Term insurance premium goes up mainly because the risk for the insurance company goes up as you get older. A 25-year-old is much less risky to insure than a 35- or 40-year-old, so the later you buy, the more you pay every year for the same ₹1 crore cover.
Premiums also increase if your health is not good (BP, diabetes, obesity), if you smoke, or if you add extra features like critical illness or return of premium. Sometimes, companies increase rates for everyone because they are getting more death claims than expected or because reinsurers/IRDAI rules change.
Simple Reason
What it Means in Real Life
Effect on Premium
You get older
Buying at 35 instead of 25
Much higher rate for same cover
Health & habits
Smoking, illness, overweight
Extra loading added
More features
Riders, return of premium
Cost increases
Market changes
More claims, rule changes
Company revises prices up
If you want cheaper term insurance, buy early, stay healthy, and only choose the riders you really need.