@ Parveen
1. There is no specific Tax Rate on income from RD Interest. It will be added to your Gross Income under the Schedule OS (Other Sources) and will be taxable as per your Tax Slab.
2. In order to clarify regarding the TDS Provisions by Bank on Interest is that Bank will deduct TDS @ 10% on Total interest credit to all Accounts of a Holder if it exceeds Rs. 10K during the Year in a Single Branch. Any interest earned by holder in 1 branch has nothing to consider any interest earned through another branch even of same bank. TDS will be attracted not only on FD's but it cover all type of Accounts on which the interest is credited by Bank i.e. SB A/c, RD A/c, TD A/c, SCSS A/c, etc.
3. In case the holder doesn't furnish the PAN the TDS will be deducted @ 20 %.
4. Now come to the point on Calculation of interest on RD A/c
Let me tell you that you haven't provided the complete details, you told that the interest is 8.25% irrespective of the details that whether it is Annual Interest, Compounded yearler, Half Yearly, Quarterly or Monthly. Generally bank provides Compounding Quarterly. But it differs from Bank to Bank.
To calculate interest, i have assumed that the interest provided is Simple Per Annum Interest.
Total Interest Earned:
Installment X No. of Installment X Interest Rate P.A. X No. of Years
100 X 2
i.e. Rs. 1000 X 60 X 8.25 X 5 = Rs. 12375/-
100 X 2
Total Maturity Value = Rs. 6000 (principal) + Rs. 12375 (interest) = Rs. 72375/-
CALCULATION WILL BE DIFFERENT IN CASE OF COMPOUNDING YEARLY, H.Y., QRTLY, MONTHLY, ETC.
Hope you understand the concept with this illustration.