How to change your bank account details online

You can update your registered bank account so that your EMIs or monthly SDP investments are debited on time, and you do not miss any of your instalments.

Update your bank account details in Service portal

• Click on the ‘Sign-in’ button on this page.
• Enter your registered mobile number, and date of birth and submit the OTP to sign-in.
• Go to the ‘Menu’ and click on ‘Bank details/ Documents’
• Select the ‘Change your bank details’ option
• Click on ‘Change’ in front of the loan or SDP for which you want to change the registered bank account
• Click on ‘Continue’ and proceed with mandate registration. 

Alternatively, you can click on the link given below to change your mandate.

Update your bank account details

Your NACH mandate is what allows your EMI to be auto-debited from your bank account each month. If you update your mandate, timing it correctly and understanding what repeated bounces can do to your credit score both matter.

Timely mandate update prevents overdue EMIs

Since e-NACH registration can take a few business days to be verified and activated by your bank, it is advisable to update your mandate at least 10 to 15 days before your next EMI due date. This gives enough time for the new mandate to be processed and linked to your loan account before the auto-debit is attempted.

Updating closer to the due date increases the risk that your bank has not yet confirmed the new mandate when the EMI is due, which could cause the auto-debit to fail. Allowing this buffer is a simple way to keep your EMI repayment running smoothly, without needing to make a manual payment that month.

Impact of repeated NACH bounces on credit score

A single NACH bounce, caused by an outdated mandate or insufficient balance, is usually just an inconvenience. However, if your mandate details are not corrected and this happens repeatedly, each bounced EMI is generally reported to CIBIL and other credit bureaus, and can show up as a missed or delayed payment on your credit report.

Over time, repeated bounces can lower your CIBIL score, since lenders view them as a sign of unreliable repayment. They may also attract bounce or penal charges as per your loan agreement. Keeping your mandate details current, and updating them well before your due date, is the simplest way to avoid this pattern altogether.

One flag: I've kept the "10 to 15 days" buffer as practical guidance rather than a stated official rule, since I couldn't find an RBI or NPCI-mandated lead time for this, only general e-NACH processing times. Worth confirming this figure matches Bajaj Finance's actual internal guidance before publishing.