Short answer: Your demat account number is a unique identifier that your depository participant (DP), the broker or bank that opened your demat account, assigns when the account is opened and verified. The quickest places to find it are the welcome email from your broker and the profile or account details section of its website or app. If neither helps, the NSDL or CDSL Consolidated Account Statement portal can show it.
Last reviewed: 12 November 2026
At a glance
| Where to look | What you will find | Points to note |
|---|---|---|
| Welcome letter or email | Usually lists the demat account number, also called the BO ID | Sent after account opening by the broker or depository |
| Broker’s profile, account details or settings | The demat account number | Menu names depend on the broker’s app |
| Transaction summaries | The demat account number | Also used in transactions |
| NSDL or CDSL Consolidated Account Statement (CAS) portal | Every demat account linked to your PAN | Needs PAN, date of birth or related details, plus a one-time password (OTP) |
| DP customer support or branch | The number, after identity checks | Identity is verified with PAN and other details |
What is the number made of?
A demat account is an electronic account that holds your shares, and its number is built by joining two parts. The first is the DP ID, which identifies your depository participant. The second is your own client identifier, which identifies you within that participant’s records.
Brokers often call this number the BO ID. You will see both labels, and they refer to the same number. Knowing the two parts helps you spot a mistake if a number you have copied does not look right.
Where can you find it on your own?
Start with the welcome letter or email. The broker or depository usually sends it after your account is opened, and it lists the demat account number. The catch is that the email can be buried or deleted, and if it is, you will need another route.
Next, check the broker’s website or app. The number is usually in the profile, account details or settings section. Your transaction summaries also show it, so a past statement may hold the answer.
How does the CAS portal help?
The Consolidated Account Statement, or CAS, is a combined statement from NSDL and CDSL, the two depositories. To use it, you log in with your PAN (Permanent Account Number), your date of birth or related details, and then verify with a one-time password (OTP), a code sent to confirm it is you.
The CAS lists every demat account linked to your PAN across both depositories. This is useful, but it can also show accounts you had forgotten. Each one has its own number, so read the full list rather than stopping at the first account you recognise.
What if you still cannot find it?
Contact your depository participant’s customer support, or visit its branch. The DP will verify your identity with your PAN and other details before sharing the number. Expect this route to take longer than an online check, because the identity steps come first.
A worked example with invented numbers
This is a hypothetical example. All figures are invented for illustration.
Suppose a DP ID is 1234 and a client identifier is 56789. Joining the two gives a demat account number of 123456789.
Now suppose the CAS lists two accounts for the same PAN. The first has DP ID 1234 and client identifier 56789, giving 123456789. The second has DP ID 9876 and client identifier 1002, giving 98761002. Each account has its own number, so the CAS shows two separate numbers, and you would need to note which broker holds which one.
Frequently asked questions
Is my demat account number the same as my client ID?
No. The demat account number is the DP ID joined with your client identifier, so the client identifier is only one part of it.
Is my demat account number the same as my PAN?
No. Your PAN is used to log in to the CAS portal and to verify your identity with the depository participant. The demat account number is assigned by the DP when the account is opened and verified.
Will the CAS show all my demat accounts?
It lists all demat accounts linked to your PAN across NSDL and CDSL. That makes it a useful check, but it may show accounts you have forgotten.
Can I find my demat account number without logging in anywhere?
Yes. The welcome letter or email usually lists it, and transaction summaries also show it.
Sources and last check
Facts in this article were checked against the sources below on 12 November 2026. Rules and figures can change; check the primary source before acting.
- icicidirect.com (broker education)
- groww.in (broker education)
- kotakneo.com (broker education)
- upstox.com (broker education)
This article is general information, not investment advice. MyFinanceBandhu is not a SEBI-registered investment adviser.