-income cases, payment is still due on the standard payment due date even though the filing date is later.

What happens if the return is filed late?

With a balance owing, the penalty is 5% of that balance plus 1% for each full month late, up to 12 months, and interest also applies. Unpaid tax also bears compound daily interest from the day after the due date.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Alberta laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a lawyer who practises in Alberta. Reach us at 1-844-900-1070 or send our Team a message.

This is a wills & estates question

Ask our Team for a quote. We reply by email.

ContactStart a File →