Tuesday, 8:40 AM. You are reconciling the rent roll when unit 204 stops you: the increase you served last fall took effect in June, not March. Nobody changed it. Nothing in the file explains it.
British Columbia explains it. Most process failures announce themselves: a form comes back, a filing is refused, someone objects. BC's tenancy rules are built to fail silently instead. Serve a rent increase notice late and no one writes back and nothing bounces; the law simply moves the effective date to the earliest one that works and keeps the old rent running in the meantime. Collect more than the year's limit allows and there is no confrontation either; the tenant is entitled to deduct the difference from future rent. The statute corrects your paperwork for you, and it always corrects in the tenant's direction.
That is why the cost never looks like a mistake. Rent still arrives. The books still balance. The only trace is a number that should have moved and did not, for three months, times however many leases hit the same snag that year. Nobody audits for the absence of a change, so the quietest line item in the portfolio is the increase that slid.
The arithmetic that produces the slide is simple in isolation and unforgiving in bulk. Notice runs in whole months, and a month only counts if it begins after the notice arrives. Mail spends five days of your margin before the clock even starts. The frequency rule measures effective date to effective date, so every lease carries its own anniversary. And the annual limit belongs to the calendar year the increase lands in, published only months before that year begins, which squeezes every January effective date into a short fall window. Forty leases means forty backward counts, and the habits that survive are coping strategies: a spreadsheet of anniversaries, a calendar of serve-by dates, a November ritual of counting months on your fingers. They work until the person who keeps them is away in the wrong quarter.
British Columbia never says no to a late notice. It moves your effective date and keeps the old rent running.
Handled differently, the backward count stops being a human skill. Every lease carries its own earliest lawful date, computed from its own history. Every scheduled increase carries a serve-by date with the whole months and the mailing days already subtracted. The fall announcement becomes a prompt to answer instead of a news item to catch. The March increase takes effect in March, and the person who used to count months spends November on the decision that was always theirs: the number.
Scaalr runs a British Columbia rent increase as a scheduled event on the lease: the worklist shows every eligible lease and its earliest lawful date, the official RTB-7 is filled and signed before anything serves, service is recorded as it happens, and no notice serves in a market until a manager has reviewed and acknowledged its current rules. The rules behind the arithmetic, the annual limit, the whole-month count, and the two clocks, are in BC Rent Increases: The Annual Limit, Form RTB-7, and the Twelve-Month Clock.
For the full British Columbia breakdown, with every rule tied to its official source, see: BC Rent Increases: The Annual Limit, Form RTB-7, and the Twelve-Month Clock.