To Town Portal or Not to Town Portal?

As of patch 6.87, the cost of Town Portal Scroll has been reduced to 50 gold which make the answer to this question yes. If you have the gold then TP back to the lane. There are only two things you should concider before porting back to the lane :

• Do I risk to die within 60 seconds upon arrival ? If the answer is yes then you shouldn't probably TP there (at least alone).
• Will my help be needed in another lane within the next minute ? If yes then you should walk back to your lane and be ready to TP to the other lane.