6 worked Windsor 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 Windsor and its provincial tax regime, not a specific client's file.
Case Study 1 · Cash and remittance control
Remittance Schedule Corrected, $120,000 Refunded — Family Medicine Clinic, Windsor
Client: A family medicine clinic. Where: Windsor, Ontario. Engagement: 8 weeks, fixed fee.
Overpayment refunded$120,000
Late remittances sinceZero
ScheduleAutomated
Case 1: the situation
Remittances at a family medicine clinic in Windsor, Ontario were consistently late by a few days. That was enough to trigger penalties every quarter. Behind it sat 13% HST charged on every sale regardless of where the customer was located.
Case 1: what we did
We recalculated the corporate tax at the 12.2% combined small business rate and rebased the instalments on the current year. Then we moved the remittance dates into a scheduled process rather than a monthly decision.
Case 1: the result
Penalties stopped from the following remittance onwards, and $120,000 of overpaid instalments was refunded.
Case Study 2 · Planning that cut the bill
Remuneration Review Saved $49,000 Across Corporate And Personal Returns — Mobile App Studio, Windsor
Client: A mobile app studio. Where: Windsor, Ontario. Engagement: 5 weeks, fixed fee.
Combined saving$49,000
ScopeCorporate + personal
Future yearsNo rework needed
Case 2: the situation
Nothing was wrong at a mobile app studio in Windsor, Ontario. The filings were on time and accurate. What they were not was planned. Sector-specific exposure the previous accountant had not seen before had never been reviewed.
Case 2: what we did
We assessed and claimed Ontario Made Manufacturing Investment Tax Credit alongside the federal return. We ran the numbers across both the corporate and personal returns, so the saving was real rather than deferred into someone else's hands.
Case 2: the result
$49,000 came off the combined corporate and personal tax bill, and the structure holds for future years without further work.
Case Study 3 · Scaling without breaking
Second-Province Expansion Handled, $150,000 Of Cash Released — Packaging Producer, Windsor
Revenue at a packaging producer in Windsor, Ontario was up sharply and cash was tighter than ever. Underneath it sat out-of-province sales billed at the ON rate instead of the customer’s.
Case 3: what we did
We registered the provincial payroll account, caught up the outstanding remittances, and applied for relief on the penalty. Every new obligation was set up before it was triggered, not after. That covered registration, remittance frequency and provincial filing.
Case 3: the result
$150,000 of cash was released from the working capital cycle. The expansion completed with every registration and filing obligation covered from day one.
Case Study 4 · CRA review defended
$137,000 Proposed Adjustment Withdrawn In Full — Translation Services Company, Windsor
A translation services company in Windsor, Ontario received a proposal letter opening a review of its ON tax and accounting file. The CRA had identified instalments still calculated on a year the business had long outgrown. It proposed an adjustment of $137,000, with 30 days to respond.
Case 4: what we did
We treated the response as an evidence exercise rather than an argument. We rebuilt the sales ledger by customer location, applied the correct place-of-supply rate to each stream, and filed the adjusted HST returns. We then indexed every supporting document against the specific line the auditor had questioned.
Case 4: the result
The proposed adjustment was withdrawn in full — all $137,000 of it. The file closed in 10 weeks with no change to the assessed amounts and no penalty.
Case Study 5 · Missed incentive claimed
$127,000 Credit Claim Filed And Accepted Without Adjustment — Captive Insurance Manager, Windsor
A captive insurance manager in Windsor, Ontario assumed the credits did not apply to a business its size. Ontario Regional Opportunities Investment Tax Credit eligibility that had never been assessed meant they had applied all along.
Case 5: what we did
We identified the qualifying activity and built the documentation to support it. Then we assessed and claimed Ontario Innovation Tax Credit alongside the federal return.
Case 5: the result
$127,000 recovered. Because the eligibility analysis is on file, the same claim can be repeated each year with a fraction of the effort.
Case Study 6 · Sale and succession
Share Sale Restructured, $620,000 Less Tax On Closing — Insurance Brokerage, Windsor
An insurance brokerage in Windsor, Ontario was preparing to sell. Due diligence surfaced a minute book with no resolutions behind a decade of dividends. That would have reduced the price or killed the deal outright.
Case 6: what we did
We cleaned up the historical file. We recalculated the corporate tax at the 12.2% combined small business rate and rebased the instalments on the current year. Then we prepared the due-diligence package the buyer's advisers actually asked for.
Case 6: the result
The deal closed at the agreed price. $620,000 of tax was saved against the structure originally proposed, with no post-closing adjustment.
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.
