Is “free money” a spam trigger word?

Modern filters (Gmail, Outlook, Apple Mail) don’t keep a simple banned-word list — they score each message with models trained on billions of examples of wanted and unwanted mail. “Free money” lives almost entirely in the unwanted pile: giveaways, get-rich-quick pitches, and phishing lures like “claim your free money.” So it pushes a message’s content-risk score toward the promotions or spam folder.

It’s a stronger signal than a neutral “free” on its own, because the combination is the tell. Legitimate senders rarely promise strangers money for nothing; scammers do it constantly. Pair the phrase with an all-caps subject, exclamation marks, and a link, and you’ve reproduced the fingerprint of the mail filters are most confident about rejecting.

Subject lines amplify it further — filters and recipients both weigh the subject more heavily than body copy, so “FREE MONEY” there is close to the worst place you can put it.

No — no single phrase does that on its own, and the rest of your setup decides the outcome. Authentication and reputation do the heavy lifting: if your domain passes SPF, DKIM, and DMARC, you keep spam complaints low, and recipients open and reply, a stray risky phrase is survivable. Google’s sender guidelines are explicit that bulk senders are judged on authentication, a spam-complaint rate below 0.30%, and one-click unsubscribe — not on a forbidden vocabulary.

The honest framing: treat “free money” as a tiebreaker you’re almost always going to lose. On a cold or poorly authenticated domain, it can be the difference between inbox and junk; on a warm, clean domain it still drags your content score and rarely earns its keep.

Because the phrase is so strongly scam-coded, dropping it is the easiest possible trade to make — the upside is tiny and the downside is landing next to the phishing mail filters are built to catch.

Decide what you actually mean, because “free money” usually stands in for something more concrete. If it’s a no-cost offer, name the thing: “a complimentary audit,” “a free trial of X,” “on us” — these carry the benefit without the giveaway baggage.

If you mean savings or ROI, use the real number. “Cut your AWS spend ~18%” or “save about $4k a quarter” is both more believable and more persuasive than a vague promise of money for nothing — specificity reads as legitimate, where “free money” reads as bait.

The goal isn’t to avoid talking about value. It’s to sound like a person describing a real benefit, not a promotion shouting a slogan filters have seen a billion times.