--- title: "Separating Business and Personal Finances | EverStone" url: https://www.everstonecpa.com/blog/separating-business-and-personal-finances description: "Separating business and personal finances is the costliest habit an incorporated owner can skip. Why it changes at incorporation. See how to unwind it." type: guide updated: 2026-10-04 summary: "Commingling means running personal and business money through the same accounts. For an incorporated owner it distorts the shareholder loan account, creates income inclusions that were never intended, weakens the separation between the corporation and its owner, and makes every expense harder to support if the CRA asks." faq_count: 6 publisher: EverStone CPA Inc., a Chartered Professional Accountant firm registered with CPA British Columbia and CPA Alberta service_area: British Columbia, Alberta, Ontario and Manitoba language: en-CA contact: info@everstonecpa.com · https://www.everstonecpa.com/book-online --- [Home](https://www.everstonecpa.com/) [Blog](https://www.everstonecpa.com/blog) Separating business and personal finances in a Canadian corporation Corporate structure # Separating business and personal money*, and how to unwind the mess* By EverStone CPA · Reviewed August 2026 · 8 min read Commingling is rarely a decision. It is a card tapped at the wrong moment, a supplier paid personally because the business card was in the truck, a shortfall covered from savings. Each is minor; over a year, they become one of the most expensive habits an incorporated owner can keep, with consequences beyond bookkeeping. **Quick answer:** Commingling means running personal and business money through the same accounts. For an incorporated owner it distorts the shareholder loan account, creates income inclusions that were never intended, weakens the separation between the corporation and its owner, and makes every expense harder to support if the CRA asks. Unwinding a commingled year has an order — this one. ## Key takeaways - A corporation is a separate legal person — its money is not yours until it is properly paid out. - Personal spending from the company lands in the shareholder loan account, which has tax consequences. - Commingled records make expenses harder to support in a CRA review. - Unwinding it is a bookkeeping exercise plus a decision about how the balance gets cleared. ## Why this is different once you incorporate A sole proprietor who mixes accounts has a bookkeeping problem. An incorporated owner has a legal and tax one: the corporation is a separate person, and its money is not yours. Every withdrawal must be salary, a dividend, a repayment of money you lent, or a loan to you. Left uncharacterized, it defaults to the shareholder loan account. That account is not neutral. CPAs and CRA reviewers look at it early, and it decides whether amounts land in your personal income, whether a benefit is assessed on company funds, and how much you can later withdraw tax-efficiently. See the guide to [shareholder loans and taking money out of a corporation](https://www.everstonecpa.com/blog/shareholder-loans-canada-taking-money-out-of-corporation). **Want these claims documented properly?** Our monthly bookkeeping, from $325 a month, keeps every deduction backed by a receipt and a reconciled account before the CRA asks. See [our bookkeeping](https://www.everstonecpa.com/accounting-services), or [get a bookkeeping quote](https://www.everstonecpa.com/book-online?service=cfo#enquiry-form). [Get My Fixed Quote](https://www.everstonecpa.com/book-online?service=cfo#enquiry-form) ## What commingling actually costs **Unintended income inclusions.** Personal spending from the company account builds up as an amount you owe the company. Left long enough, rules can pull it into your personal income, purely because of how it was recorded. **Lost deductions.** Business expenses paid personally are frequently never claimed, because nothing in the company records shows they happened. The deduction was real; the record was not. **Weakened separation.** Limited liability rests on the corporation being genuinely distinct from its owner. Consistently treating the company account as a personal one undermines that distinction, which is the one benefit of incorporating that you cannot buy back later. **Harder reviews.** The CRA works from source documents. When every statement mixes groceries with materials, supporting a claimed expense means explaining a pattern rather than pointing at a line, and reviews that would have been routine become protracted. Not sure how this applies to you? Every corporation’s situation is different. Send an enquiry to a CPA and get a straight answer for your own books. [Send an Enquiry →](https://www.everstonecpa.com/book-online?service=cfo#enquiry-form) [Bookkeeping & year-end](https://www.everstonecpa.com/accounting-services) ## The clean structure for separating the two sets of finances The fix takes an afternoon. The corporation has its own chequing account and credit card, opened with the corporate documents and business number. All revenue goes in there; all business costs go out from there. Money reaches you only deliberately, as salary through payroll or a documented dividend, recorded as what it is. The guide to [opening a business bank account](https://www.everstonecpa.com/blog/opening-a-business-bank-account-canada) covers what the bank will ask for. It works both ways. Paying a supplier from your personal account creates an amount the company owes you, which is fine when recorded and awkward when not. ## Unwinding a commingled year The work is methodical rather than difficult, and it has an order. - **Stop the flow first.** Open the proper accounts, move the recurring charges, and draw a line. Unwinding a year while still adding to it never finishes. - **Identify every personal transaction in the company accounts.** Go statement by statement rather than by memory. Each one is either a business expense that was miscoded, or a personal amount that belongs in the shareholder loan account. - **Identify every business transaction in the personal accounts.** This is the half that gets skipped, and it is the half that recovers deductions. Receipts still apply: the expense has to be supported the same way any other expense is. - **Post both sides to the shareholder loan account.** Personal spending increases what you owe the company; business costs you paid personally reduce it. What emerges is a single balance that is either owed to you or owed by you. - **Decide how the balance is cleared.** If the company owes you, repayment is straightforward and not taxable. If you owe the company, the options are repayment, a dividend, or salary, and which one is right depends on your marginal rate, the corporation’s position and the timing. That is a planning conversation, not a bookkeeping one, and it is worth having before the fiscal year closes rather than after. ## Grey areas worth getting right Some expenses are genuinely mixed, with their own rules. A shared vehicle uses a [mileage log and a reasonable allowance or a taxable benefit](https://www.everstonecpa.com/blog/vehicle-mileage-deductions-canada-business). A home workspace uses the [home office rules for a corporation](https://www.everstonecpa.com/blog/home-office-deduction-corporation-canada). A phone is apportioned. The answer is to measure and document the business portion, not pay it all from the company and hope. ## The bottom line Separation is cheap to keep and expensive to restore: two accounts, one card, and no personal transactions through the company. That removes a whole category of year-end work and CRA risk. If last year is tangled, unwind it before the fiscal year closes, while you can still choose how to clear the balance. Sources - [Canada Revenue Agency — Type of corporation](https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/corporations/type-corporation.html) - [Canada Revenue Agency — Keeping records](https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/keeping-records.html) - [Canada Revenue Agency — Business expenses](https://www.canada.ca/en/revenue-agency/services/tax/businesses/topics/sole-proprietorships-partnerships/business-expenses.html) This article is general information for Canadian business owners and is current as of July 2026. It is not tax, legal or accounting advice, and it does not create a client relationship. Tax rules change and your situation is unique, so please [speak with a CPA](https://www.everstonecpa.com/book-online?service=cfo#enquiry-form) before acting on anything here. About this article **EverStone CPA** Prepared and reviewed by a CPA at EverStone CPA, serving businesses in BC, Alberta, Ontario and Manitoba. [About the firm →](https://www.everstonecpa.com/about) · [Send an enquiry →](https://www.everstonecpa.com/book-online?service=cfo#enquiry-form) ### Keep reading [Shareholder loans explained →](https://www.everstonecpa.com/blog/shareholder-loans-canada-taking-money-out-of-corporation) [Opening a business bank account →](https://www.everstonecpa.com/blog/opening-a-business-bank-account-canada) [Reimbursing yourself properly →](https://www.everstonecpa.com/blog/petty-cash-and-owner-reimbursements-canada) [Track money moving between you and the company →](https://www.everstonecpa.com/shareholder-loan-tracker) Common questions ## Frequently asked questions **What does commingling mean?** Running personal and business money through the same accounts: groceries on the company card, a supplier paid personally, revenue deposited personally. It is usually accidental and builds fast. **Why is commingling worse for a corporation than a sole proprietorship?** A corporation is a separate legal person. Mixing accounts creates amounts that must be treated as salary, dividends or a shareholder loan, each taxed differently. Ongoing commingling also erodes the separation limited liability depends on. **What is the shareholder loan account?** The account tracking money between you and your corporation outside salary and dividends. Personal spending from company funds increases what you owe; business costs you paid personally reduce it. Its balance and age decide whether an amount is included in your personal income. **Can I still claim a business expense I paid from my personal account?** Generally yes, if it is a genuine business expense with documentation. It is recorded as owed to you and reduces your shareholder loan balance. The real risk is that these expenses are never captured, because nothing in the company records shows them. **How do I fix a year of mixed accounts?** Open proper accounts and move recurring charges. Then review both company and personal statements, post every misplaced transaction to the shareholder loan account, and decide with a CPA how to clear the balance before year-end. **What about a vehicle or home office used for both?** Those are mixed-use expenses, not commingling, with their own rules. A vehicle uses a mileage log with a reasonable allowance or taxable benefit; a home workspace uses the corporate home office rules. Measure and document the business portion rather than paying the whole cost from the company. ## Personal and business money tangled up? Send an enquiry to a CPA and get a clear plan for separating the accounts and clearing the shareholder loan. [Get My Fixed Quote](https://www.everstonecpa.com/book-online?service=cfo#enquiry-form)[Book a Paid Advice Call](https://www.everstonecpa.com/advice-call) ## Have a question about this? Ask it free through [the quick-question form](https://www.everstonecpa.com/quick-question) and a CPA replies by email within one business day. For something that needs a proper look, a one-off **Advice Call** is a paid 45-minute session with a Chartered Professional Accountant: $225 plus GST, booked by email with a secure payment link. It is credited against your first invoice if you become a client within 60 days. Looking for an accountant to take this on rather than an answer? [Send an enquiry](https://www.everstonecpa.com/book-online?service=cfo#enquiry-form). [Ask a Free Question](https://www.everstonecpa.com/quick-question) [Book a Paid Advice Call](https://www.everstonecpa.com/advice-call) Email info@everstonecpa.com ★★★★★ “…We switched to him last year for both our personal and small-business taxes — responsive, knowledgeable and quick.” Heather Powers · Google review **Run your own numbers with the free calculators:** [see which pay mix wins](https://www.everstonecpa.com/salary-vs-dividends-calculator) · [check when your T2 is due](https://www.everstonecpa.com/t2-deadline-calculator) · [Tax instalment calculator](https://www.everstonecpa.com/tax-instalment-calculator) [← Selling a rental property: recapture, capital gain and the order the numbers work in](https://www.everstonecpa.com/blog/selling-a-rental-property-canada-tax) [Shareholder loans: taking money out of your corp →](https://www.everstonecpa.com/blog/shareholder-loans-canada-taking-money-out-of-corporation) --- Source: https://www.everstonecpa.com/blog/separating-business-and-personal-finances Prices: https://www.everstonecpa.com/pricing · Contact: info@everstonecpa.com · https://www.everstonecpa.com/book-online