Corporate CRA Notice of Assessment

CRA Notice of Assessment for a Corporation: Check These Items First

The Notice of Assessment (NOA) lands in My Business Account or the mail. The balance may not match what you expected. Before you pay, ignore it, or argue from memory, line it up against the return you filed, the working papers, and the corporation’s CRA account history.

General education for Canadian owner-managers. Not legal, tax, or accounting advice. Your notice, your facts, and your deadlines control what happens next.

What an NOA is doing on a corporate matter

For a corporation, a Notice of Assessment (or reassessment) is CRA’s statement of how it assessed a return for a tax year — often a T2, sometimes another account on the business number. It shows assessed amounts, credits applied, a balance, and usually a date that starts a clock for disagreeing with the assessment. Compare it to what left your office — don’t treat it as a friendly summary.

Open three things side by side

Do this before you call anyone or write CRA.

1. The NOA itself. Full PDF or paper copy. Every page, including schedules if attached.
2. The filed return and working papers for that year. The T2 (or other return named on the notice), schedules that went with it, and the binder your preparer used.
3. The corporation’s CRA account history for that account. In My Business Account, open the program account and check returns, payments, transfers, and prior notices for the same year.

NOA plus a vague “we filed in June” is not enough. Pull the filed package before you compare.

Check these items first

1. Business number, tax year, and account

Confirm the notice belongs to this corporation and this year. Wrong year, wrong BN, or a personal account mixed into a corporate folder wastes the next hour. Write the tax year and program account on the folder tab.

2. Assessed income and tax vs what you reported

Line up taxable income, tax, and major credits on the NOA against the filed return. Circle every difference. A small gap can be noise. A five-figure gap is a file issue.

Common scenes: CCA that didn’t match the schedule, a loss carryforward CRA didn’t apply as shown, or related-company income treated differently than the working papers.

3. Payments, instalments, and credits applied

The balance is often where the shock hits. Trace instalments against bank records, transfers from another account or year, and prior payments the NOA did or did not apply. Prefer bank proof over a sticky note that says “paid in March.”

4. Penalties and interest

If the NOA includes late-filing or other amounts, note the basis CRA states. Separate “we disagree with the tax” from “we disagree with the add-ons.” Different facts support each conversation.

5. The date that starts the disagreement clock

Find the notice date and any language about objecting or responding within a set period. Put that date in the corporation’s real calendar. Missing the window changes the options.

Related reading: what to do when a CRA letter arrives.

Build a one-page mismatch sheet

Columns that work: item; on the matterd return / working papers; on the NOA; on the CRA account history; evidence on hand; status (matches / mismatch / unknown).

Fill it in one sitting if you can. Unknown is honest. Inventing a reconciling number is not.

When the numbers match

If the NOA lines up with the return and the account history, pay any balance by the due date shown, or confirm a refund is in process. File the NOA with the year-end package. Keep the mismatch sheet — it proves you checked. Matching numbers mean the assessment reflects what was filed; they do not mean you like the tax result.

When something doesn’t match

Don’t phone CRA with half the story. Finish the mismatch sheet. Then sort the gap:

• Administrative — payment not applied, transfer pending, or an obvious keying difference you can document with bank proof and account screenshots.
• Technical — CRA changed income, denied a claim, or applied law differently than the return. That needs working papers and a clear statement of what you reported.
• Multi-year or multi-entity — related companies, carrybacks/carryforwards, or notices that touch more than one year. Treat those as a structured file, not a quick call.

Preserve what exists. Don’t rewrite ledgers after the NOA arrives to “make it work.” Note gaps. Source documents first.

Tight deadlines and multi-year issues

Consider a structured review when the disagreement window is short and the mismatch sheet isn’t finished; more than one year is open; related parties share the fact pattern; working papers are thin; or you’re in objection territory, not a simple payment allocation. Help means process quality — facts, labelled exhibits, consistent explanations — not a promised result.

For objection framing and representation: notice of objection first steps and CRA representation.

What usually makes an NOA week worse

• Paying a large balance “to make it go away” before you know whether the assessment matches the return.
• Ignoring a small balance because the year feels closed.
• Calling CRA without the NOA, return, and account screenshots in front of you.
• Sending a cloud dump of every year without a mismatch sheet.
• Relying on a verbal “it should reverse” without written confirmation on the account.

A ninety-minute checklist

1. Save the NOA PDF. Keep paper originals if you have them.
2. Pull the filed return and working papers for that year.
3. Open CRA account history for the same program account and year.
4. Fill the mismatch sheet: income, tax, credits, payments, penalties, interest.
5. Calendar the disagreement / response date from the notice.
6. Decide: pay as assessed, fix an administrative allocation with proof, or escalate to a structured review — before you’re halfway to the deadline.

FAQ

What should I check first on a corporate CRA Notice of Assessment?

Confirm BN, year, and account. Then compare assessed income, tax, credits, and payments to the filed return, working papers, and CRA account history. Write every difference on a one-page sheet.

The balance looks wrong but income matches. What then?

Trace instalments, transfers, and prior payments against bank proof and the account history. Many “wrong balance” files are application or timing issues — still document them before you call.

Does matching the NOA mean I can’t disagree later?

Matching means the notice reflects the filing trail you have. Whether you can or should dispute the underlying tax is file-specific and time-limited. Education here; not advice on your notice.

Is this legal or tax advice?

No. This is general education for Canadian owner-managers. Your notice and facts control. Your facts and file control.

Closing

A corporate NOA is a comparison job. Open the notice, the filed return, and the account history. Fill a mismatch sheet. Calendar the date that starts the clock. Then choose the next step from facts — not from the first jolt of the balance line.