Nine criteria. Five or more, and it stops being a personality quirk.
For a diagnosis of narcissistic personality disorder, the DSM-5 requires a persistent pattern of grandiosity, a need for admiration, and a lack of empathy, present by early adulthood and showing up across a range of situations, not just one relationship or one bad year. That pattern has to be demonstrated by five or more of the nine traits below.
Nobody needs to check every box. Most people will recognize a trace of one or two of these traits in perfectly ordinary people they know; that alone doesn't mean anything. What separates a clinical pattern from an occasional bad day is severity, consistency, and scope: these traits, at a diagnostic level, aren't exceptions to how someone normally behaves. They're the baseline.
Five or more, present consistently, meets the threshold
Narcissists tend to believe they're better at nearly everything than they actually are. They're a better singer, dancer, cook, or programmer than the people around them, and woe to anyone who suggests otherwise. Someone who demonstrates they aren't usually finds themselves quietly undermined rather than openly challenged.
Coverts will insist they could have been famous if it weren't for someone else's fault. Overts will steal other people's work and then tout that they were the youngest/best to ever get the job. All types will steal someone else's wealth, status or esteem and act like they're the source of it all.
She tends to fixate on a fantasy of wealth, power, being seen as brilliant, the most beautiful, or having the "perfect" relationship, and orients her life around it, sometimes taking from others to get there, but only in ways that are hard to trace back to her: marrying into a wealthy family and gradually diverting money from the biological children, or moving in with her golden child's new wife and engineering a divorce so she can net woman's assets and the grandchildren, living in a fantasy of being her son's real wife. She wants everything to live up to her perfect fantasies, and when it isn't, her rage builds. If her husband falls short of "perfect", and he always does, she may spend years quietly building toward revenge: against the children who resemble him, his career, his reputation.
She has strong, often contemptuous opinions about entire categories of people, calling whole groups "stupid" or beneath her. She wants to be seen with people who reflect well on her image, and when that's inconvenient, it's often easier to build a family she can control instead.
She needs to be admired at all times. Anyone who suggests she's done something wrong gets railed against and scapegoated, fast. She'll rally the rest of the family against that person even over minor slights, especially if she's the mother. A child who says "Mom is treating me unfairly" might hear "Mom works so hard, how could you say that?" from a sibling, or "My wife never does anything wrong! You're an ungrateful child" from her husband. Watch for complete exoneration of her, no real resolution of the actual conflict, and multiple family members closing ranks to ostracize whoever raised the concern.
Do a real, unreciprocated favor for her, and instead of gratitude you'll often get entitlement in return. Ask for basic sympathy and you might hear "I gave birth to you" or "I'm your wife." She deserves the best of everything, even in someone else's home. A mother who moves into her son's household rent-free and buys groceries once will remind everyone for years about the sacrifice she made. One who marries a man with existing children may act entitled to his whole estate, expecting his children to settle for less than hers, even though the money was his and his children's first. She believes she's owed everyone's time, money, and loyalty regardless of what she gives back, in reality, she believes she owns the members of her family, especially her own biological children.
She expects more than she gives. If she's generous, look closely; it's often with someone else's money, or in exchange for something you won't notice you're paying. She'll get other people to do her homework or her work projects, do the bare minimum at home while her husband works, or exploit systems she isn't entitled to. Watch for theatrical displays of how hard she works: at the extreme, a wealthy woman who married into money, directs household staff, and plans her own vacations, still insisting her husband does nothing for her. Or a woman living at home off a government stipend insisting that she works so hard. She may control her husband's access to his own money. He can't buy anything for himself, but she spends freely, or use money as leverage over her children. People who can't be exploited tend to get pushed out.
Empathy means actually being able to feel what someone else's experience is like, not just perform sympathy for it. A mother who cuts a child out of the family, leaves one child home while the others go on a trip, or gives one child a gift she knows they'll hate while showering another with things they love, framing it as the excluded child's fault for "behaving worse", is showing a lack of empathy directly. Consistent favoritism between children is itself a sign, not just an unfortunate parenting style. This one confuses some people, because narcissists try to appear "perfect" and thus express sympathy(not empathy) for others to keep up their image. The real tell is how they treat people they don't like or that they think don't like them. Do they show empathy to people they are at odds with? Or are their displays only for people in their good graces?
She assumes everyone secretly envies her, which is often projection. Underneath, she envies everyone else. This doesn't require her to actually be lacking anything: she could be the wealthiest or most conventionally beautiful person in the room and still want quiet revenge on her own daughter for being admired. She is in secret competition with everyone, even her own spouse and children, and she assumes everyone is in competition with her.
Whatever she is, it's better than what you are, sometimes in ways that don't even make sense together. New money might insist it's superior to old money because it's more "thrifty." Everyone else on the road is a bad driver; she's the best one out there. She manages money, the household, or her career better than anyone else could. There's always a hierarchy, and she's always at the top of it.
If she's not trying to appear like a saint, you might hear her complain loudly about someone so they can overhear, send food back in restaurants, and be rude to people that are less than her. When people ostracize you for her behavior, she'll gaslight you into believing you're the one who caused it.
Five or more, not all nine. A narcissist doesn't need to check every box on this list: only five or more, present consistently, not just under stress or on a bad day. If you're trying to understand or document a specific person's behavior, treat this as a framework for recognizing the pattern, not a substitute for an actual evaluation by a licensed clinician. Self-diagnosing a family member from a list is not the same as a diagnosis, but recognizing a pattern is often the first step toward understanding what you've been living with. See Defense & Recovery for what to do with that recognition.