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How to calculate your CPP retirement pension

How to calculate your CPP retirement pension
Written by Doug Runchey
To calculate your CPP retirement pension, the first thing you should do is go online to the My Service Canada site and obtain your most recent CPP Statement of Contributions (SOC).
Also on the My Service Canada site, you can request an estimate of your CPP benefits. These estimates are very accurate if you’ll be eligible for your CPP retirement pension in the next few years. Otherwise, they can be misleading, especially if your future earnings will be significantly higher or lower than your previous average lifetime earnings.
If an estimate of your CPP retirement pension is not accurate enough for your purposes, you can do a more precise calculation of your CPP retirement pension. I’ll explain each of the steps in the calculation briefly in this article, and then you can ask questions if anything is unclear or you need more detail.
Step 1 – Calculate your number of contributory months (NCM)
Your contributory period begins either the month after you turn 18 or in January 1966, whichever is later. It ends either the month you turn 70 or the month before the month that your CPP retirement pension starts, whichever is earlier. Your contributory period excludes any month that you received a CPP disability benefit.
Your NCM would simply be the total number of months in your contributory period, minus any months excluded as a result of receiving CPP disability benefits.
For example, the contributory period of someone applying for the CPP at age 65 in 2013 or later, and having never received CPP disability benefits, would be 47 years (from age 18 to age 65). The NCM would be 564 months (47 years x 12 months).
Step 2 – Calculate your Total Adjusted Pensionable Earnings (TAPE)
First, find the “Your pensionable earnings” amounts for each year on the SOC that you got from the My Service Canada web site. These are referred to as your Unadjusted Pensionable Earnings (UPE).
For each year, divide the UPE for that year by the corresponding Year’s Maximum Pensionable Earnings (YMPE).
The following two links will provide you with a list of all YMPEs since the CPP began in 1966:
Next, multiply that result by the average YMPE for the five-year period ending in the year that your CPP will start.
(UPE/YMPE) x average YMPE for five-year period
Example calculation using the year 2013:
The average YMPE for the five-year period ending 2013 is $48,600, based on YMPEs of $46,300 for 2009, $47,200 for 2010, $48,300 for 2011, $50,100 for 2012, and $51,100 for 2013.
($46,300 + $47,200 + $48,300 + $50,100 + $51,100)/5 = $48,600
So if a person had a UPE of $4,000 in 1966, the APE calculation would be:
($4,000/$5,000 (the YMPE for 1966) x $48,600 (the average YMPE for the five-year period ending in 2013)
The resulting APE would be $38,880.
This step effectively brings the earnings for each year up to a current year value. This means, for example, that a UPE of $5,000 in 1966 (when the YMPE was $5,000) is worth the same as a UPE of $51,100 in 2013 (when the YMPE is $51,100) when calculating your CPP retirement pension.
Your Total Adjusted Pensionable Earnings (TAPE) is now calculated by simply adding together all of the APE calculations for your entire contributory period.
Step 3 – Determine your “dropout” periods
The two most common dropouts are the general dropout and the Child Rearing Provision (CRP).
If you are eligible for the CRP, you can drop out any period of time that your children were under the age of 7 and where your APE was less than your average APE. The CRP is done first and then the general dropout is applied.
The general dropout, for which everyone is eligible, drops out a percentage of the lowest remaining earnings in your contributory period. The general dropout percentage was 15% before 2012, has been 16% since 2012, and will be 17% starting in 2014.
Example 1: As mentioned in Step 1, for someone reaching age 65 in 2013, the contributory period would be 47 years or 564 months. If they never received CPP disability and weren’t eligible for the CRP, they would use the general dropout to remove the lowest 96 months of APE (564 x 17% = 95.88, rounded up to 96).
Example 2: If the same person from Example 1 was eligible for the CRP for two children born three years apart, that person could drop out up to 10 of those years (or 120 months) under the CRP, plus a further 76 months ((564  – 120) x 17% = 75.48, always rounded up to 76) under the general dropout.
Step 4 – Calculate your Average Monthly Pensionable Earnings (AMPE)
First, subtract all of the APEs that you identified in Step 3 as being dropped out, from the TAPE that you calculated in Step 2. For example, if you are dropping out 96 months, you would identify your 8 years of lowest earnings and subtract the APEs for those years from the TAPE. The result of this calculation is the TAPE (after dropout).
If you are dropping out less than a full year of APE, just pro-rate that amount. For example, if you are dropping out 76 months, you would drop out your lowest 6 full years of APE, and 4 months of the next lowest year. When dropping out the 4 months, you would drop out 4/12ths of the calculated APE for that year.
Next, subtract the number of months identified as dropout periods in Step 3 from your original number of contributory months (NCM) calculated in Step 1, to get your NCM (after dropout).
For example, 564 NCM – 96 months dropped out = 468 NCM (after dropout)
Finally, your AMPE is simple math using the formula:
AMPE = TAPE (after dropout) / NCM (after dropout)
Step 5 – Calculate your retirement for benefit calculation (RTR-FBC)
This is the easiest step. Just take 25% of the AMPE that you calculated in Step 4.
The result of this step is the amount that your monthly CPP retirement pension will be, if your pension is starting the month after you turn 65.
Step 6 – Apply any applicable actuarial age adjustment factor
If you are starting your CPP retirement pension earlier than age 65, decrease your RTR-FBC calculated in Step 5 by the appropriate age factor.
Related article:  How to Get Your CPP Early
If you are starting your CPP retirement pension later than age 65, increase your RTR-FBC calculated in Step 5 by the appropriate age factor (now always 0.7% per month).
Note: If all of the above is too confusing or complex, you can email me at, along with a copy of your SOC and any “scenarios” for which you want CPP retirement pension calculations. (For example, you might want to find out how much your CPP retirement pension will be if you start taking it at different ages, say 60, or 65, or 70.) I charge a small fee for each calculation that I do, but I also guarantee the accuracy of my calculations.

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