Your Interactive Financial Planning Guide · fp4ya.com
Section 4 of 7
Tax Planning
Most young adults think tax planning is only for the wealthy. It isn't. There are real strategies available right now, some of them worth thousands of dollars, that only work when your income is lower. These tools help you find and use them.
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Capital Gains Harvesting Calculator
The 0% capital gains rate is one of the best tax strategies nobody talks about.
Long-term capital gains (investments held over one year) are taxed at a preferred rate, and if your taxable income is low enough, that rate is 0%. You can sell appreciated investments, pay zero tax on the gains, and immediately buy them back at the new higher price. Your future tax bill just shrunk for free. This is called capital gains harvesting, and it's one of the most underutilized strategies for young adults.
Who this works for: Anyone with a taxable brokerage account who has unrealized long-term gains and whose income falls in the lower tax brackets. The 0% bracket is more accessible than most people realize, especially early in a career.
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Tax Loss Harvesting, the Flip Side
If you have unrealized losses in your taxable account, you can sell those positions to realize the loss, use it to offset gains, and if losses exceed gains, deduct up to $3,000 against ordinary income per year. The remaining excess carries forward to future years.
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Wash sale rule: You cannot buy back the same or substantially identical security within 30 days before or after the sale, or the loss is disallowed. To stay invested, you can buy a similar but not identical fund (e.g., sell VTI and buy ITOT, both are US total market ETFs from different providers).
Short-term gains: This calculator covers long-term capital gains only (investments held more than one year). Short-term gains — held one year or less — are taxed at your ordinary income rates, just like wages.
Note: These calculations use 2026 tax brackets. Always confirm gains/losses with your brokerage's cost basis report before executing any trades.
Debunk the most expensive myth in personal finance.
One of the most persistent money myths: "If I earn more, I'll move into a higher bracket and take home less." This is false, and believing it can cause people to turn down raises and avoid earning opportunities. The US tax system is progressive: only the income above each threshold is taxed at the higher rate. This visualizer shows exactly how that works for your income.
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Tax-Advantaged Account Stacking
See how 401(k) + HSA contributions lower your tax bill today.
Every pre-tax dollar you contribute to a Traditional 401(k) or HSA directly reduces your taxable income, which means less tax owed right now. Stack these accounts together and the savings add up fast. This tool shows the coordinated tax impact of your contributions across all accounts.
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About Your Roth IRA Contribution
The full picture: Traditional 401(k) and HSA contributions save you taxes today. Your Roth IRA contribution doesn't save taxes today, but it protects all future growth from taxes forever. Both strategies have a role, use the Roth vs. Traditional tool in Section 3 to determine the right mix for your situation.
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Year-Round Tax Action Checklist
Tax planning isn't just for April, these habits save money all year.
Most people only think about taxes in March and April. But the moves that actually reduce your tax bill happen throughout the year. Check off what you've done and make a plan for what you haven't.
January–March
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Gather all tax documents (W-2, 1099s, student loan interest statements)
Your employer must provide a W-2 by January 31. Brokerage 1099s typically arrive by mid-February.
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Contribute to your IRA for the prior tax year (deadline: April 15)
You have until April 15 to make IRA contributions for the previous year. This is extra time that most people don't use.
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Check your W-4 withholding, adjust if needed
If you got a large refund last year, adjust your W-4 to withhold less. If you owed a lot, withhold more. Goal: close to $0.
Spring & Summer
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Review your taxable brokerage account for harvesting opportunities
Mid-year is a good time to check for unrealized gains or losses and plan your harvesting strategy before year-end rush.
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Max out your HSA if you have an HDHP
HSA contributions can be made any time during the year. Spreading them evenly throughout the year is fine.
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Increase 401(k) contribution if you received a raise
When your salary increases, your tax bracket may shift. Increasing pre-tax contributions can help keep you in a lower bracket.
Fall (October–December)
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Execute capital gain or loss harvesting before December 31
Year-end is the deadline for any gain/loss harvesting to count for that tax year. Don't wait until December 30, trades need time to settle.
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Review open enrollment, adjust health plan and HSA/FSA elections
Open enrollment typically runs October–November. This is your one annual chance to change your benefit elections.
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Spend down your FSA balance (use-it-or-lose-it, check your plan rules)
FSA funds often expire December 31. Some plans have a grace period or $610 rollover limit. Check your plan and spend accordingly.
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Maximize 401(k) contribution to the annual limit before December 31
The 401(k) contribution deadline is December 31 (not April 15 like IRAs). Adjust your final paychecks of the year if you're close to the limit.