What the buy-sell agreement actually protects
For most incorporated business owners, the corporation holds the majority of the family's wealth. Not just today's value: the future growth, the compounding, the decades of returns that have not yet happened. All of it is inside the corporate structure.
A buy-sell agreement between partners is the mechanism that guarantees your family receives that value if something happens to you. Without proper funding, the agreement is a promise on paper. With funding, it is a guarantee backed by real money.
That is why the funding question matters as much as the agreement itself. You are not protecting an abstract number. You are protecting what you have spent years building for the people you built it for.
The scenario
Two partners. Equal ownership, 50/50. The company's current fair market value is $20M. Their buy-sell agreement says that if one partner dies, the surviving side gets bought out at fair market value. That is a $10M obligation per partner.
They currently fund this with term life insurance. The premium is about $660 per person per month, roughly $1,350 per month total for $20M of combined coverage. They are asking a fair question: instead of paying premiums, why not invest that money inside the corporation and build the fund ourselves?
The illustrative scenario:
| Detail | Value |
|---|---|
| Ownership | 50/50 partnership |
| Company fair market value | $20M |
| Buy-sell obligation per partner | $10M |
| Current passive investment portfolio | $5M |
| Unrealized capital gains in portfolio | $2M of the $5M |
| Current term life premium | $660/person/month |
| Total premium for $20M coverage | $1,350/month (both partners) |
Partnership
50/50 · $20M company value
$10M obligation per partner
Current portfolio
Passive investments
$5M ($2M unrealized gains)
Current insurance
Term life premium
$1,350/month (both)
The buyout fund must come from passive investments, not operating assets. If the company pulls $10M of working capital out to buy back shares, it reduces the company's value. You would be shrinking the business to pay for the business. The portfolio used for funding needs to be separate from the operations that create the company's value.
The net-of-tax target
When a CCPC liquidates passive investments, capital gains are taxed at an effective rate of roughly 25%. That is the 50% capital gains inclusion rate applied against the approximate 50% tax rate on passive investment income.
The target is not $10M in market value. It is enough market value that after paying tax on the accumulated gains, $10M remains.
Portfolio market value needed: ~$13.3M → Tax on capital gains (~25%): -$2.6M → Net available for buyout: $10M
So the question for self-insurance is: how long until the portfolio (after tax) reaches the obligation? And does that obligation stay fixed? It does not.
The accumulation: generous assumptions
Let us give self-insurance every advantage and see how the timeline looks.
Assumptions (illustrative, tilted in favor of self-insurance):
| Assumption | Value |
|---|---|
| Starting portfolio | $5M ($3M cost basis, $2M gains) |
| Annual growth rate | 15% (aggressive) |
| Monthly contribution (redirected premium) | $1,350 |
| Gains realized during accumulation | None (best case) |
| Target | $10M net of tax |
Year-by-year projection (static $10M target):
| Year | Market value | Cost basis | Unrealized gains | Tax on gains (25%) | Net after tax |
|---|---|---|---|---|---|
| Start | $5.00M | $3.00M | $2.00M | $0.50M | $4.50M |
| Year 1 | $5.77M | $3.02M | $2.76M | $0.69M | $5.08M |
| Year 2 | $6.65M | $3.03M | $3.62M | $0.90M | $5.75M |
| Year 3 | $7.66M | $3.05M | $4.62M | $1.15M | $6.51M |
| Year 4 | $8.83M | $3.07M | $5.77M | $1.44M | $7.39M |
| Year 5 | $10.17M | $3.08M | $7.09M | $1.77M | $8.40M |
| Year 6 | $11.71M | $3.10M | $8.62M | $2.15M | $9.56M |
| Year 7 | $13.49M | $3.11M | $10.38M | $2.59M | $10.89M |
Assumptions: 15% annual growth compounded monthly, $1,350/month contributions, no realized gains, no distributions. These are illustrative projections; actual returns vary and are not guaranteed.
Under these very favorable conditions, the portfolio crosses $10M net around year 7. But this assumes the target stays at $10M. It does not.
The part that changes the timeline: the target moves
The investment portfolio is part of the company. When it grows, the company's fair market value grows with it.
If the portfolio reaches $10M, the company is not worth $20M anymore. It is worth $25M. The buyout obligation per partner is now $12.5M, not $10M. The portfolio grew to reach the target, and the target moved forward.
Every dollar added to the passive portfolio increases the company's fair market value. You are building toward a number that moves every time you get closer to it.
The moving target: portfolio growth vs. actual buyout obligation
| Year | Portfolio MV | OpCo value (stable) | Total company MV | Buyout obligation (50%) | Portfolio net of tax | Gap |
|---|---|---|---|---|---|---|
| Start | $5.0M | $15.0M | $20.0M | $10.0M | $4.5M | -$5.5M |
| Year 3 | $7.7M | $15.0M | $22.7M | $11.3M | $6.5M | -$4.8M |
| Year 5 | $10.2M | $15.0M | $25.2M | $12.6M | $8.4M | -$4.2M |
| Year 7 | $13.5M | $15.0M | $28.5M | $14.2M | $10.9M | -$3.4M |
| Year 10 | $20.6M | $15.0M | $35.6M | $17.8M | $16.2M | -$1.6M |
| Year 13 | $31.4M | $15.0M | $46.4M | $23.2M | $24.3M | +$1.1M |
Assumes: 15% annual growth, $1,350/month contribution, zero realized gains, OpCo value held stable at $15M for simplicity. In reality, the operating company likely grows too, which pushes the target further.
And these are the numbers with:
- 15% consistent annual returns, no market corrections
- Only deferred gains: no interest, no dividends, no rebalancing of the portfolio
- No growth of the MV of the operations
The coverage gap
The buy-sell agreement exists to guarantee that neither family gets hurt financially if a partner passes away. The entire purpose is certainty: the money is there when it is needed.
During the accumulation period, whether that is 7 years under simplified assumptions or 13+ when accounting for the moving target, the agreement is only partially funded. The obligation is immediate. The portfolio is still building.
It is the nature of accumulation: it takes time, and the agreement does not wait.
A structural difference worth knowing
There is a distinction between insurance-funded and investment-funded buyouts that goes beyond the coverage question. It affects the surviving partner's tax position for years afterward.
You need a portfolio of
$20M after tax on growth
in the corporation today to pay $10M net to the surviving partner as a dividend, so you can match the net benefit of the insurance funding.
Death benefit flows in tax-free and is credited to the CDA. The surviving shareholder receives a tax-free capital dividend and uses it to buy the deceased partner's shares personally. Cost basis increases by $10M, reducing future tax on sale or extraction, potentially by millions.
Flow: Death benefit ($10M) → CDA → Tax-free dividend to survivor ($10M) → Buys shares → Cost basis +$10M → Future tax reduced.
The company liquidates investments, pays roughly 25% tax on gains, and uses the rest to redeem the deceased's shares. The survivor ends up with 100% ownership but their cost basis is unchanged. Same $10M obligation today; very different tax position for every year after.
Simplified comparison. Structure and province affect outcomes. Coordinate with your CPA and tax lawyer.
Sometimes this conversation shifts to personal wealth: "Between us, we have enough to cover any shortfall." The challenge is structural. A buy-sell agreement is a corporate obligation. There is no mechanism in the corporate structure that can require a surviving partner to use personal assets for a share purchase. And there is no guarantee those assets will still be available when needed: they could be committed to real estate, family obligations, or affected by the partner's own circumstances at the time.
Beyond that, personal dollars are expensive dollars. Every dollar in a personal account has already been extracted from the corporation and taxed. In Quebec, to have $10M personally available, an owner would have needed to extract roughly $17–19M in corporate earnings. The buy-sell agreement is meant to protect families. Relying on a funding source with no corporate enforcement mechanism, and that costs nearly double to accumulate, introduces uncertainty that may not serve that purpose.
The cost of protection: per $100 of coverage
Every business owner carries insurance on things they own. Here is a straightforward cost comparison: not to suggest one type of coverage matters more than another, but to put the numbers side by side.
| Coverage | Asset value | Monthly premium | Source of dollars | Cost per $100 covered |
|---|---|---|---|---|
| Home insurance ($2M home) | $2,000,000 | ~$350/month | Personal (after-tax) | $0.018 |
| Auto insurance ($100K vehicle) | $100,000 | ~$250/month | Personal (after-tax) | $0.25 |
| Buy-sell insurance ($20M business) | $20,000,000 | $1,350/month | Corporate (pre-tax) | $0.007 |
The home insurance costs the corporation roughly $700–800/month to fund after extraction tax, to protect $2M. The buy-sell insurance costs $1,350/month in pre-tax corporate dollars, to protect $20M. The cost per $100 of coverage is a fraction of what you pay for assets worth far less.
What you are actually protecting: Home insurance and car insurance protect specific assets. The buy-sell insurance protects something different: the total wealth locked in the corporation. Not just today's value, but the future growth, the compounding, and the generational transfer. It is the mechanism that ensures your family receives what you have spent years building, no matter what happens.
What to discuss with your team
Self-insurance is a goal that reflects real financial strength. Getting there means you have built something that secures the next generation. That is worth working toward.
The question is whether the portfolio is ready today: not next year, not after a few strong market years, but right now. Because the buy-sell agreement is the mechanism that guarantees your family receives the value you have built, and it needs to be funded on any given day.
If there is a gap between where the portfolio is and where the obligation stands, the conversation becomes: what does coverage cost, what does it protect, and what structural advantages does it create that self-insurance cannot replicate?
These are questions worth working through with your CPA, your tax lawyer, and your insurance advisor together. The answer touches corporate structure, tax strategy, and risk management all at once.
If you would like to see what this looks like with your actual numbers, a structure review takes a few hours and can clarify exactly where things stand.
Key takeaways
Summary of what matters for funding a buy-sell.
Net-of-tax target
You need enough portfolio value that after ~25% tax on gains, the remainder covers the obligation. For $10M, that is roughly $13.3M in market value.
Moving target
As the portfolio grows, company value grows, so the buyout obligation grows too. Under generous assumptions, the gap closes in 13+ years, not 7.
Coverage gap
During accumulation, the agreement is only partially funded. Insurance delivers full coverage from day one.
CDA advantage
Insurance-funded buyouts create a CDA credit; the survivor gets tax-free capital dividends and a stepped-up cost basis, reducing future tax on sale or extraction.
Cost per $100
Buy-sell insurance on $20M at $1,350/month is about $0.007 per $100 of coverage in pre-tax corporate dollars.
Assumptions and disclosure
This article uses illustrative examples with stated assumptions. Actual results depend on individual circumstances, market performance, tax rates, and corporate structure. Growth rates are hypothetical and not guaranteed. This is not personalized advice.
Tax note: The effective ~25% tax rate on capital gains referenced here is an approximation (50% inclusion rate applied against the approximate 50% tax rate on passive investment income in a CCPC). Actual rates vary by province and circumstance. Always confirm with your CPA.
I am a licensed Financial Security Advisor, Mutual Fund Dealing Representative, and Group Insurance and Annuity Plans Advisor. I am not a lawyer, tax lawyer, or accountant. I discuss taxes only as they relate to specific insurance, investment, and estate strategies.
This article is educational and does not constitute personalized advice. Consult your professional team for recommendations specific to your situation.
Mutual funds are offered through WhiteHaven Securities Inc. Insurance products and other services are offered through iAssure Inc. iAssure Inc. activities are neither the business nor the responsibility of WhiteHaven Securities Inc.
See what this looks like with your numbers
A structure review can clarify where your portfolio stands relative to your buy-sell obligation and what funding options make sense for your situation.