Can I make a 401(k) contribution for the 2017 tax year in March 2018, and is that contribution deductible for the 2017 tax year?

What are the deadlines for making contributions to a 401(k)? Now that it is March 2018, can I make a contribution to my 401(k) for tax year 2017? If I can make a 401(k) contribution for the 2017 tax year, will that contribution be deductible for the 2017 tax year?

401(k), Taxes
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2 weeks ago
  • Deadline for 401(k) in 2018 is December 31, 2017
  • No, with a 401(k) all contributions are for the current tax year
  • Yes, contributions made in 2017 are deductible for 2017. This will show up on Box 13 of your W-2

Great questions. I hope this helps.

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