Of all the classical pairings, tiger and pig compatibility sits near the top. Tiger (寅 Yín, Wood) and Pig (亥 Hài, Water) form a six-combination (六合 liùhé), the tightest of the branch bonds — binding, cooperative, the kind of pairing old texts describe as two branches that lock together. There is no clash, harm, or punishment here. The plain reading: an unusually smooth fit where each partner seems to complete a sentence the other started.
How the six-combination works here
A six-combination is a merging bond, not merely an alliance. The two branches want to fuse into one working unit. What makes this pair sweet rather than sticky is the element line running through it: Water feeds Wood. Pig’s Water nourishes Tiger’s Wood the way a river feeds a growing tree. One partner naturally gives; the other naturally receives and grows from it.
In Ba Zi (八字 bāzì) that generative current is generous by nature, and generosity needs limits. Pig tends to pour — support, patience, resources — and Tiger, always reaching forward, tends to draw. Left unspoken, the giver can quietly empty out while the taker never notices the tap was running.
What the bond gives, and what it costs
The strength scenario is the one the old texts had in mind. The Tiger, so often braced against the world, drops its guard with the Pig alone; the Pig, so often taken for granted elsewhere, is fiercely championed by its Tiger. The combination gives them a default of mutual cover — each instinctively takes the other’s side first and asks questions later — and the Water-feeds-Wood current means the Tiger genuinely flourishes on the Pig’s care. Outsiders describe these couples as effortless. The couple usually agrees, though the honest ones add that the effortlessness is itself the thing to keep an eye on.
The cost scenario is what a merging bond does quietly. Because agreement comes easily, the two can fuse into a single unit with a single social circle, a single set of ambitions — the Tiger’s — and a single caretaker, the Pig. No one fights; something still narrows. Years on, the Pig may struggle to name a friendship or project that is purely its own, and the Tiger may discover it has never once been the one who poured. Neither noticed the drift because drift in a combination feels like harmony. The tell is a Pig who cannot answer “what do you want?” without referencing the Tiger.
One question deserves a straight answer: is this the best match a Tiger or Pig can make? At the year-branch level, yes — the Six Combination is the strongest bond the classical table records for either animal. But the year table ranks branches, not people. A Tiger–Pig pairing with mismatched day pillars will still work harder than a “lesser” pairing whose full charts genuinely feed each other, which is why the honest ranking is always done chart to chart.
Making it work
The particular danger of a combination this strong is fusion. When two people fit this well, they can stop being two people — decisions blur, individual ambitions dissolve into a shared one, and neither notices the loss until it aches. Guard some separateness on purpose: your own friends, your own projects, your own opinions kept sharp.
Then mind the flow of giving. Make Pig’s support visible and reciprocated, not assumed. Tiger should check, out loud and often, that the nourishment is being replenished and not simply consumed. A river that is never allowed to refill runs dry, and this is the one way an otherwise easy bond turns sour.
Confirm it at the day branch, where marriage actually lives
A six-combination between year animals is the best headline the zodiac prints — and it is still a headline. The year branch is one of eight characters, the one tied to background and generation. The seat that Ba Zi consults for marriage is the day branch, the spouse palace beneath your Day Master. A 寅–亥 combination there, between your two day branches, is worth far more than the same bond between the years; and a clash between the day branches can put real turbulence under an apparently charmed year-level match.
The check takes minutes: cast both charts on the compatibility calculator, read the branch under each day stem, and compare the pair using our day branch compatibility guide. A full comparison then weighs what no branch table can: the ten-god relation between your Day Masters, whether the Pig’s Water is the element the Tiger’s chart is thirsty for or already awash in — the difference between medicine and flood — and the luck pillars that time each chart’s strongest decades. A combination confirmed at the day branch, with elements that feed both charts, is about as good as this craft’s news gets.
The honest caveat
Animal matching reads a single character — the year branch — out of the eight in a full chart. It is one line, not the story. Two people born in Tiger and Pig years still carry different day masters, different hours, different hidden stems, and those decide far more about a partnership than the trine on the surface.
Real compatibility is chart-to-chart. The spouse palace in each chart speaks to partnership with a precision the zodiac cannot, and our compatibility guide lays out how two charts genuinely interact. For each animal in full, see the Tiger compatibility hub and the Pig compatibility hub.
If you would rather read the charts than the folklore, bring both dates to a reading: an hour, two charts side by side, and a written account of where you truly reinforce each other and where the giving runs one way.