The most common financial planning mistakes in your 20s and 30s are starting to invest late and having no emergency fund. Many also buy too little term and health insurance, or carry credit card debt. Investing only to save tax and stopping SIPs in a fall also hurt. Small, early steps can grow into a large sum by retirement.
Key Facts
- As per AMFI data, monthly SIP contributions reached ₹32,297 crore in August 2026.
- The new tax regime is the default. Under it, income up to ₹12 lakh has zero tax after the rebate (₹12.75 lakh for salaried people).
- From 1 April 2026, Section 80C is Section 123 under the Income-tax Act, 2025. The ₹1.5 lakh limit is the same, but only in the old regime.
- Credit card interest in India usually runs at about 2.5%–4% a month. That is roughly 30%–48% a year.
- Gains above ₹1.25 lakh a year on equity funds held over 12 months are taxed at 12.5%.
Your 20s and 30s are the best years to build wealth. You have time on your side. But this is also when most people make costly money mistakes.
Many young earners in Chennai and across India get their first salary and start spending right away. Some buy a policy because a relative asked. Others wait for a “good time” to invest. These habits look small today. Over 25 years, they can cost you lakhs of rupees.
This guide lists 10 common mistakes. For each one, you get a simple fix you can start this month.
What Are the 10 Biggest Money Mistakes at a Glance?
| # | Mistake | What it costs you | Simple fix |
|---|---|---|---|
| 1 | Starting to invest late | Loses years of compounding | Start a small SIP now |
| 2 | No emergency fund | Forces loans or selling investments | Save 6 months of expenses |
| 3 | Only office health cover | No cover if you change jobs | Buy your own family floater |
| 4 | Too little term insurance | Family left with loans | Pure term plan, 10–15x income |
| 5 | Investing only to save tax | Wrong products, low returns | Pick products for goals first |
| 6 | Credit card and loan debt | 30%–48% yearly interest | Pay full bill every month |
| 7 | No clear goals | Money has no direction | Name each goal and its date |
| 8 | Stopping SIPs in a fall | Misses buying at low prices | Stay invested, review yearly |
| 9 | Ignoring inflation | Savings lose buying power | Invest long-term money in growth assets |
| 10 | No nominee or review | Family struggles to claim | Add nominees, review once a year |
Deepak Gokul has guided families on these choices for over 19 years. He holds the CWM® certification, is NISM-Series-XVII: Retirement Adviser Certified, and is an IRDAI Licensed Insurance Advisor. His firm, Deepak Wealth Framework Pvt Ltd, is AMFI Registered as a Mutual Fund Distributor. The points below come from what young families in Pallikaranai, Chennai and across India ask most often.
Mistakes 1–3: Why Does Starting Late Cost So Much?
1. Waiting too long to start investing
Compounding means your returns also start earning returns. It needs time to work. So every year you wait makes a big difference.
A Systematic Investment Plan (SIP) means you invest a fixed amount every month, instead of a large amount at once. You can start a SIP with a small amount.
Worked example (illustrative only): Priya and Arjun each invest ₹5,000 a month in a SIP. We assume a 10% yearly return. Both stop at age 60.
- Priya starts at 25. She invests ₹21 lakh in total. Her money could grow to about ₹1.71 crore.
- Arjun starts at 35. He invests ₹15 lakh in total. His money could grow to about ₹62 lakh.
Priya put in just ₹6 lakh more. But she could end up with over ₹1 crore more. That is the cost of a 10-year delay. Returns are not guaranteed and will vary.
2. Having no emergency fund
An emergency fund is money kept aside for sudden needs. Think of a job loss, a hospital bill, or a big repair. Without it, people take costly loans or sell investments at a bad time.
A common rule is to keep 6 months of expenses aside. Keep it in a savings account, a fixed deposit, or a liquid fund. A liquid fund is a mutual fund that invests in very short-term debt.
3. Relying only on your office health insurance
Your employer’s group cover ends when you leave the job. It may also be too small for a family. Buy your own family floater policy while you are young and healthy. Premiums are usually lower at a younger age.
In the old tax regime, health premiums can also give a deduction. Please verify the current limits from the Income Tax Department website.
Mistakes 4–6: Are You Protected and Debt-Free?
4. Buying too little term insurance
Term insurance is pure life cover. If you die during the policy term, your family gets a lump sum. It has no maturity value, so the premium is low.
Many young people buy plans that mix insurance with savings. These often give a small cover for a high premium. A common rule of thumb is a term cover of 10–15 times your yearly income. For example, if you earn ₹8 lakh a year, look at ₹80 lakh to ₹1.2 crore of cover. Add your home loan to this number.
5. Investing only to save tax
The new tax regime is now the default. It does not allow the Section 80C deduction. From 1 April 2026, Section 80C is Section 123 under the new Income-tax Act, 2025. It still works only in the old regime.
So check which regime suits you before you buy any “tax-saving” product. An ELSS (Equity Linked Savings Scheme) is a tax-saving equity fund with a 3-year lock-in. It makes sense only if it also fits your goals.
6. Carrying credit card debt and too many EMIs
Credit card interest usually runs at about 2.5%–4% a month. That is roughly 30%–48% a year. No investment can reliably beat that.
For example, an unpaid bill of ₹50,000 at 3.5% a month adds about ₹1,750 in interest in just one month. Always pay the full bill by the due date. Try to keep all your EMIs under a comfortable share of your take-home pay.
Mistakes 7–10: How Do You Stay on Track?
7. Investing without clear goals
“I want to be rich” is not a goal. A goal has a name, an amount, and a date. For example: “₹25 lakh for my child’s college in 15 years.”
Once you know the goal, you can pick the right product. Short goals need safer options. Long goals can use equity funds.
8. Stopping SIPs when markets fall
Markets go up and down. When prices fall, your SIP buys more units for the same money. NAV (Net Asset Value) is the price of one unit of a mutual fund. A lower NAV means more units for you.
Many investors stop their SIP in a fall. Then they miss the recovery. Stay invested and review your plan once a year instead.
9. Ignoring inflation
Inflation means prices rise every year. So ₹1 lakh today will buy less in 10 years. If your money earns less than inflation, it slowly loses value.
Keeping all your savings in a savings account is not safe for long goals. For goals 7 years or more away, think about growth assets like equity mutual funds.
10. Not adding nominees or reviewing your plan
A nominee is the person who receives your money if something happens to you. Add one to every bank account, mutual fund folio, demat account, and insurance policy.
Also review your plan once a year. Update it after marriage, a new child, a new job, or a new loan.
Frequently Asked Questions
What is the biggest financial mistake in your 20s?
The biggest mistake is waiting to start investing. Compounding needs time. Even a small SIP started at 25 can grow much more than a bigger SIP started at 35. Start with whatever you can manage. Then increase the amount every year as your salary grows.
How much emergency fund should I keep in my 30s?
A common guideline is 6 months of household expenses. If you have a home loan, children, or a single income, keep more. Keep this money safe and easy to access. A savings account, a fixed deposit, or a liquid fund can work. Do not invest it in equity.
How much term insurance does a 30-year-old need?
A common rule of thumb is 10–15 times your yearly income. Add any big loans, like a home loan. Also add future goals, like your child’s education. A pure term plan gives high cover at a low premium. Buy it early, because premiums rise with age.
Is ELSS still useful under the new tax regime?
The new tax regime does not allow the Section 80C deduction, now Section 123 under the Income-tax Act, 2025. So ELSS gives no tax benefit there. But ELSS is still an equity fund. If it fits your long-term goals, it can still be part of your plan.
Should I stop my SIP when the market falls?
Usually, no. When the market falls, your SIP buys more units at a lower price. This can help your returns when markets recover. Stopping a SIP in a fall often means missing the recovery. Review your goals and risk level instead of reacting to the news.
When should I start financial planning?
Start with your first salary. Begin with three steps: build an emergency fund, buy term and health insurance, and start a SIP. Then set clear goals with amounts and dates. A qualified professional can help you build a plan that fits your income and family.
Read more on deepakwealth.com:
- Financial planning services in Chennai
- Start a SIP with mutual fund investment services
- How to choose term life insurance
- Choosing the right health insurance for your family
- Retirement planning for young earners
Official sources: AMFI India · Income Tax Department
Want a Simple Plan for Your 20s or 30s?
Book a free goal-planning call with our team in Pallikaranai, Chennai. We work with families across India and NRIs too.
Deepak Gokul, CWM®
Chartered Wealth Manager (CWM®) · NISM-Series-XVII: Retirement Adviser Certified · IRDAI Licensed Insurance Advisor · Founder, Deepak Wealth Framework
Deepak Wealth Framework Pvt Ltd — AMFI Registered Mutual Fund Distributor | ARN-328771
Deepak Gokul specialises in goal-based financial planning, child education planning, SIP investments, mutual fund advisory, and retirement planning for families across the globe. With his Chartered Wealth Manager (CWM®) certification and specialised training in retirement advisory, Deepak helps clients build long-term wealth through structured, disciplined financial planning.
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Mutual Fund investments are subject to market risks, read all scheme related documents carefully. This content is for illustrative and educational purposes only. We deal in Regular Plans. Last updated: September 2026.