Can partners in an Ontario general partnership split profits differently than their ownership percentages?

Yes. Ontario's Partnerships Act default rule is that partners share equally in the partnership's profits (and bear losses equally) unless they've agreed otherwise, but that default only applies in the absence of an agreement — partners are free to agree to split profits however they choose, including in proportions that don't match their capital contributions or ownership percentages at all.

This flexibility is one of the practical advantages of a partnership compared to some other structures: partners can agree that one partner who contributes more sweat equity and less capital gets a larger profit share, or structure the split to reflect whatever arrangement genuinely reflects their contributions and expectations. What matters is documenting the agreed split clearly in a written partnership agreement, since without one, the equal-sharing default rule under the statute governs regardless of what the partners may have informally understood or intended. Disputes over profit-sharing are a common source of partnership conflict precisely because informal understandings don't always match what everyone remembers agreeing to, which is exactly the kind of ambiguity a written agreement is meant to prevent.