Posted under: Family Law, DB
Alberta’s rules for valuing a non-member spouse’s share of a defined benefit (DB) pension are detailed and precise. The rules for determining the member’s remaining pension after the division are not, and in our worked example, the choice of method adopted by the administrator can result in a reduction to the member’s pension that exceeds twice the amount of pension that was reflected in determining the lump sum value provided to the non-member spouse at the time of division.
By Pat Johnston, FCIA, FSA | GBL | October 30th, 2026
When a defined benefit pension is divided following a relationship breakdown (separation or divorce), considerable attention is typically given to calculating the amount payable to the non-member spouse. Much less attention is typically paid to the member’s residual pension, being the pension entitlement the member ultimately retains after the division.
This is an important issue for plan sponsors, administrators, and members alike. Alberta’s pension legislation provides detailed rules for determining the value to be transferred to a non-member spouse, but relatively little direction on calculating the member’s residual pension. As a result, different approaches are applied across pension plans, and these approaches can produce materially different outcomes for members.
In many cases, members are unable to obtain a clear explanation of how their pension will ultimately be adjusted following a division. Members may therefore lack the information they need to fully assess the long-term impact of their options at the time of division. This includes the choice to divide the pension at source or offset its value through other family assets.
The example below illustrates how the amount payable to a non-member spouse is determined under Alberta pension legislation. It then shows how different methods for determining the member’s residual pension can lead to significantly different retirement outcomes than the member might otherwise expect.
A Family Property Order or Agreement (FPO/A) is filed on May 1, 2026, with respect to Bob’s defined benefit pension entitlement. The order specifies that the period of joint accrual ends on May 1, 2026, and that Jane, the non-member spouse, is entitled to receive 50% of the pre-division benefit.
At the date of division:
The relevant plan provisions are:
Alberta’s Employment Pension Plans Act and Employment Pension Plans Regulation (together, the EPPA/R) provide a detailed framework for determining the amount that may be transferred to a non-member spouse following a relationship breakdown. It works in three steps as follows, by determining the:
At May 1, 2026, Bob has accrued a pension of $60,000 per year ($100,000 × 2% × 30 years).
To determine the commuted value of this pension, the administrator applies the assumptions and methods prescribed under applicable standards, including:
Because Bob would qualify for an unreduced pension at age 55 had he terminated employment at the division date, age 55 is assumed to be the pension commencement date for purposes of the calculation.
Since Bob’s entire period of credited service was earned during the relationship, the period of joint accrual and total plan service are both 30 years. The FPO/A provides that Jane is entitled to 50% of the pre-division benefit.
Applied to Bob’s pension
| Total entitlement | $904,746 |
| Total pre-division benefit | $904,746 × (30.00 ÷ 30.00) = $904,746 |
| Amount payable to Jane (50%) | $452,373 |
Interest will generally be added from the end of the period of joint accrual until the transfer date, provided the transfer occurs within 180 days following May 1, 2026. If the transfer occurs after that period, the amount payable is recalculated at the transfer date using the assumptions applicable at that time, while continuing to assume that Bob terminated employment on May 1, 2026.
| Key observation: the non-member spouse’s share The legislation provides detailed guidance on determining the amount that may be transferred to the non-member spouse. The process is generally well defined and produces a specific transfer value at the date of division. |
While the EPPA/R provides detailed rules for determining the amount that may be transferred to a non-member spouse, it provides comparatively little guidance on determining the member’s residual pension following the division.
The legislation requires only that the residual pension be determined in accordance with “generally accepted actuarial principles.” This has resulted in a variety of methods being adopted across the pension industry. Although these methods may satisfy actuarial and legislative requirements, they can produce materially different outcomes for members.
The three methods below illustrate how different approaches affect the outcome in Bob’s example. Different methods are designed to achieve different objectives.
The purpose of the examples shown here is not to identify a preferred approach, but rather to illustrate how different approaches can produce materially different outcomes.
For each, assume that Bob continues employment until age 65, is single at retirement, and has highest average earnings of $135,000 at that time. Under the plan provisions, he has reached the maximum 35 years of credited service.
Without a division, Bob’s pension at age 65 would be $94,500 per year ($135,000 × 2% × 35).
Under this approach, the objective is to place the pension fund in the same financial position at the member’s retirement as if the pension division had not occurred. Conceptually, this approach can be viewed as occurring in four steps:
Applied to Bob’s pension
| (i) Pension before division adjustment | $94,500 (= $135,000 × 2% × 35) |
| (ii) Amount transferred to Jane, accumulated at 5.50% per year for 13 years | $907,358 |
| (iii) Equivalent annual pension at retirement | Commuted value basis: $59,229 Going-concern funding basis: $64,892 |
| (iv) Residual pension payable to Bob | Commuted value basis: $35,271 (= $94,500 − $59,229) Going-concern basis: $29,608 (= $94,500 − $64,892) |
| Key observation: Method 1 In this example, the reduction in Bob’s pension under Method 1 ranges from $59,229 to $64,892 per year, depending on the actuarial basis used to convert the accumulated amount into a lifetime pension. That reduction exceeds the $30,000 annual pension that was reflected in determining the value transferred to Jane at the division date. This is because the transfer value to Jane incorporated the value of the early retirement subsidy available at age 55. Since Bob ultimately retires at age 65, he does not receive the benefit of that subsidy, yet the transfer value already reflected its value. The plan is effectively recovering the value of the early retirement subsidy included in the transfer to Jane by increasing the offset to Bob beyond the expected $30,000 offset for the plan to remain in the same financial position as if the division had not occurred. As a result, the economic impact of the division may differ significantly from the annual pension amount used to determine the spouse’s share at the date of division. |
Under this approach, the member’s credited service is reduced in proportion to the share of the pension transferred to the non-member spouse. This is done in two steps:
Bob had 30 years of credited service at the division date. Since 50% of the value of the pre-division benefit was transferred to Jane, the administrator removed 15 years of credited service (50% of the credited service reflected total pre-division benefit).
Applied to Bob’s pension
| (i) Credited service removed | 15 years (50% of 30 years) |
| (ii) Pension at retirement | $54,000 (= $135,000 × 2% × 20 years*) |
| Reduction from the $94,500 otherwise payable | $40,500 per year |
* Bob’s total service is limited to 35 years under the plan terms. As such, the reduction of 15 years to reflect the transfer to Jane is applied to the 35 years of plan service that Bob had accrued at age 65.
| Key observation: Method 2 Under this method, with the removal of the pension related to 15 years of credited service, the future increase in the pension related to those 15 years that would otherwise arise from higher average earnings is also removed. The annual pension reduction at retirement is $40,500, compared to the $30,000 annual accrued pension that was reflected in determining the spouse’s transfer value at the division date. |
Under this approach, the member’s future retirement pension is reduced by the portion of the accrued annual pension that was reflected in the value transferred to the spouse. This is done in two steps:
Applied to Bob’s pension
| (i) Bob’s accrued pension at the division date | $60,000 per year |
| (ii) Reduction (50% of the value was transferred to Jane) | $30,000 per year |
| (iii) Bob’s retirement pension | $64,500 (= $94,500 − $30,000) |
| Key observation: Method 3 In this example, the annual pension reduction corresponds directly to the portion of Bob’s accrued pension that was reflected in determining the transfer value paid to Jane. However, this method may not produce appropriate results under all circumstances. For example, if the transfer value had been determined assuming a pension commencement age later than the age at which the member actually elects to commence the pension, the reduction in the annual pension to the member could be greater than would be determined by the value of the pension that was transferred to the spouse. While this method may appear to produce an intuitive result in this example, its appropriateness depends on the specific provisions of the pension plan and the circumstances surrounding the division and retirement. |
The methods that were illustrated are not intended to represent all approaches used in practice. They are simplified examples designed to highlight how different underlying objectives for division by plan administrators can produce very different member outcomes.
The same $452,373 transfer to Jane produces very different retirement outcomes for Bob under the three illustrated methods. For reference, the accrued pension reflected in Jane’s transfer value was $30,000 per year.
| Method | Annual reduction at 65 | Bob’s pension at 65 | What drives the result |
| No division (baseline) | — | $94,500 | $135,000 × 2% × 35 years |
| Method 1: Maintain the plan’s financial position | $59,229–$64,892 | $29,608–$35,271 | The transfer value reflected an early retirement subsidy available at age 55 that Bob ultimately did not receive because he continued employment until age 65. The range reflects the commuted value vs. going-concern conversion basis. |
| Method 2: Reduce credited service | $40,500 | $54,000 | Removes 15 years of service; the reduction also reflects lost future salary growth on those years. |
| Method 3: Reduce by the pension reflected in the transfer value | $30,000 | $64,500 | Matches the accrued pension used to value the transfer, but could overstate the reduction if the transfer assumed a later start age than actual retirement. |
Figures are from the worked example above and are illustrative only.
The determination of a member’s residual pension following a pension division involves complex actuarial and administrative considerations. While Alberta pension legislation provides detailed guidance on the amount payable to a non-member spouse, it provides relatively little direction on how the member’s remaining pension should subsequently be determined.
As the example shows, different methods can produce materially different retirement outcomes, even when the same amount is transferred to the non-member spouse at the date of division.
For plan sponsors and administrators, it is important to understand the method being applied within their pension plan and to assess whether the resulting outcomes align with the plan’s objectives and expectations.
For members, understanding the method applied by their pension plan administrator is equally important. It may significantly affect the ultimate value of their retirement benefit and may influence decisions about the treatment of pension assets during relationship breakdown negotiations.
Under Alberta’s Employment Pension Plans Act and Regulation, the administrator first calculates the member’s total entitlement: the commuted value of the pension accrued to the end of the period of joint accrual, assuming the member terminated employment on that date. Multiplying it by the period of joint accrual divided by total plan service gives the pre-division benefit. The non-member spouse receives the percentage set out in the order or agreement, up to 50%.
The non-member spouse receives the percentage specified in the Family Property Order or Agreement, subject to a statutory maximum of 50% of the pre-division benefit. In this article’s example, Jane is entitled to the full 50% of Bob’s $904,746 pre-division benefit, or $452,373.
Alberta’s legislation requires only that the member’s residual pension be determined in accordance with “generally accepted actuarial principles,” so methods vary from plan to plan. Approaches include maintaining the plan’s financial position, reducing credited service, and reducing the pension by the amount reflected in the transfer value. In this article’s example, these methods leave the member with an annual pension at 65 of $29,608 to $64,500.
The transfer value can reflect benefits the member never ends up receiving. In this article’s example, the transfer value included the value of an early retirement subsidy available at age 55, but the member retires at 65. Under Method 1, the member’s pension is reduced by $59,229 to $64,892 per year, well above the $30,000 annual pension reflected in the transfer value. Under Method 2, the reduction also reflects lost future salary growth.
It depends on the circumstances, but the plan’s method for determining the residual pension is a key input. Because different methods can reduce the member’s pension by very different amounts, members should understand how their plan will calculate the residual pension before choosing between dividing the pension at source and offsetting its value with other family assets. A family lawyer can advise on the options, and an actuary can quantify the long-term impact of each.
Generally not. The EPPA/R provisions are much more straightforward for pensions already in pay. In general the total value of the pension in pay, including the value of any survivor pension that would be payable had the division not occurred is determined, then divided in accordance with the Family Property Order or Agreement. The portion of the value allocated to the non-member spouse is converted into a lifetime pension payable to the non-member spouse. The remaining value is then converted into a lifetime pension to the member. In total the value of the two separate pensions immediately following division is equal to the value of the pension immediately before division.
GBL is a Calgary-based actuarial consulting firm, with offices in Toronto, providing pension division calculations on relationship breakdown, commuted value calculations, expert witness services, and pension consulting for plan sponsors.
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About the author: Pat Johnston, FCIA, FSA, is a Senior Vice President with GBL and has over 40 years of actuarial and pension experience. In 2003, he founded Pension Strategies Inc which joined GBL in 2023. Pat continues to provide services for corporate and public sector pension plans, IPPs, RCAs, family law pension-related services, and other expert evidence work.
*This article provides general information about Alberta pension legislation and is not legal or actuarial advice for any specific situation. The example is illustrative; actual results depend on the plan’s provisions, the applicable assumptions, and the terms of the order or agreement.
