The IRS has announced 2018 HSA limits as follows:
Annual contribution limitation. For calendar year 2018, the annual limitation on deductions for HSA contributions under § 223(b)(2)(A) for an individual with self-only coverage under a high deductible health plan is $3,450 (up from $3,400 in 2017), and the annual limitation on deductions for HSA contributions under § 223(b)(2)(B) for an individual with family coverage under a high deductible health plan is $6,850 (up from $6,750 in 2017).
High deductible health plan. For calendar year 2018, a “high deductible health plan” is defined under § 223(c)(2)(A) as a health plan with an annual deductible that is not less than $1,350 for self-only coverage or $2,700 for family coverage (up from $1,300 and $2,600 in 2017), and the
annual out-of-pocket expenses (deductibles, co-payments, and other amounts, but not premiums) do not exceed $6,650 for self-only coverage or $13,300 for family coverage (up from $6,550 and $13,100 in 2017).
Rev. Proc. 2018-18 (revising the previously-published annual limitation on deductions under Code § 223(b)(2)(B) for 2018 for an individual with family coverage under a high deductible health plan from $6,900 to $6,850)