Interest on tds

If TDS has not been deducted & paid

- Interest rate is 1% per month

- Period = Due date of deduction to Date of deduction

- Part of the month = complete month

If TDS has been deducted but not paid

- Interest rate is 1.5% per month

- Period = Date of deduction to Date of payment

- Part of the month = complete month

- TDS deducted but not paid is intentional default therefore high interest rate and period also start from due date of deduction.

In your case first condition is applicable