A King West Closing, Then a Flight to Dubai
The owner is a software engineer. He closed on a one-bedroom on King West in 2018, lived in the unit for almost four years, then accepted a senior role in Dubai in 2022. He kept the condo, leased it to a young couple working in finance, and asked a cousin in Etobicoke to deposit the rent cheques into a Canadian account once a month. The rent was $2,400. He thought of it as a side-account that would pay down the mortgage while he was abroad.
The first letter from Canada Revenue Agency arrived the following March. It asked for an NR4 slip he had never heard of and referenced something called Part XIII. He read it three times on a Friday night in a Dubai apartment, then opened a browser and typed "NR4 Canada rental." He spent the rest of the weekend not sleeping.
His story is a composite of several real ones. The mechanics are the same every time.
Why Canada Withholds 25 Percent of Your Rent
When a Canadian tax resident moves abroad and continues to earn Canadian rental income, the Income Tax Act treats that income differently from the moment the residency status changes. Part XIII of the Act applies a flat 25 percent withholding tax to gross rents paid to a non-resident landlord, and the Canada Revenue Agency expects that tax to be remitted by the 15th day of the month following each rent payment, per the agency's Part XIII rules. The withholding sits at the front of the cash flow, not at the back. The owner does not pay it at filing time. The agent does, every month.
The agent is whoever the non-resident has authorized to collect the rent on their behalf. A property manager is the cleanest version. A friend or family member who deposits cheques is also an agent under the Act, whether they call themselves one or not. So is a lawyer or accountant who handles the receipts. The remittance obligation does not depend on the title. It depends on who touches the money.
This is the rule that catches most newly non-resident owners off guard. They keep collecting rent the way they did when they lived in Toronto, and a year later they discover that the cousin in Etobicoke was, on paper, supposed to be wiring a quarter of every cheque to Ottawa.
The NR4: A Mirror of the T4
The NR4 slip is the annual record of what was paid and what was withheld. The agent files it with CRA and gives a copy to the non-resident owner by March 31 each year. It reports gross rent paid for the calendar year and the tax withheld at 25 percent.
If you are used to looking at a T4 from an employer, an NR4 reads similarly. There is a gross income box, a withholding box, an income-code box that identifies rent, and a country-code box for the recipient's tax residence. There is no net-income calculation on the slip. The slip reports money in and tax out. That is the whole document.
Two practical things follow. The NR4 is generated by the agent, not by the owner, so the owner's job is to make sure the agent has the right tax-residence information and mailing address on file. The figure on the slip is gross by default. If the owner did not file paperwork to elect otherwise, the entire 25 percent came out of the top of every rent cheque for twelve months.
The NR6 Election: Withholding on Net Rent Instead of Gross
The election that changes the math is Form NR6. It is filed jointly by the non-resident owner and the Canadian agent, and the deadline is January 1 of the tax year, or before the first rent payment of the year, whichever comes first. The form is a one-page undertaking. The owner promises to file a Canadian income tax return for the year. The agent promises to keep records and remit on the corrected basis. Once CRA approves the election, the agent is permitted to withhold 25 percent on the estimated net rental income, meaning rent minus deductible expenses such as property management fees, mortgage interest, property taxes, insurance, and repairs, rather than on the gross rent.
A condo investor renting a one-bedroom in downtown Toronto for $2,400 a month and paying roughly $1,200 in deductible monthly expenses sees the per-month remittance fall from $600 on gross to $300 on net. Over a year that is $3,600 in working capital that stays in the owner's account instead of cycling through CRA and waiting to come back at filing time. The owner still owes the same final tax. The election simply matches the withholding to the real economics, which is why guidance from Buttonwood Property Management's NR4/NR6 practice for non-resident owners treats the election as a default step rather than an optional one.
The mechanics are spelled out on the CRA page for Form NR6. The form must be approved in writing before the agent can switch to net withholding. Until it is approved, the agent is still on the hook for 25 percent of gross.
The Agent of Record: Whose Liability Is It
The Income Tax Act puts the remittance obligation on the agent personally. If the cousin in Etobicoke fails to remit, CRA can assess that cousin for the unpaid 25 percent, plus interest and penalties, regardless of whether the non-resident owner reimburses them. Recent Tax Court rulings have confirmed that tenants and informal agents can be assessed under the same provision when a property manager is not in place. The liability does not stay overseas with the owner. It lands on the person standing in the rent path inside Canada.
That is why the choice of who collects the rent is the upstream decision, not the downstream one. A property manager with a Non-Resident Withholding Tax (NRF/NR) account, an NR6 election on file, and a routine for remitting on the 15th of the month removes the cousin from the equation entirely. The agent becomes a regulated entity that does this for hundreds of doors, not a relative doing a favour.
The further upstream choice, before any of that, is who lives in the unit. Tenant placement determines whether the rent cheque clears, whether the file ever ends up in front of an adjudicator, and whether the year's NR4 slip is a clean piece of paper or a problem. The screening methodology Buttonwood has built since 2011 runs on procedures refined across thousands of GTA tenancies, with a persistently low eviction rate that landlords cite when they refer other landlords into the practice, and it is not a number the rest of the residential property management field reports near. The slip is downstream of the screening.
What the Toronto Numbers Look Like
TRREB's Q1 2025 rental data put the average one-bedroom condominium apartment rent in the GTA at $2,343 a month. Annualized, that is roughly $28,100 in gross rent on a single unit.
Run the King West owner's file through both scenarios. Without an NR6 election, the agent remits 25 percent of every gross cheque, or about $585 a month, $7,030 a year. The owner gets the cash flow difference at filing time, eventually, after expenses are reconciled on a Section 216 return. With an NR6 election approved by January 1, and a defensible estimate of $1,200 in monthly deductible expenses, the agent withholds 25 percent of about $1,143 a month, or roughly $286. The annual remittance lands near $3,430. The cash flow gap between the two scenarios on a single one-bedroom is around $3,600 a year. Multiply that by a small portfolio and the working-capital effect becomes the difference between funding a renovation in March and waiting on a refund cheque in September.
The March Letter, One Year Later
The King West owner spent that weekend in Dubai building a different routine. He hired a Toronto property manager in November, signed an NR6 with the agent in late December, and CRA approved the election in early January. The agent has remitted on net every month since. The Section 216 return was filed in June and reconciled cleanly. The new NR4 slip arrived on time and showed the corrected withholding.
The cost of the year he didn't know was about $3,500 in cash flow held by CRA until the refund landed, plus a weekend in March he will not get back. His cousin has gone back to depositing nothing more complicated than birthday cheques.
