Pension income splitting has been available to Canadians since 2007. It's not new. It's not complicated. And yet, according to CRA data, a significant proportion of eligible retirees don't use it, and many who do use it aren't applying it at the optimal percentage.
For advisors, this is a low-hanging opportunity hiding in plain sight.
What It Is (and What It Isn't)
Pension income splitting allows one spouse to allocate up to 50% of eligible pension income to the other spouse for tax purposes. Critically, no money actually moves. It's a paper allocation on the tax return, both spouses simply report their share, and Revenue Canada taxes each accordingly.
The benefit is pure: if one spouse is in a higher tax bracket than the other, shifting income to the lower-bracket spouse reduces the couple's combined tax bill. In some provinces, the savings can exceed $5,000–$8,000 per year. Over a 20-year retirement, that's a meaningful number.
What Qualifies as Eligible Pension Income
This is where many advisors lose the thread. Not all retirement income qualifies for splitting, and the rules differ based on age.
At 65 and over, eligible income includes:
- Lifetime annuity payments from a pension plan
- RRIF withdrawals (this is the big one)
- Annuity payments from an RRSP
- Certain foreign pension income
Under 65, the list is shorter:
- Annuity payments from a pension plan (employer-sponsored)
- Certain disability payments
CPP and OAS are not eligible for pension income splitting. They have their own mechanisms (CPP sharing and OAS individual filing).
The most frequently missed item: RRIF withdrawals are eligible for splitting at 65. This matters enormously for clients who don't have a defined benefit pension but have substantial RRIF assets. Many advisors, and even more clients, assume splitting only applies to pension plan income. It doesn't.
The Optimal Percentage Is Rarely 50%
The default instinct is to split at 50% because that's the maximum. But optimal isn't always maximum.
The goal is to equalize marginal tax rates between spouses, and that calculation is specific to each couple's income picture. A 50% split might push the lower-income spouse into a higher bracket, or reduce the higher-income spouse's income below a threshold where other benefits kick in (such as age amount credits or OAS clawback reduction).
Running the calculation properly means modelling the full income picture for both spouses: CPP, OAS, RRIF, pension, non-registered income, and any applicable credits. The optimal split percentage is often somewhere between 20–40%, not 50%.
The OAS Clawback Connection
Here's where pension income splitting intersects with another planning strategy: OAS clawback reduction.
If a high-income spouse is having OAS recovered because their net income exceeds the threshold (approximately $90,997 in 2026), pension splitting can bring them below the clawback line. Every dollar of OAS clawback recovered is worth 15 cents directly, effectively a 15% return on the allocation decision.
For couples where one spouse earns significantly more than the other, combining pension income splitting with OAS deferral (or CPP sharing) can substantially improve after-tax retirement cash flow without changing anything about how they actually live.
Age Amount Credits: Another Piece of the Puzzle
The federal age amount, a non-refundable tax credit available at 65, phases out at higher income levels. In 2026, it begins reducing around $42,000 of net income and disappears entirely around $98,000.
A high-income spouse who would otherwise lose the age amount entirely may retain a portion of it through income splitting. The lower-income spouse, if their income stays below the threshold, keeps theirs. Done right, pension splitting can preserve both age amount credits for the couple.
Making It Part of Every Retirement Review
Pension income splitting isn't a one-time calculation. The optimal percentage can shift year to year as RRIF minimums change, CPP adjustments occur, and one spouse's income changes.
The advisors who deliver the most value here are the ones who re-run the optimization annually at tax time, not the ones who set a split percentage in year one and leave it alone for a decade.
The mechanics are simple. The tailoring is where the advisor earns their fee.
PlanBase calculates pension income splitting optimization as part of its tax planning module, including age amount credit preservation and OAS clawback reduction scenarios.