Mars in the 12th gives high expenses, hidden enemies and disturbed sleep, but also capacity for work abroad or in hospitals. It is counted for Manglik dosha.
What the 12th house governs
The 12th house, Vyaya bhava, covers expenses, losses, foreign lands, sleep, isolation, charity and liberation. It is a dusthana (difficult) house, linked with obstacles that build resilience.
What Mars brings
Mangal, Mars, is the commander. It gives courage, energy and the drive to act, and is central to Manglik dosha in marriage matching.
What changes the result
- Sign and dignity: Mars exalted or in its own sign gives the best version of this placement; debilitated or in an enemy sign, the weaker version.
- House lordship: which houses Mars rules for your Lagna decides whose matters it carries into the 12th house.
- Aspects and conjunctions: Jupiter's aspect protects; Saturn, Mars or Rahu add pressure.
- Dasha: the placement shows most strongly during Mars's own Mahadasha or Antardasha (7-year Mahadasha).