HATC Filing Mistakes That Put a Renovation Claim at Risk (And What to Do Instead)

Two roles exist under this credit. Confusing them, or assuming you hold one, is the most common way a whole claim loses its footing.

The two roles

A qualifying individual is the person the renovation is for: someone 65 or older at the end of the tax year, or someone eligible for the disability tax credit at any time in that year. An eligible individual is a person allowed to claim on their behalf. According to the CRA's line 31285 guidance, that means a spouse or common-law partner, or a listed relative who claimed, or could have claimed, the eligible dependant amount or a Canada caregiver amount for the qualifying individual. A person entitled to claim the disability amount for them can also qualify.

Notice what is missing from that definition. Being family is not enough. Paying the contractor is not enough. The relative has to fit through one of those dependant-credit doors, and the "could have claimed" versions come with conditions of their own.

What to do instead

Run the tests in order, and write down the answers. Was the person 65 by December 31 of the claim year, or eligible for the disability tax credit during it? If you are claiming for them, which route makes you an eligible individual? If you cannot name the route, stop there. A parent who turned 65 the following February does not make last year's renovation claimable on age.

Our companion piece on aging-in-place renovations, who can claim, and what records matter walks through the claimant comparison in more depth.

The dwelling test is where well-meant family arrangements break. It asks two questions at once: who owns the home, and who ordinarily lives in it.

The two ways a home qualifies

Under the Income Tax Act's home accessibility provision, a home in Canada qualifies in one of two ways. It is owned, alone or jointly, by the qualifying individual, who ordinarily lives there or is reasonably expected to during the year. Or it is owned by the eligible individual and ordinarily lived in by both that person and the qualifying individual, and the qualifying individual does not own and ordinarily live in another home in Canada throughout the year.

Ownership is the fixed point. A rented home fails. So does a home owned by a relative who is not an eligible individual, and a child's house where a parent visits but does not ordinarily live. A share in a housing co-operative counts as ownership. A qualifying individual can have only one eligible dwelling at a time, although a mid-year move can produce two in one year, still under a single $20,000 total.

What to do instead

Before anyone signs a contract, answer three questions on paper. Whose name is on title? Who ordinarily lives there this year? Does the qualifying individual also own and live in another home? If the plan is for a parent to move in with you, the renovation to your home depends on the second route, and that route closes if the parent keeps and lives in their own house for the whole year. When ownership runs through a trust or the living arrangement is split, treat it as a question for a tax professional.

The ceiling is shared. Families who do not coordinate find that out from the CRA.

One ceiling, several possible claimants

The $20,000 applies per qualifying individual across that person and every eligible individual claiming for them. Where one home has more than one qualifying individual, such as spouses who are both over 65, the $20,000 applies to the dwelling. Two qualifying people in one house do not double it. The claim can be split in any proportion, but the pieces must add up to no more than the ceiling. If the claimants cannot agree, the law lets the CRA fix the portions.

Who paid also matters. In a technical interpretation on the credit, the CRA took the position that the expense must be made or incurred by the qualifying individual or an eligible individual. Either of the two may then claim it. If someone outside both roles pays the contractor, neither can. Technical interpretations are general comments, not rulings on your facts, so read this as a signal of how the agency thinks.

What to do instead

Write a one-page allocation before the first return is filed. List each invoice, who paid it, and the amount each person will claim. Total the column. It should not exceed $20,000 for the year, or the actual eligible expenses if those are lower. Give every claimant a copy.

Then decide the split on tax owed, not on fairness. The credit is non-refundable, so a claimant with no federal tax payable wastes their share. The sibling or spouse who can use the full credit is usually the better claimant, provided they meet the eligible individual test and the payment records line up.

This is the newest trap and the one most likely to catch careful people, because the old advice was correct until recently.

The rule reversed on January 1, 2026

For 2025 and earlier tax years, an expense that qualified for both the medical expense tax credit and the HATC could be claimed under both. That permission is gone. The current text of the home accessibility section of the Income Tax Act excludes any expense included in a medical expense claim by any taxpayer for any year, and shows the subsection that allowed the double claim as repealed, in force from January 1, 2026.

There is a wrinkle. As of early October 2026, the CRA's own line 31285 page is still written for the 2025 tax year and still describes the double claim. That is accurate for a 2025 return. It is not the rule for a 2026 project.

What to do instead

For 2026 and later, pick one credit for each expense. Run both calculations before choosing, because they work differently: the medical credit has an income-based threshold and no $20,000 ceiling, while the HATC has no threshold and a hard ceiling. Splitting a project by invoice between the two credits can make sense. Claiming one invoice twice no longer does. Note the word "any" in the exclusion. If your spouse claims the ramp as a medical expense, you cannot claim it as a home accessibility expense.

Government help is treated differently from other reimbursement. Federal and provincial grants, forgivable loans, and tax credits do not reduce the HATC. An amount reimbursed from another source, such as an insurer, does.

Because grants and credits interact differently in each program, our explainer on which Ontario renovation rebates combine and which cancel out is a useful companion for the non-tax side.

You do not send receipts with the return. You keep them, and the standard they have to meet is set out in advance.

What the records must show

The CRA's list is concrete. Documents must identify the vendor or contractor, their business address, and their GST/HST number if they have one. They must describe the goods and when they were bought, give the date of delivery or the date the work was performed, describe the work and the address where it was done, show the invoice amount, and prove payment in full. An invoice that reads "bathroom reno, $18,500" with no address, no dates, and no breakdown fails most of that list.

Condominium and co-operative owners have their own version. A share of common-area accessibility work can qualify, but it needs a statement from the corporation, signed by an authorized person, setting out the amounts, your share, the vendor, the work, and the dates. A special-assessment notice alone rarely does that.

What to do instead

Build the file while the project is live. For each invoice, attach the proof of payment: a cancelled cheque, a card slip, or a bank statement line. Keep delivery slips. Write change orders down, because a change order is where an accessible shower quietly becomes a luxury one. Then keep the file. The agency's guidance on how long to keep tax records says at least six years, and it specifically mentions cancelled cheques and bank statements alongside receipts.

How you fix a claim depends on one fact: where the return is in the CRA's process.

Three statuses, three routes

If the return is not yet filed, fix the claim before it goes in. Nothing else is needed.

If the return is filed but not yet assessed, wait. The CRA's page on changing a tax return is explicit that you must have your notice of assessment before requesting a change. Filing a second return is not the mechanism.

If the return is assessed, request an adjustment. There are three channels: Change my return in your CRA account, ReFILE through tax software, or Form T1-ADJ by mail. Online requests are generally processed in about two weeks; mailed requests take about 19 weeks. Change my return reaches back ten calendar years, which in 2026 means the 2016 return and later. That is the full life of this credit.

What to do instead

Use the online route where you can, and put every change into a single request. The agency asks filers to wait for a response before sending another. For online requests, you provide documents only if the CRA contacts you. For a mailed T1-ADJ, include the supporting documents with the form. Either way, the request can itself be reviewed before a reassessment is issued, so assemble the file from the records section before you submit, not after.

Adjustments run in both directions. If the mistake you found is an over-claim, such as a double-counted invoice or an ineligible relative's labour, the same route corrects it. Fixing it yourself is simpler than explaining it later.