Reason 3: Earn some extra income

When you write a book and publish it (through a traditional publisher), you get a regular income from royalty. Depending on the publisher and the terms of your contract, you will get these returns every three to six months, or on an annual basis. In India, royalty income up to Rs 300,000 is deductible from income tax (Section 80QQB)! When you have a day job and are earning a regular salary, this royalty becomes a secondary income (and any extra cash is always welcome, right?).