Rahu in 7th House. 

So, lets see what Rahu can do in 7th house without any conjunction or aspect from any other planet. 1st lets see what these 2 things represent - 

Rahu represents illusion, foreign lands, foreign things (foreign as in unknown things. So, for someone living in Punjab, culture and rituals of Kerala is also unknown and hence Foreign), Drugs, Medicines, any type of intoxication, fame, wealth, success, obsession, past-life left-over karma, movies, television, online world, cheating, imagined fears, unusual things, unique things, creativity, rule breaker. Rahu also blows things out of proportions. 

7th house is house of market place, other people (masses), business partnerships, agreements, marriage, spouse, marital happiness etc.

Aspect-wise, in Vedic Astrology, Rahu has 5th and 9th house aspect. He is unable to impact 7th house from its place as Ketu is sitting there, which is the other axis of Rahu and represents all those things which are non-Rahu. 

So, when Rahu comes into 7th house of business and partnerships, it makes a person very good businessman. These people can do anything to get success in business. As 7th house is also house of masses and public, so here Rahu gives extreme fame to person. In relations, the person never gets satisfied with their partner, they will have one or the other desire left to be fulfilled. This can also show that someone has foreign spouse or getting married in foreign lands. As Rahu is significator of 2nd marriage and if there is no other benefic aspect on 7th house, it can lead to persons 2nd marriage. Also, this placement can lead to infidelity in relations.

From 7th house, Rahu aspects the 11th house & 3rd house with its 5th & 9th aspect. As 3rd house, 7th house and 11th house are all related with business, it shows that they are very much born to do their own work. It also shows the need to learn about business and how to run it for common benefit of all. 

Thanks,

Swami Premanand Bharti