Ontario Annual Rent Increase Rules — A Step-by-Step Guide for Landlords

What Ontario Law Actually Requires

The Residential Tenancies Act (RTA) gives Ontario landlords the right to raise rent once every 12 months — but only if you follow every step in the correct order. Miss one requirement and the entire increase is void. You cannot fix a defective notice with an email or a text message; you have to start over, and that delay can cost you a full year of lost revenue.

Here is the complete sequence, stripped down to what you actually need to do.

Step 1: Confirm Your Unit Is Rent-Controlled

Most Ontario rental units occupied on or before November 15, 2018 are subject to the annual guideline cap. The Ministry of Municipal Affairs and Housing publishes the guideline each June — it is 2.1% for 2026 and 1.9% for 2027, both below the statutory ceiling of 2.5%.

Some units are exempt from the percentage cap under RTA s. 6.1. For a unit in a purpose-built rental building or condominium, no part of the building may have been occupied for residential purposes on or before November 15, 2018; secondary suites have a separate test. If your unit is exempt, use Form N2 instead of Form N1, and you can set the increase amount yourself. The 12-month frequency rule and the 90-day notice requirement still apply to exempt units.

Not sure which category your unit falls into? For a purpose-built rental building or condominium, the test is whether any part of the building was first occupied for residential purposes on or before November 15, 2018; secondary suites are assessed under the separate test in s. 6.1(3). Building permits and municipal occupancy certificates are useful evidence if a tenant challenges your classification at the Landlord and Tenant Board.

Step 2: Check the 12-Month Clock

Under RTA s. 119, you cannot increase the rent until at least 12 full calendar months have passed since either the tenancy start date or the effective date of the last lawful increase — whichever is later. The clock runs from the effective date on the last N1 or N2 you served, not from the date you mailed or signed it.

If you skipped a year (or several years), you cannot bank the missed percentages and apply them all at once. Each year's guideline applies only to increases taking effect during that calendar year, calculated against the current lawful rent. A skipped year is permanently lost.

Step 3: Calculate the New Rent

Multiply the current lawful monthly rent by the guideline percentage for the year in which the increase takes effect — not the year you serve the notice. For a $2,000/month unit with an increase effective January 1, 2027:

$2,000 × 1.9% = $38 increase → new rent of $2,038/month.

Round to the nearest cent. The percentage applies to lawful rent. Charges for services such as parking or storage may be part of rent if provided under the original tenancy agreement, unless severed by a formal agreement under RTA s. 123; separate utility agreements are not automatically compounded into the rent calculation.

Step 4: Complete the Correct Form and Calculate Your Notice Deadline

For a rent-controlled unit, download the current version of Form N1 from the Tribunals Ontario website; for an exempt unit, use Form N2. Fill in the tenant's name, the rental unit address, the current lawful rent, the new rent, and the effective date. Double-check the math — an arithmetic error voids the notice.

The effective date must fall on the first day of a rental period (usually the 1st of the month) or the day a fixed-term tenancy expires. You must give the tenant at least 90 days of notice before that effective date.

For a January 1, 2027 effective date, the tenant must receive (or be deemed to receive) the notice by October 3, 2026 at the latest.

Step 5: Serve the Notice Properly

Ontario law allows five methods of service, each with its own deemed-receipt timeline:

• Hand delivery to an adult occupant — deemed received the same day
• Mailbox or door slot — deemed received the same day
• Regular mail — deemed received 5 calendar days after mailing
• Courier — deemed received 1 business day after sending
• Email — deemed received the same day, but only if the tenant signed a written consent to electronic service (Section 15 of the Ontario Standard Lease)

Taping a notice to the tenant's door is prohibited. Text messages and landlord portal posts do not count as statutory service. Either method voids the notice entirely.

If you mail the notice, you must post it early enough that the 5-day deeming period plus the 90-day notice period both fit before the effective date. For a January 1, 2027 increase, that means mailing by September 28, 2026.

Step 6: Document Everything

Complete a Certificate of Service (Form P1) immediately after serving the notice. Record the date, time, method, and address. Attach any supporting evidence — a Canada Post receipt for mailed notices, the email and consent form for electronic delivery.

This documentation is your defence if the tenant later challenges the increase at the LTB. Without it, the Board has only the tenant's testimony to weigh against yours.

Step 7: Reconcile the Last Month's Rent Deposit

Under RTA s. 106, you owe the tenant annual interest on their last month's rent (LMR) deposit at a rate equal to that year's guideline. You can apply that interest directly to top up the deposit to match the new rent. When the increase equals the guideline, the interest owed and the top-up required cancel out to zero — no cash changes hands. Record the calculation in your tenancy ledger regardless.

Common Mistakes That Void the Entire Increase

• Using the wrong form (N1 on an exempt unit, N2 on a controlled unit)
• Setting the effective date before 12 months have elapsed from the last increase
• Failing to give 90 days of notice (often caused by forgetting the 5-day mail deeming period)
• Serving the notice by text, portal message, or door posting
• Applying the wrong year's guideline (the rate follows the effective date, not the service date)
• Math errors in the rent calculation on the form itself

Any of these makes the notice void from the start. You cannot patch a defective notice with a correction letter — you must issue a fresh notice and restart the 90-day clock.

What If the Tenant Challenges?

A tenant who believes your increase is unlawful can file Form T1 with the LTB within 12 months of the date the allegedly unlawful amount was first charged or collected. If they succeed, you refund the overpayment. If they pay the increased amount for 12 consecutive months without filing, the new rent becomes lawful by operation of RTA ss. 135.1 and 136 — but that is not a compliance strategy you want to rely on.

The Ontario Rent Increase Guide walks through every step above with worked calendar examples, a field-by-field N1 walkthrough, deemed-service worksheets, and a printable compliance checklist. It covers the full process from frequency check to proof-of-service filing — everything a self-managing landlord needs to get the increase right the first time.

See more Ontario guides →