T2125: How to Prepare Your Self-Employed Business Records

To prepare a T2125, you need more than a year's bank transactions. Explain what each amount represents: sales, tax collected, an unpaid invoice, an owner transfer, stock or equipment. Those details help your tax preparer understand the numbers instead of working from an unexplained total.

Form T2125, Statement of Business or Professional Activities, is used with the personal T1 return for relevant self-employed business or professional activities. This walkthrough organizes the records behind the form; it is not a substitute form or an instruction to copy numbers into unverified line numbers.

Identify the taxpayer and the activity

Start with legal structure. A sole proprietor's business income is not reported as though the business were a separate corporation. Incorporated businesses generally use the corporate return framework instead. A partnership interest requires the partner's applicable share and supporting partnership information, not an arbitrary split of the bank balance.

Confirm the legal name, business name, activity, address, reporting period, and ownership details needed for the current form. Distinct businesses or professional activities may require separate reporting. Do not combine unrelated activities just because they share a credit card.

Download the form and guide for the tax year from the Canada Revenue Agency (CRA) T2125 page. The form and instructions can change. Quebec residents also need to check provincial requirements. Completing the federal form does not meet every reporting requirement of Revenu Québec.

For this guide, imagine a fictional sole proprietor with a mobile bicycle-repair business. The example uses accrual accounting: recording income when earned and expenses when incurred, not just when money changes hands. Amounts are in Canadian dollars and exclude sales taxes where appropriate. These simplified figures do not decide anyone's actual tax treatment.

Reconcile income before sorting expenses

The fictional business records $96,000 of sales before tax and $2,000 of customer credits, giving $94,000 of net revenue. At year-end, $8,800 of those sales remain unpaid. Under the assumed accrual basis, that receivable is already included in revenue; adding it again would overstate income.

Compare the sales listing with credit notes, receivables, deposits, and the general ledger. A customer payment can settle an earlier invoice rather than create a new sale. A loan deposit or owner contribution is not automatically business revenue. Conversely, revenue may exist without a matching deposit yet.

• Retain the sales and credit-note detail behind the revenue total.
• Explain differences between deposits and reported sales.
• Separate GST/HST collected from sales revenue under the applicable accounting treatment.
• Identify advances, barter, non-cash items, or unusual receipts for review.

Do not switch between cash and accrual simply to make the bank total fit. Confirm the accounting method applicable to the activity and apply it consistently, with the necessary tax adjustments.

Support inventory and cost of goods sold

A service business can still hold parts for resale or installation. In this example, beginning parts inventory is $1,800, purchases are $12,600, and ending inventory is $2,400. The simplified cost-of-goods-sold calculation is $1,800 + $12,600 − $2,400 = $12,000.

That is not the same as deducting all purchases. Keep the year-end count, valuation support, purchase invoices, and explanations of damaged or obsolete stock. Confirm the applicable inventory treatment rather than inventing a write-off percentage for old parts.

Also distinguish goods held for sale from tools used repeatedly to earn income. A repair stand is not ending inventory merely because it sits in the same workshop as replacement chains. Freight, returns, and other cost adjustments should follow the appropriate records and guidance.

Show how your accounts match the tax categories

Illustrative records-to-review mapping for the fictional repair business

Record group	Example amount	Preparation treatment
Net sales detail	$94,000	Reconcile to income reporting
Inventory calculation	$12,000	Support cost of goods sold
Operating expenses	$12,600	Map to relevant expense categories after review
Owner withdrawals	$14,000	Not an expense merely because cash left
New durable diagnostic equipment	$3,400	Review as a capital purchase, not an automatic operating deduction

The $12,600 operating total consists of $7,200 workshop rent, $1,800 insurance, $1,200 advertising, and $2,400 other supported operating costs. Assume these amounts have already passed a basic business-purpose review, with personal portions and recoverable sales tax excluded where applicable. These are teaching assumptions, not a finding that every similarly named cost is deductible.

The result so far is $94,000 − $12,000 − $12,600 = $69,400. This is before capital cost allowance (CCA), any home-workspace claim and other tax adjustments. Make a list showing each bookkeeping account, any adjustment and the tax category it goes into. The reviewer can then follow the calculation without reclassifying the whole year.

Separate capital purchases and shared use

Capital cost allowance, or CCA, is not simply the equipment invoice entered as an annual expense. Gather the purchase date, cost, tax treatment, available-for-use details, business-use share, prior asset schedule, and disposal information. The appropriate class and claim require review; the $3,400 example does not calculate CCA.

Vehicle and home costs need their own supporting allocations. A business-use percentage without a log or an area-and-time calculation is not self-explanatory evidence. Check that the same cost has not already been deducted in another category.

Personal expenses, owner withdrawals, loan principal, and purchases for another activity should not disappear inside a miscellaneous account. Mark uncertain transactions as review items with the underlying documents and question attached. Guessing a category makes the package look finished while hiding the real issue.

Keep proposed changes separate from the original bookkeeping export. For each change, note the reason, supporting document and whether it is approved. If the preparer changes a business-use share or finds a cost that cannot be deducted, keep the explanation. Show how the new total connects to the books. This avoids two competing “final” versions and makes next year's starting figures easier to follow. Also note whether the change corrects the books or is needed only for tax reporting. They are not always the same entry.

Deliver a package another person can review

1. Reconcile bank and credit-card accounts and explain unresolved balances.
2. Include income, receivables, inventory, expense, and asset schedules.
3. Show personal-use exclusions and proposed tax adjustments separately.
4. Keep partnership information and prior-year continuity where relevant.
5. Assign unanswered questions and preserve the final approved version.

Bookwits can organize the checklist, files and review responsibilities. It does not generate a tax return or automatically decide deductions. Your accounting records and reviewed tax decisions still need to go through the appropriate tax preparation and filing process.