Capacity Management - Managed Metadata term store (database) limits

Limit	Maximum value	Limit type	Notes
Maximum number of levels of nested terms in a term store	7	Supported	Terms in a term set can be represented hierarchically.  A term set can have up to seven levels of terms (a parent term, and six levels of nesting below it.)
Maximum number of term sets in a term store	1,000	Supported	You can have up to 1,000 term sets in a term store.
Maximum number of terms in a term set	30,000	Supported	30,000 is the maximum number of terms in a term set.   Note: Additional labels for the same term, such as synonyms and translations, do not count as separate terms.
Total number of items in a term store	1,000,000	Supported	An item is either a term or a term set. The sum of the number of terms and term sets cannot exceed 1,000,000. Additional labels for the same term, such as synonyms and translations, do not count as separate terms.   Note: You cannot have both the maximum number of term sets and the maximum number of terms simultaneously in a term store.