LOL! I spent a panicked 20 minutes yesterday double checking all my income amounts (T4's that I finally have) against my RRSP receipts (some of which have not yet arrived) to ensure I am ok. Yep.. I think I am only $1500 over contributed for last year.
On a previous year, I was required to withdraw $5000. They will waive the penalty if you have a first offense and rectify it (take it out) as soon as you can.
So over there, the amount of money you can contribute to a tax deferred account is calculated over the year you contribute in? That sounds very complicated! In my country, the amount of money you can contribute is calculated using last years' numbers, i.e. to know how much I can contribute in 2018, I look at the income in my 2017 tax return, so you always know exactly how much you can contribute in advance.
No, it's the same.
It's that on the T4 for the whole year, I can better see exactly how much was my mandatory contribution to the pension fund. On another T4, I needed to verify the RRSP automatic matching contribution amounts. I have three T4's this year, so the income varies, as well as the matching / pension amounts.
The amount able to contribute uses last year's amount, (like you) I just needed to determine how much I have contributed, to determine how much I can lump sum to max it out.
I always get confused about the employer portion of the RRSP match -- I don't get a tax receipt for it, but it DOES go against my maximum calculation, correct? I know that I get a Pension Adjustment (against next year), so it seems fair that there would be RRSP reduction for the employer match portion too, right? What tax slip is that reported on? Does it only apply to the next year available amount, or to this year's contribution?
ETA: Box 40 on the T4 slip shows the combined employee / employer match RRSP contributions, but the RRSP tax slip will only show the employee portion (because the employer matched portion is untaxed at time of contribution).