Personal Finance — Key Concepts and Q&A

Core Concepts

Q: The 50/30/20 budgeting rule.

Simple framework for allocating take-home income:

Indian context adjustments:

Many financial experts suggest 40/30/30 or even 30/30/40 (higher savings) given lower social security net in India vs Western countries.

Zero-based budgeting: assign every rupee a job. Total income - total budget = 0.

Q: Emergency fund — how much and where to keep it.

What: 3-6 months of essential expenses in liquid, safe savings.

Why: Prevents going into debt for unexpected events (job loss, medical emergency, car breakdown). Allows career decisions from strength not desperation.

How much:

Where: Liquid fund or high-yield savings account. NOT in stocks — must be accessible immediately without risk of market loss. Prioritise this before investing.

Q: Debt management — good debt vs bad debt.

High-cost bad debt (tackle first):

Avalanche method: Pay minimum on all. Extra payments on highest interest rate first. Mathematically optimal.

Snowball method: Pay minimum on all. Extra on smallest balance first. Psychologically motivating.

Good debt (used wisely):

Debt-to-income ratio: Monthly debt payments ÷ monthly gross income. Keep < 36%. > 50% = financial stress zone.

Q: Investing basics — the power of compounding.

Einstein: "Compound interest is the eighth wonder of the world."

₹10,000 invested at 12% annually:
After 10 years: ₹31,058
After 20 years: ₹96,463
After 30 years: ₹2,99,599 (30x original!)

Rule of 72: Years to double = 72 ÷ return rate
At 12%: doubles in 6 years
At 8%: doubles in 9 years

SIP (Systematic Investment Plan): Invest fixed amount monthly in mutual fund. Rupee cost averaging — buy more units when markets fall, fewer when high. Discipline > timing.

Asset allocation by risk: 100 - Age = equity % (rough guide). 30-year-old: 70% equity, 30% debt.

Tax-advantaged accounts (India):

Q: Insurance — what you must have.

Term Life Insurance: Pure protection. High cover (10-20x annual income), low premium. Only if dependants rely on your income. Do NOT mix with investment (avoid endowment/ULIPs).

Health Insurance: Medical expenses are the #1 cause of financial ruin in India. Minimum ₹5 lakh cover, ideally ₹10-15 lakh per person. Include parents separately (higher premium, pre-existing conditions). Don't rely solely on employer insurance (loses with job).

Critical Illness: Lump sum on diagnosis (cancer, heart attack, stroke). Covers non-hospitalisation costs (lost income, modifications, ongoing treatment not covered by health plan).

Not essential (for most people): Endowment, ULIPs, accidental insurance with small amounts, mortgage insurance (term insurance covers this better).

Revision Notes

BUDGETING: 50/30/20 rule (needs/wants/savings). Zero-based = every rupee assigned.
EMERGENCY FUND: 3-6 months expenses. Liquid fund/savings. Build before investing.

DEBT:
Bad: credit card (36-42%), personal loans → pay first
Avalanche: highest interest first (mathematical) | Snowball: smallest balance (psychological)
Debt-to-income: keep < 36%

INVESTING:
Power of compounding: ₹10K at 12% → ₹3L in 30 years
Rule of 72: years to double = 72 ÷ interest rate
SIP: monthly investment, rupee cost averaging
Asset allocation: 100-age = equity % (rough)

TAX ADVANTAGED:
PPF: 7.1% tax-free, 80C | ELSS: equity, 3yr lock, 80C | NPS: extra 80CCD(1B) ₹50K

INSURANCE PRIORITY:
1. Term life (10-20x income if dependants)
2. Health insurance (₹10-15L/person, not employer-only)
3. Critical illness
Avoid: Endowment, ULIPs (mix insurance+investment = bad both)