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Guide · Deadlines
N1 deadline calendar for 2027
Miss the 90-day window and the increase has to move to a later date.
General information, not legal advice. Use the official Landlord and Tenant Board (LTB) forms and the Residential Tenancies Act as the authority. Results are estimates; check the official sources below.
How the deadline works
- The notice must be served at least 90 days before the increase takes effect.
- A notice sent by mail counts as served on the fifth day after mailing, so mail it at least 95 days ahead.
- The 12-month rule still applies: the increase cannot be earlier than 12 months after the last one.
Serve-by dates for increases on the 1st of each month in 2027
| Increase takes effect | Serve by | Mail by |
|---|---|---|
| 2027-01-01 | 2026-10-03 | 2026-09-28 |
| 2027-02-01 | 2026-11-03 | 2026-10-29 |
| 2027-03-01 | 2026-12-01 | 2026-11-26 |
| 2027-04-01 | 2027-01-01 | 2026-12-27 |
| 2027-05-01 | 2027-01-31 | 2027-01-26 |
| 2027-06-01 | 2027-03-03 | 2027-02-26 |
| 2027-07-01 | 2027-04-02 | 2027-03-28 |
| 2027-08-01 | 2027-05-03 | 2027-04-28 |
| 2027-09-01 | 2027-06-03 | 2027-05-29 |
| 2027-10-01 | 2027-07-03 | 2027-06-28 |
| 2027-11-01 | 2027-08-03 | 2027-07-29 |
| 2027-12-01 | 2027-09-02 | 2027-08-28 |
Dates computed with the same rules as the calculator. For other dates, use the calculator.
Ways to serve the notice (LTB instructions)
- Hand it to the tenant or an adult in the unit.
- Leave it in the mailbox or where mail is normally delivered.
- Slide it under the door or through a mail slot.
- Send it by courier, or by mail (served 5 days after mailing).
- Do not just post it on the tenant's door.
Open the rent increase calculator
Official sources
- ontario.ca — Residential rent increases
- LTB — How to serve a landlord or tenant with documents
- LTB — Rules of Procedure (rule 3.9: service by mail)
Rules last checked against these sources on 2026-10-29.