Line 20800 on the T1 General is where you claim your Registered Retirement Savings Plan deduction. Whatever amount you enter there comes off your total income before tax is calculated, which either lowers what you owe or increases your refund. For the 2026 tax year, the absolute ceiling on RRSP contributions is $33,810, but your own limit is almost always lower and depends on your earned income, any workplace pension adjustments, and unused room carried forward from earlier years.
Finding Your Personal Deduction Limit
Your deduction limit is not something you calculate from scratch each year. The CRA does it for you and prints the result on your most recent Notice of Assessment. You can also see the current figure in CRA My Account. That number already reflects the full formula: 18% of the prior year’s earned income up to the annual dollar limit, minus any pension adjustment from your employer, plus unused room carried forward.1Canada.ca. How Contributions Affect Your RRSP Deduction Limit
Check that number before you contribute, not after. If you disagree with it, the T4040 guide walks through the full calculation.
What Counts as Earned Income
Not every dollar you earn builds RRSP room. The CRA totals your employment income, net self-employment income, net rental income from real property, CPP or QPP disability payments, and taxable support payments received, then subtracts employment expenses, business losses, rental losses, and deductible support payments paid.2Canada.ca. RRSPs and Other Registered Plans for Retirement
Investment income does not count. Interest, dividends, and capital gains build no new room. Neither do Old Age Security, regular CPP retirement benefits, or Employment Insurance. Someone who stops working and lives off investments will see their contribution room stop growing, though any room already accumulated stays available.
How Pension Adjustments Reduce Your Room
If your employer runs a registered pension plan or deferred profit-sharing plan, box 52 of your T4 will show a pension adjustment. That figure represents the value of the retirement benefits accruing to you through the workplace plan, and the CRA subtracts it from the RRSP room you would otherwise receive the following year.1Canada.ca. How Contributions Affect Your RRSP Deduction Limit
If you leave a pension plan before your benefits vest, you may receive a pension adjustment reversal that restores some of that lost room. Your Notice of Assessment already accounts for these adjustments, which is why the number on the NOA is the one to rely on.
Schedule 7 and the Receipts That Feed Line 20800
You do not put a raw contribution total on Line 20800. You fill out Schedule 7 first. Schedule 7 is where you list your total contributions, designate any Home Buyers’ Plan or Lifelong Learning Plan repayments, and calculate the actual deduction you want to claim. The result flows to Line 20800.3Canada.ca. Line 20800 – RRSP Deduction
Your financial institution issues official contribution receipts. You receive one receipt for contributions made in the first 60 days of the calendar year (applicable to the prior tax year) and another for contributions made during the remaining 10 months. Paper filers attach these receipts; electronic filers keep them on hand but do not submit them.3Canada.ca. Line 20800 – RRSP Deduction Hold on to everything for at least six years; the CRA can request supporting documents at any point in that window.4Canada.ca. How Long Should You Keep Your Income Tax Records
Contribution Deadline and the Age 71 Cutoff
Contributions for the 2026 tax year can be made from January 1, 2026 through March 1, 2027. Anything deposited in the first 60 days of 2027 can still be claimed on the 2026 return.5Canada Revenue Agency. Contribution Year Those early-2027 contributions can also be held back and claimed on the 2027 return instead. You choose the year that gives you the better tax result.
You can hold an RRSP only until December 31 of the year you turn 71. After that, the account has to be converted to a Registered Retirement Income Fund or used to buy an annuity.6Canada.ca. RRSP Options When You Turn 71 If your spouse or common-law partner is younger than 72, you can still contribute to a spousal RRSP after your own plan closes, as long as you have contribution room.
How Much to Actually Claim
You do not have to deduct everything you contribute in the same year. This is one of the more useful features of the RRSP. If your income is temporarily low, you can contribute now to secure the tax-sheltered growth and hold the deduction for a year when your income puts you in a higher bracket. Unused deduction amounts carry forward with no expiry.1Canada.ca. How Contributions Affect Your RRSP Deduction Limit
An RRSP deduction saves tax at your top marginal rate. A common approach is to claim just enough to drop yourself to the bottom of your current bracket and carry the rest forward for a higher-income year later.
Claiming a Spousal Contribution on Your Line 20800
You can contribute to a spouse’s or common-law partner’s RRSP and claim the deduction on your own Line 20800. It uses your room, not theirs, and your combined deduction (personal plus spousal contributions) cannot exceed your personal limit.7Canada.ca. Contributing to Your Spouse’s or Common-Law Partner’s RRSPs
Watch the attribution rule. If the annuitant spouse withdraws funds in the year of contribution or in either of the two preceding calendar years, the CRA attributes the withdrawn amount back to the contributing spouse for tax purposes.8Canada.ca. Withdrawing From Spousal or Common-Law Partner RRSPs
Home Buyers’ Plan and Lifelong Learning Plan Repayments
If you have withdrawn under the Home Buyers’ Plan or Lifelong Learning Plan, you owe scheduled repayments back into your RRSP. When you contribute in a year a repayment is due, you designate part of that contribution as the repayment on Schedule 7. The repayment portion does not generate a deduction on Line 20800; it just satisfies what you borrowed from yourself.9Canada Revenue Agency. How to Repay the Amounts Withdrawn From Your RRSPs Under the Home Buyers’ Plan
Miss a required repayment and the CRA adds the shortfall to your taxable income on line 12900 for that year.9Canada Revenue Agency. How to Repay the Amounts Withdrawn From Your RRSPs Under the Home Buyers’ Plan LLP repayments work the same way, designated on Schedule 7, with any shortfall becoming taxable income.10Canada.ca. Repayments to Your Registered Retirement Savings Plan Under the Lifelong Learning Plan
If You Contribute More Than Your Limit
The CRA allows a $2,000 lifetime cushion above your deduction limit without penalty. Anything above that cushion is taxed at 1% per month for every month the excess sits in the plan.11Canada.ca. Excess Contributions On a $15,000 over-contribution, that is $150 every month until you withdraw the excess or grow enough new room to absorb it.
If you are over the limit, file Form T1-OVP within 90 days after the end of the calendar year the excess existed, and pay the penalty tax by the same deadline.11Canada.ca. Excess Contributions After the CRA processes your return, a fresh Notice of Assessment will confirm the deduction accepted on Line 20800 and show your updated room for next year. If the CRA’s figure does not match what you claimed, the mismatch is usually between your receipts and what your financial institution reported; sort it out early.