When it comes to risk-free investments, Fixed Deposits (FDs) and Debt Funds are two common options. Although FDs have been the more popular choice, Debt Funds are gaining popularity - because they have the ability to give better returns than FD and are just as safe as FDs.
In fact, according to a 
report, 72 Debt Funds of 213 satisfied the test of having Credit Risk equal to, or better than a Fixed Deposit. 

Let us analyse the main differences between FDs and Debt Funds

Particulars

Debt Fund

Fixed Deposit

Returns

5.25% - 7.25%

6.0% to 8.0% 

Dividends

Yes

No

Risk

Low to moderate

Low

Liquidity

High

Low

Mode of investment

SIP or lump sum

Only lump sum

Penalties or charges on early withdrawal

Varies based on type of Mutual Fund

Yes

Other expenses

Expense ratio is involved 

No management costs

Taxes

STCG as per income tax slab; LTCG @12.5% without indexation benefits
 

What's the indexation benefit?
Indexation benefit accounts for inflation. This method ensures your returns are taxed fairly. 

As per income tax slab