You worked your hours, did the math, and then checked your account. The number came up short.
Two deductions on your paycheque stub account for most of that gap: CPP and EI. Along with income tax withholding, they are why take-home pay is always less than the gross number you expected. Here is what they actually are, why they apply even to students and part-time workers, and what you eventually get back.
CPP: Your Mandatory Retirement Contribution
CPP stands for Canada Pension Plan. It is a government-run retirement program that nearly every employed Canadian pays into.
There is no opt-out. A percentage of your earnings flows to the program automatically, every pay period. Your employer contributes a matching amount on top of what you pay. The government pools those contributions, invests them through the CPP Investment Board, and eventually pays monthly benefits back to you when you reach retirement age.
In 2026, the CPP contribution rate for employees is 5.95% on earnings above $3,500. That $3,500 is called the basic exemption. The first $3,500 you earn from a given employer in a calendar year is exempt from CPP. After that threshold, 5.95% comes off each paycheque until you hit the annual maximum.
A concrete example: if you earn $5,500 at a summer job, CPP applies to $2,000 of it. Your total CPP contribution would be about $119 for the summer.
If your total earnings with one employer stay under $3,500 for the year, you pay nothing toward CPP that year. Many part-time student workers fall under the threshold entirely.
EI: The Safety Net for When Work Ends
EI stands for Employment Insurance. Think of it as mandatory insurance you pay premiums on while you are employed. If you lose your job involuntarily, you can make a claim and receive weekly payments while you search for new work.
The 2026 EI employee premium rate is 1.64% on every dollar of insurable earnings. Unlike CPP, there is no basic exemption. EI starts from the first dollar. Earn $300 in a pay period, and $4.92 goes toward EI premiums.
Your employer also pays into EI on your behalf, at a higher rate than you pay yourself.
To actually collect EI benefits after losing a job, you need a minimum number of insurable hours worked, generally between 420 and 700 hours depending on your region and the local unemployment rate. As a part-time student worker, you probably won't reach that threshold this year. But the hours and premiums still count toward the system that will be available to you as your working life grows.
EI also covers parental leave, sickness benefits, and a few other situations beyond job loss. Most people don't realize how broad the program actually is.
Why This Feels Frustrating
The CPP retirement benefit won't arrive for 40 or 50 years. Paying into it now, off a modest part-time paycheque, can feel completely pointless.
That reaction makes sense.
Here is the honest picture: CPP operates on an intergenerational model. The people collecting CPP payments today earned them because workers like you contributed for decades before them. When you reach retirement age, workers of the 2050s will be paying into the system that funds your monthly benefit. The money doesn't disappear. It moves through generations, pooled and invested along the way.
EI connects more directly to life in your twenties and thirties. If you lose a job you genuinely need, having paid into EI means you can make a claim. That's a real program real people depend on.
Neither feels urgent at 17. But you're building toward both right now.
The Tax Credit Most Teen Workers Miss
Here is something worth knowing before your first tax season: both CPP contributions and EI premiums generate a federal tax credit when you file your income tax return.
A tax credit reduces the amount of income tax you owe. The CPP and EI credits are non-refundable, meaning they can bring your tax bill down to zero but won't produce a refund on their own. Still, for a student with part-time income, they matter.
Combined with the basic personal amount (which shelters roughly the first $16,129 of income from federal tax in 2026), these credits often bring a teen worker's total federal tax owed close to zero or all the way to zero.
File your return regardless of whether you think you owe tax. If your employer withheld income tax from your paycheques during the year and you didn't actually owe that much, filing gets it back as a refund. Wealthsimple Tax is free for most students and takes less than 30 minutes. The CRA also has a free program called File My Return for eligible low-income filers.
There is no good reason to skip it.
What You Actually Get Back
From CPP: a monthly pension payment starting at age 60 (reduced), 65 (at the standard rate), or 70 (with a bonus for delaying). The more you contribute over your working life and the higher your earnings, the larger your monthly benefit. Starting to contribute in your teens gives you a longer contribution history, even if the annual amounts are small.
From EI: access to weekly income replacement if you lose your job involuntarily, once you have accumulated enough insured hours. The benefit pays a percentage of your previous insured earnings, up to a weekly maximum, for a set number of weeks determined by your situation.
You won't draw on either program for years, possibly decades. But the foundation is being laid now.
Your Next Move
Pull up your most recent paycheque stub or log into your employer's payroll app. Find the CPP and EI lines and note what came off.
Then set up a CRA My Account login at canada.ca if you don't have one yet. It takes about 10 minutes and is worth doing. When your T4 slip arrives in late February or early March, you will use it to file your tax return, apply the CPP and EI credits, and collect any refund owed to you.
Good stewardship starts with understanding the full picture. Your paycheque stub is part of that picture, and now you know how to read it.