1Password Families is quoted at $4.49 a month, paid annually, with $5.99 struck through. That is $53.88 for the first year and $71.88 thereafter, on the same footnote that governs the Individual plan: the discount is for new customers, first year, annual billing.
The plan is described as everything in Individual plus “Invite up to 5 family members”, so on the vendor’s own description it covers six people. At the standard rate that is $11.98 per person per year.
Against the Individual plan it is the better buy almost immediately. Two standard Individual accounts cost $95.76; Families costs $71.88 and covers six. The break-even is two people, and it does not move much in the first year either ($71.76 against $53.88).
Monthly billing is $7.99, or $95.88 a year.