Sun in the 6th House: Meaning and Tendencies
What Sun signifies
Sun is the kāraka of ātma (the soul), vitality, authority, the father, and one's sense of dignity and purpose (BPHS Ch. 3 (Graha significations); Phaladīpika Ch. 2). Sun's signification travels wherever Sun sits. In the 6th house, Sun meets debts specifically — the pairing this page is about, house by house across every one of Sun's twelve placements. One more constant travels with Sun into every house: classically Sun is a natural malefic (pāpagraha), so a Sun placement is read for the strength and heat it brings, not automatic ease.
What the 6th house governs
The 6th bhāva is classically read as the house of debts, disease, rivals, disputes, service, and competition. By quadrant, the 6th house is an apoklima (cadent) house: BPHS's shadbala gives apoklima houses the least of the three classes' positional strength (sthāna bala). That quadrant strength is the 6th house's starting baseline. Its own sign and its lord shape debts first; anything aspecting the 6th house adds more on top. Sun enters this picture only after that baseline is already set.
Sun in the 6th house
When Sun occupies the 6th house, Sun's significations — ātma (the soul), vitality, authority, the father, and one's sense of dignity and purpose — express through debts, disease, rivals, disputes, service, and competition. Because the 6th house is apoklima, results here tend to read as less immediately visible — the way apoklima results classically show. Sun does not override the 6th house's own quadrant nature; it colours it. The sign the 6th house falls in for you, Sun's own dignity there, and what aspects the 6th house all decide how this actually plays out.
This house's own significator
The 6th house's own naisargika kāraka (BPHS 32.34) is Mars — not Sun. So the 6th house is read through two grahas at once: Sun, sitting here, and Mars, who owns it by nature. Debts in the 6th house leans on both — Mars's own placement completes what Sun alone cannot say.
How to read this
Sun in the 6th house is a classical tendency, not a verdict — read it that way. What actually decides how debts plays out: the sign the 6th house falls in for you. Also decisive: what aspects the 6th house, and whether a Sun daśā or antardaśā is running for you right now. A page about the 6th house in general cannot see either of those two things — your own chart, with your real 6th house, can.