Do Your FDs and Savings Beat Inflation After Tax?

Why the interest rate isn't your return

An FD's rate looks like growth, but tax and rising prices take their share first.

Tax comes out of the interest, at your slab rate plus cess. Inflation then shrinks what the remaining rupees buy. What's left is your real return: (1 + FD rate × (1 − tax rate)) ÷ (1 + inflation) − 1. If it's below zero, your balance grows in rupees but buys less each year.

₹10,00,000 at 6.5%, worked through

The same FD can keep pace for one person and fall behind for another.

Take ₹10,00,000 in an FD at 6.5% a year, with CPI at 5.54%. In the 30% slab, tax with cess is 31.2%, so the FD earns about 4.47% after tax and about −1.0% after inflation. If your income is covered by the rebate, you keep the full 6.5% and stay about 0.9% ahead.

Over 5 years in the 30% slab, that adds up to about ₹49,600 of buying power lost. A savings account at 2.5% trails CPI by about 2.9% a year even with no tax.

How FD interest is taxed

Many savers think the tax deducted by the bank is the whole tax. It often isn't.

FD interest is income from other sources, taxed at your slab rate in either regime. Under Section 393(1), Table S.No. 5(ii) (formerly Section 194A), the bank deducts 10% once your interest from it crosses ₹50,000 in a year, or ₹1,00,000 if you're a senior citizen. In the 20% or 30% slab, you pay the rest when you file. In the old regime only, Section 153 (formerly Sections 80TTA and 80TTB) allows up to ₹10,000 of savings account interest (not FD interest), or for senior citizens up to ₹50,000 of interest including FDs, as a deduction. Check which regime suits you.

When an FD is still the right choice

A negative real return doesn't make an FD the wrong tool. It depends on the job.

FDs are low risk, not risk-free: deposits are insured up to ₹5 lakh per depositor in each bank, and breaking one early can cost a penalty. They suit money you need to be there on a date. That covers goals under 3 years, like a down payment next year, and your emergency fund. Losing about 1% a year of buying power is a fair price for certainty over a short period. Over 10 or 20 years, the same gap keeps compounding. Read how big your emergency fund should be, and check your own inflation rate, which may differ from CPI.

What to do if your FD is falling behind

Knowing the gap helps only if it changes where long-term money goes.

Keep short-term and emergency money in FDs. For goals 3 or more years away, consider directing part of your savings to investments matched to the goal's timeline, accepting that their value moves. Investing the buying power your FD loses each year, spread monthly, is one simple way to start. Returns from investments are not assured. Recheck when your slab, your FD rate or CPI changes.

Common mistakes

Most FD comparisons go wrong by stopping at the headline rate.

• Comparing the FD rate with inflation before tax.
• Treating the 10% deducted by the bank as your full tax.
• Using an old CPI figure, or a long-run average, as this year's inflation.
• Keeping goal money for 10 years or more in FDs without checking the real return.
• Moving emergency money out of FDs to chase a higher return.
• Leaving large balances in a savings account at about 2.5%.