Dhana Yoga in astrology refers to combinations or configurations of planets in a birth chart that indicate wealth, prosperity, and financial success for an individual. In Vedic astrology, the term "Dhana" translates to wealth or riches, while "Yoga" signifies a combination or alignment of planetary energies.

The presence of Dhana Yoga in a birth chart suggests favorable circumstances for accumulating material abundance and financial stability throughout one's life. However, the exact formation and effects of Dhana Yoga can vary depending on the specific planetary placements, aspects, and other factors within the chart.

Several planetary combinations contribute to the formation of Dhana Yoga. Some of the most significant combinations include:

1. Lakshmi Yoga: This yoga occurs when the lord of the 9th house (house of fortune) is in conjunction with or aspects the lord of the 1st house (self) or the lord of the 10th house (career). It indicates abundant wealth and prosperity bestowed upon the individual through blessings or favorable actions in past lives.

2. Mahalakshmi Yoga: When the lord of the 9th house is placed in its own sign or exalted and forms a strong relationship with the Ascendant lord or the 10th house lord, it signifies immense wealth, financial growth, and success in endeavors related to career and business.

3. Gajakesari Yoga: This yoga occurs when Jupiter (planet of wisdom and expansion) is in a strong position either in Kendra (angular houses) from the Moon or in a quadrant from the Ascendant. It indicates wealth, success, and prosperity with a touch of wisdom and benevolence.

4. Dhana Yoga by Planetary Placements: Certain combinations of planets in specific houses can also indicate Dhana Yoga. For instance, the placement of Jupiter, Venus, or Mercury in the 2nd, 5th, 9th, or 11th houses, especially in their own signs or exalted, can enhance wealth accumulation and financial gains.

5. Raja Yoga with Financial Significance: Raja Yoga formed by combinations involving wealth-indicating houses (2nd, 5th, 9th, and 11th) and their lords can also lead to Dhana Yoga. These combinations signify both material prosperity and overall success and influence in life.

It's important to consider the strength and beneficence of the planets involved, as well as any adverse influences that may affect the Dhana Yoga. Additionally, timing factors such as planetary periods (dashas) and transits play a significant role in manifesting the potential of Dhana Yoga in a person's life. Consulting with a knowledgeable astrologer can provide deeper insights into an individual's Dhana Yoga and its implications for their financial well-being.