Most people check Chinese compatibility by comparing year animals. Rat plus Dragon: good. Rat plus Horse: bad. That is the elevator pitch version. The real system, used by professional BaZi practitioners for over a thousand years, looks at four pillars instead of one and asks a richer question: how do all eight characters of one chart interact with all eight of another?
What this page is
A complete map of how BaZi practitioners actually read compatibility between two charts — the four layers they check, the elemental cycles they trace, and the specific branch interactions that mark friction or harmony.
Where to start
Generate your own chart with the BaZi Calculator first. Then jump to the section below that matches your question: element pairs, branch clashes, or branch harmonies.
Why Year-Animal Matching Is Not Enough
Year-animal compatibility groups roughly 130 million living people born in the same year into one bucket. Useful as a first filter; not useful for actually understanding a specific relationship. Two Tigers can be radically incompatible if their Day Masters clash, and two people whose year animals "should not" match can have deeply harmonious BaZi charts because the rest of their pillars produce each other.
BaZi compatibility uses the full Four Pillars chart for both people: year, month, day, and hour. That is sixteen total characters in play instead of two. For the broader comparison between systems, see BaZi vs Chinese Zodiac.
What BaZi Compatibility Actually Examines
A real BaZi compatibility reading checks four distinct layers, each answering a different question about the relationship.
Day Master
Most importantYour Day Master is the Heavenly Stem of your Day Pillar — your core self. How your Day Master interacts with your partner's is the foundational dynamic of the partnership. Yang Wood and Yin Earth, for example, is a productive control relationship.
Five-Element Balance
HighBeyond Day Masters, the overall element balance of each chart matters. Charts that complement each other's deficiencies tend toward harmony. Charts dominated by the same element amplify each other — sometimes great, sometimes claustrophobic.
Earthly Branch Interactions
HighThe twelve animals are the Earthly Branches. They interact through six clashes, six harmonies, four three-harmony triangles, and subtler punishment patterns. Day-branch interactions matter most for romantic compatibility.
Spouse Palace
ContextualThe Day Branch is traditionally called the Spouse Palace. Its element and animal describe what you naturally seek in a partner. Practitioners watch how each person's Spouse Palace interacts with the other's Day Master.
The Two Five-Element Cycles
The five elements interact through two main cycles. Both have a place in good compatibility — the producing cycle generates, the controlling cycle keeps energy from running away with itself.
When you compare two BaZi charts, the dominant element of one chart compared to the dominant element of the other tells you which cycle the relationship sits in. Wood-Fire couples sit in the producing cycle; Wood-Earth couples sit in the controlling cycle. Neither is "better" — they describe different relationship dynamics.
How the Twelve Animals Interact
The twelve Earthly Branches (the animal signs) have specific interactions BaZi practitioners track carefully. Here is the quick reference:
| Pattern | Pairs | What it means |
|---|---|---|
| Six Clashes | Rat ↔ Horse, Ox ↔ Sheep, Tiger ↔ Monkey, Rabbit ↔ Rooster, Dragon ↔ Dog, Snake ↔ Pig | Branches sitting 180° apart on the wheel. Mark dynamic friction — opposing rhythms, conflicting instincts, contrasting needs. |
| Six Harmonies | Rat & Ox, Tiger & Pig, Rabbit & Dog, Dragon & Rooster, Snake & Monkey, Horse & Sheep | Pairs whose energies combine well. Mark complementary support — one fills what the other lacks. |
| Three Harmonies | Rat-Dragon-Monkey, Ox-Snake-Rooster, Tiger-Horse-Dog, Rabbit-Sheep-Pig | Trios forming stable triangles. Strong group compatibility — useful for friendships and family alignments. |
| Punishments & Harms | Various subtler patterns | Recurring stress points that surface as repeated friction. Less dramatic than clashes but persistent. |
What a Reading Can and Cannot Tell You
What a reading can do
Give you a vocabulary for the relationship's actual dynamics. Why a certain partner feels grounding versus draining. Why specific arguments keep recurring. Where the natural flow lives and where the friction lives. That is real, observable, and useful.
What a reading cannot do
Predict outcomes. Two charts with high BaZi compatibility can fall apart if the partners do not show up. Two charts with challenging BaZi can build something durable when both partners do the work. Compatibility describes the terrain, not the journey.
For a different cultural lens on the same question, you can also look at Western synastry, which uses planet positions and aspects rather than elements and pillars. The two systems often agree on the broad strokes, even when the language is completely different.
Explore Specific Compatibility Patterns
The pages below cover the core patterns BaZi practitioners check. Read whichever matches your own chart, or browse to learn the system.
Element Pairs — Producing Cycle
Generative, supportive pairingsElement Pairs — Controlling Cycle
Tension, balance, structural frictionThe Six Branch Clashes
Direct opposites — built-in dynamic tensionThe Six Branch Harmonies
Complementary pairings — natural supportSpecific Scenarios & Day Master Pairs
Targeted answers to common questionsSee Your Own BaZi Chart First
Before comparing two charts, generate your own. The calculator gives you all four pillars, your Day Master, and your element balance — the foundation for any compatibility reading.
Try the BaZi CalculatorCommon Questions About BaZi Compatibility
What is BaZi compatibility?
BaZi compatibility is the analysis of how two people's BaZi charts interact across all four pillars. It looks beyond the basic Chinese zodiac year animal to examine how each person's Day Master, element balance, and earthly branches relate to the other person's.
Is BaZi compatibility the same as Chinese zodiac compatibility?
No. Chinese zodiac compatibility uses only the year animal, so it groups everyone born in the same year into the same compatibility profile. BaZi compatibility uses the full birth chart, so two people born in the same year but different months and hours can have completely different compatibility readings.
Which pillar matters most for BaZi compatibility?
The Day Pillar matters most because the Day Master represents your core self. How your Day Master interacts with your partner's Day Master is the single most important factor. The Day Branch (the Spouse Palace) is the second most important.
Can a BaZi compatibility reading say a relationship will fail?
No. BaZi compatibility describes natural dynamics — where charts produce harmony, where they generate friction, what each partner brings to the relationship. Friction is not the same as failure. Many durable, happy relationships have challenging BaZi compatibility because the partners do the work to navigate the friction.
Do I need exact birth times for BaZi compatibility?
Birth times help but are not strictly required. The Day Pillar is determined by the date alone. The Hour Pillar requires a birth time, and without it, the reading is still about 75% complete for compatibility purposes.