Which house system to choose

What houses actually do

Planets in signs tell you what kind of energy you have. Houses tell you where in life it plays out: money, relationships, career, home, children. The border between houses is called a cusp, and different systems draw those borders differently.

That’s why the same planet lands in the 9th house in one system and in the 10th in another. The argument about systems has run for centuries and won’t end.

Each in brief

• Placidus — today’s most widespread. Divides by the time degrees take to cross the horizon. Gets temperamental at high latitudes.
• Koch — similar to Placidus but built from the birthplace. Popular in the German school.
• Equal — exactly 30° per house from the Ascendant. Simple, stable, works well in the north.
• Whole Sign — the oldest: house equals sign. Coming back into fashion with Hellenistic astrology.
• Porphyry — trisection of the quadrants, simple geometry, a calm compromise.
• Regiomontanus — the medieval classic, still standard in horary astrology.
• Campanus — divides the celestial sphere by verticals; rare, but with loyal admirers.

How to choose without expertise

Simple rule: take the system your trusted school works in. Learning from modern mainstream textbooks — Placidus. Drawn to the ancients — Whole Sign. Born near or beyond the polar circle — Equal or Whole Sign; they don’t break up there.

You can compare

Nothing stops you from viewing the chart in two systems and seeing where the borders diverge. A planet sitting near a cusp «floats» between houses — which is itself a diagnosis: a theme on the boundary between two areas of life.