Updated Checked by the Tax-Services.ca editorial team How we check
Separate personal and business finances by opening a bank account and a card used only for the business, and pay yourself from one to the other on a set schedule. Canada doesn’t force this on a sole proprietor. The CRA’s business records page doesn’t say a separate account is required. But the CRA does require records that show the date, amount and source of every dollar of income, and mixed accounts make those records a chore to build.
Why separate business and personal money at all?
Because the alternative costs you money. On a mixed account, a $47 grocery run sits next to a $47 supplier bill, and a year later you can’t tell which is which. Every expense you can’t prove is an expense you can’t claim.
Here is a real comparison from our self-employed tax calculator, using Ontario. On $60,000 of net business income, income tax is $7,879.42 and CPP for both halves is $6,723.50, so you keep $45,397.08. Suppose $6,000 of genuine costs got lost in the mess, and your net income is taxed as $66,000. Tax and CPP rise to $16,756.47, so you keep $49,243.53 out of that bigger number. The difference in what you pay is $2,153.55, and you paid the $6,000 of costs anyway, so your real take-home is $43,243.53, about $2,150 less than it should be.
That’s the price of a messy account, and it comes back every single year that the habit continues.
What records does the CRA expect?
The CRA says to keep records for a minimum of six years from the end of the last tax year they relate to. It also says to keep separate records for each business you run.
| Record | What it should show |
|---|---|
| Income | Date, amount and source, backed by invoices, receipts or deposit slips |
| Expenses | Purchase date, supplier name and address, what you bought and the amount |
| GST/HST purchases over $100 | The supplier’s business number, if they are registered |
| Banking | Bank statements, cancelled cheques and duplicate deposit slips |
Don’t send these in with your return. Just keep them, since the CRA can ask later.
How do you set up a clean split?
Start with the plainest steps. Open a chequing account in the business’s name, or at least one you use for nothing else. Get a card for business purchases and never use it at the grocery store.
Then decide how you get paid, and stick to it. Many owners transfer a fixed amount on the same day every month, the way a paycheque would land. A corporation is a separate taxpayer that files its own T2 return, so the split matters even more there. We didn’t verify on an official page how owners should pay themselves from a corporation, so check that before you set anything up.
What about the slip-ups? They’ll happen. When you pay a business cost from a personal account, move money across and label the transfer the same day. When you pay something personal from the business account, log it as a draw. Fixing it in June for the whole spring is the hard way.
What happens when sales pass the GST/HST line?
Most small businesses must register for GST/HST once they pass $30,000 of taxable sales over four consecutive calendar quarters. If a single quarter takes you over, tax applies from the sale that crossed the line. The CRA’s general information for GST/HST registrants says your registration is effective the day of that sale, and that you must register within 29 days of it.
After that, the tax you collect isn’t yours. It sits in your business account until you remit it. Take Ontario: a $5,000 job carries $650 of HST, and the GST/HST calculator shows the $5,650 total. A mixed account makes it far too easy to spend that $650 on groceries.
Taxes that arrive on a schedule
Income tax on self-employment doesn’t get withheld for you. Use the self-employed tax calculator to see the size of the yearly bill, then put a share of every deposit aside. The tax instalments calculator shows the quarterly payments if you owe enough for the CRA to ask for them, and its default example uses a $3,000 threshold.
The calculators have limits. The self-employed tool doesn’t include GST/HST, EI or the business expenses themselves. It also lowers income tax with deductions but leaves CPP alone, so treat its output as a good estimate.
Common mistakes
Picture Dana, a freelance designer in Halifax. She pays for software on her personal card “just this once”, then does it again every month, and by December she has twelve charges to dig out of a statement full of groceries and gas. A dedicated card would have taken that evening down to ten minutes.
Using the business account as a wallet is the first. Paying the rent, the cellphone and the streaming bill from one account is the second. And the third is waiting until tax time to sort it all out. By then receipts have faded, and memory is worse than paper.
What if your home is your office? The CRA has separate rules for business use of home. We didn’t cover them here, so read the CRA page before you claim a share of your rent or utilities.
What if your accounts are already mixed up?
You don’t have to untangle three years in one weekend. Open the new account today and run clean from the first of next month. Then spend an evening going through last month’s statement, marking each line as business, personal or unsure. The unsure pile is usually short, and it’s the one worth asking an accountant about. If you’ve been claiming expenses you can’t back up, say so to your accountant now rather than wait for a letter.
Sources, and how we checked them
Record rules come from the CRA business records page, and the GST/HST threshold from the CRA’s registrant guide linked above. The example figures come from our own calculators using 2026 Ontario and federal rates. We checked the official pages in October 2026. We’re an independent site, and no government body is behind it.
Frequently asked questions
Do I need a separate business bank account in Canada?
The CRA business records page doesn't say one is required. It does require records showing the date, amount and source of income, and a separate account makes those easy.
How long do I keep business records?
Generally at least six years from the end of the last tax year they relate to.
When must I register for GST/HST?
Most businesses register once taxable sales pass $30,000 over four consecutive calendar quarters.
What if I paid a business cost from a personal card?
Keep the receipt, move the money from the business account to your own, and label the transfer that day.
Do I send receipts with my return?
No. The CRA says keep them in case it asks to see them later.
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