You found a tenant.

The application was approved, the lease was signed, and the rent deposit was paid.

The tenant is supposed to move in on September 1.

Everything seems settled.

Then, a few days before move-in, you receive a message:

“Sorry, my plans changed. I’m not moving in anymore. Can you send my deposit back?”

For an Ontario landlord, the first reaction might be:

“You signed a one-year lease and backed out. I’m keeping the deposit.”

But the situation may not be that simple.

A rent deposit is not automatically a penalty that a landlord can simply keep whenever a tenant changes their mind.

At the same time, signing a lease and then deciding not to move in does not necessarily mean the tenant can simply walk away without consequences.

So what should the landlord actually do?

The key is to focus on three things:

Re-rent the property quickly, document everything, and determine the actual loss.

First: Does Signing the Lease Actually Matter?

Yes.

A signed lease is not simply a reservation that a tenant can casually cancel because their plans changed.

Ontario’s Residential Tenancies Act defines a tenancy agreement broadly as an agreement under which a tenant is given the right to occupy a rental unit in exchange for rent.

The Landlord and Tenant Board also explains that a tenancy generally begins on the date the tenant is entitled to occupy the rental unit, even if the tenant does not physically move in on that date.

So if a tenant signs a lease starting September 1 and then decides on August 25 that they no longer want the property, simply saying:

“I haven’t moved in yet, so the lease doesn’t count.”

is not necessarily the right way to look at the situation.

But there is another important issue.

Can the Landlord Automatically Keep the Deposit?

This is where landlords need to be careful.

In Ontario, a landlord can generally collect a rent deposit, commonly referred to as a last month’s rent deposit.

The Residential Tenancies Act specifically regulates what that deposit is for.

It should not simply be treated as:

“Cancellation fee: tenant backs out = landlord automatically keeps everything.”

Instead, what actually happens to the deposit can depend on the circumstances, including what losses the landlord has suffered and what steps are taken afterward.

That’s why a landlord shouldn’t stop at:

“Good. I already have their deposit.”

There is still work to do.

Example: Tenant Cancels One Week Before Move-In

Let’s use a simple example.

The lease says:

Monthly rent: $2,800
Move-in date: September 1
Deposit paid: $2,800

On August 24, the tenant tells the landlord:

“I got transferred to another city. I won’t be moving in.”

The landlord immediately relists the property.

Showings begin the next day.

A replacement tenant is found and starts:

September 5.

Now compare that with another situation.

The original tenant cancels on August 24.

But the landlord does nothing for three weeks.

No advertisement.

No showings.

No effort to find another tenant.

Then the landlord says:

“The unit was empty for September, so I’m keeping your entire $2,800.”

Those two situations are very different.

The Landlord Should Try to Reduce the Loss

One of the most important concepts here is mitigation.

Ontario’s Residential Tenancies Act says that when one party breaches a tenancy agreement, the person claiming compensation has a duty to take reasonable steps to minimize their losses.

In plain English:

The landlord generally shouldn’t intentionally leave the property empty and let the bill grow.

If the tenant says they’re not coming, the landlord should start taking reasonable steps to find another tenant.

That might mean:

• Re-listing the property
• Contacting previous interested applicants
• Scheduling new showings
• Responding to inquiries
• Reviewing applications
• Keeping records of those efforts

The goal isn’t:

“How much can I charge the original tenant?”

The goal should be:

“How quickly can I get this property rented again?”

Why Documentation Matters

Imagine the dispute later becomes:

Tenant:
“I told the landlord three weeks before move-in. They could have rented it easily.”

Landlord:
“I tried, but nobody qualified.”

Who is right?

That’s where records become extremely useful.

Landlords should consider keeping:

Communication

Save the tenant’s message stating that they will not be moving in.

Dates

Record exactly when the tenant informed you and when the original tenancy was supposed to begin.

New listing

Keep evidence showing when the property was advertised again.

Showings

Keep a simple record of inquiries and showings.

Applications

Document when replacement applications were received and processed.

Financial records

Keep records of any actual rent loss or other relevant costs.

If a dispute eventually occurs, documentation is much stronger than:

“I remember trying really hard to rent it.”

What If You Find Another Tenant Before the Original Move-In Date?

Now imagine the original tenant cancels on August 15.

The lease was supposed to start September 1.

But you immediately advertise the property and find another qualified tenant who can also move in:

September 1.

That changes the financial picture significantly.

If there is no period where the property actually sits vacant because of the original tenant’s decision, the landlord should not simply assume that the entire deposit automatically becomes a windfall.

The actual facts and losses matter.

What If the New Tenant Moves In a Few Days Later?

Let’s go back to our earlier example.

Original tenancy:

September 1 — $2,800/month

Replacement tenant:

September 5 — $2,800/month

The property was vacant for only a few days.

That’s very different from the property sitting empty for an entire month.

Again, the important question becomes:

What actual loss resulted from the original tenant backing out?

Rather than automatically assuming:

Deposit = landlord’s money.

What If It Takes a Month to Find Another Tenant?

Now imagine the landlord does everything reasonably possible.

The property is immediately advertised.

There are multiple showings.

Several applicants are screened.

But no suitable replacement tenant is found until October 1.

Now the landlord may have suffered a much larger actual rental loss.

The circumstances are very different from finding a replacement on September 5.

This is why there isn’t always a simple answer such as:

“Tenant cancelled, therefore deposit is always returned.”

or:

“Tenant cancelled, therefore landlord always keeps the deposit.”

The actual circumstances matter.

What If the Replacement Tenant Pays Less Rent?

Here’s another realistic GTA scenario.

Original lease:

$3,000/month

Tenant backs out before moving in.

The landlord immediately puts the property back on the market.

But market conditions have changed, and after reasonable efforts, the best qualified replacement tenant is willing to pay:

$2,850/month.

Now there may be a difference between the original agreement and what the landlord is able to obtain from the replacement tenant.

Again, this becomes a question of actual loss, reasonable mitigation efforts and the specific circumstances, rather than simply assuming the deposit automatically resolves everything.

If a significant amount is involved, landlords should obtain appropriate legal advice about what can actually be claimed.

What If the Tenant Says “Just Keep My Deposit”?

Sometimes the tenant will say:

“I know I’m cancelling. Just keep the deposit and we’ll call it even.”

That may sound convenient.

But landlords should still document what both parties are agreeing to.

If the intention is to mutually end the arrangement and settle any outstanding issues, don’t rely only on a casual phone conversation.

Make sure the agreement is properly documented.

That helps prevent a future situation where one person says:

“We agreed the deposit settled everything.”

while the other says:

“No, I never agreed to that.”

What If Only the Deposit Was Paid, but the Lease Was Never Signed?

This is a different situation.

Suppose a prospective tenant sends money but the lease is never actually finalized.

Then they change their mind.

Don’t automatically treat that situation exactly the same as:

A completed and signed one-year lease + deposit + confirmed commencement date.

The documents, communications, payment purpose and whether an agreement was actually formed can all become important.

If there’s uncertainty about whether a binding tenancy agreement exists, landlords should get appropriate advice before simply keeping the money.

What If the Landlord Is the One Who Cancels?

This is extremely important.

Let’s reverse the situation.

The tenant:

✔️ Signed the lease
✔️ Paid the deposit
✔️ Booked movers
✔️ Gave notice at their old home
✔️ Is ready to move in September 1

Then the landlord suddenly says:

“Sorry, I’ve changed my mind. I’m not renting the property anymore.”

That’s a completely different situation.

Ontario’s Residential Tenancies Act specifically addresses situations where a landlord collects a rent deposit but does not give the tenant vacant possession of the rental unit.

So landlords should never assume:

“They haven’t physically moved in yet, so I can cancel too.”

A tenant deciding not to move in and a landlord refusing to provide the agreed rental property are not the same scenario.

What Should the Landlord Do When the Tenant Backs Out?

If you receive that dreaded message before move-in, don’t immediately start arguing about the deposit.

A more practical approach is:

1. Get the cancellation in writing

If the tenant calls you, follow up in writing and keep a record of what was communicated.

2. Review the lease and dates

Confirm the agreed rent, commencement date, deposit and relevant terms.

3. Respond professionally

Avoid immediately saying:

“Your deposit is gone.”

You may not yet know what your actual loss will be.

4. Re-list the property promptly

Don’t wait unnecessarily.

Start trying to find a replacement tenant.

5. Keep evidence

Save advertisements, inquiries, showing records, applications and communication.

6. Keep track of the actual financial impact

When did the replacement tenant move in?

Was there a period without rent?

Was the replacement rent different?

Were there other relevant losses?

7. Get professional advice if there’s a dispute

Especially where the deposit or claimed losses are significant.

What Landlords Should NOT Do

When a tenant backs out before move-in, avoid reacting emotionally.

Don’t immediately spend the deposit

Don’t assume the entire amount automatically belongs to you.

Don’t leave the property vacant intentionally

You should generally take reasonable steps to minimize your loss.

Don’t stop advertising because “the tenant owes me anyway”

That can create problems when trying to establish your actual losses.

Don’t delete messages

Those messages may later become important evidence.

Don’t rely only on phone calls

Important decisions should be documented.

Don’t automatically assume “no keys = no tenancy”

The legal situation isn’t determined solely by whether the tenant physically collected the keys.

The Best Outcome Is Usually to Re-Rent Quickly

For most landlords, the goal shouldn’t be to turn the situation into a months-long dispute.

Imagine:

Option A:
Spend weeks arguing with the original tenant over $2,800 while the property remains empty.

Option B:
Immediately advertise, find a qualified replacement tenant and minimize the vacancy.

In many cases, Option B is much better business.

Because every additional week the property sits empty may mean:

lost rent + mortgage payment + condo fees + property tax + utilities + additional stress.

Good property management is often less about “winning the argument” and more about:

reducing the financial damage quickly.

A Simple Example

Let’s put everything together.

Original lease

Rent: $2,800/month
Start date: September 1
Deposit: $2,800

August 20

Tenant says:

“I’m not moving in.”

August 20

Landlord saves the message and immediately relists the property.

August 22–27

Landlord conducts several showings.

August 28

A qualified replacement tenant signs.

September 5

New tenant moves in.

Now the landlord has a clear timeline showing:

when the original tenant cancelled → when the property was relisted → what efforts were made → when the replacement tenant was found → what financial loss actually occurred.

That’s much stronger than simply saying:

“They broke the lease, so I kept $2,800.”

How Can Landlords Reduce This Risk Before Move-In?

You can’t prevent every tenant from changing their plans.

But you can make the process much easier to manage.

Before confirming a tenancy:

Screen carefully

Make sure the tenant’s employment, income, credit and rental history make sense.

Use a proper written lease

Clearly document the rent, commencement date and responsibilities.

Keep all payment records

Document exactly what each payment is for.

Stay in communication before move-in

Confirm key pickup, insurance, utilities where applicable and move-in arrangements.

Don’t stop keeping records once the lease is signed

The period between signing and move-in can still create problems.

Final Thoughts

A tenant signs the lease.

Pays the deposit.

Then says:

“Sorry, I’m not moving in.”

It’s frustrating—but the landlord’s next move matters.

Don’t focus only on:

“Can I keep the deposit?”

Instead, think:

Re-rent quickly + document everything + determine the actual loss.

A rent deposit isn’t automatically a cancellation penalty.

At the same time, a tenant signing an agreement and then backing out doesn’t necessarily mean there are no consequences.

The exact outcome depends on the agreement, timing, mitigation efforts and actual losses involved.

At Topro Manage, this is exactly why professional property management goes beyond finding a tenant and collecting rent.

From tenant screening and lease preparation to move-in coordination, documentation, re-renting and dispute management, having the right process in place can prevent a last-minute problem from becoming a much bigger financial loss.

A good landlord doesn’t just react to problems—they keep the records needed to handle them properly.

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