Guide

Founders' agreement in Canada: the divorce paper before the marriage

Updated October 23, 2026 · Canada · Startups & co-founders

Every startup begins with two friends and a handshake. Then the first cheque arrives — a customer, an investor, a grant — and the handshake starts to look inadequate. Who owns how much? Who decides? Who owns the code? What if one of you wants out? A founders' agreement answers all of this before money makes the answers expensive. It is a contract between co-founders that sets the equity split, vesting, roles, IP ownership, decision rules, and the exit mechanics — signed while you still like each other, so the terms were negotiated by friends rather than litigated by adversaries. This guide covers every clause it should contain, the Canadian legal defaults that apply if you never sign one, and the Ontario rules (non-compete ban, copyright, partnership defaults) that shape each provision.

What it is — and why it comes before the money

A founders' agreement is the co-founders' constitution. It sits above every later document — incorporation, shareholder agreements, term sheets — because it records the deal as it was understood when everyone was a founder and nobody was a shareholder. The classic mistake is sequencing it after the money: once a valuation exists, every percentage point has a dollar value attached, and negotiations turn adversarial. Written before revenue, the same conversation is a planning exercise among partners who trust each other.

It is also the document that prevents the most common startup dispute in Canada: the departed co-founder holding a large, inactive stake. Industry data (Carta) shows roughly a quarter to a third of two-founder teams separate within five years. Without vesting and buyback clauses, the founder who quit in month six keeps their full equity forever — un-investable dead equity that scares off future investors and poisons the remaining founder's motivation. The agreement turns that tragedy into a procedure.

Equity splits: equal, contribution-based, or something else

There is no formula — the only correct split is one every founder still feels is fair when the company is worth something. The two schools:

  • Equal splits (50/50, 33/33/33): the most common choice, and Y Combinator's recommendation. They avoid resentment, keep everyone equally committed, and remove the temptation to keep score. Best when founders are genuinely comparable in role, experience, and commitment.
  • Contribution-based splits: appropriate when contributions are clearly unequal — one founder full-time with no salary, the other nights-and-weekends with a day job. Score factors like role centrality, relevant experience, full-time commitment, cash invested, and risk taken (what each person is giving up).

Three rules apply to either approach. First, weight the future, not the past: the idea is worth very little; five years of execution is worth everything, so split on who will do what going forward. Second, keep cash separate from equity — a founder who puts in money should get a note or SAFE on the same terms as an outside investor, not extra percentage points. Third, reserve an option pool of roughly 10–15% for future hires before you finalize the numbers — seed investors will require one carved out of the founders' slice (pre-money dilution), so a 60/40 split with a 15% pool is really 51/34 fully diluted. And note the distinction: if you never incorporate and operate together for profit, Ontario's Partnerships Act section 24 imposes an equal split of profits and losses by default, whatever anyone remembers saying.

Vesting: the clause that saves the company

Vesting means founders earn their equity over time instead of owning it outright on day one. The market standard — recommended by Y Combinator and normal across Canadian startups — is four years with a one-year cliff:

  • Years 1: nothing vests. If a founder leaves before month 12, they forfeit everything — the company repurchases all their shares at the original purchase price (typically a nominal amount like $0.0001 per share).
  • Month 12: about 25% of the grant vests at once.
  • Months 13–48: the remainder vests monthly (some plans use quarterly).

Every founder vests — including the CEO. Vesting protects all sides: the remaining co-founders from dead equity, future employees from a squeezed option pool, investors from an inactive co-founder on the cap table, and the departing founder, whose clean break is possible precisely because the economics were predetermined. If the company is acquired before vesting completes, decide in advance whether any unvested equity accelerates — 'double-trigger' acceleration (acquisition plus termination) is the investor-friendly norm. Document the schedule in the agreement and implement it accurately in your cap table records.

Roles and decision-making: who is the CEO?

Ambiguity about authority is the second most common co-founder conflict. Name the roles — CEO, CTO, and so on — and describe what each person is actually responsible for day to day. Then separate decision tiers: ordinary operational decisions to the relevant founder, important decisions (hiring, spending above a threshold, taking on debt) to a founder majority, and fundamental decisions (issuing new shares, selling the company, changing the business, admitting a new co-founder) to unanimity.

For 50/50 partnerships, add a deadlock breaker now, because the majority-vote rule cannot save a tied partnership. The classic is the shotgun clause: one founder names a price for the whole company, and the other must buy at that price or sell at it — it forces fair pricing because the partner naming the price doesn't know which side of the trade they'll end up on. Also name a single tie-breaker for the mundane but constant question: who has the final word when the founders disagree about a product decision? 'The CEO decides' is a complete answer, and writing it down is the point.

IP assignment: everything created belongs to the company

This clause exists because of a Canadian legal trap. Under section 13(1) of the Copyright Act, the author of a work is its first owner — copyright belongs to the creator, not the company. Section 13(3) creates an employment exception (works created in the course of employment under a contract of service belong to the employer), but pre-incorporation founders are not employees, so that exception does not protect you: the code, designs, and trademarks your co-founder created before incorporation belong to them personally. The Ontario Court of Appeal has further narrowed the exception to work within the employee's actual assigned responsibilities, so even post-hire assumptions are riskier than they look.

The agreement must contain an express assignment: each founder assigns to the company all intellectual property they create for the business — code, designs, inventions, trademarks, business plans — both past (pre-signing contributions) and future, with a promise to sign any further documents needed to perfect the assignment. Include a moral rights waiver (moral rights can't be assigned under Canadian law, only waived in writing) and a confidentiality clause covering the business's trade secrets. If contractors or freelancers contributed anything, chase their written assignments too — an independent contractor's work never falls under the employment exception.

When a founder leaves: good leaver, bad leaver, buyback

Plan the exit mechanics while the exit is hypothetical. The standard structure:

  • Vesting stops on the departure date; unvested shares are repurchased at the original nominal price — automatic, no negotiation.
  • Vested shares: the company or remaining founders get a buyback right. For a 'good leaver' (resignation, disability, death) the price is fair market value — set a valuation method in advance (independent appraisal, an earnings multiple, or a formula). For a 'bad leaver' (fraud, breach of the agreement, joining a direct competitor) the price can be the lower of cost or a discounted value.
  • Payment terms: lump sum or instalments with interest, and how the buyback is funded if the company is cash-poor.

Add three adjacent clauses. First, a non-solicitation clause: the departing founder can't recruit your team or poach your customers for a defined period — non-solicitation survives Ontario's non-compete ban and remains enforceable when reasonable (see below). Second, a cooperation clause: the leaver signs documents needed for IP transfers and investor paperwork. Third, death and disability planning: life-insurance-funded buyouts are the classic tool, so the survivors aren't negotiating with a grieving family over an illiquid stake.

Non-compete and non-solicitation: Ontario's ban changes the calculus

Ontario bans most post-employment non-competes. Since October 25, 2021, the Working for Workers Act, 2021 (Bill 27) prohibits non-compete clauses in employment contracts and other agreements with employees — the courts confirm the ban does not void agreements entered before that date, and there are only two exceptions: 'executives' (CEO, president, COO, CFO, CIO and other chief executive positions) and the sale of a business where the seller becomes the buyer's employee. A founders' agreement with a sweeping Ontario non-compete is likely to be struck down, and including a dead clause weakens the agreement's credibility.

What still works: non-solicitation (no recruiting the team, no poaching customers) and confidentiality — both unaffected by the ban and enforceable when reasonable in scope and duration. In other provinces, non-competes remain enforceable under common-law reasonableness, but keep any restraint narrow: a short duration, a limited geography, and a defined competitive activity. The practical advice is the same everywhere: protect the company with a tight non-solicitation and a strong confidentiality clause rather than a non-compete a judge will refuse to enforce.

Dispute resolution: a ladder, not a cliff

Write the disagreement procedure while the founders still agree. The standard ladder: (1) mandatory good-faith negotiation within a fixed period; (2) mediation with a neutral mediator, costs shared; (3) binding arbitration or court as the final forum — pick one, name the seat, and state who pays. Arbitration is private and faster; courts create precedent and enforce more simply. Either beats discovering your dispute process at 2 a.m. during a founder fight.

For the 50/50 team, the shotgun clause from the decision-making section is also the dispute endgame: it converts an unresolvable disagreement into a priced buy-sell. One founder names a price for the whole business; the other must buy or sell at it. It is blunt, but it forces both sides to name a fair number — the alternative is a deadlock that kills the company while the lawyers get rich.

The contrast that should scare you: what applies without an agreement

If you never sign anything and never incorporate, you may not have a startup at all in the eyes of the law — you may have a partnership. Two or more people carrying on business in common with a view to profit are partners by default, and Ontario's Partnerships Act section 24 then supplies the rules: profits and losses shared equally regardless of contribution, no partner entitled to a salary or interest on capital, every partner able to take part in management, and — the sharpest one — any partner able to dissolve the partnership at will by giving notice. A handshake deal where one founder contributed $40,000 and the other contributed weekends becomes a 50/50 split with a free exit, enforced by statute.

If you did incorporate, the corporate defaults apply instead: whatever share classes were issued (usually equal, since nobody documented otherwise), no vesting, no buyback rights, and no way to remove a co-founder who stops contributing short of buying them out at whatever price they demand. Either way, the absence of a founders' agreement doesn't mean the absence of rules — it means the rules were written by legislators for the generic case, not by you for your company.

Mistakes that kill startups before revenue

Almost every co-founder blowup traces back to one of these avoidable failures:

  • No written agreement — the Partnerships Act equal-split defaults or undocumented equal shares govern by surprise
  • No vesting — the founder who quit in month six keeps their full stake as dead equity
  • Splitting on past contribution instead of future work — the idea person takes 50% and then coasts
  • Cash contributions counted as equity instead of a loan or SAFE — mixing investment and ownership
  • No option pool reserved — founders get diluted harder than expected at the first raise
  • IP never assigned — pre-incorporation code legally belongs to the author, not the company
  • No buyback mechanics — the departing founder's shares become a negotiation with no anchor
  • An Ontario non-compete that Bill 27 renders void — while a perfectly enforceable non-solicitation was never drafted
  • No roles defined — two CEOs, or nobody willing to be the one who decides
  • No dispute ladder — the first serious disagreement goes straight to lawyers

Draft a founders' agreement that covers all of this

Equity splits, vesting schedules, roles, IP assignment, founder buyback rules, non-solicitation, and dispute resolution — our guided builder walks you through every clause in this guide, then produces a founders' agreement ready to sign. Edit free; $1.99 to download in Word or PDF. Available in English and French.

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Frequently asked questions

What is a founders' agreement, exactly?

A contract between a startup's co-founders that decides, in advance, who owns what percentage of the company, how and when that equity vests, who does what, who owns the intellectual property, how decisions get made, and — most importantly — what happens when a founder leaves. Think of it as the divorce paper before the marriage: written while everyone is excited, so the exit terms were negotiated by friends, not adversaries.

Is a founders' agreement legally required in Canada?

No statute requires one. But a handshake is just an unrecorded contract, and an unrecorded contract is a lawsuit waiting to happen. Without a written agreement, the only rules in play are the legal defaults: if you never incorporated and you're carrying on business in common with a view to profit, you may already be a partnership, and every province's Partnerships Act — Ontario's section 24 included — then splits profits and losses equally regardless of who contributed what. A written agreement replaces ambiguity with terms you chose.

How should co-founders split equity — 50/50 or based on contribution?

There is no formula; the goal is a split every founder feels is fair three years from now, when the work — not the idea — has created the value. Equal splits are the most common choice and the one Y Combinator recommends, because they avoid resentment and keep every founder equally committed. A contribution-based split can work when contributions are clearly unequal (one founder full-time with no salary, the other part-time with a day job) — but weight future contribution, not past effort: the idea alone is worth very little, and the split should reflect who will do what going forward. Whatever you choose, reserve an option pool of roughly 10–15% for future hires before you finalize percentages, since seed investors will require one anyway.

What is the standard vesting schedule for founders?

Four years with a one-year cliff is the market norm — for founders and early employees alike, in Canada as in Silicon Valley. Nothing vests during the first 12 months; at the 12-month mark about 25% vests at once, and the rest vests monthly (or quarterly) over the remaining three years. If a founder leaves or is terminated before the cliff, they forfeit all unvested shares — the company repurchases them at the original purchase price, typically a nominal amount. This is the single most important clause in the agreement: Carta's data shows 25–35% of two-founder teams separate within five years, and without vesting the departed founder walks away with their full stake while the remaining founder does all the work.

Who owns the startup's IP if we never signed anything?

The author does — not the company. Under section 13(1) of Canada's Copyright Act, the creator of a work is its first owner. There is an employment exception in section 13(3) that hands copyright to the employer for works created in the course of employment, but pre-incorporation founders are not employees, so that exception doesn't protect you — the code your co-founder wrote before incorporation belongs to them personally unless it was assigned. The Ontario Court of Appeal has also narrowed the exception to work that falls within the employee's actual assigned responsibilities. The founders' agreement must contain an express IP assignment: everything each founder creates for the business — code, designs, trademarks, business plans — is assigned to the company, present and future. (Moral rights can't be assigned at all, only waived in writing, so include a waiver too.)

What happens when a co-founder leaves after two years?

Whatever your agreement says — which is why you write it now. The standard machinery: (1) vesting stops the day they leave; (2) unvested shares are repurchased by the company at the original (nominal) price; (3) vested shares stay theirs — after two years on a four-year schedule, that's half their grant. Many agreements add a buyback right for vested shares: the company or remaining founders can repurchase them at fair market value, or at a discount for a 'bad leaver' (fraud, breach, competing) versus full value for a 'good leaver'. Also decide on acceleration: does any unvested equity vest early if the company is acquired and the founder is terminated? Investors will ask about all of this in diligence, so have written answers.

Can our founders' agreement include a non-compete in Ontario?

Almost certainly not for regular employees — and a founders' agreement with an overbroad non-compete risks being worthless paper. Since October 25, 2021, Ontario's Working for Workers Act, 2021 (Bill 27) prohibits non-compete clauses in employment contracts and other agreements with employees, with only two exceptions: employees who are 'executives' (CEO, president, COO, CFO and other chief executive positions) and the sale of a business where the seller becomes the buyer's employee. Crucially, non-solicitation clauses are not affected by the ban and remain enforceable — a well-drafted non-solicitation and confidentiality clause protects you better than a non-compete that a court will strike down. Other provinces allow non-competes under common-law reasonableness, but keep any restraint narrow in duration, geography, and scope wherever you are.

What if we never wrote anything and one founder did all the work?

Then the defaults decide, and they don't care who worked harder. If you never incorporated but operated together for profit, you may be a partnership: Ontario's Partnerships Act section 24 splits profits and losses equally, gives no partner a salary or interest on capital, and lets any partner dissolve the partnership at will by giving notice. If you did incorporate, the shareholders are stuck with the articles and whatever share classes were issued — usually equal, since nobody documented anything else. Either way, 'we'll sort it out later' becomes 'a lawyer sorts it out at $400 an hour.' Courts have seen this case thousands of times; every judge's answer is the same: it should have been in writing.

When should we sign a founders' agreement?

Before the first dollar of revenue, before the first investor cheque, and ideally before (or at) incorporation — certainly before any money makes the percentages worth fighting over. The agreement is cheapest to negotiate when everyone is optimistic and the stakes feel low; it becomes exponentially harder after a valuation exists. If you've already incorporated without one, fold the terms into a shareholders' agreement instead — same clauses, corporate wrapper. But don't wait for the raise: the week before you sign a term sheet is not the week to discover your co-founder thought their split was 50/50.

Can we change a founders' agreement after signing it?

Yes — and you probably will, as roles evolve and new co-founders or advisors join. Require changes in writing, signed by all founders (or a supermajority for specified clauses), and keep every signed version. What you can't do is change it unilaterally: one founder can't decide mid-way that their 30% should be 45% because they're working weekends. The agreement's amendment clause is itself protection against revisionist history.

This guide is general information about founders' agreements, vesting market practice, Canadian copyright and non-compete law, and Ontario partnership defaults as of October 2026, not legal advice about your startup. Vesting structures and buyback pricing have tax consequences, and corporate share issuances involve securities considerations — have a startup lawyer and an accountant review your agreement before signing.

This guide is general information about Canadian law, not legal advice. Laws change and every situation is different — have a licensed lawyer in your province review your document before you rely on it.