Qui prior est tempore, potior est jure meaning

A practical rule that, where two or more parties claim the same right or asset, the claim created, acquired or perfected first will usually take priority over later ones. The Latin maxim is descriptive rather than statutory, but is recognised in case law and used across property, equity, secured lending and insolvency. Typical applications include the ranking of mortgages and fixed or floating charges, competing assignments of debts, and conflicts between equitable interests—often expressed as “where the equities are equal, the first in time prevails”. In England & Wales, Northern Ireland and Ireland, the maxim yields to specific priority and registration regimes (for example, land registration, land charges and company charge filings) and to doctrines such as the bona fide purchaser for value without notice defeating earlier equitable interests. Priority can also be affected by tacking, subrogation, estoppel, laches and agreed contractual priority arrangements. In Scotland, the same idea is captured by the phrase prior tempore, potior jure and underpins the ranking of real rights and diligences; timing is assessed by completion/perfection (typically registration or delivery), not mere agreement. Across all jurisdictions, prompt registration, perfection and priority searches are essential to secure priority.