What it means
Putting money into an RRSP is a simple act, but the rules around it deserve care. Each person has a personal limit, which depends on past earnings and past use of the plan.
The tax authority reports the figure on an annual notice of assessment, so you do not need to work it out from scratch. The limit is made up of several parts.
New room is earned each year as a percentage of the previous year's earned income, up to an annual dollar cap set by the tax authority. Unused room from earlier years carries forward, and the room is reduced by the pension adjustment if you belong to a workplace pension plan.
Contributions can be made during the calendar year or in a short window after year end, usually the first two months of the next year. Money paid in during that window can still be claimed against the previous year's income.
This is helpful for people who only know their final income after the year closes. Contributions can be made in cash or, in some cases, by transferring investments into the plan.
Spousal contributions are also possible, where one partner contributes to a plan owned by the other. The goal is to even out retirement incomes between the couple and lower their combined tax.
Over-contributing leads to a penalty tax on the excess, charged each month until it is removed. There is usually a small buffer allowed for honest errors, but beyond it the penalty applies.
Anyone who makes a mistake should withdraw the excess promptly and speak to their adviser. For employers, payroll contributions to a group plan should be handled carefully.
Deducting the money at source gives staff the tax saving immediately in their paycheques, because tax withholding can be reduced. Employers also need to make sure that their records match what the staff report on their tax returns.
In practice
Real-world examples.
Example
A teacher receives her tax assessment notice, which shows room of $12,000. She contributes $12,000 in February, within the 60-day window, and claims the deduction against last year's income. Her refund arrives in the spring.
Example
A couple wants to reduce their combined retirement taxes. The higher-earning partner contributes to a spousal RRSP owned by the lower-earning partner. In retirement the withdrawals will be taxed mostly in the hands of the lower earner.
Example
A business owner realises that he contributed $5,000 more than his room allowed. He withdraws the excess within a month and fills in the forms to reduce the penalty. His accountant advises him to check the room figure before each contribution.
Formula
Calculation
Remaining room = (earned-income room + unused room carried forward) - pension adjustment - contributions already made
Suppose a person earned $90,000 last year and the room percentage is 18% (an assumed rate for this example, and the dollar cap is not reached). New room = 90,000 x 0.18 = $16,200. She has $4,000 of unused room from earlier years, a pension adjustment of $3,000 and has already contributed $10,000. Remaining room = 16,200 + 4,000 - 3,000 - 10,000 = $7,200.Case study
Seen in the real world.
Birchfield Dental is an illustrative, fictional practice whose owner, Dr Amara, earned $200,000 one year after a long period of lower income. Her contribution room, including carried-forward amounts, was $40,000.
She contributed $40,000 and, at a marginal tax rate of 45%, saved 40,000 x 0.45 = $18,000 in tax. Her accountant suggested she claim only $25,000 that year and carry forward the remaining $15,000 deduction to a later year when her tax rate would still be high.
The result was a better overall tax outcome across two years. The illustrative lesson is that planning when to make and when to claim a contribution can matter as much as the amount. Dr Amara also set up a monthly standing instruction for the following year, so that her contributions would be spread across the year rather than left to the final weeks. Her accountant added a reminder to check the contribution room figure each January, before any money was moved.
Watch out
Common mistakes.
- Guessing the contribution room instead of checking the official figure, which can lead to a penalty.
- Forgetting that a workplace pension reduces room through the pension adjustment.
- Missing the early-year window and losing the chance to claim a deduction against the previous year.
Questions
People also ask.
Where do I find my contribution room?
It is shown on your notice of assessment from the tax authority and in your online tax account.
Can I contribute in kind?
In some cases you can transfer investments into the plan, but the rules differ, so check with your plan provider.
Is the contribution deadline the same every year?
It is a set window after year end, but it can move when it falls on a weekend, so confirm the date each year.
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