Your 401k contributions must be reflected on your Form W-2 (if they are an employee deferral). While your payroll company should be familiar with the process, here is a quick overview: Box 1 (Wages) – Do not include any pre-tax contributions made under an employee deferral.

When does an employer have to contribute to a 401k plan?

If the 401(k) plan is top-heavy, the employer may be required to make minimum contributions on behalf of certain employees. In general, a plan is top-heavy if the account balances of key employees exceed 60% of the account balances of all employees.

What’s the contribution limit for a 401K in 2018?

Highlights of Changes for 2018 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.

When is the deadline to contribute to a 401K in 2018?

If you have an S-Corporation or partnership LLC, the deadline for 2018 contributions is March 15th, 2019. Both of these deadlines (March 15th and April 15th) to make 2018 contributions may be extended another six months by filing an extension.

Are there any tax deferrals for a 401k plan?

The underlying plan can be a profit-sharing, stock bonus, pre-ERISA money purchase pension, or a rural cooperative plan. Generally, deferred wages (elective deferrals) are not subject to federal income tax withholding at the time of deferral, and they are not reported as taxable income on the employee’s individual income tax return.

Is the employer contribution to a 401k tax deductible?

Employer contributions are deductible on the employer’s federal income tax return to the extent that the contributions do not exceed the limitations described in section 404 of the Internal Revenue Code.

Are there any tax advantages to a 401k plan?

Two of the tax advantages of sponsoring a 401(k) plan are: Employer contributions are deductible on the employer’s federal income tax return to the extent that the contributions do not exceed the limitations described in section 404 of the Internal Revenue Code.