Tax on FD interest: why you keep less than the rate

A fixed deposit feels like the safest way to grow money, and it is safe — but the interest rate the bank advertises is not what lands in your pocket. FD interest is fully taxable, tax is often deducted before you ever see it, and once you subtract tax and inflation, a 'safe' 7% can quietly turn into a real return near zero. Here's the full picture.

FD interest is taxed at your slab rate

Unlike equity (with its lower long-term capital-gains rates) or tax-free schemes like PPF, FD interest is simply added to your income and taxed at your slab rate. So if you're in the 30% bracket, roughly a third of your interest goes to tax — a 7% FD effectively returns under 5% after tax for you. The higher your income, the more the headline rate overstates what you actually earn.

TDS — tax taken before you see it

Banks deduct TDS (tax at source) on FD interest once it crosses a yearly threshold per bank (higher for senior citizens). Two things to know: TDS is only a part-payment of your tax, not the whole of it — if you're in a higher bracket you still owe the difference when filing; and if your total income is below the taxable limit, you can submit Form 15G (or 15H for seniors) so the bank doesn't cut TDS on interest you wouldn't owe tax on anyway.

The inflation problem

Put the two together — slab-rate tax plus inflation — and FDs often just about tread water. A 7% FD taxed at 30% is ~4.9% post-tax; with inflation around 5-6%, your real purchasing power barely grows or slightly shrinks. That's fine for an emergency fund or money you need soon, where safety is the point. It's a problem when FDs are your long-term wealth plan — they preserve money, they don't grow it.

How to hold FDs smartly

• Use FDs for safety and short horizons — emergency fund, money needed within 1-3 years — not as your long-term growth engine.
• Spread deposits or hold them via family members in lower tax brackets to manage the tax and TDS threshold sensibly.
• Submit Form 121 — which replaced Forms 15G and 15H from April 2026 — if your income is below the taxable limit, so TDS isn't deducted needlessly.
• For long-term goals, compare against equity/hybrid funds and tax-free options like PPF, which usually beat FDs after tax.

FDs are excellent at one job — keeping money safe and available — and poor at another — growing wealth after tax and inflation. Judge an FD by its post-tax, post-inflation return, not the poster rate: subtract your slab tax, remember TDS is only part-payment, and use 15G/15H when eligible. Keep FDs for the money you can't afford to risk, and let longer-term money work somewhere it can actually outpace tax and inflation.