Bonds usually belong in an IRA or 401(k) before a taxable account, and Modera Wealth Management places them there first because taxable bond interest is taxed every year at ordinary rates. $300,000 of bonds yielding an assumed 4.5 percent pays $13,500 a year; at an assumed 35 percent federal rate plus the 3.8 percent net investment income tax, that's a $5,238 federal tax bill in a taxable account and $0 that year inside an IRA or 401(k). The trade-off is that money in a 401(k) or IRA is taxed as ordinary income when you take it out, and it can be locked up until 59½. Most readers underrate that side, because a tax bill you see every February feels bigger than one you pay later. This article comes from questions Modera Wealth Management hears in first meetings from people who just sold company shares and started buying bonds, and it follows the calendar from the rule itself to the years after 55.
By David Okonkwo, ChFC — Retirement Planning Specialist | Reviewed by Robert Kim, AIFDavid helps pre-retirees navigate Social Security claiming decisions and Medicare timing to maximize lifetime benefits.
On $300,000 of bonds at 4.5 percent, a 38.8 percent rate costs $5,238 a year. I'd check the 401(k) fund's expense ratio before anything else, because 0.85 percent extra on $300,000 is $2,550.
CPA and Tax Director
Trades inside a 401(k) carry no tax bill, so a swap isn't permanent. Rerun the comparison every February when the 1099s arrive.
CFP® and Lead Advisor
A saver separating at 55 from an employer plan can often draw penalty-free, but an IRA rollover brings back the 59½ wait. Decide that before you move the bonds.
Senior Financial Planner
Does the IRS tax bond interest the same in every account?
No. A taxable account taxes bond interest every year as ordinary income, a traditional IRA or 401(k) taxes nothing until you withdraw, and a Roth taxes nothing if its rules are met. For a bond fund, the account you pick sets the yearly tax bill.
In a taxable account, interest from corporate bonds and taxable bond funds counts as ordinary income for the year you receive it. Fund payouts show up on Form 1099-DIV in box 1a as nonqualified dividends; individual bonds report on a 1099-INT. States and localities can't tax Treasury interest, and the IRS doesn't tax most municipal bond interest. Those two are the bonds that can still make sense in taxable.
Inside a traditional IRA or 401(k), nothing is taxed while the money stays put. Every withdrawal is ordinary income later, whether the balance grew from interest, dividends or gains. So a municipal bond's tax exemption is wasted there. A Roth is tax-free if the rules are met, but Roth space is limited, and Modera Wealth Management saves it for the holding expected to grow the most, which is rarely a bond fund.
Now place yourself on the thresholds. The 3.8 percent net investment income tax (IRS Form 8960) starts above $200,000 of modified adjusted gross income for a single filer and $250,000 for joint filers, and those amounts aren't indexed. The IRS top rate of 37 percent starts above $640,600 single for 2026. Penalty-free IRA withdrawals start at 59½. Required minimum distributions start at 73, or 75 if you were born in 1961 or later.
Three accounts, one set of bonds
Thresholds that place you
| Feature | Taxable | Traditional 401(k) or IRA | Roth |
|---|---|---|---|
| Yearly federal tax bill | $5,238 | $0 | $0 |
| Tax at withdrawal | None on principal | Ordinary income | None if rules met |
| Tax form each year | 1099-DIV or 1099-INT | None while inside | None while inside |
| Use of growth space | Unlimited | Pre-tax space | Scarce Roth space |
| Municipal bond exemption | Useful | Wasted | Wasted |
The month after a share sale: seven checks and three calls
You sold company shares and put part of the cash into bonds. The first month afterward is the time to look at where each holding sits, before the next tax form arrives. Run these checks against your own statements.
Who owns each step of a swap? The plan administrator and your CPA each own one step, and two steps are dated by the tax calendar: one before the April return and one in February after the swap year.
Three calls are worth making. Ask the plan administrator which bond funds the plan offers, at what expense ratio, and whether partial withdrawals are allowed after you separate at 55. Ask your CPA how the move changes the net investment income tax and whether you claim the Treasury fund's state exemption. Ask your advisor whether the overall stock and bond mix stays the same after the swap.
Here is how a quiet mistake looks. A brother, trying to help, parked ESPP sale proceeds in a corporate bond fund in a taxable account. Nobody noticed for years. You catch it on the February 1099-DIV: if most of box 1a is nonqualified, bond interest is sitting in taxable.
Questions to put to three people
| Task | Who does it | When |
|---|---|---|
| Pull bond fund cost basis | You, from brokerage site | Before any sale |
| Confirm 401(k) bond fund cost | Plan administrator | Before the swap |
| Check NIIT and bracket effect | CPA | Before the April return |
| Place both trades | You or your advisor | Same market day |
| Read 1099-DIV box 1a | You | February after swap year |
- Bond funds held in taxable
- 401(k) bond fund and its expense ratio
- Whether MAGI tops $200,000 or $250,000
- Municipal bonds sitting in an IRA
- State income tax and Treasury funds
- Bonds held in the Roth
- When you'll need the cash
At 52, Heather's bond interest costs $5,238 a year in taxable
For illustration, take Heather, a hypothetical 52-year-old divorced engineering manager at a payments company. She buys the full ESPP amount every period and plans to leave in three years. Her $1.5 million sits in three places: $600,000 taxable ($300,000 in bond funds, $200,000 in ESPP shares, $100,000 in a stock index fund), $750,000 in her 401(k), all in a stock index fund, and $150,000 in a Roth, in a growth fund. Her income is well above the $200,000 single threshold for the net investment income tax.
Her $300,000 of bond funds yields an assumed 4.5 percent, so $13,500 annually. At an assumed 35 percent federal rate plus 3.8 percent, that's 38.8 percent, and $13,500 × 38.8 percent is a $5,238 federal tax bill. The first table above shows the same $300,000 in each account. The second lists the five steps of her swap, starting with pulling her bond fund cost basis.
After the swap, a stock index fund takes the bonds' place in taxable. At an assumed 1.5 percent yield it pays $4,500 of qualified dividends, taxed at an assumed 18.8 percent, which is $846. Her yearly tax bill falls from $5,238 to $846. She saves $4,392 annually, about $13,000 over her last three working years. That's a tax saving, not a forecast: stock and bond funds can both drop below what she put in. Plug your own balances and rates into our calculator to see your version.
Another hypothetical saver pays an assumed 12 percent rate, and the 401(k) bond fund charges 0.90 percent. Moving the bonds saves $1,620 of tax ($13,500 × 12 percent) but adds $2,550 in fees (0.85 percent extra on $300,000). That saver keeps a low-cost Treasury fund in taxable.
Heather still has one choice open: should she keep $100,000 of bonds in taxable as a bridge after she leaves at 55? It tips toward moving all of it if she leaves the 401(k) where it is, since withdrawals from that employer's plan are penalty-free when she separates in the calendar year she turns 55 or later. It tips toward keeping the bridge if she plans to roll the 401(k) to an IRA, which brings back the 59½ wait.
The swap in six steps
A saver who should stay put
Decision rule: if your federal rate on interest is 24 percent or higher and your 401(k) offers a bond fund costing under 0.30 percent, hold bonds there first and stock funds in taxable. At lower rates or with a costly plan fund, a low-cost Treasury fund in taxable can be the cheaper home.
- Taxable: $5,238 of federal tax bill annually
- Traditional 401(k) or IRA: $0 now, ordinary income when withdrawn
- Roth: $0 ever, but it uses the account best kept for growth
- Step 1: Pull the cost basis of the taxable bond funds; Modera Wealth Management looks at it before suggesting any trade, since a fund bought two years ago may sit at a small gain or loss
- Step 2: Confirm the 401(k) bond fund's expense ratio
- Step 3: Inside the 401(k), sell $300,000 of the stock index fund and buy the bond fund, with no tax bill
- Step 4: The same market day, sell the taxable bond funds and buy a stock index fund
- Step 5: Check that the overall mix is unchanged
- Step 6: Read the 1099-DIV the following February
Will the swap still fit after 55, a rate cut or a new tax law?
Yes, if you recheck it every year. Falling rates shrink the yield and the yearly saving, a health problem could force withdrawals before 59½, and Congress can change the net investment income tax thresholds or RMD ages.
Leave room: keep six to 12 months of spending in cash, rerun the three-account comparison each February when the 1099s arrive, and remember that trades inside a 401(k) carry no tax bill, so the bond fund can move again. Anyone who needs bond money before 59½ without the age-55 employer-plan exception may do better paying the yearly tax bill on some taxable bonds.
A bond-location review with Modera Wealth Management before the next trade
Send your three latest statements, and Modera Wealth Management will mark which holding would sit where and what the yearly tax bill looks like before and after. The result comes back as a one-page playbook. The fee is written into the agreement you sign before anything is reviewed.
A tax bill you see every February feels bigger than one you pay later, and that's why most savers underrate the 401(k) side of the trade.
What people ask about bonds in IRA or taxable
My employer's 401(k) only offers a stable value fund and a high-yield bond fund; what happens if I hold my bond allocation there instead of buying Treasuries in my brokerage account?
Interest inside the 401(k) isn't taxed each year, but withdrawals are ordinary income. A stable value fund is steady; a high-yield bond fund can swing like stocks. Check each fund's expense ratio. If the plan's choices are costly or riskier than you want, Treasuries in taxable may still be the better home.
My mom is 52 and leaving her job in three years; should her bonds sit in the 401(k) she might draw from at 55?
Often yes, if she leaves the money in that employer's plan. Withdrawals are penalty-free when she separates in the calendar year she turns 55 or later, though they're still taxed as ordinary income. Rolling the 401(k) to an IRA brings back the 59½ wait, so Modera Wealth Management would review that choice first.
Read the rules at the source
This is general information, not advice for your specific situation. Investing involves risk, including loss of principal. Nothing here replaces guidance from a tax professional or attorney. Talk to a qualified adviser before you act.