"The per-participant flat premium rate for plan years beginning in 2018 is $74 for single-employer plans (up from a 2017 rate of $69) and $28 for multiemployer plans (no change from 2017). The increase in the single-employer rate was provided in The Bipartisan Budget Act of 2015.... For plan years beginning in 2018, the variable-rate premium (VRP) for single-employer plans is $38 per $1,000 of unfunded vested benefits (UVBs), up from a 2017 rate of $34. This $4 increase was provided in The Bipartisan Budget Act of 2015 (BBA 2015). Although the VRP rate is subject to indexing in addition to the BBA 2015 increase, indexing had no effect for 2018. For 2018, the VRP is capped at $523 times the number of participants (up from a 2017 cap of $517). Plans sponsored by small employers (generally fewer than 25 employees) may be subject to a lower cap."