Retirement planning is difficult, and that’s why one needs to have an estimate of the amount they will spend when retired. One needs to create a corpus equivalent to the desired lifestyle, and for this, having an estimate becomes mandatory. Some experts believe in using the rule of thumb where you will spend 20 per cent less in retirement than they spend in their working years. Estimate what you would spend at the peak of your expenses in a given year and slash 20 per cent off it. This will provide you with a spending estimate in the future. Things to consider while estimating: current age, prospective retirement age, life expectancy, monthly expenses (example- house rent, utility bills, house help salaries, shopping and dining, healthcare, vacations). You also need to consider marriage, kids, and other dependents that you are financially responsible for now or will be in the future. Don’t forget to factor in the inflation rate while creating a post-retirement corpus.