A dormant demat account is one where no transactions have happened for a long period, so the depository participant flags it as inactive. The shares inside remain safe and yours; only fresh debits are restricted until you reactivate it.
The exact inactivity period and process depend on your DP and depository rules. Once an account is flagged, the DP will usually ask for extra checks before allowing you to sell or transfer shares. This is a safety measure, because dormant accounts were a common target for fraud, where someone moved shares out without the owner noticing.
Reactivation is usually simple. You submit a request, sometimes with fresh KYC documents or an in-person verification, and the account becomes active again. Say you bought 100 shares of a hypothetical company in 2018 and forgot about them. When you finally want to sell, expect a short delay for verification.
Two common mistakes. People assume a dormant account has no charges, but the annual maintenance fee may still be levied. Others forget the account entirely and lose track of dividends or corporate actions. If you have old accounts from earlier jobs or app offers, either consolidate the shares or close them.
Keeping your account structure tidy is one of the first habits we build in our Diploma in Stock Market.