N1 Notice Ontario: Understanding the Standard Rent Increase Form

If you’ve rented the same place for a year or more in Ontario, chances are you’ve seen this one already: a letter arrives, your landlord’s signature is at the bottom, and the number next to “new rent” is a little higher than before. That letter is almost always the N1 Notice — officially the “Notice of Rent Increase.” It’s the most common LTB form in circulation, and also one of the most frequently filled out incorrectly.

Here’s a full breakdown of what the N1 covers, what the current guideline allows, and the specific mistakes that can make an otherwise ordinary rent increase completely unenforceable.

What Is an N1 Notice?

The N1 is the standard form Ontario landlords must use to raise rent on most rent-controlled units — apartments, houses, condos, and basement units first occupied on or before November 15, 2018. It’s the default path for a routine annual increase that stays within the province’s rent increase guideline.

The guideline itself changes every year, set using the Ontario Consumer Price Index. For 2026, it’s 2.1% — the lowest cap in several years. For 2027, it’s set to drop further to 1.9%. If a landlord wants to increase rent beyond that percentage, the N1 alone won’t cut it; that requires either a negotiated N10 agreement or a formal Above Guideline Increase application to the LTB.

The Three Rules Every N1 Has to Follow

1. 90 days’ written notice. The tenant must receive the N1 at least 90 days before the new rent takes effect. If it’s mailed, add extra days for delivery — the clock starts when the tenant actually receives it, not when it’s postmarked.
2. Once every 12 months. Rent can only go up once in any 12-month window, measured from the tenant’s move-in date or their last increase — whichever is more recent.
3. Within the guideline. For a standard N1, the increase can’t exceed the current year’s guideline percentage, calculated on the tenant’s lawful rent — not a discounted or promotional rate.

Common Mistakes That Void an N1

• Using last year’s guideline percentage instead of the current one
• Calculating the increase from a discounted move-in rate rather than the actual lawful rent
• Setting an effective date that isn’t the start of a rental period (for monthly tenancies, that’s the first of the month)
• Serving the notice verbally, by text, or by email without the tenant’s prior written consent to receive notices that way
• Tenant names on the form not matching the lease exactly
• Increasing rent again before the 12-month window has actually closed

A single error on any of these points is often enough for a tenant to successfully dispute the increase at the LTB — and in some cases, landlords have had to refund months of an increase collected under an invalid notice. If you’re unsure whether an N1 was served correctly, our Landlord & Tenant Board services team can review it before it becomes a bigger dispute.

N1 vs. N2 vs. N10: Which Form Applies?

If you’re not sure which category your unit falls into, our guide to the N10 Notice covers the negotiated-agreement path in more depth, including what tenants can and can’t be asked to sign.

What Tenants Can Do If an N1 Looks Wrong

Receiving an N1 doesn’t obligate a tenant to simply accept the number on the page. A few practical checks worth running:

• Confirm the percentage matches the current year’s official guideline
• Count backward from the effective date to make sure a full 90 days’ notice was actually given
• Check the date of your last increase — has a full 12 months passed?
• Compare the new rent to your actual current rent, not a discounted rate that no longer applies

If something doesn’t add up, a tenant can raise the issue directly with the landlord or bring it forward at the LTB. Our team assists tenants across Ontario with exactly this kind of review.

Frequently Asked Questions

Can a landlord increase rent by more than the guideline using an N1?

No. The N1 only covers increases within the current guideline. Anything above that requires a negotiated N10 agreement or a formal Above Guideline Increase application to the LTB.

What happens if my landlord gives me less than 90 days’ notice?

The notice is invalid. The landlord would need to serve a new N1 with a corrected effective date that provides the full 90 days.

Do I have to sign the N1 for it to take effect?

No. Unlike an N10, the N1 doesn’t require tenant agreement or a signature — as long as it follows the rules, it takes effect on its own.

How do I know what this year’s guideline is?

Ontario publishes the guideline annually on its website. For 2026, it’s 2.1%; for 2027, it’s set at 1.9%.

Have Your N1 Reviewed Before It Causes a Dispute

A rent increase notice looks simple on paper, but the timing and math behind it are exactly where disputes tend to start. Whether you’re a landlord who wants a clean, enforceable N1, or a tenant checking whether an increase was calculated correctly, a second set of eyes on the paperwork can save months of back-and-forth at the Board.

Ahmed Legal Services Professional Corporation assists landlords and tenants with rent increase notices and LTB disputes across Richmond Hill, Markham, Toronto, Mississauga, Brampton, Vaughan, and the wider GTA. Contact our office today to schedule a consultation.