A Business Owner Has Died. Which Tax Returns Does the Family Have to File?

The short list: three filings that always exist, and two that might

Every estate of a business owner faces the same core stack. First, a final T1 personal return for the year of death, reporting income from January 1 to the date of death plus everything death itself triggers. Second, a T3 trust return for the estate, because the moment someone dies their assets sit in a new taxpayer, the estate, which earns income until everything is distributed. Third, the corporation's T2 returns, payroll remittances and HST filings, which continue on their normal schedule regardless of what happened to the shareholder.

Two more filings are optional but worth knowing about. The executor can file a separate return for rights or things, which moves certain income earned but unpaid at death onto its own return with its own tax brackets and credits. And before the estate distributes its final dollar, the executor should request a clearance certificate from the CRA, which is not a return but a formal confirmation that the deceased's and the estate's taxes are settled. Distributing without one leaves the executor personally exposed for unpaid tax.

If a family trust was part of the structure, add its T3 to the list, and if the corporation is wound up as part of the estate plan, add a final T2. The rest of this page walks each filing in turn, then puts the deadlines side by side, because the deadlines are where grieving families get hurt. None of this requires you to become a tax expert. It requires someone on the file who already is, usually alongside the estate lawyer.

The final T1: where the deemed disposition of the shares lands

The final T1 is where the tax system settles up with the person who died, and for a business owner the largest number on it is usually a sale that never happened. Canadian tax law treats death as a disposition: the deceased is deemed to have sold their capital property, including private-company shares, at fair market value immediately before death. The gain between what the shares cost and what they were worth is a capital gain on the final return, even though no money changed hands and the company carries on as before.

That deemed sale has two immediate consequences. The estate needs a supportable valuation of the private-company shares, because you cannot report a gain on a value nobody has established, and the CRA can challenge a number pulled from the air. And the family should ask early whether the shares were qualified small business corporation shares, because the lifetime capital gains exemption, up to $1.25 million of gain per person, may shelter some or all of the deemed gain if the company met the tests.

The big exception is the spousal rollover. Shares that pass to a surviving spouse, or to a qualifying spousal trust, roll over at the deceased's cost, and the deemed gain disappears from the final return and waits until the spouse sells or dies. This is why "who inherits the shares" and "what tax is owed now" are the same question, and why the will has to be read before the return is prepared. Farm property has its own intergenerational rollover rules on top of this, which matters for families like the ones we work with on farm business structures.

The deadline depends on the date of death. If the person died between January 1 and October 31, the final T1 is due April 30 of the following year; if they died in November or December, it is due six months after the date of death. Balances owing carry interest from the due date, so an estate short on cash needs to see the number early, not at the deadline.

The optional return most families never hear about

A return for rights or things exists to tax certain income more gently, and executors routinely miss it. Rights or things are amounts the deceased had earned or become entitled to before death but had not yet received: a dividend declared but unpaid at death, unclipped bond coupons, certain unpaid salary. The executor can elect to report these on a separate return instead of piling them onto the final T1.

The point of the election is arithmetic. A separate return starts at the bottom of the tax brackets again and gets its own set of certain personal credits, so income that would have been taxed at the deceased's top marginal rate on the final return can be taxed at low rates on its own return. For an owner whose corporation had declared a dividend shortly before death, the difference can be meaningful, and the election costs nothing but paperwork.

The deadline is generous but specific: the later of one year after the date of death and 90 days after the CRA assesses the final return. The practical takeaway for a family is simpler than the rule. Tell the accountant about anything the deceased was owed but had not received, and let them decide whether the election pays. This is exactly the kind of item that gets found in a proper review and lost in a rushed filing.

The estate's T3: a new taxpayer the family did not know it created

The estate itself becomes a taxpayer on the day of death, and it files a T3 trust return for the income it earns while it exists. Dividends the corporation pays after death, interest on estate bank accounts, gains on anything the estate sells: all of it belongs to the estate, not to the deceased and not automatically to the heirs. The T3 is due 90 days after the estate's year-end.

Most estates should be designated a graduated rate estate on the first T3. That designation, available for up to 36 months after death, lets the estate pay tax at graduated rates like an individual instead of at the top rate from the first dollar, and it can choose an off-calendar year-end, which gives the executor some control over timing. It also opens specific post-mortem tools: the election under subsection 164(6), which can carry a loss realized by the estate in its first year back against the deemed gain on the final T1, is only available to a graduated rate estate.

That last point deserves a plain-language flag, because it is the one with a hard clock. When a shareholder dies holding private-company shares, the estate can face tax twice on the same value, once on the deemed gain at death and again when cash is later pulled out of the company. Post-mortem planning, the 164(6) loss carryback or a pipeline structure at a high level, exists to collapse that double tax, and parts of it only work inside the first taxation year of the estate. This is why the corporation question and the estate returns cannot be handled by different people who never speak, and why we treat post-mortem planning as a first-year conversation, not a someday one.

T3 returns now also carry expanded beneficial ownership disclosure, identifying trustees, beneficiaries and other parties. If the deceased had a family trust in the structure, that trust keeps filing its own T3 as well, and the deceased's death may itself change who its beneficiaries are. The estate return and any trust returns should sit with one preparer for exactly that reason.

The corporation's filings do not stop, and someone must be able to sign them

The company's T2 corporate return stays due six months after its year-end, with the balance owing earlier, and payroll and HST remittances keep their normal schedules, death or no death. The CRA does not pause a corporation's obligations because its shareholder died, and late remittances attract penalties that the estate ultimately eats. The immediate practical question is therefore authority: who can sign for the company, run its bank account and file its returns.

If the deceased was the sole director, the corporation may have no directors at all until the shares pass to the estate and the executor, once probate or the corporate records allow, elects a new one. Until that is fixed, nobody can validly authorize filings, pay staff or renew financing. Getting the executor recognized, the share register updated and a director in place is legal work, and it belongs at the top of the list alongside the tax filings, which is why we coordinate directly with the estate lawyer on every one of these files rather than working in sequence.

Then comes the real decision, which is what the corporation's future is: carried on by family, sold, or wound up. Each path has its own filing tail. A sale needs the valuation work already done for the deemed disposition. A wind-up ends with a final T2, the closure of payroll and HST accounts, and its own clearance certificate. Carrying on means the estate or heirs become shareholders and the ordinary compliance rhythm continues under new ownership. The succession question is bigger than this page, and it is the reason estate planning for business owners exists as its own discipline, ideally done while the owner is alive.

The deadlines side by side, and the facts that change the answer

Here is the whole stack in one table, because the deadlines are what an executor actually has to manage:

What changes the answer on any given file comes down to a handful of facts. Whether there is a surviving spouse, because the rollover can remove the deemed gain entirely. Whether the shares qualified for the capital gains exemption, which needs the company's asset mix checked. What the shares are worth, because the valuation drives the biggest number on the final T1. Whether the corporation will be kept, sold or wound up, which sets the post-mortem strategy. And how much time is left in the estate's first year, because the best double-tax fixes expire with it.

The right team is small: the estate lawyer handles probate, authority and the will; a business estate planning CPA in Ontario handles the returns, the valuation support and the post-mortem plan, and the two talk constantly. We do this work as a defined-scope engagement under Strategic Projects, starting with a free 15-minute call to map which of these filings your family actually faces. If the owner in your family is still alive and this page is homework, start earlier than we did with most of our files: when to start estate planning answers that directly.