How can I rebalance without triggering a big tax bill?

Rebalance inside your tax-advantaged accounts first — selling in a 401(k), IRA, or Roth generates no taxable event, so you can shift between funds freely there. In taxable brokerage accounts, lean on these instead of selling: direct new contributions and dividends toward underweight assets, and use any tax-loss harvesting opportunities when a holding is down. If you must sell appreciated shares in taxable, favor lots held over a year for the lower long-term capital-gains rate, and consider donating appreciated shares to fund charitable gifts. Retirees can rebalance through their withdrawals by pulling from whatever's overweight. The big idea: do your forced selling where it's tax-free, and use cash flows rather than sales everywhere else. See wealthserene.com/tools/capital-gains to estimate the tax cost before selling appreciated holdings.