Case Study 01 · Tax Architecture
What Is the Absence of Structure Costing This Physician?
Ontario Medical Corp · Manitoba Investment Properties · Physician $689,000 · Spouse $200,000 · 2 Minor Children
Ontario + Manitoba · 2025 · 2 Minor Children
$618K
Tax — No Blueprint
Annual family tax unstructured
$227K
Tax — With Blueprint
Year 1 with architecture
$390K
Year 1 Saving
Incl. IPP past service deduction
$2.06M
5-Year Saving
Cumulative excess tax avoided
The Situation
This physician operates a Medical Professional Corporation in Ontario earning $689,000 in active business income. The spouse earns $200,000 as an employee. Manitoba rental AAII of $96K flowing through the HoldCo is actively grinding down the Ontario SBD limit from $500K to $270K — adding $32,890 in excess corporate tax every year. No IPP has been established despite four years of eligible T4 history. Every retained dollar extracted personally is taxed at Ontario's 53.53% top rate. The HoldCo TOSI position has never been reviewed. There is no estate freeze, no family trust, and no funded liability for the growing capital gains embedded in the HoldCo.
Critical Gaps
AAII Grind Active — $32,890/yr Excess Tax
$96K Manitoba rental AAII has reduced the Ontario SBD limit from $500K to $270K. COLI inside HoldCo is the fastest mitigation available under ITA s. 125(5.1).
HoldCo TOSI — 53.53% Ontario Rate at Risk
Every HoldCo dividend to spouse without a confirmed TOSI exclusion is taxed at Ontario's 53.53% top rate. Attribution review under ITA s. 74.1 also required immediately.
No IPP — 4 Years Past Service Expiring
T4 history since 2021 supports a $140K–$200K one-time past service deduction under ITA s. 147.2. Every year without establishment is permanent lost room.
No Estate Freeze — HoldCo Growing Unchecked
HoldCo accumulates $350K–$400K annually. Without an ITA s. 86 freeze, all growth falls in the physician's taxable estate. Deemed disposition on death under ITA s. 70(5).
Current Structure vs. Fiscal Architecture Blueprint
| Area | Without Structure | With Architecture |
|---|---|---|
| Block 1 — Ontario Medical Professional Corporation | ||
| Gross active business income | $689,000 | $689,000 |
| Salary + IPP + operating deductions | No optimization | ($259,500) deducted |
| IPP past service buyback — 4 years (2021–2024) | $0 — not established | ($170,000) one-time |
| Revised corporate taxable income | $657,000 | $259,500 |
| Ontario corporate tax (SBD 12.2% + general 26.5%) | ~$143,975 | ~$32,859 |
| AAII grind: $96K reduces Ontario SBD limit to $270K | ~$32,890 extra tax/yr | COLI neutralizing grind |
| Block 2 — Manitoba HoldCo Rental Income (2 × $4,000/month) | ||
| Net HoldCo rental taxable income | $61,000 | $61,000 |
| HoldCo tax @ 27% Manitoba general rate | ($16,470) | ($16,470) |
| PropCo characterization + multi-provincial compliance | Risks unaddressed | Legal opinion obtained |
| Block 3 — Physician Personal Income (Ontario) | ||
| Ontario personal tax on physician extraction | ~$368,817 (full @ 53.53%) | ~$72,200 (optimized T4) |
| RRSP + IPP sheltered annually | $0 | ~$79,490 sheltered |
| Block 4 — Spouse Employment Income (Ontario — $200,000) | ||
| Ontario personal tax on $200K employment | ~$87,000 | ~$87,000 |
| HoldCo dividend to spouse (TOSI exclusion confirmed) | Not done — 53.53% risk | $40K @ 47.74% — saves $5,700 |
| Spousal RRSP + prescribed rate loan | $0 | $32,490 sheltered + ~$4K/yr |
| Block 5 — Estate & Creditor Position | ||
| Estate freeze on HoldCo (ITA s. 86) | None — growth fully taxable | Recommended — act now |
| Family trust — LCGE multiplication (ITA s. 110.6) | $0 utilized | Up to $5M (4 beneficiaries) |
| COLI — AAII shield + CDA on death (ITA s. 89(1)) | No policy | HoldCo COLI implemented |
| HoldCo TOSI + attribution audit | Not completed — at risk | Critical — immediate priority |
| Total Annual Family Tax | ~$618,192 | — |
| Total Annual Tax — With Architecture | — | ~$227,484 |
| Year 1 Family Tax Saving With Architecture | — | ~$390,708 |
Red = current cost. Green = with architecture. Figures are estimates based on 2025 rates.
5-Year Cumulative Cost of Inaction
| Year | Tax — Current | Tax — Architecture | Annual Saving | Cumulative Saving |
|---|---|---|---|---|
| 2025 (Yr 1 — incl. IPP past service) | $618,192 | $227,484 | $390,708 | $390,708 |
| 2026 | $649,102 | $261,056 | $388,046 | $778,754 |
| 2027 | $681,557 | $274,109 | $407,448 | $1,186,202 |
| 2028 | $715,635 | $287,814 | $427,821 | $1,614,023 |
| 2029 | $751,417 | $302,205 | $449,212 | $2,063,235 |
The Architecture Blueprint — 6 Core Levers
Salary + IPP Optimization
$180,500 T4 optimizes RRSP room. IPP ~$47K/year + $140K–$200K past service deducted at Medical Corp level before Ontario SBD applies.
ITA s. 147.2 · s. 8504 · s. 5
COLI — AAII Neutralization
Permanent life insurance inside HoldCo. Exempt cash value does not constitute AAII. Eliminates $32,890/yr SBD grind. On death: CDA benefit — tax-free for spouse.
ITA s. 89(1) · s. 125(5.1)
HoldCo TOSI Audit + Fix
Confirm excluded shares test (ITA s. 120.4(1)). Cure attribution with prescribed rate loan. Unlock dividend splitting at 47.74% vs. 53.53%.
ITA s. 120.4 · s. 74.1 · s. 74.5
Estate Freeze + Family Trust
ITA s. 86 freeze locks HoldCo equity. Discretionary trust holds new common shares. LCGE: $1.25M per person — $5M combined family pool.
ITA s. 86 · s. 110.6 · s. 104
Spousal RRSP + Prescribed Rate Loan
Physician contributes $32,490 to spousal RRSP at 53.53% Ontario rate. Prescribed rate loan shifts investment income to spouse's bracket permanently.
ITA s. 146(1) · s. 74.5
HoldCo Surplus Deferral
After-tax MedCorp surplus flows to HoldCo tax-free. Compounds at Manitoba's 27% corporate rate vs. 53.53% personal rate extraction.
ITA s. 112(1)
“This physician's combined Ontario and Manitoba tax exposure without architecture is $618,192 per year. With the Fiscal Architecture Blueprint: $227,484 in Year 1 — a Year 1 saving of $390,708. Over five years, the cumulative cost of the current structure is $2,063,235. The structure does not cost money. The absence of it does.”
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All Fiscal Architecture Blueprint Diagnostics are conducted under the supervision of Olutosin Oluwasanmi, Managing Counsel, Ellan Law Corporation — a member in good standing of the Law Society of Manitoba. This case study is illustrative and does not constitute legal or tax advice.