Why Traditional Rules Fall Short
For decades, financial advice has revolved around the 'income replacement' rule, which suggests you'll need about 70-80% of your pre-retirement income to live comfortably. While a decent starting point, this method has flaws. It doesn't account for your unique
lifestyle or how your spending habits will fundamentally change. For instance, your income includes money you might be putting towards savings, large EMIs for a home loan that will be paid off, or work-related costs like commuting. These will not be part of your retired life. Relying on a generic percentage of a salary you will no longer earn can lead to either over-saving in a panic or, worse, under-saving and facing a shortfall.
The Power of Your Present Spending
A far more realistic approach is to build your retirement plan based on your current expenses. Your present spending is the most honest reflection of the lifestyle you maintain. It’s a real number, based on your actual habits, not a theoretical percentage. By understanding where your money goes today—from housing and food to travel and entertainment—you create a personalised baseline. This method shifts the focus from a vague income target to a tangible lifestyle goal. You are not trying to replace your salary; you are trying to fund your life, and your current expenses provide the clearest blueprint for what that life costs.
A Step-by-Step Guide to Finding Your Number
The first step is the most crucial: track your spending. For one to three months, meticulously record every expense. Use an app, a spreadsheet, or a simple notebook. The goal is to get an accurate monthly average. Once you have this, categorise your expenses into three buckets: 1. Essential Expenses: These are your needs, such as housing, utilities, groceries, and basic transport. 2. Discretionary Expenses: These are your wants, like dining out, hobbies, travel, and entertainment. 3. Expenses That Will Disappear: This includes costs like EMIs that will be fully paid, children's education fees, and work-related expenses. Subtract the expenses that will disappear from your total monthly average. The resulting figure is your core lifestyle cost in today’s money. This is your foundational number.
Adjusting Your Base for the Future
Your lifestyle cost is the starting point, not the final answer. Now, you need to make adjustments for how life will change in retirement. Some costs may decrease, but others will likely rise. For example, you may spend less on commuting but more on travel and hobbies. The most significant cost to plan for is healthcare. As you age, medical expenses tend to increase at a rate faster than general inflation, so it's critical to factor in a substantial budget for insurance premiums and out-of-pocket costs. You should also add a buffer for unforeseen events and one-time expenses. Finally, and most importantly, you must adjust this entire number for inflation. An expense of ₹50,000 per month today could easily require over ₹1.2 lakh per month in 15 years, assuming a 6% inflation rate.
From Monthly Need to Retirement Corpus
Once you have an inflation-adjusted monthly expense figure for your first year of retirement, you can estimate the total corpus you need. A common guideline used by financial planners is the '4% Rule'. This suggests that you can safely withdraw 4% of your total retirement corpus in the first year, and adjust that amount for inflation each subsequent year, with a reasonable expectation of your money lasting for about 30 years. To get a rough estimate of your target corpus, you can multiply your projected annual expenses by 25. For example, if you estimate you'll need ₹12 lakhs in your first year of retirement (₹1 lakh per month), you'd need a corpus of approximately ₹3 crores. This provides a clear, actionable savings goal to work towards.
