You can usually rebalance without paying tax by never selling a winner in a taxable account. Send new contributions and dividends to whatever is underweight, and do any actual selling inside IRAs, 401(k)s or HSAs, where trades aren’t taxed. If you must sell in a taxable account, pair gains with harvested losses, or time the sale for a year when your income sits in the 0% long-term capital gains bracket.
Below is the order to try these in, with the numbers that make each one work.
Why rebalancing matters more as you get close to FIRE #
Markets move your mix without asking. After a strong run, an 80/20 stock/bond portfolio can drift to 88/12 without a single trade. That’s more risk than you signed up for, at the exact moment you’re about to depend on the money.
Two reasons to take drift seriously:
- Sequence risk. A crash in the first years of retirement does the most damage, because you’re selling to live. If your portfolio drifted from a planned 70% stocks to 90%, a crash hits harder than your plan assumed. Our guide to sequence of returns risk shows how much the timing matters.
- Your real tolerance. Riding out a 30% drop is harder than filling out a risk questionnaire. Drift quietly raises the size of the drop you’ll face.
The catch is that the obvious fix, selling what went up, creates a capital gains bill in a taxable account.
Method 1: Steer new contributions (inflow rebalancing) #
While you’re still earning, this is the easiest method and usually enough on its own.
Say your target is 80% stocks, 20% bonds, and a $500,000 portfolio has drifted to $425,000 in stocks and $75,000 in bonds (85/15). You’d need $25,000 more in bonds to get back to 20% without selling. If you invest $2,500 a month, sending all of it to bonds for about ten months fixes the drift. Since the portfolio grows in the meantime, you may need a month or two more.
No sale, no tax, no transaction costs. It also makes you buy the asset that’s been lagging, which is the whole point of rebalancing.
Method 2: Redirect dividends and interest #
Turn off automatic dividend reinvestment in your taxable account and let payouts collect as cash. Every quarter, invest that cash in whatever is underweight. You owe tax on dividends either way, so redirecting them costs nothing extra.
A total-market index fund doesn’t yield much, so this is a slow lever, a few thousand dollars a year on a large portfolio. It matters more once you stop contributing. For the tax side of dividends, see minimizing dividend tax drag.
Method 3: Trade inside tax-advantaged accounts #
Trades inside a traditional or Roth IRA, 401(k), 403(b) or HSA never create a taxable event. That makes those accounts your “swing space.”
The trick is to think of all your accounts as one portfolio:
- Add up every account and figure your overall stock/bond split.
- If you’re overweight stocks, sell stock funds inside your IRA or 401(k) and buy bond funds there.
- Leave the taxable account alone.
Your taxable account can hold only stock index funds that you almost never touch, while the IRA carries most of the bonds and does all the adjusting. That setup is also good asset location, since bond interest is taxed as ordinary income and is better sheltered anyway.
The limit: if your tax-advantaged accounts are small compared with your taxable account, there may not be enough room to correct a big drift.
Method 4: Harvest losses to offset gains #
If you have to sell appreciated shares in a taxable account, look for positions trading below what you paid. Selling them realizes a loss that cancels out gains dollar for dollar. Leftover losses offset up to $3,000 of ordinary income a year ($1,500 if married filing separately), and anything beyond that carries forward indefinitely, per IRS Topic 409.
Two rules:
- Wash-sale rule. The loss is disallowed if you buy a substantially identical security within 30 days before or after the sale. That includes purchases in your IRA and automatic dividend reinvestments.
- Stay invested. Swap into a similar fund that tracks a different index, such as moving from an S&P 500 fund to a total-market fund, so you don’t sit in cash.
Loss harvesting works best in down years, which also happen to be when stocks are underweight and you’re more likely to be buying them.
Method 5: Sell in the 0% capital gains bracket #
This one is mostly for early retirees and people with a low-income year, such as a sabbatical.
For 2026, long-term gains are taxed at 0% when taxable income is at or below $49,450 for single filers or $98,900 for married couples filing jointly (IRS Rev. Proc. 2025-32). Taxable income is what’s left after the standard deduction, which is $16,100 single and $32,200 joint for 2026. A married couple with no wages could realize up to about $131,100 of long-term gains in 2026 and pay no federal income tax on them.
That means rebalancing in early retirement can be free. You sell the overweight fund, pay 0%, and buy what’s underweight. Even if you don’t need to rebalance, you can sell and immediately rebuy to reset your cost basis higher (“tax-gain harvesting”). The wash-sale rule doesn’t apply to gains.
Watch two things. Realized gains count toward ACA marketplace income, which can shrink your health insurance subsidy (see health insurance in early retirement). And most states tax capital gains as ordinary income.
Method 6: Give appreciated shares instead of cash #
If you donate to charity, give your most appreciated shares from the overweight asset instead of cash. You avoid the gain entirely, and if you itemize you can generally deduct the fair market value of shares held more than a year, subject to AGI limits. Then use the cash you would have donated to buy the underweight asset. A donor-advised fund makes this easy if the charity can’t take stock directly.
A step-by-step order to follow #
| Step | Action | Tax cost |
|---|---|---|
| 1 | Total your allocation across every account | None |
| 2 | Compare to your target and your rebalancing band | None |
| 3 | Point new contributions and cash dividends at the underweight asset | None |
| 4 | If that’s not enough, trade inside IRAs, 401(k)s or HSAs | None |
| 5 | If you must sell in taxable, harvest losses first | Usually none |
| 6 | Sell gains in a 0% bracket year, or sell long-term lots with the highest basis | Low to moderate |
How often should you rebalance? #
Two common approaches:
- Calendar: check once a year, on a date you’ll remember, and rebalance if you’re meaningfully off.
- Bands: rebalance only when an asset drifts past a threshold. The “5/25” rule popularized by Larry Swedroe triggers a rebalance when a large holding moves 5 percentage points (a 60% target outside 55% to 65%), or a small holding moves 25% of its target (a 10% target outside 7.5% to 12.5%).
Checking more than a few times a year mostly adds trades without improving results. If your mix is a simple three-fund setup, the three-fund portfolio guide shows sensible targets.
Keep the plan and the date in view #
Rebalancing is how you keep the risk you planned for, and that risk shows up in your projections. Retire Goals doesn’t read your holdings or suggest trades, but it does connect the mix you choose to the date you care about. Set a goal’s expected return to match your allocation (lower for a bond-heavy mix), and its Monte Carlo outlook shows the odds you reach your target at that return. It infers volatility from the return, so a higher expected return also carries a wider range. Lowering the return after a big shift into bonds shows you honestly how much later your date moves.
Frequently asked questions #
How often should I rebalance my FIRE portfolio? #
For most people, once a year, or whenever an asset class moves outside a set band such as 5 percentage points. More frequent rebalancing adds trading and tax friction with little benefit.
Do I owe taxes when I rebalance inside my 401(k) or IRA? #
No. Buying and selling inside traditional or Roth IRAs, 401(k)s, 403(b)s and HSAs doesn’t create a taxable event. Taxes apply only when money comes out of a traditional account.
Should I rebalance during a stock market crash? #
A crash pushes your stock share below target, and rebalancing means selling bonds to buy stocks at lower prices. Doing that inside tax-advantaged accounts costs nothing. It’s emotionally hard, which is why a written rule decided in calm markets helps.
How do I rebalance in Coast FIRE with no new contributions? #
Without new money, use cash dividends, trades inside your retirement accounts, and, if you’re in a low-income year, sales in the 0% capital gains bracket. Your coast math assumes a particular mix, so letting it drift for years changes your risk as well as your expected growth.