The refundable Québec abatement (line 44000): the $1,600 mistake
Québec residents get 16.5% of their basic federal tax back. Because the line sits below line 43500 on the return, almost every take-home calculation misses it.
Updated
If you live in Québec and you work out your take-home by subtracting line 43500 from line 15000, you have just made yourself more than a thousand dollars poorer on paper.
Here is why, and how to fix it.
What the abatement is
Québec runs programs that Ottawa runs everywhere else: its own pension plan, its own parental insurance plan, its own student loans. In exchange, the federal government collects less tax from Quebecers.
That reduction takes the form of a refundable abatement worth 16.5% of your basic federal tax (line 42900). You claim it on line 44000 of your federal return.
It is not a credit you have to qualify for or a deduction you have to elect. If you were resident in Québec on December 31, it is yours.
Why everybody misses it
It comes down to where it sits on the form.
line 42000 Net federal tax
line 42800 Provincial tax (nil in Québec)
...
line 43500 TOTAL PAYABLE ← most people stop here
...
line 44000 Québec abatement ← but it is down here
...
line 48200 Total creditsLine 43500 is called “total payable”, which makes it look final. But the abatement is filed under credits, further down the return. So subtracting line 43500 and stopping means charging yourself federal tax you never actually bore.
What it is worth
The abatement is 16.5% of your basic federal tax:
| Basic federal tax (line 42900) | Abatement (line 44000) |
|---|---|
| $5,000 | $825 |
| $10,000 | $1,650 |
| $15,000 | $2,475 |
| $25,000 | $4,125 |
For a couple the error happens twice. And because it scales with tax paid, it hits the higher earner harder — which distorts the split of shared expenses, not just the individual figures.
Where to find your number
On your federal return for the year, look for:
- Line 42900 — basic federal tax
- Line 44000 — refundable Québec abatement
If tax software prepared the return, line 44000 is already filled in. You only have to copy it across.
A quick sanity check
Divide line 44000 by line 42900. You should get roughly 0.165.
If you do not, you have probably read the wrong row — this is the line nobody has heard of, which makes it the easiest one to confuse. Our calculator runs this check for you and flags a mismatch.
There is one legitimate exception: if you ran a business with a permanent establishment outside Québec, the abatement is worked out on Form T2203 and the percentage can differ.