The contribution limit for employees who participate in 401(k), 403(b), most 457 plans, and the federal government’s Thrift Savings Plan is increased from $18,000 to $18,500. The catch-up contribution limit for employees aged 50 and over who participate in 401(k), 403(b), most 457 plans and the federal government’s Thrift Savings Plan remains unchanged at $6,000. So the maximum contributions you can make to a 401(k) account if age 50 or older in tax year 2018 is $24,500. See this IRS website for information - https://www.irs.gov/newsroom/irs-announces-2018-pension-plan-limitations-401k-contribution-limit-inc...
You can contribute to a Roth IRA up to a maximum of $6,500 if age 50 or older in tax year 2018. However, you may be limited on the Roth IRA contribution based on your MAGI and filing status. See this IRS website for Roth IRA contribution limitations - https://www.irs.gov/retirement-plans/plan-participant-employee/amount-of-roth-ira-contributions-that...
Note that Roth IRA contributions are not deductible on a federal tax return.
