Preparing Your Books for Accountant or CRA Review in Canada (2026 Guide)
What records to keep, how to close your books, how to support GST/HST claims, which owner-manager items draw attention, how to respond if the CRA writes to you, and how risk management reduces both financial risk and business risk.
1. Why Review-Ready Books Matter
Most business owners think about their books twice a year: at tax time, and when a letter arrives. By then, a missing receipt, an unreconciled account or an unexplained deposit has become an expensive problem. Hours of an accountant's time go to rebuilding what could have been recorded in minutes, and in a review the cost can include denied deductions, reassessed tax, interest and penalties.
The good news is that being ready for an accountant and being ready for the CRA are largely the same job. Both look for the same thing: reported figures that agree with documents you can produce. If your books are reconciled, your support is organized and unusual items are explained, you can handle either with confidence.
This guide shows how to get there. Custom CPA helps through our core accounting and tax services, with specialized services for complex files and CFO advisory services when you want ongoing oversight of your numbers.
Want Your Books Checked Before Your Accountant or the CRA Does?
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2. Accountant Review vs. CRA Review
| Aspect | Accountant | CRA |
|---|---|---|
| Goal | Prepare statements and returns; advise | Check that returns are accurate and complete |
| Tone | Collaborative | Verification; can lead to reassessment |
| Questions asked | "What is this and how should we record it?" | "Show me the support for this figure." |
| Timing | Agreed with you | Deadlines set in a letter |
| Best preparation | Reconciled books and a list of open questions | Indexed supporting documents and consistent records |
3. The Types of CRA Reviews
| Type | What it is | What it usually involves |
|---|---|---|
| Processing review or matching letter | A question about one item, such as a deduction, credit or slip mismatch | Sending receipts or a short explanation |
| Desk audit | A correspondence review, often covering several items on a return | Responding by mail or online with supporting documents |
| Field audit | An in-depth examination of books and records, sometimes on site | Several years, related entities, interviews and detailed testing |
| Net-worth or indirect audit | Used when records are considered inadequate | Income estimated from changes in assets and lifestyle |
4. Retention and Time Limits
For records, the general rule is six years from the end of the last tax year they relate to, so records for a December 31, 2025 year-end would generally be kept through December 31, 2031. Electronic records are acceptable if they are clear, legible and complete, and the CRA generally expects records to be kept in Canada, which matters if you use cloud accounting. Property and share records may need to be kept longer.
Separately, the CRA can generally reassess a return only within a limited period after the original notice of assessment, commonly three years for individuals and Canadian-controlled private corporations, with longer periods and exceptions in some cases such as misrepresentation. Confirm the periods that apply to you with a qualified tax professional, and do not discard records just because a reassessment period has passed.
5. The Records Checklist
| Area | Keep and be ready to show |
|---|---|
| Returns | Filed T1, T2, T3 and GST/HST returns, notices of assessment |
| Accounting records | General ledger, trial balance, financial statements, bank reconciliations |
| Banking | Statements for every business account and any personal account used for business |
| Revenue | Invoices, sales reports, point-of-sale data, deposit slips tied to sales |
| Expenses | Receipts and invoices that show vendor, date, amount, tax and what was purchased |
| Payroll | Registers, source deduction remittances, T4s, records of employee status |
| Vehicles and home office | Mileage logs, home-office calculations and supporting bills |
| Loans and related parties | Loan agreements, shareholder loan ledger, related-party contracts |
| GST/HST | Input tax credit support, registration numbers of suppliers, return workpapers |
| Contracts | Customer, supplier, lease and professional-service agreements |
6. A 30-Day Cleanup Plan
Illustrative Four-Week Plan
Timing varies with the age and condition of your records. If you are years behind, expect a longer catch-up.
- Reconcile first: every bank and credit card account to the statement balance.
- Clear the suspense account: nothing should sit in "uncategorized" at year-end.
- Tie sales tax to the ledger: the GST/HST returns should agree with the income statement.
- Index your support: name files by date, vendor and amount, or attach them to the transaction in your software.
7. Supporting GST/HST Input Tax Credits
Input tax credits are a frequent focus because a credit that lacks proper support is simply denied. The documents must contain the information required by the regulations, and that information can come from more than one document, for example a contract plus invoices. Common issues include:
- Supplier registration numbers: where tax is charged and the total is $30 or more, the supplier must show its GST/HST registration number. An incorrect number can lead to the credit being denied, so check suppliers through the CRA's registry and keep a record that you did.
- Recipient name: an invoice issued to a related company or to the owner personally, instead of the company that paid and claims the credit, can lead to denial. Correct the name at purchase time.
- Missing documents: a reviewer may simply deny a credit that lacks support rather than chase you for it, so complete documents should be on file from the start.
- Shared purchases: where one supply covers several entities, keep the written allocation.
Complete support also helps when a lender or buyer asks for compiled statements; see what Canadian business owners need to know about compilations for how statements and supporting records work together.
8. Owner-Manager Items
For owner-managed companies, the boundary between the business and the owner is a leading source of questions. Clean treatment of these items is one of the best ways to reduce review risk.
| Item | What to keep or do |
|---|---|
| Shareholder loans | A running ledger of amounts in and out; know the repayment timing rules before year-end |
| Personal expenses paid by the company | Record them as owner transactions, not business costs |
| Vehicle expenses | A trip log supporting the business-use percentage |
| Home office | A measured calculation and the bills behind it |
| Salary and dividends | A documented approach consistent with your tax planning |
| Related-party transactions | Written agreements and market-based pricing |
If a shareholder loan or personal-use item is unclear, ask your accountant how it should be recorded before year-end rather than after.
Not Sure Your Owner-Manager Items Are Recorded Correctly?
A short review with Custom CPA can catch problems before they become questions.
9. What Draws CRA Attention
Published commentary from tax professionals lists a consistent set of triggers. Random selection can also occur, so the aim is to be ready rather than to avoid selection entirely.
- Cash-heavy industries and income that looks low compared with peers.
- Expenses or ratios that stand out from others in the same industry.
- Repeated business losses, especially when they offset other income.
- Large adjustment or refund requests.
- Shareholder loans that are not repaid on time, or repaid just before a deadline.
- Vehicle and home-office claims without logs or calculations.
- GST/HST return figures that do not match the corporate return.
- Spending or assets that do not fit the declared income.
- Audits of related companies, shareholders or suppliers.
10. Handing Your Books to Your Accountant
A good handover saves hours and reduces errors. Send a complete package with a short note, not a bag of receipts.
- Reconciled bank and credit card accounts to the period end.
- Receivable and payable listings and inventory counts, if you hold stock.
- Payroll and sales tax records and the filings made during the year.
- Loan, lease and shareholder schedules.
- A list of unusual transactions, with explanations and supporting documents.
- A list of your own questions, such as planned purchases or changes in the business.
If you need compiled financial statements for a lender or investor, see our guide to preparing for a compilation engagement for the documents and steps involved.
11. If a CRA Letter Arrives
Typical Sequence and Time Limits (Illustrative)
Bar lengths are illustrative. Specific deadlines depend on the notice you receive; always follow the dates in your own correspondence and confirm them with a professional.
- Read it carefully: note the years, issues, entities, deadline and the auditor's contact details.
- Respond on time: or request a written extension before the deadline.
- Answer what is asked: provide what is requested, no more and no less, and do not guess. It is fine to say you will confirm.
- Send copies: keep originals, provide an indexed package and use one point of contact.
- Keep a log: record every request, document and conversation, and confirm key points in writing.
- Never alter records: do not backdate, change or fabricate anything. Reconstructing missing records is acceptable; falsifying them is not.
- Get help early: especially for multi-year reviews, related companies or potential penalties.
12. Risk Management: Financial Risk and Business Risk
Treat review readiness as a risk management exercise. Financial risk is what a review could cost: denied deductions, reassessed tax, interest and penalties. Business risk is what it could disrupt: management time, lender and investor confidence, and the ability to sell or borrow.
| Risk | Type | Control |
|---|---|---|
| Expenses disallowed for lack of support | Financial risk | Capture receipts at purchase; attach to transactions |
| Denied GST/HST input tax credits | Financial risk | Check supplier numbers and invoice names; keep complete documents |
| Income estimated by indirect methods | Financial risk | Complete, reconciled records that trace deposits to sales |
| Shareholder loan or personal expense issues | Financial risk | Owner ledger; repayment calendar; separate personal spending |
| Missed response deadlines | Business risk | Named owner for CRA correspondence; calendar of dates |
| Lost records or one person who knows the books | Business risk | Cloud backups, documented procedures, cross-training |
| Lender or buyer questions records | Business risk | Monthly closes; compiled statements when needed |
| Inconsistent records between returns | Business risk | Annual tie-out of GST/HST, payroll and income tax figures |
13. Industry and Use-Case Notes
- Retail: daily sales reconciliation, inventory counts and cash handling are the focus; see fractional CFO services for Canadian retail.
- Agriculture: inventory of grain and livestock, program payments and mixed personal and farm spending need careful records; see fractional CFO for agriculture operations.
- Raising money: lenders and investors ask for statements and support, as in our guide on how an entrepreneur secures investment with a business plan.
- Immigration or program files: where financial records must be verified, clean books and a clear paper trail matter; see can a business plan help with immigration.
- Planning: our business planning and financial modeling work depends on the same reliable records.
14. Readiness Checklist
- All bank, credit card and loan accounts reconciled to the period end.
- No transactions left uncategorized; unusual items explained.
- Receipts and invoices attached or indexed, with vendor, date, amount and tax visible.
- GST/HST returns tie to the ledger; supplier registration numbers checked.
- Payroll records and remittances complete.
- Shareholder loan ledger up to date; personal spending separated.
- Vehicle and home-office logs and calculations on file.
- Six years of records retained, with backups kept in Canada.
- A named person responsible for CRA letters and deadlines.
15. Frequently Asked Questions
How long should I keep business records for the CRA?
The general rule is six years from the end of the last tax year they relate to. For a corporation the tax year is its fiscal year; for a sole proprietor it is the calendar year. Late-filed returns or unfiled GST/HST returns can change the clock, and property and share records may need to be kept longer. Electronic records are acceptable if clear, legible and complete.
What does the CRA look for when it reviews a small business?
Reviews commonly focus on whether income is fully reported, expenses are supported and business-related, GST/HST claims are documented, and owner-manager items such as shareholder loans, vehicle use and home-office claims are accurate. Figures out of line with the industry, repeated losses, large refund claims, return mismatches and spending that does not fit declared income can draw attention.
How do I get my books ready for my accountant?
Reconcile every bank and credit card account to the period end, clear or explain uncategorized transactions, prepare receivable and payable listings, count inventory, gather payroll and sales tax records, document loans and shareholder transactions, and organize support. Include a short list of questions and unusual items. Closing your books monthly makes year-end much faster.
What should I do if I receive a CRA audit letter?
Read it carefully and note the years, issues, deadline and contact. Respond on time or request a written extension before the deadline. Provide what is requested and no more, send copies in an indexed package, keep a log and never alter or backdate records. Involve your accountant or a tax lawyer early, especially for multi-year or related-company reviews.
Can I reconstruct missing records for a CRA review?
Reconstructing missing records, such as by requesting duplicate statements from banks or invoice copies from suppliers and customers, is generally acceptable and often necessary. Altering, backdating or fabricating records is not. Be open about what was reconstructed and how, and have your accountant guide the process.
16. Final Thoughts
Preparing for a review is not a special project; it is the result of ordinary habits: reconcile every month, keep support with the transaction, treat owner items cleanly and tie your tax filings to the ledger. With those habits, a handover to your accountant takes hours instead of weeks, and a CRA letter becomes a task rather than a crisis. Build in risk management that separates financial risk from business risk, and your books will protect you instead of exposing you.
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