Gig work on top of a full-time job: how the taxes work

Your employer withholds tax on your paycheque, but not on your Uber or DoorDash earnings. How the two combine, why side income is taxed at your top rate, and an easy way to avoid a big April bill.

A lot of drivers have a regular job and do rideshare or delivery on evenings and weekends. Your paycheque has tax taken off automatically. Your gig income doesn't. That gap is where the April surprise comes from.

Your income is combined

On your return, your employment income (from your T4) and your net gig profit (from your T2125) are added together. There's one set of tax brackets for all of it.

Your job already uses up your basic personal amount and the lower brackets. So every dollar of gig profit is taxed at your top rate, not the lowest one.

CPP works a little differently

Your employer takes CPP off your paycheque. On your gig profit, you pay both halves, 11.9%. The $3,500 basic exemption is applied only once, and it's usually already used by your job. The combined total is capped at the yearly maximum, so if your salary is high enough, you'll pay little or no extra CPP on gig income.

An example

Ontario, 2026: a $45,000 job plus $10,000 of gig profit
Extra income tax on the $10,000 about $1,830
Self-employed CPP (11.9% of $10,000) $1,190
Total owing on the gig income about $3,020
Share of gig profit about 30%

None of this was withheld, so it all comes due at once, on April 30.

Option 1: Ask your employer to withhold more

The easiest fix. On the TD1 form you give your employer, there's a section for additional tax to be deducted from each pay. If you expect to owe about $3,000 on gig income and you're paid every two weeks, asking for about $115 extra per pay spreads it out over the year. Your employer sends it to the CRA for you.

Option 2: Save it yourself

Move a percentage of each gig payout to a savings account and pay the CRA at tax time. For the driver above, about 30% of profit.

Option 3: Instalments

If you owe more than $3,000 in two years out of three, the CRA will send instalment reminders anyway. Extra withholding at your job counts toward reducing what you owe, which can keep you under the threshold.

GST/HST still applies

Having a job doesn't change the GST/HST rules. Rideshare drivers need a GST/HST number from their first fare. Delivery drivers can wait until they pass $30,000.

How MyGigLedger helps

MyGigLedger shows how much of each payout to put away. For drivers with a job, that number tells you how much extra withholding to ask for on your TD1.

This article is general information based on CRA guidance as of September 29, 2026. It isn't tax advice. Rules change, and your situation may differ, so check with the CRA or a tax professional before you file.

Keep reading

Related articles

Know what you owe before April does

Start with your last payout. It takes about a minute, and the Free plan never expires.