How Prorated Rent Works in Ontario (Plus First & Last Month’s Rent Explained)
Moving into a rental in Ontario doesn’t always line up neatly with the 1st of the month. Sometimes the landlord wants the lease to officially start on the 1st, but is willing to let you move in earlier — and that’s where prorated rent, first month’s rent, and the last month’s rent deposit (LMR) can get confusing fast.
This guide breaks down what prorated rent is, when it usually applies, and how renters can estimate the total amount that may be due up front — including a real example you can copy and paste into your own planning.
Quick navigation
- What prorated rent is (and why it happens)
- The most common “lease starts on the 1st” scenario
- How prorated rent is usually calculated
- Example: $3,000 rent + a mid-month move-in
- What “first and last” means in Ontario
- Key deposits (what’s normal)
- What to confirm in writing (to avoid surprises)
- Helpful tools & next steps
What Prorated Rent Is (And Why It Happens)
Prorated rent is a partial rent amount charged when you occupy a unit for only part of a month. Instead of paying a full month, you pay only for the days you’ll be living there.
Quick clarity
Prorated rent = monthly rent divided into daily rent.
Then you pay for the number of days you’ll occupy the unit during that partial period.
Different landlords may calculate it slightly differently, which is why it’s smart to confirm the method in writing.
The Most Common Ontario Scenario: Lease Starts on the 1st, Move-In is Earlier
This is the situation that causes the most confusion: the landlord wants the lease to officially start on the 1st of the month, but is willing to allow an earlier move-in date.
When that happens, you may be asked to pay a prorated amount for those extra days — in addition to the standard first/last month amounts.
Why landlords do this
- Many leases and rent cycles are built around the 1st
- It’s simpler for renewals, notices, and future rent increases
- If the unit is vacant, an earlier move-in can be a win-win
How Prorated Rent Is Usually Calculated
The most common approach is daily proration:
The simple formula
Monthly rent ÷ number of days in the month × number of days owed
“Days owed” typically includes the move-in day through to the end of the month.
Example: $3,000 Rent + a Mid-Month Move-In
Let’s say:
- Monthly rent: $3,000
- Lease starts: January 1
- Landlord allows move-in: December 18
- December has 31 days
Step 1: Calculate daily rent
$3,000 ÷ 31 = $96.77/day
Step 2: Count the days owed
December 18–31 is 14 days (including the 18th).
Step 3: Prorated rent amount
$96.77 × 14 = $1,354.78
What renters often miss
In this scenario, you may still be paying standard deposits for the lease starting January 1 (first month + LMR), plus the prorated amount for the earlier move-in.
What “First and Last Month’s Rent” Means in Ontario
In Ontario, the most common up-front amounts are:
- First month’s rent (for the first rental period)
- Last month’s rent deposit (LMR) (held and applied to your final month)
Tip: LMR is not an extra fee — it’s a deposit applied to your last month, assuming the tenancy continues normally.
Key Deposits (What’s Normal)
In addition to first and last, you may see a key deposit. Key deposits are typically refundable when keys are returned, and should be reasonable.
If you want official consumer guidance, here’s a helpful starting point: RECO — Renting in Ontario.
What to Confirm in Writing (To Avoid Surprises)
Before paying anything, it’s smart to confirm:
- The lease start date and your move-in date
- How the landlord is calculating prorated rent
- What the prorated amount is considered (rent vs occupancy fee)
- When each amount is due (signing vs move-in)
- Any key deposits and refund terms
Helpful Tools & Next Steps
If you want to estimate your numbers quickly (including proration, first/last, key deposit, and total due up front), use the calculator here: Rental Deposit + Proration Calculator (Ontario)
Helpful reads (and city rental guides)
If you’re planning a move, these tools and guides pair well with this topic:
The Bottom Line
Prorated rent is common when move-in dates don’t line up with the 1st — and it’s not automatically a red flag. The important part is understanding how it’s calculated, what your total up-front costs look like, and confirming the details in writing.
