Pension Buyback Guide: Should You Buy Back Service? 2025

Updated March 2025 · 11 min read

A pension buyback allows you to purchase additional years (or partial years) of credited service in your defined benefit plan for periods when you were a member but didn't contribute — or contributed at a reduced rate. Buybacks can significantly increase your pension, but they come at a cost. This guide explains what can be bought back, how the cost is calculated, the tax treatment, and whether it's worth it.

What Service Can Be Bought Back?

The types of service eligible for buyback vary by plan, but commonly include:

• Maternity/parental leave: Periods of birth or adoption leave where contributions were reduced or stopped
• Other leaves of absence: Personal leave, sick leave beyond disability provisions, educational leave
• Part-time service: Upgrading partial pension credits from part-time periods to full-time equivalent
• Prior qualifying service: Past employment with an eligible employer where you weren't yet in the plan
• Service with another employer: Under reciprocal agreement, service from another plan may be transferable
• Probationary period: Some plans had waiting periods before membership — these may be buyable

How Buyback Costs Are Calculated

The cost of a pension buyback is actuarially determined — calculated to reflect the present value of the additional pension benefit you'll receive. This means:

• The older you are when you buy back, the more expensive it is (less time for money to compound)
• Higher-salary workers pay more for the same year of service
• The closer you are to retirement, the higher the cost

The calculation uses your current salary, age, expected retirement date, and the plan's actuarial assumptions. A 1-year buyback for a 55-year-old teacher earning $100,000 might cost $25,000–$45,000. For a 35-year-old, the same year might cost $100–$20,000.

Payment Options

Most plans allow you to pay for a buyback:

• Lump sum cash: Pay the full amount at once (can be made from RRSP if you have room)
• Payroll deductions: Spread over a period (often up to 5 years, sometimes longer)
• RRSP transfer: Transfer funds from an RRSP directly to pay for the buyback (avoids withholding tax)

The RRSP transfer option is often the most tax-efficient because no withholding tax applies and you're moving pre-tax money to pre-tax pension benefit.

Tax Treatment of Buybacks

Pension buyback payments are treated differently depending on the type of service:

• Current service buybacks (maternity leave, recent absence): Tax-deductible in the year paid, subject to RRSP room availability via a Past Service Pension Adjustment (PSPA)
• Pre-1990 past service: More favourable tax treatment, potentially deductible without triggering a PSPA
• Post-1989 past service: Requires a PSPA filing with CRA, which reduces your RRSP room

The plan administrator handles the PSPA reporting to CRA. Ensure you have sufficient RRSP room to accommodate the buyback, or explore the "grandfathered" options for older service periods.

Is the Buyback Worth It?

This is the core question. The financial analysis depends on:

Financial Return Analysis

Compare the cost of the buyback to the additional lifetime pension income. If buying 1 year of service increases your pension by $2,000/year and costs $30,000:

• Simple payback period: $30,000 ÷ $2,000 = 15 years
• If you retire at 60 and live to 85, you receive $50,000 in additional pension over 25 years
• Plus: indexation means that $2,000 grows over time — the real return improves significantly

For indexed plans, buybacks typically provide excellent financial returns if you live past the breakeven age (usually 75–80).

The "Threshold Effect"

The most compelling case for a buyback is when it helps you cross a threshold:

• One more year takes you from 84 to 85 factor — enabling unreduced early retirement 1 year sooner
• Additional service increases a survivor pension for a spouse with limited income

In threshold cases, the financial benefit can be several times the buyback cost.

When Buybacks Are Less Attractive

• You're young with many working years ahead — focus on current contributions, not expensive past service
• You have high-interest debt that should be paid first
• The plan is poorly funded and there's counterparty risk
• You have insufficient RRSP room to handle the PSPA cost-efficiently

Steps to Evaluate a Buyback

1. Contact your plan administrator for a buyback cost estimate
2. Calculate the additional annual pension from the buyback
3. Determine how many years to breakeven
4. Assess whether you cross any threshold (85 factor, etc.)
5. Check your RRSP room for PSPA implications
6. Consult a financial advisor before committing