Tax Strategies

Most people treat taxes as something that happens to them. The families that build lasting wealth treat the tax code as a system with levers they can pull in their favor — legally, consistently, and starting early. The same income with different tax treatment produces dramatically different long-term wealth.

How Income Tax Works

Start with the misconception that costs people real money: moving into a higher tax bracket does not tax all of your income at the higher rate. The U.S. system is progressive — each bracket taxes only the dollars that fall inside it. A raise that “pushes you into the next bracket” raises the tax on those new dollars only. Nobody has ever lost money by earning more salary, and any decision made to “stay out of the next bracket” is a decision built on a myth.

Two rates describe your situation: your marginal rate (the tax on your next dollar — the number that matters for Roth-versus-Traditional decisions) and your effective rate (total tax divided by total income — always lower, and the number that describes your actual burden). On top of federal income tax sit state income tax, where your state has one, and FICA — the 7.65% for Social Security and Medicare that comes out of every W-2 paycheck before you see it.

Tax-Advantaged Accounts

Every account you will ever invest through gets one of three tax treatments:

• Tax-deferred — Traditional 401(k) and IRA. Deduct now, pay ordinary income tax at withdrawal.
• Tax-free — Roth IRA, Roth 401(k), and the HSA for qualified expenses. After-tax money in, never taxed again.
• Taxable — a standard brokerage or savings account. No special treatment, total flexibility.

The order in which you fill them matters enormously, and holding all three gives you the freedom to manage your own tax bracket in retirement. That is the whole of it at this level. Account-by-account detail, the 2026 contribution limits, the kids’ accounts, and the funding-order waterfall have a lesson of their own in Investing 104: Tax-Advantaged Accounts, with the employer-plan landscape in Investing for Retirement.

Traditional vs. Roth: Which to Choose

The whole decision is one question: is your marginal rate higher today, or will it be higher when you withdraw? Pay the tax in whichever era is cheaper. Roth wins in a low bracket now against a higher one later, Traditional wins in peak earning years, and splitting the difference is a legitimate hedge when you cannot call it. That reasoning is worked through age by age in Tax-Advantaged Accounts. What belongs here are the three moves that exist once the ordinary answer runs out.

The backdoor Roth

Above the Roth income phase-outs you cannot contribute directly, but you can make a non-deductible Traditional IRA contribution and convert it to Roth. The trap is the pro-rata rule: the taxable share of any conversion is computed across the combined balance of all your Traditional, SEP, and SIMPLE IRAs, not just the account you converted. If you already hold a large pre-tax IRA, most of the conversion is taxable and the maneuver stops being free. Workplace 401(k) balances are excluded from that calculation, which is why people with big rollover IRAs sometimes roll them into a 401(k) first.

The mega backdoor Roth

The bigger, less-known version. Beyond the $24,500 you can defer into a 401(k), the tax code allows total annual additions to the plan — your deferrals, the employer match, and any after-tax (non-Roth) contributions — of up to $72,000 in 2026.[1] The gap between what you and your employer put in and that ceiling is space you may be able to fill with after-tax dollars and then move to Roth.

Worked through: defer the full $24,500 and receive a $10,000 match, and $37,500 of room remains. Contribute that as after-tax money, convert it to Roth, and you have moved five times the IRA limit into a tax-free account in a single year.

Two conditions decide whether it is available to you at all, and both live in your plan documents rather than the tax code:

• The plan must permit after-tax contributions as a separate category — not Roth deferrals, which are different and already counted in your $24,500.
• The plan must allow you to get that money into Roth, through either an in-plan Roth conversion or an in-service withdrawal to a Roth IRA. Without one of the two, the after-tax money simply sits there growing on a taxable basis, which is worse than a brokerage account.

Convert quickly once the money is in. Earnings on after-tax contributions accrue pre-tax and are taxable when converted, so a plan offering automatic or daily conversion is meaningfully better than one requiring a phone call each quarter. Many plans — probably most small ones — offer none of this. Search your Summary Plan Description for “after-tax” before you plan around it.

The Roth conversion ladder

Used by early retirees: in deliberately low-income years between leaving work and claiming Social Security, convert Traditional money to Roth a bracket-full at a time, paying tax at rates you may never see again. Each converted amount has its own five-year clock before it can be withdrawn penalty-free, which is what makes it a ladder rather than a single move.

All three carry edge cases and ordering rules worth paying someone to get right the first time — CPA territory, below.

The HSA Triple Tax Advantage

The HSA is the only account in the code with three simultaneous tax benefits — pre-tax in, tax-free growth, tax-free out for qualified medical expenses — and for many families maxing it belongs immediately after the employer match, ahead of additional Roth contributions. The 2026 limits, the high-deductible-plan requirement, and the case for leaving it invested are in Tax-Advantaged Accounts; plan-selection trade-offs are in Young Adult Years.

The part that belongs on a tax-strategy page is the one most people miss: there is no deadline for reimbursing yourself. A qualified medical expense you pay out of pocket today can be reimbursed from the HSA in any later year, tax-free, with no time limit — provided the expense was incurred after the HSA was established and you never claimed it as an itemized deduction.[2]

That turns the account into something unusual: a tax-free balance you can compound for decades, backed by a growing reserve of receipts you can draw against at any moment. Pay this year’s $3,000 of bills from cash, keep the paperwork, let the HSA ride for twenty years — and you retain the right to withdraw that $3,000 tax-free whenever you want it, from a balance that has quadrupled in the meantime.

The catch is entirely administrative, and it is the reason to raise it here: the strategy is worth exactly as much as your records. Keep the EOBs and the receipts, log what you paid out of pocket each year, and store it somewhere that survives changing jobs, insurers, and HSA custodians. Nobody is tracking this for you, and an undocumented reimbursement is a taxable distribution with a 20% penalty attached if you are under 65. See Keep Your Own Records below.

After 65 the penalty disappears and non-medical withdrawals are simply taxed like a Traditional IRA, so nothing ever gets stranded. One thing to check while you are in the plan documents: many employers seed the account with a lump sum or match your contributions, and that money counts against the same annual limit — so if you are contributing to the maximum, find out what they are adding before you overshoot it.

The Standard Deduction vs. Itemizing

For 2026 the standard deduction is $16,100 single / $32,200 married filing jointly / $24,150 head of household, with additional amounts at 65+. Itemizing only makes sense when your deductible expenses — mortgage interest, state and local taxes (the SALT cap is $40,400 for 2026, phasing down above roughly $505,000 of income and scheduled to revert to $10,000 in 2030)[3], charitable giving, large unreimbursed medical costs — exceed that threshold. Most people under 40 do not itemize, and that is perfectly fine; it means the simple path is also the optimal one.

If you hover near the line, learn the bunching strategy: concentrate two years of charitable giving into one tax year to clear the standard deduction, then take the standard deduction the next. Same generosity, more deduction.

Tax Changes at Life Milestones

• Getting married: filing jointly almost always beats filing separately. Combine incomes, check the new bracket math, and update both W-4s immediately — the year-end surprise comes from withholding as two singles all year.
• Having children: the Child Tax Credit is $2,200 per qualifying child for 2026 (up to $1,700 refundable), and both child and parent now need Social Security numbers to claim it. Add the Child and Dependent Care Credit if you pay for care, update the W-4 — and open the 529 while you are at it; the 15-year rollover clock starts at opening.
• Buying a home: mortgage interest and property taxes (within the SALT cap) may finally push you past the standard deduction — run the itemizing math fresh.
• Changing jobs: watch withholding across two employers, and roll the old 401(k) over directly (trustee-to-trustee) — an indirect rollover mishandled becomes a taxable distribution with penalties.
• Death or divorce: update beneficiaries on every account immediately; beneficiary designations override wills. Splitting an employer retirement plan in a divorce requires a QDRO — a Qualified Domestic Relations Order, the court order that directs a 401(k) or pension to pay part of one spouse’s benefit to the other.[4] It is what makes the transfer a division of property rather than a taxable distribution to the participant; without one, a plan legally cannot pay the ex-spouse, and money withdrawn to hand over instead is taxed, and penalized, to the person who withdrew it. IRAs are the exception — they split under a divorce decree as a “transfer incident to divorce,” no QDRO required. Both events are firmly in CPA territory.

Capital Gains and Investment Taxes

Sell an investment held one year or less and the gain is taxed as ordinary income at your marginal rate. Hold it longer than one year and it becomes a long-term capital gain taxed at 0%, 15%, or 20% depending on income — for most working families, 15%, and for lower-income years, genuinely 0%. Qualified dividends get the same preferential rates. This is the tax code paying you to be patient, and it is one more reason the buy-and-hold portfolio from Building a Portfolio beats trading: the trader pays ordinary rates on every win, every year; the holder defers everything and pays the discount rate decades later, if ever.

None of this applies inside retirement accounts — trades inside a 401(k), IRA, or HSA trigger no tax. The rules above belong to the taxable brokerage layer.

Keep Your Own Records: Basis and Contributions

This is the least glamorous section on the page and probably the one that saves the most money. Several of the best features of these accounts — tax-free access to your own contributions, a reimbursement you can claim decades later, not paying tax twice on the same dollar — are available only if you can prove what you put in. Nobody is keeping that proof for you. Custodians get acquired, statements age out of online portals after seven years, employers change plan providers, and the burden of showing what a dollar already cost you in tax sits entirely with you.

What to track, and why each one matters:

• Roth IRA contributions. You can withdraw your contributions — not earnings — at any age, tax-free and penalty-free, because that money was already taxed.[5] This is what makes a Roth double as a backstop emergency reserve. But the custodian reports only the current year on Form 5498; if you opened the account in 2014 and switched brokers twice, reconstructing your basis is on you. Keep a single running total.
• Non-deductible Traditional IRA contributions. Reported on Form 8606, and the form is the only thing standing between you and paying income tax a second time on money you already paid it on. This matters most to anyone doing a backdoor Roth — that entire strategy runs through Form 8606 every year.
• HSA out-of-pocket medical expenses. The reimbursement-at-any-time strategy above is only as good as the receipts and EOBs behind it.
• Taxable brokerage cost basis. Brokers have reported basis on shares bought since 2012, so most of this is handled — but basis can arrive incomplete when you transfer accounts between firms, and inherited or gifted shares follow different rules entirely. Check it after any transfer, while the old broker still has records.
• 529 contributions. Only earnings are taxable in a non-qualified withdrawal; your contributions come back untaxed. Knowing the split turns a scary-sounding withdrawal into a manageable one.

Tax-Loss Harvesting

In a taxable account, an investment showing a loss can be sold to realize that loss, which offsets capital gains dollar-for-dollar — plus up to $3,000 of ordinary income per year, with the remainder carried forward. The constraint is the wash-sale rule: buy back the same or a substantially identical security within 30 days and the loss is disallowed. The standard maneuver is swapping into a similar-but-not-identical fund — one S&P 500 fund for a total-market fund — keeping market exposure through the window.

Honest scoping: this strategy matters for investors with meaningful taxable accounts and gains to offset. It is irrelevant inside a Roth or 401(k), and it is never a reason to own investments you did not want anyway. A useful lever; not a lifestyle.

The Kiddie Tax — Children’s Investment Income

Unearned income — dividends, interest, capital gains — in a child’s UTMA or custodial account gets special treatment: for 2026, the first $1,350 is tax-free, the next $1,350 is taxed at the child’s rate, and everything above $2,700 is taxed at the parent’s marginal rate. The rule applies until the child is 19, or 24 if a full-time student. Congress closed the obvious loophole before your kids were born.

The strategy consequence for the accounts in How to Invest for Your Child from Birth: keep children’s taxable accounts in low-turnover index funds, which distribute little each year and defer gains until sale — ideally in a year when the child’s own rate applies. And remember the kiddie tax touches unearned income only; a child’s wages and lemonade-stand earnings are taxed at their own (usually zero) rate, which is what makes the custodial Roth IRA so powerful.

Taxes for the Self-Employed

Side income changes your tax life: self-employment tax of 15.3% (both halves of FICA), quarterly estimated payments, Schedule C deductions for legitimate business expenses, and — the upside — the SEP IRA and Solo 401(k), the most powerful tax-reduction accounts available to high side-income earners. The full treatment lives in Side Income and Self-Employment Tax; if your child’s neighbor jobs grow into a real business, those rules eventually apply to them too.

Filing Tips and Common Mistakes

• File free if you can: IRS Free File covers most incomes, and VITA provides free preparation for qualifying households.
• The IRA deadline is generous: you can contribute for the prior tax year until the April filing deadline — a second chance every spring to fill unused Roth space.
• Keep organized records — digital is fine, backed up and findable. The one-page ledger we keep for the kids’ earned income is the same habit at family scale; the basis records above are the version that pays you back directly.
• The common mistakes: unreported side income (the IRS receives the 1099 even when you misplace it), missed W-4 updates after life events, forgotten student loan interest deductions, and — most expensive per dollar of effort — missing the Saver’s Credit, worth up to 50% of retirement contributions as a credit, not a deduction, for low-to-moderate incomes. Young adults early in their careers qualify more often than they check.

Two of our own worksheets do the record-keeping half of this for you: the Paycheck Tracker reconciles what was withheld against what you expected, which is where a wrong W-4 shows up first, and the Monthly Bill Tracker collects the deductible categories — charitable giving, medical, state and local taxes — you would otherwise reconstruct from memory each April. The full set is in Worksheets & Planners.

When to Hire a CPA

A good CPA pays for themselves in specific situations: your first year of self-employment, a large capital-gains event, multi-state income, an inherited account, a divorce, or several life milestones landing in a single year. Know the difference between credentials — a CPA is licensed and broadly trained, an Enrolled Agent is federally licensed specifically for tax, and an unlicensed “tax preparer” may be neither. Ask how they handle your situation specifically, and prefer the professional who understands your full financial picture year-round over one who only appears in April. For ordinary W-2 years with the standard deduction, software is fine — pay for help when complexity arrives, not before.

Final Thought

Tax strategy is not about loopholes. Every account and credit on this page exists because Congress deliberately chose to reward saving, investing, raising children, and building families — using them fully is not aggressive tax planning, it is the system working exactly as designed. The family that pulls these levers consistently for thirty years ends up with dramatically more — not because they earned more, but because they kept more of what they earned. The author of Early Life Investments is not a CPA or Certified Financial Planner; confirm current-year limits at IRS.gov and consult a professional for your specific situation.