Everything you own minus everything you owe. Bank balances, investments, EPF, property value, gold, minus any loans, credit card debt, or money you have borrowed. This single number is the most honest snapshot of where you actually stand. It does not need to be large. It needs to be moving in the right direction every year. If you have never calculated it before, the number might surprise you in either direction.

The absolute minimum you need to get through a month if everything nonessential stopped. Rent, groceries, electricity, transport, phone, loan EMIs. Not your normal spending. Your floor. This is the number your emergency fund is built around. If you do not know it, you do not know how many months your savings can actually carry you, which means you are guessing at the single most important buffer in your financial life.

Take whatever liquid savings you have (not investments, not FDs with penalties, not gold you would need to sell). Divide by your monthly survival number. That is how many months you can last without income. The standard recommendation is 3 to 6 months. Most people who have not checked assume they have more runway than they actually do, because they are dividing by their normal spending rather than their survival floor.

The percentage of your take-home salary that actually gets invested or saved each month. Not what you plan to save. What actually leaves your spending account and moves somewhere it grows. Include your SIP, your recurring deposits, your EPF contribution. Exclude anything you dipped into during the month. If this number is zero, everything else on this list is theoretical. If it is above 15%, you are ahead of most people your age. The number itself matters less than whether it is going up each year.

A three-digit number between 300 and 900 that determines the interest rate you will pay on every loan and credit card for the rest of your life. Above 750 is good. Below 650 is expensive. The difference between a 7.5% home loan rate and a 9.5% rate on a Rs 50 lakh loan over 20 years is roughly Rs 12 lakhs in extra interest. Checking your score is free, takes two minutes, and does not affect it. There is genuinely no reason not to know this number.

Not the headline number your app shows you. Not “you have earned Rs 30,000.” Your XIRR, which is the annualised return adjusted for when each instalment actually went in. This is the only honest measure of whether your SIP is actually working or just running on autopilot. Most investment apps show this somewhere if you look for it. If yours does not, that tells you something about the app.

If you have dependents, the question is simple: how much would they need if your income disappeared tomorrow? Multiply your annual expenses by 10 to 15. That is a rough coverage target. Now subtract whatever term insurance you actually hold. The gap is the number. If you do not have term insurance at all, the gap is the entire number. Health insurance works the same way: what is your current sum insured, and would it actually cover a serious hospitalisation in your city? If the answer makes you uncomfortable, that is the number doing its job.