Reading your paycheque

A pay stub is a receipt for a transaction nobody walked you through. Your employer computes it, the money lands net, and most people read only the bottom figure — the one number on the page that explains nothing about how it got there. The rest of the document is where the answers are, and it is not complicated once you know that every line is doing one of three jobs.

Some lines are tax. Some are contributions to programs with an annual ceiling, which means they stop partway through the year for anyone earning above a certain amount. The rest are things you agreed to: a pension, a group savings plan, benefits premiums, dues. Sorting the lines into those three buckets tells you what your work actually costs you, when your pay is going to change without anyone announcing it, and whether you are quietly lending money to the government at zero percent.

The three kinds of line

The top block is earnings. Salary or hours worked, plus overtime, vacation pay, commissions, bonuses, and — the part that confuses people — taxable benefits. If your employer pays your group life insurance premium, that premium is added to your gross so tax can be calculated on it, then subtracted again further down because you never touched the cash. Gross on the stub can therefore be a few dollars higher than the salary in your offer letter without anything being wrong.

The second block is statutory deductions: income tax withheld, and contributions to the Canada Pension Plan (the Quebec Pension Plan, if you work there) and Employment Insurance. These are not optional and not negotiable. Some employers show federal and provincial tax as one line, some as two; the total is what matters.

The third block is everything else — pension or group RRSP contributions, health and dental premiums, union or professional dues, parking, payroll charitable giving. These are the lines you can actually change, and the ones worth auditing once a year.

Finally, and most usefully, there is the year-to-date column. It is the only part of the stub that shows the shape of your year rather than a snapshot of one fortnight, and it is what you check when a number looks wrong.

A pay stub, line by line

Take someone earning $78,000, paid semi-monthly — 24 pay periods, so $3,250.00 of gross per pay — contributing 5% to a group RRSP:

Figures are illustrative, chosen to show the arithmetic rather than to state current rates.

Two things are missing from that page. The employer pays its own CPP contribution matching yours, an EI premium set at a multiple of yours, and whatever the group RRSP match is worth — so the cost of employing you is meaningfully above $3,250 a pay. And the tax line is an estimate, not a settlement. Payroll is running a formula, not filing your return.

Why your net pay jumps partway through the year

CPP and EI are capped. Each is a percentage of your earnings up to an annual maximum, and once your year-to-date pensionable or insurable earnings cross that ceiling, the deduction stops for the rest of the year. At most salaries above the ceilings, EI stops first and CPP follows.

The stub then looks like this:

That is $220.00 more per pay. The tax line ticks up by $12.00 rather than staying flat, because part of your CPP contribution is itself deductible — lose the contribution and you lose a sliver of the deduction with it.

The ceilings also explain an unpleasant surprise when you change employers mid-year. Your new employer has no visibility into what the old one withheld, so it starts your CPP and EI counters at zero and deducts from the first dollar. You over-contribute for the balance of the year, get none of it back through payroll, and recover it as a credit when you file.

Pension, benefits and the match

If your employer runs a registered pension plan, your contribution comes off pre-tax and reduces the income the tax line is computed on. There is a second effect you will not see until the following spring: a pension adjustment appears on your T4, measuring the value of the benefit you earned that year, and reduces next year's RRSP room by roughly that amount. A strong workplace plan and a large personal RRSP contribution are competing for the same room, and the plan wins by default.

A group RRSP with an employer match works differently and deserves more attention than it usually gets. A 50% match on the first 5% of salary means the employer adds $81.25 for every $162.50 you contribute in our example — an immediate 50% return, before the money is invested in anything. There is no investment decision available to you that competes with it, which is why contributing at least to the top of the match is the one payroll choice with a defensible universal answer.

Benefits premiums are the line worth re-reading annually. Health and dental coverage is usually cost-shared and rarely revisited after onboarding; optional life and disability top-ups are often bought once at a life stage and carried for a decade past it.

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Whether your withholding is right

Payroll calculates tax by taking this pay, assuming that rate continues for the entire year, applying the credits you claimed on your TD1, and dividing the result across your pay periods. The estimate is good when those assumptions hold and drifts when they do not.

It under-withholds when you hold two jobs at once — each employer applies your full personal credits, so between them they apply them twice, and the shortfall arrives as a balance owing. It also under-withholds when you have investment or self-employment income that never passes through payroll at all.

It over-withholds when you have deductions your employer cannot see: RRSP contributions you make on your own, support payments, childcare, deductible employment expenses. The result is a refund, which feels like a windfall and is in fact a year-long loan you made at no interest. Where the amounts are large and recurring, you can apply to the Canada Revenue Agency for authorization to have less tax deducted at source, and payroll applies it once the letter arrives. Wanting more tax taken off is easier still — the TD1 has a line for an extra amount per pay, useful if you consistently owe.

Aim to land within a few hundred dollars either way, and check by comparing your year-to-date tax against a full-year estimate from the income tax calculator. If the two are far apart with several months to go, there is still time to correct it. Understanding why the tax on a bonus looks punitive and the tax on your salary does not is a question of marginal versus average rates — the bonus is withheld against the top of your range, not the middle.

What to do with the bottom line

Net pay is the number your budget is actually built on, so it is worth converting to a form you can plan against. If you are paid biweekly you receive 26 cheques, not 24, which means two months each year contain three — and treating those as bonus months rather than as the arithmetic of a 52-week calendar is the most common budgeting error in Canadian payroll. The salary converter turns any pay frequency into a comparable monthly figure.

From there, two habits do most of the work: setting your savings from net pay rather than from what is left at month end, covered in how much you should save each month, and checking each year that the gross on your stub has moved by more than prices have, which is the subject of whether your raise beat inflation. Both start with reading the stub instead of the balance.