What Is the FIRE Number and How Do You Calculate It?

Example 1 - Regular FIRE in 20 years

Future monthly expense = 80,000 x (1.06)^20 = Rs. 2,56,571. Annual expense = Rs. 30,78,852. FIRE number = 30,78,852 x 30.

Result: Rs. 9.24 crore

This is the corpus needed 20 years from now, not in today's rupees.

Example 2 - FIRE number using today's expenses

FIRE number in today's purchasing power = 12,00,000 x 30.

Result: Rs. 3.60 crore in today's rupees

Useful for understanding the target, but your actual future corpus must be inflation adjusted.

Example 3 - SIP required to reach FIRE

Future value of current corpus = 20L x (1.12)^15 = Rs. 1.09 crore. Remaining target through SIP = Rs. 3.91 crore.

Result: Required SIP is about Rs. 78,000/month

A 10% annual step-up SIP can reduce the starting monthly amount significantly.

What is a FIRE number?

Your FIRE number is the amount of invested assets you need before work becomes optional. If your portfolio can reasonably fund your annual expenses for life, you are financially independent. The simplest formula is annual expenses divided by safe withdrawal rate. With Rs. 12 lakh annual expenses and a 4% withdrawal rate, the FIRE number is Rs. 3 crore.

Is the 25x rule enough for India?

The 25x rule is a useful starting point, but many Indian planners prefer 30x to 40x. India-specific risks include higher healthcare inflation, education costs, uneven social security, currency risk for foreign spending, and potentially longer retirement periods if you retire in your 30s or 40s.

Should I calculate FIRE using current expenses or future expenses?

Use both, for different purposes. Current expenses multiplied by 30 tells you the target in today's purchasing power. For the actual corpus you need at retirement, inflate those expenses to your retirement year first, then apply the multiplier.

Does my own house reduce my FIRE number?

A fully paid house can reduce retirement expenses because rent is removed. But it does not eliminate housing costs. You should still budget for maintenance, repairs, society charges, property tax, insurance, and periodic upgrades. If your house is too large or in an expensive area, those costs can be meaningful.

Can I include EPF, PPF, NPS, and gratuity in my FIRE corpus?

Yes, but separate accessible assets from locked or purpose-specific assets. EPF, PPF, NPS, gratuity, and retirement benefits are part of net worth, but withdrawal rules and tax treatment differ. FIRE planning works best when you map when each asset becomes available.

What return assumption should I use for FIRE planning?

Use conservative real assumptions. Many people model 10% to 12% nominal equity returns before retirement and lower blended returns after retirement depending on asset allocation. What matters most is the gap between returns and inflation. A 10% return with 6% inflation is a 4% real return.

What is sequence of returns risk?

It is the risk that markets fall sharply in the first few years after you retire. Early losses combined with withdrawals can permanently damage the corpus. This is why FIRE plans use cash and debt buckets, conservative withdrawal rates, and flexibility to reduce spending during bad market years.

Is FIRE only for high-income people?

High income helps, but FIRE is mainly a savings-rate game. Someone earning Rs. 1.5 lakh/month and saving 60% may reach independence faster than someone earning Rs. 4 lakh/month and saving 15%. The formula rewards the gap between income and lifestyle cost.