How can I rebalance tax‑efficiently?

## A Guide to Tax-Efficient Rebalancing

Your portfolio had a great year, and your stocks soared. The problem? Your careful 60/40 asset allocation now looks more like 70/30. This "drift" can significantly alter your portfolio's risk profile, potentially exposing you to more volatility than you're comfortable with.

Fixing this drift by selling your winners seems simple enough, but it comes with a sting: capital gains taxes. Thankfully, you can get your portfolio back on track without handing a big chunk of your returns to the IRS. This guide will explore several tax-efficient rebalancing strategies to help you maintain your desired asset allocation while minimizing your tax burden.

## Start in Your Tax-Advantaged Accounts

Your first stop for tax-free rebalancing should always be accounts like your [IRA or 401(k)](/blog/ira-vs-401k). Inside these retirement accounts, you can buy and sell assets without triggering a taxable event. This is because these accounts are either tax-deferred (like a traditional 401(k) or IRA) or tax-free (like a Roth 401(k) or IRA).

If your stocks are overweight, sell some of those winning shares inside your 401(k) and use the proceeds to buy bonds. For example, imagine your 401(k) is worth $100,000, and your target allocation is 60% stocks and 40% bonds. If your stocks have grown to $70,000 (70%), you can sell $10,000 worth of stock within your 401(k) and purchase $10,000 worth of bonds. This adjusts your overall asset mix across all your accounts, bringing you back to your target without a single tax form in sight.

**Common Mistake:** Many investors overlook the power of rebalancing within their tax-advantaged accounts first. They immediately focus on their taxable accounts, potentially triggering unnecessary capital gains taxes.

## Use New Money to Your Advantage

What if you'd rather not sell anything at all? You can rebalance simply by changing where your new money goes. This is a particularly useful strategy if you're still actively contributing to your investment accounts.

Direct any new contributions or dividends toward the parts of your portfolio that are underweight. For instance, if you contribute $1,000 a month and your bonds are lagging, put that entire $1,000 into your bond funds. Let's say your portfolio is 65/35 stocks/bonds and you want to get back to 60/40. If you contribute $500 per month, you could allocate the entire $500 to bonds for several months until the allocation shifts closer to your target. It’s a slower method, but it’s effective and completely tax-free.

**Actionable Tip:** Automate your contributions to underweight asset classes. Set up automatic transfers to ensure you consistently rebalance with new money.

## Put Investment Losses to Work

Nobody likes seeing red in their portfolio, but those losses can be valuable. With [tax-loss harvesting](/blog/tax-loss-harvesting-guide), you can sell an investment at a loss to cancel out gains from another. This strategy can significantly reduce your tax liability and even generate a tax deduction.

Let's say you realized a $4,000 gain from selling an overperforming stock. You could then sell a different investment that's down $4,000. The loss cancels out the gain, and your net capital gain becomes zero. You can even deduct up to $3,000 in losses against your regular income each year. If your losses exceed your gains by more than $3,000, you can carry forward the excess loss to future tax years.

**Example:** You sell Stock A for a $5,000 profit. You also sell Stock B for a $2,000 loss and Stock C for a $1,000 loss. Your net capital gain is $5,000 - $2,000 - $1,000 = $2,000. You only pay taxes on the $2,000 gain.

**Important Note:** Be mindful of the wash-sale rule (explained below) when tax-loss harvesting.

## Give Smarter and Sell Smarter

If you're charitably inclined, consider donating appreciated stock directly to a qualified charity. You get to deduct the full market value of the donation and completely avoid the capital gains tax you would have paid by selling it first. This is a win-win situation: the charity receives a valuable donation, and you reduce your tax burden.

When you do have to sell from a taxable account, be specific about which shares you're selling. By choosing to sell the lots you bought at the highest price (highest cost basis), you can minimize or even eliminate the taxable gain on the sale.

**Example:** You own 100 shares of Company X. You bought 50 shares at $10 per share and another 50 shares at $20 per share. The current market price is $30 per share. If you need to sell 50 shares, selling the shares you bought at $20 will result in a lower capital gain ($10 per share) compared to selling the shares you bought at $10 ($20 per share gain).

**Actionable Tip:** Keep meticulous records of your investment purchases, including the date and price of each purchase. This will make it easier to identify the shares with the highest cost basis when you need to sell. Many brokerages offer tools to help you track your cost basis.

## What to Watch Out For

Rebalancing the right way means avoiding a few common missteps.

*   **Over-Rebalancing:** Doing this too often can rack up transaction fees and potentially trigger short-term capital gains taxes (which are taxed at a higher rate than long-term capital gains). For most people, once or twice a year is plenty. Consider setting a threshold for rebalancing. For example, only rebalance if your asset allocation deviates by more than 5% from your target.
*   **The Wash-Sale Rule:** If you sell a security for a loss, you can't buy it back (or a "substantially identical" one) within 30 days before or after the sale. Doing so will disqualify the loss for tax purposes. Learn more about the [wash-sale rule here](/blog/wash-sale-rule-explained). "Substantially identical" means the same security or one that is very similar (e.g., buying shares in the same company through a different brokerage account).
*   **Gift Tax:** Gifting appreciated stock is a great strategy, but be mindful of the annual gift tax exclusion. For 2024, that limit is [$18,000 per recipient](https://www.irs.gov/businesses/small-businesses-self-employed/frequently-asked-questions-on-gift-taxes). If you gift more than $18,000 to one person in a year, you'll need to file a gift tax return (Form 709). While you likely won't owe any gift tax (due to the high lifetime gift and estate tax exemption), you'll still need to report the gift.

Keeping your portfolio aligned with your goals doesn't have to mean a bigger tax bill. By using your retirement accounts, directing new cash wisely, and taking advantage of losses, you can maintain your strategy while keeping more of your money invested and growing.

## Key Takeaways

*   **Prioritize Tax-Advantaged Accounts:** Always rebalance within your 401(k) and IRA accounts first to avoid triggering taxable events.
*   **Use New Contributions Strategically:** Direct new contributions and dividends to underweight asset classes to rebalance your portfolio gradually.
*   **Tax-Loss Harvesting is Powerful:** Sell losing investments to offset capital gains and potentially deduct up to $3,000 in losses against your ordinary income.
*   **Donate Appreciated Stock:** If you're charitably inclined, donate appreciated stock directly to a qualified charity to avoid capital gains taxes.
*   **Be Mindful of the Wash-Sale Rule:** Avoid buying back a security you sold for a loss within 30 days to ensure you can claim the tax deduction.
*   **Track Your Cost Basis:** Keep accurate records of your investment purchases to minimize capital gains when selling.
*   **Rebalance Periodically:** Aim to rebalance once or twice a year, or when your asset allocation deviates significantly from your target.