Max Out Retirement Contributions First

This is the lowest-hanging fruit, and it’s surprising how many people leave money on the table. Every dollar you put into a traditional 401(k) or SEP-IRA reduces your taxable income dollar for dollar. For 2025, the 401(k) employee deferral limit is $23,500, with a $7,500 catch-up if you’re 50 or older. That’s $31,000 you can shelter before touching anything else.

Self-employed? The Solo 401(k) lets you contribute as both employee and employer, up to $70,000 total (or $77,500 with catch-up contributions). A SEP-IRA allows employer contributions of up to 25% of net self-employment income, capped at $70,000. These numbers are large enough to meaningfully shift your tax bracket.

Don’t forget the HSA if you’re on a high-deductible health plan. The 2025 limit is $4,300 for self-only coverage and $8,550 for family. An HSA is the only account that gives you a deduction going in, tax-free growth, and tax-free withdrawals for medical expenses. It’s triple-tax-advantaged, which is a phrase that actually means something here.

Pick the Right Business Entity

Entity selection is the single most impactful tax decision many business owners make, and it’s also the one most people get wrong by waiting too long. If you’re a sole proprietor earning over $60,000–$80,000 in net profit, you’re paying 15.3% self-employment tax on every dollar. An S-corp election lets you split that income between a reasonable salary (subject to payroll taxes) and distributions (not subject to self-employment tax).

A freelancer earning $150,000 who pays themselves a $70,000 salary saves roughly $12,000 in self-employment tax compared to running as a sole proprietor. That’s real money — not a rounding error. The tradeoff is payroll complexity, quarterly filings, and the need to set a salary the IRS considers “reasonable.” But for most people above that income threshold, the math works decisively in favor of the S-corp.

The deadline to file Form 2553 for S-corp election is March 15 (or within 75 days of forming the entity). Miss it and you’re waiting until the following year, paying full SE tax in the meantime.

Time Your Income Strategically

Our tax system is progressive — the more you earn in a single year, the higher the rate on your last dollar. If you have control over when income hits your return, you can smooth it across years to stay in lower brackets.

A consultant who bills $300,000 in December but doesn’t collect until January has just moved that income into the next tax year (assuming they’re on the cash basis). A business owner expecting a lower-income year ahead might accelerate deductions into the current year and defer revenue into the next one. The reverse works too: if you’re in a temporarily low bracket — maybe you took a sabbatical or had a business downturn — that’s the year to recognize income, convert a Roth IRA, or sell appreciated assets.

Timing doesn’t change how much you earn. It changes when you’re taxed on it, and at what rate.

Bunch Your Itemized Deductions

The 2025 standard deduction is $15,000 for single filers and $30,000 for married couples. If your itemized deductions hover near those thresholds, you’re getting almost no benefit from them in a normal year. Bunching solves this.

The idea: concentrate two years’ worth of charitable contributions, medical expenses, or state tax payments into a single year. In the “bunching” year, you itemize and exceed the standard deduction significantly. In the off year, you take the standard deduction. Over a two-year cycle, you deduct more total dollars than if you spread expenses evenly. With OBBBA §70410 raising the SALT deduction cap to $40,000 for 2025-2029 (with a phase-down above $500,000 MAGI), more taxpayers can now claim meaningful state and local tax deductions — which makes the bunching math even more favorable.

Donor-advised funds make bunching charitable giving painless. You contribute a large lump sum to the DAF (taking the full deduction in that year), then distribute grants to your chosen charities over the following months or years. You get the tax benefit up front without changing your giving pattern.

Use Tax-Loss Harvesting in Your Portfolio

Tax-loss harvesting means selling investments at a loss to offset capital gains. If your losses exceed your gains, you can deduct up to $3,000 against ordinary income per year, with the rest carrying forward indefinitely.

The mechanics are simple. You sell a position that’s down, book the loss, and reinvest in something similar (but not “substantially identical” — that triggers the wash sale rule under IRC Section 1091 and disallows the loss). The 30-day wash sale window applies to purchases both before and after the sale, so you need to plan around it.

Where this gets interesting: in a year with a large capital gain — say you sold a rental property or exercised stock options — harvesting losses across your portfolio can directly offset that gain and save you 20% or more in federal tax. For high earners, the 3.8% NIIT stacks on top, making harvested losses even more valuable.

Hold Investments Long Enough for Preferred Rates

Long-term capital gains (assets held more than one year) and qualified dividends are taxed at 0%, 15%, or 20%, depending on your income. For a married couple in 2025, the 0% bracket covers taxable income up to roughly $96,700. That means a retiree with $90,000 in taxable income could realize long-term gains completely tax-free.

Short-term gains, by contrast, are taxed at ordinary income rates — up to 37%. The difference between holding a stock for 11 months versus 13 months could be a 22-percentage-point swing in your tax rate on that gain. Patience has a measurable return.

Hire Your Kids in the Family Business

If you run a sole proprietorship or a husband-wife partnership, wages paid to your children under age 18 are exempt from Social Security and Medicare taxes under IRC Section 3121(b)(3)(A). The child can earn up to the standard deduction amount ($15,000 in 2025) and pay zero federal income tax. You get a business deduction, the child gets earned income they can contribute to a Roth IRA, and FICA is off the table entirely.

The work has to be real, the pay has to be reasonable for the services performed, and you need to actually issue payments (not just journal entries). The IRS looks at this, especially when the child is very young. A 10-year-old doing legitimate filing, cleaning, or social media work is defensible. A 3-year-old “modeling” for your dental practice is not.

Roth Conversions in Low-Income Years

A Roth conversion means moving money from a traditional IRA to a Roth IRA. You pay income tax on the converted amount now, but all future growth and withdrawals are tax-free. The strategy makes sense when your current tax rate is lower than what you expect to pay in retirement.

The best conversion windows are years when your income dips — between jobs, early retirement before Social Security kicks in, a business loss year, or a year with large deductions. Converting just enough to fill up your current bracket costs you tax at today’s lower rate and permanently removes that money from future required minimum distributions.

Don’t convert blindly. Every dollar you convert is added to your AGI that year, which can trigger phaseouts, push you into a higher Medicare premium bracket (IRMAA), or subject more of your Social Security benefits to taxation. The math needs to be run specifically for your situation.

Real Estate Strategies That Actually Work

Real estate offers tax benefits that almost no other asset class matches. Depreciation lets you deduct the cost of a building over 27.5 years (residential) or 39 years (commercial), creating paper losses that offset rental income even when the property is cash-flow positive. Cost segregation studies can accelerate that depreciation, front-loading deductions into the early years of ownership.

A 1031 exchange lets you sell an investment property and defer all capital gains tax by reinvesting the proceeds into a like-kind replacement property. There’s no limit on how many times you can do this — investors have chain-exchanged their way through decades of appreciation without paying a dollar in capital gains tax along the way.

And if you hold the property until death, your heirs get a stepped-up basis, which means the deferred gain evaporates entirely. That’s not a loophole — it’s Section 1014 of the Internal Revenue Code, and it’s been there since 1954.

Charitable Giving Beyond Cash

Donating appreciated stock directly to a charity (or to a donor-advised fund) avoids capital gains tax on the appreciation and gives you a deduction for the full fair market value. If you bought stock at $10,000 and it’s now worth $50,000, donating it saves you tax on $40,000 of gains that you’d otherwise owe on a sale. The charity gets the same $50,000 either way.

For taxpayers over 70½, qualified charitable distributions (QCDs) let you send up to $105,000 per year directly from your IRA to a charity. The distribution satisfies your required minimum distribution but doesn’t count as taxable income. It’s one of the cleanest tax moves available to retirees, and it works even if you take the standard deduction.

Business Expense Decisions That Compound

Section 179 expensing and bonus depreciation let you deduct the full cost of qualifying business equipment and property in the year you buy it, rather than depreciating it over time. For 2025, Section 179 allows up to $1,250,000 in immediate deductions. Bonus depreciation under §168(k) is back to 100% for qualified property placed in service after January 19, 2025 — OBBBA §70401 reversed the scheduled phase-down (60%, 40%, 20%, 0%) and made 100% bonus depreciation permanent.

Timing large purchases around year-end can shift significant deductions into the current year. A business that buys a $100,000 piece of equipment in December gets the same first-year deduction as one that bought it in January — assuming the asset is placed in service before year-end.

The Common Thread

Every strategy on this list comes from the same playbook: understand the rules, plan ahead, and make decisions before December 31 rather than after. The biggest tax savings don’t come from clever tricks at filing time. They come from choices made throughout the year — what to contribute, how to structure, when to sell, and where to give.

A $500 tax prep fee catches what happened. A tax planning conversation changes what happens next.

Sources & References

• IRS Newsroom — 401(k) Limit Increases to $23,500 for 2025
• IRS — Tax Inflation Adjustments for Tax Year 2025
• IRS — Simplified Employee Pension Plan (SEP)
• IRS Form 2553 — Election by a Small Business Corporation
• 26 U.S.C. § 1091 — Wash Sale Loss Disallowance
• 26 U.S.C. § 1211 — Limitation on Capital Losses
• 26 U.S.C. § 179 — Election to Expense Certain Depreciable Assets
• 26 U.S.C. § 168(k) — Bonus Depreciation (as amended by OBBBA §70401)
• 26 U.S.C. § 1014 — Basis of Property Acquired from a Decedent
• 26 U.S.C. § 3121 — FICA Employment Tax Definitions
• IRS Tax Topic 409 — Capital Gains and Losses
• IRS Publication 544 — Sales and Other Dispositions of Assets (1031 Exchanges)