A unit sits empty for three weeks and the instinct is to drop the price. Take $100 off, get someone in, stop the bleeding. It works, and that is the problem: it works so reliably that most small landlords never compare it to the alternative. A rent-free month fills the unit too, and in year two it stops costing you anything.
The difference is not about the discount. It is about which number ends up on the lease.
The myth: a lower asking rent is the cheapest way to end a vacancy
The logic sounds airtight. Every empty month costs a full month of rent, so a small permanent cut is cheaper than a long vacancy. That part is true. Where it falls apart is the word permanent, which most people gloss over when they are staring at an empty unit.
In Ontario, the rent you first charge a new tenant is the lawful rent for that tenancy. That is section 113 of the Residential Tenancies Act, 2006. Every guideline increase after that is a percentage of the number you signed. Cut the face rent and you have not given away one discount, you have moved the starting point of a compounding series downward for as long as that tenant stays.
The reality: run it over three years, not one
Take a unit asking $2,000 a month. Compare a $100 cut against keeping the $2,000 face rent and giving one month free on a 12-month lease. Ontario's guideline is 2.1% for 2026 and 1.9% for 2027, both published on the province's rent increase guideline page.
- Year one: the cut collects $22,800. The free month collects $22,000. The cut is ahead by $800.
- Year two: the cut rises to $1,939.90 a month, the incentive unit to $2,042. That is $1,225 more over the year.
- Year three: the gap widens to roughly $1,248.
The incentive is behind after the first year and ahead by about $425 by the end of year two. By the end of year three it has gained roughly $1,674 on a single unit. Nothing about the tenant's experience changed. They got a month of free housing instead of a smaller cheque every month, and most renters prefer the free month because it lands at move-in when they are paying for movers and a deposit.
Two honest caveats. The free month costs more cash in year one, so if your problem is this month's mortgage payment and not next year's rent roll, the cut wins. And if the tenant leaves after 12 months, the two options are close to a wash, with the cut slightly ahead. The incentive pays off on tenants who stay, which is most of them.
Where the incentive route goes wrong
The protection is not automatic. Ontario treats certain discounts as not affecting lawful rent, but only if they meet the prescribed conditions in section 111 of the Act and sections 10 and 11 of O. Reg. 516/06. The rules are specific about size and timing. Rent-free periods can total up to three months of rent in a 12-month period. A prescribed discount can qualify if the total given in the first eight months does not exceed one month of rent, with a second pattern allowing up to two months under tighter spacing rules.
Every route has one requirement in common: the discount has to be in a written agreement. A handshake deal, an email, or a free month that never made it into the tenancy agreement does not get the protection. When a discount falls outside the prescribed conditions, lawful rent is calculated on the average rent charged. You meant to give a one-time incentive and you gave a permanent reduction instead, which is exactly the outcome you were trying to avoid.
So write the undiscounted rent and the discount into the lease as separate, explicit numbers. Read the regulation before you design the offer, not after you sign it.
Two things to check before you assume any of this applies to you. Units first occupied for residential purposes after November 15, 2018 are exempt from Ontario's rent control, so the guideline math above does not bind them. The anchoring still matters, because you negotiate up from whatever you signed, but the compounding is yours to set. And if you rent outside Ontario, the discount rules are different everywhere. Check your provincial tenancy board before copying any of these structures.
When cutting the rent is the right call
Sometimes it is, and an incentive on a mispriced unit is a costume. Use the inquiry volume to tell the two situations apart.
If you are getting steady inquiries but no applications, your price is close to market and the friction is somewhere else: the photos, the availability date, the parking, how long you take to reply, or a screening bar that is quietly rejecting everyone. An incentive fixes a hesitation problem. It gives a renter who already likes the unit a reason to commit this week.
If you are getting almost no inquiries at all, you are priced above the market and no incentive will paper over it. Renters filter by price before they ever see your offer, so a free month advertised at the wrong number never gets seen. Cut the asking rent, take the lower base, and treat it as the cost of having misread the market.
What to do with the unit you are sitting on
- Pull the last three weeks of inquiry counts. No inquiries means a pricing problem. Inquiries without applications means a conversion problem.
- If it is a conversion problem, model both options over three years on your actual rent and your province's guideline. Do it on paper. The comparison is rarely as close as it feels.
- Decide what you can carry. The incentive costs more cash in year one. If that is a real constraint, say so and take the cut deliberately rather than by default.
- If you go with an incentive, put the undiscounted rent and the discount in the written tenancy agreement, structured to fit the prescribed conditions.
- Write down which lever you pulled and why. In eight months, when you are comparing units, you will want to know which ones carry a suppressed base rent.
The vacancy is the loud problem, so it gets the fast decision. The rent roll is the quiet one, and it keeps the score for years.