How is FD interest calculated?
A fixed deposit locks a lump sum with a bank or NBFC for a chosen term at a rate agreed on the day you book it. Unlike a loan, where the balance shrinks, your deposit only grows: the bank pays interest on the principal and then on the interest already added, so every compounding step builds on the one before it.
Indian banks almost always add FD interest every quarter — this is the market standard, and it is what this calculator uses by default. Monthly compounding lifts the maturity a touch, yearly compounding trims it, and a plain simple-interest deposit adds no compounding at all. You can switch between all four above.
FD maturity for ₹1 lakh, ₹5 lakh and ₹10 lakh
Maturity scales in direct proportion to what you put in, so a ₹5,00,000 deposit earns exactly five times the interest of a ₹1,00,000 deposit at the same rate and tenure. Time is what really moves the needle: at 7% a one-year deposit adds about ₹7,186 per lakh, while a five-year deposit adds over ₹41,000 per lakh as quarterly compounding gathers pace.
| ₹1,00,000 · 1 year | ₹1,07,186 |
| ₹1,00,000 · 3 years | ₹1,23,144 |
| ₹1,00,000 · 5 years | ₹1,41,478 |
| ₹5,00,000 · 5 years | ₹7,07,389 |
| ₹10,00,000 · 5 years | ₹14,14,778 |
Senior citizen FD rates
Most banks pay depositors aged 60 and above an extra 0.50% on the very same deposit. A ₹5,00,000 five-year FD booked at 7.5% instead of 7% earns roughly ₹17,583 more by maturity, and a few banks add a further super-senior bonus for those above 80. Turn on the senior-citizen toggle above to fold this 0.5% into the rate automatically.
The higher rate applies only to deposits held in the senior citizen’s own name. It does not carry over to a joint deposit where the first holder is younger than 60.
| Regular rate 7.0% | ₹7,07,389 |
| Senior rate 7.5% | ₹7,24,972 |
| Extra interest earned | ₹17,583 |
FD vs RD vs savings account
A fixed deposit suits money you already have and won’t touch for a while, a recurring deposit is for money you set aside month by month, and a savings account is for cash you may need at any moment. The trade-off is return: a savings account typically pays 2.5%–4%, well below the roughly 7% a fixed deposit offers, while an RD lands near the FD rate but earns on a balance that builds up gradually rather than all at once.
If you have a lump sum sitting idle in a savings account, shifting it to an FD is usually the single easiest way to earn more without taking on any market risk.