A beneficiary planning a large withdrawal from a Registered Disability Savings Plan (RDSP) sometimes hesitates for a reason that doesn’t actually apply here. Taxable income from other sources can reduce benefits like the GST/HST credit or the Canada Child Benefit, so it’s a reasonable worry to carry into an RDSP withdrawal too. It doesn’t carry over. The Canada Revenue Agency specifically excludes RDSP income from the calculations behind the GST/HST credit, the Canada Child Benefit, the Canada Workers Benefit, Old Age Security clawback, the Guaranteed Income Supplement, and the refundable medical expense supplement. A withdrawal that’s fully taxable on your return can still leave every one of those other benefits completely untouched.
That single exclusion is arguably the most useful thing to know about RDSP taxation, but it sits alongside a set of ordinary mechanics that determine how much of any given withdrawal actually counts as income in the first place, how it gets reported, and when tax gets withheld before the money even reaches the beneficiary.
Every Withdrawal Is a Blend, Not a Choice
Unlike a Registered Education Savings Plan, where a subscriber can specifically request a Post-Secondary Education withdrawal of pure contributions separate from a taxable Educational Assistance Payment, an RDSP doesn’t let anyone pick and choose. Every Disability Assistance Payment (DAP) or Lifetime Disability Assistance Payment (LDAP) includes a proportional mix of whatever categories of money are sitting in the plan, contributions, rollover amounts, grants, bonds, and investment growth, all blended together according to how much of each category the account actually holds. You can’t request a withdrawal made up entirely of your own tax-free contributions, even if that’s genuinely all you want out.
What Counts as Taxable, and What Doesn’t
Your own contributions come out completely tax-free, since that money was never deducted from income when it went in. Everything else, the Canada Disability Savings Grant, the Canada Disability Savings Bond, any amount rolled over from an RESP or a deceased parent’s RRSP or RRIF, and every dollar of investment growth the plan has earned, counts as taxable income to the beneficiary in the year the payment is made. This is a meaningfully wider taxable category than what an RESP treats as taxable, since a rollover amount specifically retains its taxable status inside an RDSP even though it arrived from another registered account rather than as a direct RDSP contribution.
How It Gets Reported
The taxable portion of every withdrawal shows up in box 131 of a T4A slip issued to the beneficiary, and gets reported on line 12500 of their personal income tax return for that year. If the beneficiary has already passed away by the time a payment is made, the taxable portion becomes income of the beneficiary’s estate instead, reported on the estate’s own return rather than a return filed in the beneficiary’s name.
When Withholding Tax Actually Kicks In
Financial institutions don’t automatically withhold tax on every RDSP payment. Withholding only starts once the total taxable portion of a beneficiary’s withdrawals for the year climbs above a specific threshold, calculated by adding together two federal non-refundable tax credits, the basic personal amount and the disability amount. For 2026, that combined threshold works out to roughly $26,793, meaning a beneficiary whose total taxable RDSP income for the year stays under that figure sees no tax withheld at source at all, even though the amount still has to be reported on their return. Cross that line and the institution starts withholding on the excess, similar in spirit to how withholding works on other lump-sum registered account withdrawals.
The Benefits That Don’t Get Touched
This is worth restating plainly because it changes how a family might plan a large withdrawal. The taxable portion of an RDSP payment is specifically carved out when the CRA calculates eligibility and amounts for several other federal programs, including the GST/HST credit, the Canada Child Benefit, the Canada Workers Benefit, the Old Age Security clawback calculation, the Guaranteed Income Supplement, and the refundable medical expense supplement. A beneficiary who also receives one or more of these doesn’t need to worry that a larger RDSP withdrawal in a given year will quietly shrink a benefit calculated somewhere else on the same tax return. The two systems simply don’t talk to each other for this purpose, by design.
The Terminal Illness Exception’s Own Small Print
A beneficiary certified by a medical practitioner as having a life expectancy of five years or less can elect specified disability savings plan status, which removes the usual restrictions covered in how much can actually be withdrawn each year. There’s a specific dollar figure tied to the tax side of this election too. Withdrawals under this status won’t trigger repayment of grants and bonds under the 10-year rule as long as the combined taxable portion of everything withdrawn in the year stays at or under $10,000, unless the plan’s own LDAP formula would otherwise require a larger amount. Go beyond that figure without the LDAP formula requiring it, and the usual repayment exposure comes back into play even under this exception.
Getting the Reporting Right
Confirm with the RDSP issuer exactly how much of a planned withdrawal falls into the taxable category before assuming a round number like $10,000 or $20,000 translates directly into that much taxable income, since the proportional blend means the real taxable figure is almost never identical to the amount requested and depends on how contribution limits and grant history have shaped the account over time. Check the T4A slip against your own records once it arrives, since box 131 is the only place this specific income shows up and it’s easy to overlook among other slips at tax time. And if a family is coordinating an RDSP withdrawal with other benefits already being received, this is the one place where the coordination genuinely isn’t necessary, since the RDSP grants and bonds behind the withdrawal and the taxable income they generate simply don’t factor into those other calculations at all.
