SiLaw Group Family Lawyers logo

Hartshorne v Hartshorne (2004 SCC 22)

Case at a glance
CaseHartshorne v Hartshorne
Citation2004 SCC 22
CourtSupreme Court of Canada
Year2004
TopicAgreements
Central questionAre prenuptial agreements enforceable in BC?

Key takeaways {#takeaways}

  • The Supreme Court of Canada upheld a wedding-day prenup that left the wife far less than the statute would.
  • Courts test whether the agreement operates fairly at separation, not just whether it looked fair when signed.
  • If life unfolds as the couple expected, the spouse attacking the agreement carries a heavier burden.

Hartshorne v Hartshorne at a glance {#summary}

Yes. BC law lets spouses make their own property deal, and courts will generally respect it. But a prenup — the statute calls it a marriage agreement — can still be set aside or varied if it was formed unfairly or works significantly unfairly later. Hartshorne is the Supreme Court of Canada's leading decision on when a prenup holds.

Most people assume a contract signed on your wedding day, against your own lawyer's advice, will not survive a divorce. Kathleen Hartshorne's lawyer warned her the agreement was "grossly unfair" — she signed anyway. Nine years of marriage later, the agreement gave her about $280,000 while her husband kept about $1.2 million. The trial judge and the BC Court of Appeal rewrote the deal. The Supreme Court of Canada restored it. What a prenup is worth in BC turns on why.

The facts {#facts}

Robert and Kathleen Hartshorne were both lawyers. He was called to the BC bar in 1972, she in 1981. She articled at his firm and worked there as an associate, earning $48,000 a year, until she left on maternity leave in June 1987. From then on she stayed home as the full-time caregiver for the couple's two children, one of whom has special needs (para 4).

They began living together in 1985. Their first child was born in July 1987, they married on March 11, 1989 — a second marriage for both — and their second child was born that November. They separated in January 1998, after about 12 and a half years together, nine of them married (paras 3, 7).

Robert's first divorce had cost him a division of property, and he told Kathleen before the wedding that he would never allow that again. He brought roughly $1.6 million in assets into the marriage: a home, two recreational properties, RRSPs and savings, and his law practice. Kathleen brought no assets and was heavily in debt (para 5).

He had a marriage agreement drawn up. It made the spouses separate as to property, with one exception: Kathleen would earn a 3 percent interest in the family home for each year of marriage, capped at 49 percent (para 6). Both sides got independent legal advice. Kathleen's lawyer wrote her a detailed opinion calling the proposed agreement "grossly unfair", predicting a court would intervene, and strongly recommending she not sign it in that form (para 60). She negotiated only small changes — including a clause preserving her right to spousal support — and signed on the wedding day, at Robert's insistence (paras 6, 57, 61).

At separation, the agreement gave Kathleen property worth about $280,000. Robert kept about $1.2 million (para 63).

The legal issues {#issues}

The appeal put four questions to the Court (paras 2, 38, 54–56, 66):

  1. Was the property division under the marriage agreement "unfair" under s. 65(1) of BC's Family Relations Act, so a court could reapportion it?
  2. Should marriage agreements get more, less, or the same deference as separation agreements — and does the framework from Miglin v Miglin (a separation-agreement case) apply?
  3. Should the husband's law practice count as a "family asset" open to division?
  4. In what order should a judge deal with property division and spousal support, and how is double recovery avoided?

What the court decided {#decision}

The trial judge, Beames J, found the agreement unfair and reapportioned. She split the family home and contents equally, and divided most other family assets — including the law practice — 60/40 in Robert's favour. The net effect: Kathleen received about $654,000, roughly 46 percent of family assets valued around $1,415,000, instead of the roughly $280,000 (about 20 percent) the agreement provided (paras 22–25). She also awarded spousal support of $2,500 per month, dropping to $1,500 once Kathleen earned $2,000 a month (para 16). The BC Court of Appeal upheld the property result, with Thackray JA dissenting (paras 27, 31).

The Supreme Court of Canada allowed the appeal 6–3 and restored the agreement. Bastarache J wrote for the majority; Binnie, LeBel and Deschamps JJ dissented in part.

The majority's reasoning, in short:

  • Fairness is the guiding objective of BC's property regime, and an agreement must operate fairly at the time of distribution to be enforced (paras 34–35). But where private parties take responsibility for their own financial arrangements, "courts should be reluctant to second-guess the arrangement on which they reasonably expected to rely" (para 36).
  • The key question is whether the spouses' circumstances at separation were within their reasonable contemplation when they made the agreement, and whether they made adequate arrangements for those circumstances (para 43).
  • Here, everything unfolded exactly as planned: no commingling of funds, his pre-marriage assets stayed in his name, they had a second child, and she stayed home to raise the children (para 45). Where a couple accurately predicted their circumstances, a finding of unfairness "should not be made lightly" (para 46).
  • The trial judge erred in sequence: she should have applied the agreement first, then determined spousal support (which the agreement preserved), and only then asked whether the s. 65 factors still required a different property split. Using Kathleen's need for self-sufficiency to justify both support and reapportionment risked double recovery (paras 51, 56–58).
  • The agreement "was fair at the time of the triggering event" and should be left intact (para 65). The law practice was not a family asset: it was used for business purposes, and its value had not increased during the marriage (para 66).

The dissent would have deferred to the trial judge's finding of unfairness, stressing that signing an agreement knowing it is unfair does not cure the unfairness, and that fairness must be measured against the s. 65(1) factors at the time of the court application (paras 89, 92). Even the dissent, though, would have returned the law practice to Robert, because reapportioning his main income source on top of spousal support amounted to double recovery (paras 99–102).

Where the law stands now. Hartshorne was decided under s. 65(1) of the Family Relations Act, which let a court reapportion property whenever an agreement's division would be "unfair" (the section is set out in full at para 72 of the judgment). That Act has since been replaced. For BC spouses today, the governing provision is s. 93 of the Family Law Act, SBC 2011, c 25. Section 93(3) lets the court set aside a property agreement for defects when it was made — non-disclosure, taking improper advantage of a spouse's vulnerability, a spouse not understanding the agreement, or ordinary contract-law grounds. Section 93(5) adds a second route: even a properly made agreement can be set aside if it is "significantly unfair", considering the time passed, the spouses' intention to achieve certainty, and their reliance on the agreement. On its face that is a stricter test than the old "unfair" standard, and s. 94(2) bars the court from dividing property covered by such an agreement unless it is first set aside under s. 93. This commentary verified the current statute text; it has not verified how recent BC decisions apply Hartshorne under s. 93, so treat the case's continuing weight as a point for counsel to confirm.

Are prenuptial agreements enforceable in BC? {#the-test}

Yes — and Hartshorne explains the attitude BC courts bring to them. The majority put it this way: once an agreement is reached, "the parties thereto are expected to fulfill the obligations that they have undertaken", and unfairness is not proven simply by showing the deal differs from what the statute would give you (para 67).

Under the Family Relations Act, the Court set a two-stage approach (para 47). First, apply the agreement: work out what each spouse actually receives under it and from every other source, including spousal and child support. Second, ask whether that overall result operates unfairly, judged against the statutory factors and against how the couple's lives actually evolved.

The centre of gravity is expectation. If your separation looks like the future you both planned for when you signed — as the Hartshornes' did — you will carry a heavier burden to convince a court the agreement is unfair (para 47). If life took a turn the agreement never addressed, the court is far more willing to intervene (para 43, discussing the BC Court of Appeal's decision in N (DK) v O (MJ)).

Today the mechanics run through s. 93 of the Family Law Act rather than s. 65 of the old Act (see the callout above). The two-part logic is familiar, though: one set of grounds about how the agreement was made, and a separate, harder test — "significantly unfair" — for agreements that were made properly but produce a harsh result later.

The framework {#numbers}

The Hartshorne two-stage inquiry under s. 65(1) of the Family Relations Act (para 47), with the factors the trial judge weighed:

Stage What the court asks How it played out in Hartshorne
1. Apply the agreement What does each spouse get under the agreement and from all other sources, including spousal and child support? About $280,000 to the wife, $1.2 million to the husband — plus a preserved right to spousal support the lower courts wrongly ignored (paras 57, 63)
2. Test for unfairness against s. 65(1) (a) duration of the marriage 12½ years of cohabitation, 9 married — significant, but weighed against when the property was acquired (para 49)
(c) when property was acquired Almost all of the $1.6 million was the husband's before the relationship began (para 49)
(e) each spouse's need to become or remain economically independent Largely met through spousal and child support — not to be counted again in the property split (paras 51, 56)
(f) other circumstances (contributions, capacities, liabilities) Her work on the family home mattered less than his premarital capital that paid for it (para 53)
Overlay Did life unfold as the spouses reasonably contemplated when they signed? Yes — separate property maintained, second child born, wife at home as planned — so the burden to establish unfairness was heavier (paras 45–47)

What this means if you're separating in Surrey {#bc-impact}

If you signed a marriage or cohabitation agreement, do not assume a court will rescue you from it — and do not assume it is bulletproof either. Hartshorne shows that BC courts start from respect for the deal you made, especially where both of you had independent legal advice. The route to challenging it today is s. 93 of the Family Law Act, and the "significantly unfair" wording sets a real hurdle.

Timing and expectations matter. A court will look hard at whether your life together turned out the way the agreement assumed. A career given up, a child's special needs, a long marriage the agreement never priced in — these are the kinds of facts a judge weighs. But if the agreement anticipated your situation and dealt with it, expect it to hold.

Support and property are linked. Hartshorne treated Kathleen's preserved right to spousal support as a key reason the property terms were fair. If your agreement keeps support open, that can carry more weight than you expect — in either direction. See child support in BC for how support is assessed.

Finally, the case is a warning about wedding-day signings. Kathleen's agreement survived, but only after years of litigation through three levels of court. A properly negotiated separation agreement or a prenup done early, with disclosure and unhurried advice, is far cheaper than testing Hartshorne yourself. If you are at the start of a split, divorce in BC explains the process, and family mediation is often the least expensive way to resolve property questions an agreement leaves open.

How a lawyer uses Hartshorne {#in-practice}

Defending an agreement, counsel leads with the expectation analysis: show the parties predicted their circumstances, structured their affairs consistently with the agreement throughout the marriage, and addressed future needs elsewhere — most powerfully through a preserved support right (paras 45–47, 57–58). Independent legal advice is a shield here: the Court held Kathleen could not rely on her own lawyer's warning to argue she never intended to be bound (para 61).

Attacking an agreement, counsel looks for the gap Hartshorne left open: circumstances at separation that the agreement did not reasonably contemplate or failed to address (para 43). The dissent's catalogue — vulnerability in negotiation, pressure of an approaching wedding, refusal to negotiate substantive changes (para 90) — now maps closely onto the s. 93(3) formation grounds in the Family Law Act.

Hartshorne also disciplines the order of analysis: apply the agreement, fix support, and only then ask whether property needs reapportioning — never counting self-sufficiency twice (para 56). Both the majority and the dissent treated support plus reapportionment of the same income source as double recovery, a point that still matters whenever a business or professional practice is on the table. For worked examples of agreement disputes, see our case studies.

Frequently asked questions {#faq}

Does signing against my lawyer's advice make a prenup invalid?

No — Hartshorne shows the opposite risk. Kathleen signed after her lawyer called the deal "grossly unfair", and the Supreme Court held she could not later use that advice to escape the agreement; being forewarned meant she understood what she was signing (paras 60–61). Independent legal advice protects the agreement as much as it protects you.

Can an agreement signed on the wedding day still stand?

It can. The Hartshorne agreement was signed on the wedding day, at the husband's insistence, and the trial judge found no duress, coercion or undue influence (paras 6, 17). Wedding-day pressure is still a bad idea — under today's s. 93(3), taking improper advantage of a spouse's vulnerability is a ground to set an agreement aside — but timing alone does not doom a prenup.

Does Hartshorne still apply under the Family Law Act?

Hartshorne interpreted the old Family Relations Act, which has been replaced. Property agreements are now tested under s. 93 of the Family Law Act, which uses a "significantly unfair" standard and its own list of considerations. The case's core ideas — respect for informed bargains, and testing fairness against what the spouses reasonably expected — echo in the new wording, but how courts currently apply it is something to confirm with counsel on the up-to-date case law.

References {#references}

Read the decision itself: Hartshorne v Hartshorne, 2004 SCC 22