Ox and Pig compatibility is a calm, unforced pairing at the level of the branches. There is no Six Combination (六合 liùhé) binding them and no clash, harm or punishment between them. The Ox (丑 chǒu) is an Earth branch and the Pig (亥 hài) a Water branch, so the branches ask you to read this pair by its elements rather than by any headline aspect — no major classical aspect, as the tradition puts it, so read the pairing by its elements, not by drama.
The absence of an aspect is genuinely good news for people who dislike drama: nothing in the calendar pushes these two toward conflict or fuses them together. They meet on open ground.
The mechanics: Earth steering Water
The one active current is a controlling one, though it runs gently here. In the five elements (五行 wǔxíng), Earth governs Water — Earth gives Water banks and direction. Between an Ox and a Pig, the Ox’s grounded steadiness offers structure to the Pig’s easy, flowing, generous nature.
Read well, that is a kindness: the Pig’s warmth and sociability find shape and follow-through in the Ox’s reliability, and the Ox’s seriousness is softened by the Pig’s good humour. Read badly, Earth controlling Water tips into containment — the Ox managing or dampening the Pig’s spontaneity until the Pig feels boxed in. The dynamic is healthy as structure and corrosive as domination, and the difference lies in how lightly the Ox holds the reins.
Making it work
With no aspect forcing anything, this pair is free to shape its own terms, and the work is keeping structure in service of the Pig rather than over it. The Ox does best offering steadiness as support, not supervision; the Pig does best giving the Ox the warmth and ease it rarely generates on its own.
They complement more than they compete — the Ox anchors, the Pig softens. What erodes them is not friction but neglect, since nothing compels engagement. A little regular warmth from the Ox and a little follow-through from the Pig keep the Earth-and-Water arrangement flowing kindly. In practice this is one of the more restful pairings the branches describe, provided the Ox resists the urge to over-manage the Pig’s easy generosity and the Pig resists leaning on the Ox to carry every practical burden. Balance the giving and the pairing asks very little upkeep.
Which branch are you actually comparing?
Everything above reads the year branch — the animal of the birth year, which is one character among the eight in a full Ba Zi (八字 bāzì) chart. The year branch speaks to background and outward life. Partnership itself is read from a different seat: the day branch, known as the spouse palace (夫妻宫 fūqīgōng), which sits directly beneath the Day Master and describes the marriage from the inside.
That matters in both directions for a neutral pair like this one. A calm year-level reading can coexist with a difficult day-level configuration, and vice versa. If your day branches happen to be 丑 and 亥, this same gentle Earth-over-Water reading applies at the level that actually governs partnership — a quietly favourable sign. The mechanics of reading that level are covered in our day branch compatibility guide.
The full-chart check, briefly
Two charts side by side answer questions the animals cannot. Do the Day Masters support or exhaust each other? Is each spouse palace occupied by something its owner welcomes? Does the Pig’s Water arrive in a chart that needs moisture, or one already flooded? Does the Ox’s Earth steady a scattered chart, or bury a buried one? Element need, not element identity, is what decides whether this pairing’s current feels like a riverbank or a dam.
Worth checking for this pair specifically: 亥 (Pig) forms a Six Combination with 寅 (Tiger) and belongs to the Wood frame 亥卯未, while 丑 (Ox) combines with 子 (Rat) and belongs to the Metal frame 巳酉丑. Branches elsewhere in either chart can therefore engage either animal and shift the emphasis of the whole comparison. Plot both charts with the free compatibility calculator and the picture stops being two animals and becomes sixteen characters in conversation.
Honest scenarios: strain and strength
The strain scenario for Ox and Pig is rarely a fight; it is an imbalance of labour. The Ox slowly becomes the household’s spine — bills, plans, repairs — while the Pig supplies mood and company. Both may be content for years, until the Ox tires of carrying and the Pig discovers, too late, that comfort was being subsidised. The second strain is social: the Pig’s open-door instincts against the Ox’s preference for a small, quiet circle.
The strength scenario is the mirror image. An Ox who lets the Pig soften its edges lives noticeably better — more friends, more laughter, less grinding — and a Pig with an Ox behind it finally finishes what it starts. Between year branches this reads as an easy friendship; between day branches it is the kind of steady, low-flame match that practitioners quietly approve of.
The honest caveat
Matching animals reads a single one of your eight characters — the year branch, and only that. It is one brushstroke of the portrait. The real marriage indicators live in the day pillar and the spouse palace (夫妻宫 fūqīgōng), which an animal comparison cannot reach.
For the grounded reading, learn how the spouse palace works and follow our Ba Zi compatibility guide (八字 bāzì). The complete animal profiles sit on the Ox compatibility hub and the Pig compatibility hub, and another calm Ox pairing worth comparing is Ox and Monkey.
When one branch stops telling you enough, bring both charts to a two-chart reading — one hour, both charts on the table, and a written summary of where you genuinely fit.