401k contribution reduction > owe tax when filing?

[arodrigo23]

Money is extremely tight right now and I would like to eliminate my 401k contribution for the next 8 months so that I get a little more in each paycheck. Then I'll go back to contributing so I can get my company's match. If I do this, is it possible I'll end up owing money when I file my taxes next year? I have never owed before and I usually get something back. 

[DoninGA]

Use the IRS withholding estimator and then give your employer a new W-4 based on the estimator - https://www.irs.gov/individuals/tax-withholding-estimator

[Opus 17]

In general, the W-4 system is supposed to be self-adjusting.  If your withholding is basically ok now, when you stop your 401k and your taxable income goes up, your withholding should automatically go up proportionally.  You shouldn't need to make a specific change for this event.  You can certainly double-check with the IRS web site once the payroll change is processed.