Rebalancing Without Selling: The Tax-Friendly Way

When you sell a capital asset, the difference between your adjusted basis (generally your cost) and the amount you received is a capital gain or loss. Sell fund shares for more than you paid, and the difference is a gain. In a taxable account, you report sales like this on your tax return (Form 8949 and Schedule D).

Fidelity puts it this way: rebalancing within a brokerage account "can trigger tax consequences if you are selling part of a position." The SEC and FINRA suggest checking whether a sale will trigger capital gains or other taxes before you sell.

Two things set the rate: how long you held the asset, and your taxable income.

• Held one year or less: the gain is short-term and taxed as ordinary income at graduated rates.
• Held more than one year: the gain is long-term and taxed at 0%, 15% or 20%, depending on your taxable income.

The IRS's 2026 inflation adjustments set these long-term thresholds:

The 20% rate applies to the extent your taxable income exceeds the 15% threshold.

Higher earners can owe an extra 3.8% net investment income tax on investment income, including net gains from selling stocks, bonds and mutual funds. It applies to the lesser of your net investment income or the amount your modified adjusted gross income exceeds $200,000 (single or head of household), $250,000 (married filing jointly) or $125,000 (married filing separately).

Here are the main tools, from least to most intrusive. Rebalancing comes down to two paths: sell and buy, or use new money, either all at once or through regular contributions. Tools 1 to 4 build on the second path. Tool 5 keeps the first path (selling) but removes most of its tax cost.

1. Steer new contributions. The SEC and FINRA describe adjusting your allocations so more of your ongoing contributions flow to underweight categories until the mix is back on target. Fidelity says new contributions might let you restore your targets without selling any positions, which can help you avoid triggering taxes in a brokerage account. Bernstein calls the same idea "soft rebalancing" and says it can reduce transaction costs and, in taxable accounts, potential tax consequences.

2. Redirect dividends and interest. Vanguard suggests moving dividends and interest to the underweight asset classes instead of buying and selling. Funds pass their dividend income through to you, and it's taxable whether you take it as cash or reinvest it. Sending it to a different fund doesn't change the tax owed on the dividend itself.

3. Take withdrawals from the overweight side. When you need to withdraw money, Vanguard says to start with the overweight asset classes. Selling creates a gain only if the shares have gained, so this works best when the overweight holding has high-basis lots.

4. Rebalance only part of the way. Vanguard notes that a partial rebalance, focused on asset classes that are far off target or on shares with a higher cost basis in taxable accounts, limits both taxes and transaction costs. Bernstein's analysis suggests that moving an out-of-balance holding about halfway back toward its target can capture much of the benefit with less trading.

5. Do the selling inside a retirement account. Money in a traditional IRA, including earnings and gains, generally isn't taxed until you take a distribution. For a 401(k), distributions including earnings are included in taxable income at retirement, except for qualified distributions from designated Roth accounts. Qualified distributions from a Roth IRA are tax-free if the requirements are met. Fidelity states that rebalancing within a tax-advantaged account, including 401(k)s and traditional and Roth IRAs, doesn't generate tax consequences. Check your plan's rules and your own situation, and keep the wash sale rule below in mind. For 2026, the employee contribution limit is $24,500 for a 401(k) and $7,500 for an IRA.

Worked example: sell or steer? (illustrative)

This is a made-up taxable account to show the arithmetic. Prices and tax figures are illustrative.

Target: 60% stocks, 40% bonds. Today: stocks $33,000, bonds $17,000, total $50,000. Stocks are 66% and bonds are 34%.

Route 1: sell. Sell $3,000 of the stock fund and buy $3,000 of the bond fund. That restores 60/40 (stocks $30,000, bonds $20,000). Suppose the shares you sold cost $2,000, so the realized gain is $3,000 - $2,000 = $1,000. Assume a single filer with $70,000 of taxable income before this gain:

• If you held the shares more than a year, $70,000 is above $49,450 and below $545,500, so the long-term rate is 15%. Tax: $1,000 x 15% = $150.
• If you held them a year or less, the gain is taxed as ordinary income. $70,000 sits in the 22% bracket (over $50,400, up to $105,700), and $71,000 stays in it. Tax: $1,000 x 22% = $220.

Route 2: steer new money. Add $5,000 and put all of it in bonds. Bonds become $22,000, the total is $55,000, and stocks are $33,000 / $55,000 = 60%. Tax from the rebalancing trade: $0, because nothing was sold.

The catch is that Route 2 needs $5,000 of new money. At $2,000 a month, and assuming markets stood still (they won't), it plays out like this:

If the drift is large, you have little new money, or one holding has grown so much that it dominates the portfolio, contributions alone may take too long. Fidelity notes that rebalancing can get complicated in a taxable account. Selling can also be the right call for reasons unrelated to rebalancing, such as a change in your view of a holding or a need for cash. Contributions are the default and usually the cheaper route, not an absolute rule.

If you do sell in a taxable account, a few rules matter:

• Choose which shares you sell. If you can adequately identify the shares you sold, your basis is the cost of those particular shares. If you can't, the basis is that of the shares you bought first. Vanguard points to higher-cost-basis shares as the focus in taxable accounts. Ask your broker how to specify lots.
• Watch the one-year line. Waiting past one year can move a gain from ordinary rates to the long-term rates above.
• Know the wash sale rule. If you sell at a loss and, within 30 days before or after, buy substantially identical securities, you can't deduct that loss. The rule also applies if you buy substantially identical stock for your IRA or Roth IRA. The disallowed loss is generally added to the cost of the new shares, except when the replacement is bought in an IRA. Net capital losses beyond your gains can offset up to $3,000 of other income a year ($1,500 if married filing separately).
• Remember fund distributions. A mutual fund or ETF can pay capital gain distributions, which you report as long-term gains no matter how long you held the fund.

The work in this approach is the bookkeeping: which holding is furthest below its target, how to split this month's contribution so the underweight ones get filled first, and when a purchase would push a holding past its target. Allocta is built around this buy-only logic. You enter the amount, it lists what to buy, and it doesn't suggest selling.