Predictive Dialer

A predictive dialer is a calling system that uses math to guess when agents will be free and dials ahead, often placing more calls than there are agents available.

Predictive dialers came from large call centers. The system watches average call length, answer rates, and agent availability, then paces dialing so an agent is ready the moment someone picks up. When the guess is wrong, a person answers and no agent is free.

That is why abandoned call rules exist. Under FCC rules, telemarketers may not abandon more than three percent of live-answered calls per campaign, measured over 30 days. A call is abandoned if it does not connect to a live representative within two seconds of the greeting. When that happens, a prerecorded message must give the seller's name and phone number and an opt-out.

Predictive dialers have also been central to TCPA litigation over what counts as an autodialer. In 2021, the US Supreme Court in Facebook v. Duguid narrowed the definition, but state laws and the separate artificial voice rules still apply.

When predictive dialing makes sense:

• Very large lists.
• Many agents working at once.
• Calls where small delays are acceptable.

For smaller teams, power dialers or AI agents that speak to every answered call are often simpler and carry less abandonment risk.

Sources

• 47 CFR 64.1200 (eCFR): https://www.ecfr.gov/current/title-47/chapter-I/subchapter-B/part-64/subpart-L/section-64.1200 (accessed October 17, 2026)
• Facebook, Inc. v. Duguid (2021), Supreme Court opinion: https://www.supremecourt.gov/opinions/20pdf/19-511_p86b.pdf (accessed October 17, 2026)

This entry is general information, not legal advice.