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Question about Tax on Retirement Accounts

Posted on 5/11/23 at 10:22 am
Posted by BigOrangeVols
Knoxville
Member since Jul 2015
3069 posts
Posted on 5/11/23 at 10:22 am
Would someone be able to help me out with understanding how tax in retirement works? I currently have assets in a Roth IRA, Roth 401K, traditional IRA, a previous employer's 403B and then some other brokerage accts.

My primary question being how retirement income is calculated. For simplicity sake, say in a retirement year I were to withdraw $50K from my Roth accts and $50K from my traditional/taxable accounts - is tax for my taxable income calculated as if I made $100K in income or just the $50K that's taxable?

I've been lucky to have been able to increase my annual income the last couple years by about 40% so evaluating whether I continue utilizing a Roth 401K vs. traditional 401K. Contemplating changing to traditional and trying to contribute enough to drop out of the 24% bracket but also really like the idea of non-taxable income in retirement. Thanks!
This post was edited on 5/12/23 at 11:19 am
Posted by CISO
ATX
Member since Nov 2021
1082 posts
Posted on 5/11/23 at 12:01 pm to
When you withdraw money from a retirement account, the amount that is taxable depends on the type of account.

Roth IRAs and Roth 401(k)s are funded with after-tax dollars, so withdrawals are not taxable.

Traditional IRAs and traditional 401(k)s are funded with pre-tax dollars, so withdrawals are taxable. The amount that is taxable is based on your income and filing status.

403(b)s are similar to 401(k)s, but they are offered by certain types of employers, such as schools and nonprofits. The tax treatment of 403(b) withdrawals is the same as traditional IRA and 401(k) withdrawals.

Brokerage accounts are not retirement accounts, so withdrawals are taxable at your ordinary income tax rate.

In your example, if you withdraw $50,000 from your Roth accounts and $50,000 from your traditional/taxable accounts, your taxable income would be $50,000.

If you are considering changing from a Roth 401(k) to a traditional 401(k), you need to consider your current income and your expected income in retirement. If you are in a high tax bracket now, but you expect to be in a lower tax bracket in retirement, then it may make sense to contribute to a traditional 401(k). However, if you expect to be in a high tax bracket in retirement, then it may make sense to contribute to a Roth 401(k).
Posted by TorchtheFlyingTiger
1st coast
Member since Jan 2008
2243 posts
Posted on 5/11/23 at 6:28 pm to
Even better, below a certain taxable income long term gains are currently taxed at zero. So in example above you could take as much Roth as desired with no tax impact, $50k from traditional retirement accounts and pay your tax rate (effective rate not tax bracket rate because some will fall in lower brackets and standard deduction).

On top of that you could withdraw from taxable brokerage without any taxes on Long term gains until you hit taxable income limit for zero LTCG which is currently somwthing over $40k single $80k married after standard deduction (i think). And basis for taxable sales can be withdrawn tax free anytime.

So with Roth/traditional/taxable buckets it's very feasible to draw $150k with very little tax, only the traditional above standard deduction.
Posted by slackster
Houston
Member since Mar 2009
86968 posts
Posted on 5/11/23 at 11:10 pm to
quote:

Contemplating changing to traditional and trying to contribute enough to drop out of the 24% bracket but also really like the idea of non-taxable income in retirement. Thanks!


It is very very very very difficult to have a 24% effective income tax rate in retirement under any reasonable version of the current tax system. Saving that money pre-tax is almost certainly a better option, and you can and should invest the tax savings too.
Posted by gpburdell
ATL
Member since Jun 2015
1457 posts
Posted on 5/12/23 at 10:22 am to
For retirement, tax optimization is the end game. Others have already mentioned that your tax liability depends on account type, cost basis etc of where your income comes from. In retirement this can change from year to year depending on many things.

For example, if you are retiring before 65 and plan to use ACA for healthcare. Then the goal could be to reduce your taxable income as much as you can to maximize ACA premium subsidies until Medicare. The key word here is "taxable". You could still have 100k of income but the taxable portion might be only 50k. The tax rate on that 50k would even vary if it's made up of a combination of capital gains, IRA/401k withdrawals, dividends and interest.

Over on Bogleheads, I've seen this tool mentioned to help plan withdrawal optimization from different account types etc. It includes inputs for ACA, SS income, roth conversions etc. This tool isn't as useful for someone who is planning to leave a significant inheritance. That would require different kind of planning.

https://www.i-orp.com/Plans/extended.html
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