Natal Mars in the 12th House

Natal Mars in the 12th house can be a rather disturbing or even dangerous placement, as its presence here indicates difficulties in expressing one’s anger and aggressive emotions. This can have as a result violent explosions when the oppressed energy reaches a critical level, and people with such an aspect must definitely learn techniques of anger-management.

A twelfth house Mars indicates that the native can have been bullied as a child, or even be a victim of physical attacks. Even if this did not actually happen, the nature of the 12th house can have brought to the individual a lot of fears concerning physical violence. As a child, he may have been frequently afraid of being beaten by other children or even his parents. This placement can create traumas or even make the native feel like a coward. These fears of being bullied without being able to properly retaliate build a pattern of preferring to flee rather than fight, mostly due to insecurities related to the outcome of the fight. The native is afraid of being defeated and will often avoid conflicts even with a less powerful opponent, just to be sure that he will not lose.

Also, during the childhood years, expressing anger was being kind of forbidden. The native’s parents and other people surrounding him were not tolerating powerful outbursts of the child, which in turn was leading him to have introversive implosions rather than a healthy direction of possible negative emotions. Holding those feelings inside definitely brings feelings of restlessness, and such repressing tendencies either make him burst when anger reaches a threshold or (in more difficult situations) bring a lot of self-undoing and auto-destructive actions.

On the other hand, Mars placed in the 12th house can give a lot of power connected with the occult fields. The individual can channel his energy into studying and understanding the spiritual realms, and dedicate quite a lot of effort. Usually, as Martial energy brings actions, the individual will not only theoretically study the occult but also get involved in its practice. In case that Mars is adversely aspected, especially by “malefics” such as Pluto and Saturn, the person is advised to stay away from magickal practice because he can both create a lot of hidden enemies but also hurt other people and himself. A badly aspected Mars shows that he has no firm control of his energy and violent emotions, and thus he can even cause conscious malice to others when his wrath or hatred go beyond control.

A person with natal Mars in the 12th house is strongly advised to strengthen its function, and the best way is by indulging into an active life. Sports, martial arts and all activities that empower the body can heal the native’s self-confidence, providing to Mars the necessary energy, and especially the necessary channels for it to flow outwards. In addition, such a native should battle his fears of anger expression and allow such outbursts. Even the fact of de-demonizing them will have a positive effect, as he will no longer struggle by burying such emotions deep in his psyche.
In some situations, the newborn individual may have experienced pain during childbirth. This can, in turn, make him feel that the world outside of his mother’s womb is violent and threatening. If Mars is adversely aspected, the individual can develop fears and paranoia concerning war and mass calamities. Indeed, Mars in the 12th house is not the best placement for such events, especially if it is located near the Ascendant. A twelfth house Mars person should try to keep away from guns, wars, demonstrations and sharp machinery, as there are quite a lot of possibilities to have an accident.

Mars in the 12th house can indeed bring hidden enemies, especially males. But what is more frequent to happen is phobias about having hidden enemies, even if they do not exist. Actually, the appearance of some real enemies among friends will make the native cautious in his approach, always searching for hidden behaviors in other people near him. Being backstabbed in the past makes him want to prevent that to happen again, so he will often even become paranoiac, imagining hidden tactics in other people’s movements. In addition, his alert makes him always ready to strike first, and there are quite a lot of possibilities that he will accidentally hurt someone just because of fear of being hurt.

As the 12th house is connected with social institutions, the native may have some involvement with prisons, hospitals or monasteries. If Mars has positive aspects, the native may gain quite a lot of experience from working on such projects in institutions of restriction. On the other hand, difficult aspects can indicate bad luck with those, so a native is firmly advised to keep far from any criminal activity as it may bring a legal trouble and possibilities of imprisonment. Seriously, with a 12th house Mars, the risks of getting caught are quite big, as also the chances of betrayal from a friend who is a snitch. Stay clear of anything illegal.

Each planets have a different effect on you, depending on which house and sign they reside in. In order to find out where they are located in your natal chart, you can use our free birth chart generator. Also, examine the aspects that they form with other planets in your chart. You will understand a lot more about the detailed role that they have in your horoscope.

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Xaos is the author of all astrological articles available on The Astro Codex.

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As someone with Mars in Leo in the 12th house, this is accurate but very depressing. Not much positive about this placement.


Ugh same!!!!! I hate it!!

Julio Nerys

Great information about possible manifestations of the Mars in 12th…some apply pretty spot on personally. Adding a bit to the info, I have seen that I act out subconscious aggressive behaviors and have to catch myself. Body language and the WAY I say things are sometimes not aligned with what my rational easy going part of my nature.
Thanx Xaos, great work…will look into to how relating with institutions like jails, monasteries , etc… can be a win win blessing in this Dharma.


Does anyone have a Mars in Gemini in the 12th house?


I do. It’s been hard, but things are looking up now. I was abused, gossiped about and lied on a lot. It brought a lot of slander. Check your progressions to see if Mars is still in your 12th house. Let me ask you, what was your mother’s father like? I will say why I asked if you respond and hopefully you do. Thanks


My mothers father was abusive.

I have this aspect and have similar experiences.