That is not clear/correct advice. Regardless of any tax bracket differential, you should 100% be funding a Roth IRA after making sure you get all the "free" company match funds that you can in a 401(k) or equivalent. First, Roth IRA earnings are tax free, which is the first major upside to a Roth IRA. If your Roth IRA grows $500k, you pay ZERO on that money. Second, you can get the Roth IRA principle out for any reason at any time without penalty. You can't put it back in once you pull out the principle, but it's the perfect emergency fund if you ever need it. Even
the Roth IRA earnings can still be accessed in many instances without penalty (e.g., $10k for first time home purchase for Roth owner or their direct family). Finally, and many people miss this, Roth IRA distributions in retirement are
not counted as income for tax purposes, so you end up avoiding significant taxation on SS/401k "income" (i.e., as the Roth IRA distribution doesn't increase your income to the level where you are taxed on your SS income). The current threshold is roughly a combined income (i.e., adjusted gross income, taxable interest, and 50% of SS benefit) above $25k, after you factor in standard deduction + exemptions. With the Roth IRA supplementing additional income above the $32k of actual income (reminder that only 50% of SS benefit is counted), the tax owed can be as little as $1k on the initial $32k of "income" (i.e., 2-3% tax rate). Without the Roth,
85% of the previously untaxed SS benefits become taxable above that current threshold. Yes, 85% of previously untaxed SS "income" becomes taxable. Assuming a 25% tax rate on that $185 ($100 additional income + $85 of SS benefit taxation), you are now going to have to effectively pay $46.25 in tax (at least until you have all 85% of your SS benefits taxed). That $32k if initial can be viewed as follows:
- $15k SS benefit (only 50%, or $7,500, counts as combined income) <--typical monthly benefit is now ~$1,200
- $17.5k from 401(k)
It is simplest to view the Roth IRA as a way to also avoid paying a 46% tax rate. A mix of SS + 401(k) + Roth IRA + Cash let's you dial in a steady retirement income with the maximum tax avoidance. The Roth IRA is beyond powerful, which is why I always recommend starting one ASAP!