Internal Controls Review Case Studies

6 worked Internal Controls Review case studies — the position a client typically comes to us with, what we do, and what it is worth. Each is an illustrative example built on the rules that apply to internal controls review work, not a specific client's file.

Case Study 1 · Scaling without breaking

Growth Handled Without A Missed Filing, $47,000 Freed — Business Preparing for Sale, Brampton

Client: A business preparing for sale  ·  Where: Brampton, Ontario  ·  Engagement: 7 weeks, fixed fee

Cash freed$47,000
Compliance failuresNone
ReportingMonthly

The situation — A business preparing for sale, Brampton, Ontario

A business preparing for sale in Brampton, Ontario was opening in a second province. That meant different filing obligations and a different payroll regime. A prior-year restatement with no note explaining what changed already sat in the file.

What we did for A business preparing for sale, Brampton, Ontario

We prepared a due-diligence-ready statement set with supporting schedules for each material balance. We then put monthly reporting in place. That let the owner see the cash effect of growth while there was still time to act on it.

The result — A business preparing for sale, Brampton, Ontario

Growth was absorbed without a compliance failure. $47,000 of cash was released, and the monthly reporting now flags a problem while it is still small.

Case Study 2 · Planning that cut the bill

Remuneration Review Saved $55,000 Across Corporate And Personal Returns — Restating Corporation, Edmonton

Client: A corporation restating a prior year  ·  Where: Edmonton, Alberta  ·  Engagement: 8 weeks, fixed fee

Combined saving$55,000
ScopeCorporate + personal
Future yearsNo rework needed

The situation — A corporation restating a prior year, Edmonton, Alberta

Nothing was wrong at a corporation restating a prior year in Edmonton, Alberta. The filings were on time and accurate. What they were not was planned. A bonding limit capped because the last statements were prepared on a cash basis had never been reviewed.

What we did for A corporation restating a prior year, Edmonton, Alberta

We described the revenue and inventory policies in the basis-of-accounting note in terms a lender could follow without asking a question. We ran the numbers across both the corporate and personal returns, so the saving was real rather than deferred into someone else's hands.

The result — A corporation restating a prior year, Edmonton, Alberta

$55,000 came off the combined corporate and personal tax bill, and the structure holds for future years without further work.

Case Study 3 · Cash and remittance control

Instalments Rebased, $82,000 Of Cash Returned To The Business — Covenant-Bound Borrower, Moncton

Client: A company under a bank covenant  ·  Where: Moncton, New Brunswick  ·  Engagement: 11 weeks, fixed fee

Cash returned$82,000
Instalment basisCurrent year
ReviewedQuarterly

The situation — A company under a bank covenant, Moncton, New Brunswick

A company under a bank covenant in Moncton, New Brunswick was paying instalments calculated on a prior year. That year no longer reflected the business. Statements delivered five months after year-end, past the covenant deadline was tying up $82,000 of cash.

What we did for A company under a bank covenant, Moncton, New Brunswick

We rebased the instalments on the current-year estimate rather than the prior-year default. Alongside that, we prepared the supporting schedule for every material balance in advance, which cut the queries the engagement had to raise.

The result — A company under a bank covenant, Moncton, New Brunswick

$82,000 of cash stayed in the business, the penalty cycle ended, and the instalment position is reviewed each quarter against actual results.

Case Study 4 · Records and systems rebuilt

Books Rebuilt From Source, $3,000 In Unclaimed Input Tax Found — Bonded Work Bidder, Saskatoon

Client: A contractor bidding on bonded work  ·  Where: Saskatoon, Saskatchewan  ·  Engagement: 9 weeks, fixed fee

Unclaimed tax found$3,000
Records rebuilt22 months
ProcessDocumented

The situation — A contractor bidding on bonded work, Saskatoon, Saskatchewan

A contractor bidding on bonded work in Saskatoon, Saskatchewan could not answer basic questions about its own numbers. A bank asking for a review engagement while the file only supported a compilation sat between the bank statements and the ledger.

What we did for A contractor bidding on bonded work, Saskatoon, Saskatchewan

We converted the records to the accrual basis, restated the comparative year with proper disclosure, and rebuilt the statement package around the bonding company’s requirements. We then documented the process so the work does not depend on any one person remembering how it was done.

The result — A contractor bidding on bonded work, Saskatoon, Saskatchewan

Records rebuilt and reconciled, $3,000 recovered in input tax credits that the old file could not support, and a documented monthly process now in place.

Case Study 5 · Deadline rescue

11-Week Turnaround Beat The Deadline And Saved $12,500 — Due-Diligence Vendor, Calgary

Client: A vendor assembling due-diligence records  ·  Where: Calgary, Alberta  ·  Engagement: 11 weeks, fixed fee

Late-filing penalty avoided$12,500
Filed with17 days to spare
Next yearPapers ready

The situation — A vendor assembling due-diligence records, Calgary, Alberta

A vendor assembling due-diligence records in Calgary, Alberta was weeks away from the deadline for internal controls review. Behind that sat an insurer asking for statements from an independent practitioner who had also been writing the bookkeeping entries. The exposure if the date slipped was around $12,500.

What we did for A vendor assembling due-diligence records, Calgary, Alberta

We read the shareholder agreement and the loan documents and established what level of assurance each user actually required. We scoped the engagement to the highest of them. The filing went in complete rather than provisional, so there was no amended return to follow.

The result — A vendor assembling due-diligence records, Calgary, Alberta

Filed with 17 days to spare. $12,500 in late-filing penalties avoided, and the working papers are ready for the following year.

Case Study 6 · Objection and relief

$68,000 Of Penalties And Interest Cancelled On Relief — Shareholder Buyout Corporation, Red Deer

Client: A corporation entering a shareholder buyout  ·  Where: Red Deer, Alberta  ·  Engagement: 3 weeks, fixed fee

Penalties and interest cancelled$68,000
Relief groundsAccepted
AssessmentAdjusted to filed position

The situation — A corporation entering a shareholder buyout, Red Deer, Alberta

An assessment of $68,000 landed at a corporation entering a shareholder buyout in Red Deer, Alberta following a desk review. It turned on an unusual revenue recognition policy that appeared nowhere in the basis-of-accounting note. The auditor had not seen the records behind it.

What we did for A corporation entering a shareholder buyout, Red Deer, Alberta

We separated the bookkeeping work from the assurance engagement so the independence question had one clear answer. We then set out the legislative basis for the position alongside the documents supporting it.

The result — A corporation entering a shareholder buyout, Red Deer, Alberta

$68,000 of penalties and interest was cancelled under the taxpayer relief provisions, and the underlying assessment was adjusted to match the filed position.

Reviewed by Udit Gupta, Founder and Tax Accountant for the 2025 tax year. These case studies are illustrative worked examples composed from the CRA rules that apply to this type of work, not specific client files; figures are representative and outcomes depend on your own facts.

Sources. CRA — Businesses · Income Tax Act (Justice Laws Website)

← Back to Internal Controls Review  ·  All case studies

Free 15 Min Consultation for Businesses

Ready to get started with Internal Controls Review tax support?

Talk to a professional tax accountant about your situation. No obligation, and you only pay once the work is complete and you have approved it.

  • Tax accountant led team
  • Fixed fees, no hourly billing
  • Pay only after you approve

+1 (416) 619-0068 381 Front St W, Toronto, ON M5V 3R8

Our Partners Are Alumni of the World's Top Accounting and Tax Institutions

Chartered Professional Accountants Canada AICPA — American Institute of Certified Public Accountants Institute of Chartered Accountants of India Malaysian Institute of Accountants