Can I recover my legal costs if I win this case?

Only in two specific circumstances: if your partnership agreement itself contains a fee-shifting clause, a specific contractual provision stating that the losing party in a dispute must pay the winning party's attorney fees, or if some other specific statute independently applies to grant you fee recovery on your particular type of claim. Many, though not all, written partnership agreements do include a fee-shifting provision of some kind.

Reviewing your specific agreement clause by clause to determine whether and how this provision applies is a genuinely important step, since the presence or absence of a workable fee-shifting clause can be the deciding factor in whether pursuing litigation to recover a larger disputed amount actually makes overall financial sense, particularly once you factor in the real cost of the discovery process, expert witnesses, and potentially years of litigation.