Is there a minimum amount of cash income I can earn before I have to report it?

No. There is no floor below which business income stops being reportable. The first dollar counts, whatever form it arrived in. The thresholds people are thinking of are different rules entirely. The 30,000 dollar figure is the small supplier threshold for GST/QST registration, which decides when you have to charge and remit sales tax, not whether you report the income. The 500 dollar figure is the level at which the repeated failure to report income penalty can apply, which is a penalty rule and not a reporting exemption.

What should I do about cash income I did not report in past years?

Correct it, and correct it before you are contacted. Prior returns can be amended, and both the Canada Revenue Agency and Revenu Quebec run voluntary disclosure programs for people who come forward on their own. The CRA grants a higher level of relief to someone correcting an error before being contacted than to someone correcting it afterward, so dealing with it sooner generally produces a better outcome. Talk to your accountant before filing anything, because how the correction is made matters as much as making it.

Do I have to report cash income in Canada?

The myth that will not die

On job sites, in salons, in kitchens, someone always repeats it: if the customer paid in cash, it does not count. It is one of the most persistent beliefs in Canadian small business, and it is simply not what the law says. The Canada Revenue Agency's own guide for the self-employed settles it in one sentence: you must report all your income in your income tax return.

The law does not care how you were paid

There is no rule anywhere in Canadian tax law that treats a cash payment differently from a card payment or an e-transfer. Business income is business income.

The CRA actually goes further and includes payments that are not money at all. Your sales include everything you received or will receive, whether money, services, or other goods that have bartering or monetary value. If a plumber fixes a dentist's sink in exchange for a cleaning, both sides have earned reportable income equal to the value of what they received.

So the list has no exceptions in it: cash, debit, credit, cheque, e-transfer, platform payouts, crypto, and barter. All of it is income.

What getting it wrong actually costs

Two separate penalties sit behind unreported income.

The first is the repeated failure to report income penalty. If you leave out $500 or more in a year, and you also left something out in any of the three previous years, the CRA charges the lesser of 10 percent of the amount you did not report, or 50 percent of the difference between the understated tax and any tax already withheld on it.

The second is heavier. Where an omission is made knowingly or in circumstances of gross negligence, the penalty is the greater of $100 or 50 percent of the understated tax. Both sit on top of the tax you owed in the first place, plus interest.

It is also easier to spot than it used to be

The quiet change of the last two years is data. Since January 1, 2024, digital platform operators have had to collect seller information and report it to the CRA, with the first returns covering the 2024 calendar year. If you earn through an app or a marketplace, the CRA generally receives those figures and you receive a copy of them too. Add deposit patterns and the standard indirect methods used to test whether declared income supports an observed lifestyle, and undeclared revenue is far more visible than the myth assumes.

Declaring is worth more than it costs

Here is the part that never makes it into the conversation. Declared income is the only income that works for you.

It is the only income a lender or mortgage broker can read. Two years of clean, filed statements is often the difference between a financing application that moves and one that stalls.

It also builds your pension. In Quebec in 2026, a self-employed worker contributes to the Québec Pension Plan on earnings above $3,500, at 12.6 percent, because you pay both the employee and the employer portion, up to maximum pensionable earnings of $74,600. A pension taken at 65 replaces a little over 25 percent of your average career earnings. Income you never declared contributes nothing to that figure, permanently.

What this means for you in 2026

If cash is part of how you get paid, the fix is not complicated, it is a habit: record every sale as it happens, whatever form it arrived in, and keep something behind it. If past years are not right, correcting them voluntarily attracts more relief than being found. That is the bookkeeping we do for you, so every dollar is captured, supported, and working in your favour instead of against you.