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Pre-tax and Post-tax 401k contributions

Posted on 11/3/14 at 10:51 am
Posted by GregMaddux
LSU Fan
Member since Jun 2011
18210 posts
Posted on 11/3/14 at 10:51 am
Employer offers both. Which one of these should I be doing and why?
This post was edited on 11/3/14 at 10:52 am
Posted by Vrai
Baton Rouge
Member since Nov 2003
3891 posts
Posted on 11/3/14 at 10:58 am to
Pre-tax. Lowers your taxable income.
Posted by TheHiddenFlask
The Welsh red light district
Member since Jul 2008
18384 posts
Posted on 11/3/14 at 10:59 am to
And the first response is terrible.
Posted by LSU0358
Member since Jan 2005
7916 posts
Posted on 11/3/14 at 11:09 am to
quote:

Which one of these should I be doing and why?


Is the post tax a roth 401K?

I'd assume yes, but it's important to know.
Posted by GregMaddux
LSU Fan
Member since Jun 2011
18210 posts
Posted on 11/3/14 at 11:12 am to
Yes
Posted by TheHiddenFlask
The Welsh red light district
Member since Jul 2008
18384 posts
Posted on 11/3/14 at 11:27 am to
Post tax is a good idea if you are early in your career with a lot of potential pay increases.

Pre tax is better when you are making more money because it lowers your taxable income.

You should aim to have a mix of both, as it will increase your financial flexibility in retirement.

ETA: Sorry, had it backwards the first time. Posting from phone.
This post was edited on 11/3/14 at 1:28 pm
Posted by GregMaddux
LSU Fan
Member since Jun 2011
18210 posts
Posted on 11/3/14 at 11:31 am to
quote:


You should aim to have a mix of both, as it will increase your financial flexibility in retirement.


I am young with decent salary. I have had a mix of both for a while but wasn't sure if this was the right thing to do as everyone automatically says "when have you ever seen taxes go down". Quite simplistic and incomplete reasoning.
Posted by Big Saint
Houston
Member since May 2009
1453 posts
Posted on 11/3/14 at 11:36 am to
quote:

Post tax is better when you are making more money because it lowers your taxable income.


????

Post tax doesn't lower taxable income.
Posted by LSUtigerME
Walker, LA
Member since Oct 2012
3789 posts
Posted on 11/3/14 at 11:43 am to
Yeah, he had it backwards and it's confusing.

There's a lot that goes into this, but the only options worth considering are pre-tax or Roth. If you don't qualify for a Roth IRA, go pre-tax. If you do, likely recommendation is ore-tax 401k up to company match, then remaining funds available for savings into Roth. If you max Roth, switch back to Pre-Tax, if you max that, THEN go post-tax.

If you have a Roth 401k option, shite gets more complex in trying to project incomes and tax brackets.

As mentioned earlier, having a good mix in retirement is always a good plan.
Posted by LSU0358
Member since Jan 2005
7916 posts
Posted on 11/3/14 at 12:03 pm to
Both methods are tax free growth. One taxes you now vs the other taxing you later. For instance, I have money an IRA that I was looking at rolling to a RothIRA. After a close look it didn't matter much either way. The biggest thing to consider is your tax rate now (and through the course of your contributions) vs your expected tax rate in retirement.

You have to crunch numbers to reach a decision that's best for you. The toughest part is dealing with tax rates that might change by the time you retire and of course what return on your account you go with.

Posted by TheHiddenFlask
The Welsh red light district
Member since Jul 2008
18384 posts
Posted on 11/3/14 at 1:30 pm to
quote:

Both methods are tax free growth


Nope. Traditional is tax deferred growth. Big difference.

You are correct in that the difference between the two is small, but in most situations, there is an advantage with the ROTH option from a pure after tax return perspective.
Posted by LSU0358
Member since Jan 2005
7916 posts
Posted on 11/3/14 at 4:24 pm to
quote:

Traditional is tax deferred growth. Big difference.


I was referring to the account itself and its earnings during the contribution period (ie before retirement), I should have been more clear. Money being added to the account is taxed with the Roth401k and withdrawals are taxed with a traditional 401k.

quote:


You are correct in that the difference between the two is small, but in most situations, there is an advantage with the ROTH option from a pure after tax return perspective.


From what I could tell it all boiled down to the tax bracket one is in during the retirement years vs income in the contribution phase.
This post was edited on 11/3/14 at 4:29 pm
Posted by member12
Bob's Country Bunker
Member since May 2008
32089 posts
Posted on 11/3/14 at 4:44 pm to
Can you do both?

How much do you expect your taxes to be when you approach retirement?
This post was edited on 11/3/14 at 4:45 pm
Posted by tirebiter
7K R&G chile land aka SF
Member since Oct 2006
9181 posts
Posted on 11/3/14 at 4:52 pm to
quote:

How much do you expect your taxes to be when you approach retirement?


It's basically a WAG if one is many years from retirement. If you retire in a similar or lower tax bracket the traditional /post tax 401k is better. Many will be better off going traditional and actively managing withdrawals prior to RMD years while staying below higher tax brackets. That said, about half of our investments are in taxable and the rest tax deferred or Roth.
Posted by LSUFanHouston
NOLA
Member since Jul 2009
37025 posts
Posted on 11/3/14 at 4:53 pm to
There is no easy answer, because you are trying to determine what your marginal tax rate will be in 30-40 years, which is a determinent of what your income is then, and what tax rates are then.

There are some mathmatical calculations out there that show if your tax rate is the same now as it is in retirement, your tax burder will be the same over the long haul. Do you want to take the tax hit now or later? If your tax rate is lower in retirement, then a regular is better, if you think your rate will be higher in retirement, then go with the Roth 401K.

What I do: I hedge my bets. All employer matches/contributions go into the pre-tax account. So I put my contributions in the Roth, and the matches go into pre-tax, and I'll have some pools of taxable and tax-free income upon retirement.
Posted by TigerDeBaiter
Member since Dec 2010
10256 posts
Posted on 11/3/14 at 7:14 pm to
quote:

What I do: I hedge my bets. All employer matches/contributions go into the pre-tax account. So I put my contributions in the Roth, and the matches go into pre-tax, and I'll have some pools of taxable and tax-free income upon retirement.


This. If your going Roth with a match, you automatically get both, as the match can't be put in the roth.
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