Why is my paycheque higher in November or December?

Your paycheque is likely higher in late fall because you have reached the annual CPP and/or EI contribution ceilings. How this works: CPP and EI premiums are capped at annual maximums. In 2025, the maximum CPP contribution is approximately $3,867 and the maximum EI premium is approximately $1,049. Once you have paid the maximum through the year, your employer stops deducting those amounts — and your take-home pay increases by $150–$300/month (depending on your income) for the last few pay periods of the year. Both restart on January 1 at the new year's rates. The months this happens depends on your income: higher-income earners hit the ceiling earlier (sometimes September–October); lower-income earners may not hit it until December or not at all.

Why did my paycheque suddenly decrease mid-year?

A mid-year paycheque decrease (with no change in salary) is caused by: (1) Benefits enrollment or change: if you enrolled in extended health, dental, disability, or life insurance through work — or changed your benefit selections — the new premium deductions start immediately and reduce take-home pay. (2) A TD1 form update: if you changed your TD1 claim amounts (e.g., stopped claiming a spousal credit or dependent credit), your withholding increases. (3) A garnishment or wage attachment started: a court order or CRA Requirement to Pay can direct your employer to withhold a portion of each paycheque. (4) Group RRSP or DPSP enrollment: if you joined an employer group savings plan, those contributions come off your paycheque. (5) Pension plan enrollment: if you are newly participating in an RPP, your required contribution reduces take-home pay.

Why is my paycheque higher than I expected when I got a raise?

When you receive a salary increase, your gross pay increases but your take-home increase is lower than the gross difference because: more income is taxed at your marginal rate (not your average rate); CPP and EI contributions may increase (if still below the annual ceiling); your net increase is the gross increase × (1 − effective marginal rate for that income). For example: a $5,000/year raise ($192/biweekly pay period) at a 33% combined federal/provincial marginal rate produces approximately $129 more after-tax per pay period, not $192. Your employer may also apply the new rate retroactively to earlier pay periods in the same year, which sometimes produces one larger-than-expected paycheque when the retroactive amount is paid out.

Why is there a retroactive adjustment on my paycheque?

A retroactive pay adjustment appears when a salary change (raise, promotion, or correction) is applied backward to earlier periods. Your employer calculates the difference between what you were paid and what you should have been paid, then issues the accumulated amount in one or more catch-up payments. Retroactive pay is taxed at the time it is paid — which means it is combined with your current regular pay in that period and taxed as a larger single amount. This can result in a higher rate of withholding than if the raise had been applied each period when it was earned. If this causes significant over-withholding, you will receive it back at tax time as a refund. You cannot avoid this by asking for a different treatment — Canadian payroll rules require tax withholding at the time of payment.

What does it mean if my paycheque shows a court attachment or garnishment?

A wage garnishment (Ontario: Garnishment of Wages; federally: Requirement to Pay) is a legal order directing your employer to withhold a portion of your wages and send it to a creditor or to CRA. Common types: (1) Court judgment garnishment: a creditor won a lawsuit and obtained a garnishment order. In Ontario, up to 20% of net wages can be garnished (more in other provinces). (2) CRA Requirement to Pay: CRA can issue this to your employer without a court order when you owe taxes. Your employer is legally required to comply immediately. (3) Family law support order: child/spousal support arrears can result in an administrative wage assignment through the Family Responsibility Office. The garnishment continues until the debt plus costs is fully paid unless you make alternate arrangements. Contact the creditor (or CRA at 1-888-863-8657) to arrange repayment and potentially lift the garnishment.

Why are CPP2 deductions showing on my paycheque?

Starting in 2024, Canada introduced CPP2 — a second tier of CPP contributions that applies to earnings between the first Year's Maximum Pensionable Earnings (YMPE) and the second Year's Additional Maximum Pensionable Earnings (Year's Additional Maximum Pensionable Earnings, YAMPE). For 2025: CPP1 applies to earnings between ~$3,500 and $71,300 (YMPE); CPP2 applies to earnings between $71,300 and $81,900 (YAMPE). The CPP2 rate is 4% of earnings between YMPE and YAMPE (employee share). If your income exceeds $71,300, your employer deducts the additional CPP2 premium on top of regular CPP. This started phasing in 2024 and is fully in effect by 2025. The contribution shows separately on your paycheque stub as "CPP2" or "QPP2 (Quebec)." These contributions go toward an enhanced future CPP benefit.

How can I get my paycheque back to what I expected?

Depending on the cause of the change: Higher-than-expected deductions → ask your payroll department for a detailed breakdown — they must provide one. Review recent TD1 form or benefit enrollment forms. CPP/EI ceiling reached → no action needed; this increase is normal and repeatable each year in the same timeframe. Erroneous deduction → contact payroll department immediately — errors in over-deducting will be corrected on the next payroll run or refunded. Garnishment → contact CRA (1-888-863-8657) or the creditor to make payment arrangements; once the debt is paid, the garnishment ends. Want to change withholding going forward → file a new TD1 (federal) and TD1 provincial. You can claim additional personal credits or request additional tax withheld under "Other" on Section D.

Why Is My Paycheque Different This Week? Every Reason Your Pay Changes

Your paycheque amount changes regularly throughout the year for reasons that are often predictable once you know what to look for.

Common causes at a glance

Cause	Paycheque impact	When it happens
CPP annual ceiling reached	Higher (CPP stops being deducted)	Sept–Dec depending on income
EI annual ceiling reached	Higher (EI stops being deducted)	Oct–Dec depending on income
CPP2 starts in January	Lower (additional deduction if income >~$71K)	January each year
New benefit enrollment (dental/health/LTD)	Lower (premium deductions start)	After open enrollment or start date
Raise effective date	Higher	Date raise takes effect
Retroactive raise pay	Higher (one-time larger amount)	When HR processes the retroactive period
TD1 change (fewer credits claimed)	Lower (more tax withheld)	After filing new TD1
Group RRSP / pension enrollment	Lower (savings deductions start)	After enrollment period
Garnishment or CRA Requirement to Pay	Lower (withheld for creditor/CRA)	Immediately upon legal order
Day count differs (bi-weekly timing)	Lower/higher	Some months have 3 paydays

TD1 and withholding adjustments

Your TD1 tells your employer what personal tax credits you are claiming. Common TD1 credit codes:

TD1 Line	Credit	2025 federal value
Basic personal amount	Everyone	$16,129
Age amount	65+	$8,790
Spouse/common-law partner	If applicable	Up to $16,129
Eligible dependant	Single parent with child	Up to $16,129
Disability amount	DTC certificate	$9,872
Caregiver amount	Supporting dependent	Varies

Filing a new TD1 at any time asks your employer to recalculate withholding. This takes effect on the next pay period after filing.

CPP and EI ceilings 2025

Deduction	2025 annual maximum	Employee rate	Months of deduction (at $70K salary)
CPP (employee)	$3,867.50	5.95% of insurable earnings	Jan–Oct approx.
CPP2 (employee)	up to ~$396	4.0% on earnings above $71,300	Aug–Oct (if >$71K)
EI premium	$1,049.12	1.66% of insurable earnings	Jan–Nov approx.

For a paycheque breakdown you do not understand

Ask payroll for a detailed pay stub breakdown — they are required to provide one
Identify each deduction line: gross pay, CPP, CPP2, EI, income tax, benefits, RRSP, garnishment
Check your TD1 form on file — payroll can tell you what form was filed
Review benefit enrollment confirmation if benefits changed recently