Tax Planning: How to Legally Pay Less Taxes in the US

Did you know that the average American taxpayer could be paying up to 30% more in taxes than they actually need to? According to a 2026 study by the Tax Foundation, only 28% of US taxpayers engage in any form of personal tax planning, missing out on legal opportunities that could save them $2,000 to $10,000 per year depending on income level.

Personal tax planning has nothing to do with tax evasion or shady practices. It’s simply knowing the rules of the game and using the benefits that tax law provides. The IRS offers dozens of deductions, credits, and favorable tax treatments, but most people don’t know about them or fail to take advantage.

In this complete guide, you’ll learn practical and 100% legal strategies to reduce your tax burden: how to maximize 401(k) and IRA contributions to reduce taxable income, tax deductions people often forget, when it makes sense to itemize instead of taking the standard deduction, optimal timing for selling investments, and how to prepare now to pay less tax next year. Keep reading to discover how much money you could save.

What is Personal Tax Planning

Tax planning is the set of legal actions you take throughout the year to minimize the amount of taxes you need to pay, without breaking any laws. It’s not tax evasion, it’s not fraud — it’s simply using the benefits the government offers intelligently.

Why do so few people do it?

Most people treat taxes as something that happens once a year in April. You gather documents, rush through filing, and hope you don’t owe money. But tax planning works differently: it starts in January and continues all year long.

The problem is that the US tax system is complex. There are hundreds of rules, exceptions, limits, and deadlines. But don’t worry: you don’t need to become a tax law expert. You just need to know the main strategies that really make a difference to your wallet.

Tax planning vs. tax evasion

It’s crucial to understand the difference:

Golden rule: If you need to lie, omit, or falsify anything, it’s not tax planning — it’s a crime. Everything we’ll cover here is 100% legal and often encouraged by the IRS itself.

Strategy 1: Maximize Retirement Contributions for Tax Deductions

Retirement accounts like 401(k)s and IRAs are among the most powerful tax planning tools, yet they’re underutilized. Only 41% of eligible Americans max out their retirement contributions, according to Vanguard’s 2026 report.

How 401(k) deductions work

When you contribute to a traditional 401(k), that money is deducted from your taxable income. This means it comes off your income before taxes are calculated, reducing the amount you owe or increasing your refund.

Practical example:

• Annual gross income: $80,000
• 401(k) contribution: $23,000 (current limit for under 50)
• Taxable income without 401(k): $80,000 → Tax: ~$11,500
• Taxable income with 401(k): $57,000 → Tax: ~$6,800
• Immediate savings: $4,700

Contribution limits

Important: You can contribute to both a 401(k) and an IRA in the same year, potentially sheltering $30,000+ from taxes if you’re under 50.

Traditional vs. Roth: which to choose?

Rule of thumb: If you’re in the 24% tax bracket or higher, traditional accounts usually make more sense. If you’re in the 12% bracket or lower, Roth may be better.

HSA: the triple tax advantage

If you have a high-deductible health plan, a Health Savings Account (HSA) offers the best tax deal in the tax code:

1. Tax deduction on contributions (like traditional IRA)
2. Tax-free growth (like Roth IRA)
3. Tax-free withdrawals for qualified medical expenses

Current limits: $4,150 individual, $8,300 family, plus $1,000 catch-up if 55+

Strategy: Max out your HSA, invest the money (don’t just hold cash), and save receipts for medical expenses. You can reimburse yourself decades later tax-free, essentially creating a tax-free retirement account.

Self-employed options

If you’re self-employed, you have access to even more powerful retirement vehicles:

• SEP IRA: Contribute up to 25% of net self-employment income, max $69,000
• Solo 401(k): Contribute as employee ($23,000) + employer (25%), max $69,000
• Defined Benefit Plan: Can shelter $200,000+ annually for high earners (requires actuary)

These contributions are business deductions, reducing both income tax and self-employment tax.

Strategy 2: Deductions People Often Forget

When you itemize deductions, you can deduct various expenses, reducing your taxable income. The problem is many people forget to include important expenses or simply don’t know they’re deductible.

Medical and dental expenses (AGI threshold)

You can deduct unreimbursed medical and dental expenses that exceed 7.5% of your adjusted gross income (AGI).

What you can deduct:

• Doctor, dentist, and specialist visits
• Lab fees and medical tests
• Hospital costs and surgeries
• Prescription medications
• Health insurance premiums (if self-employed or not subsidized)
• Medical equipment (crutches, wheelchairs, etc.)
• Mileage to medical appointments (21 cents/mile)
• Long-term care insurance premiums (age-based limits)

Example: AGI of $70,000 means you can deduct expenses over $5,250. If you had $12,000 in medical costs, you can deduct $6,750. At the 24% tax bracket, that’s $1,620 in tax savings.

State and local taxes (SALT)

You can deduct state and local taxes, but there’s a $10,000 cap ($5,000 if married filing separately):

• State income tax OR state sales tax (choose whichever is higher)
• Property tax on real estate
• Personal property tax on vehicles (if based on value)

Strategy: If you have a large state tax bill or property tax bill due in January, consider paying it in December to deduct it this year (if it helps you itemize).

Mortgage interest

You can deduct interest on mortgage debt up to $750,000 ($375,000 married filing separately):

• Primary residence mortgage
• Second home mortgage
• Home equity loan (if used to improve the home)

What’s not deductible: Interest on home equity loans used for purposes other than home improvement (cars, debt consolidation, etc.)

Charitable contributions

Donations to qualified charities are deductible with these limits:

• Cash donations: Up to 60% of AGI
• Property donations: Up to 30% of AGI for appreciated assets

What you can deduct:

• Cash donations (need receipt for $250+)
• Check or credit card donations (must have documentation)
• Property donations (fair market value, need appraisal for $5,000+)
• Mileage for charity work (14 cents/mile)
• Out-of-pocket expenses for volunteer work

What you can’t deduct:

• Your time or services (even if valuable)
• Donations to individuals
• Political contributions
• Raffle tickets or auction items (only excess over fair market value)

Strategy: Donate appreciated stock instead of cash. You deduct the full market value and never pay capital gains tax on the appreciation.

Educator expenses

If you’re a K-12 teacher, you can deduct up to $300 ($600 married both teachers) for unreimbursed classroom expenses — and you don’t even need to itemize. This is an “above-the-line” deduction.

Student loan interest

You can deduct up to $2,500 of student loan interest paid, even without itemizing. Income limits apply: Phaseout starts at $75,000 single ($155,000 married) and ends at $90,000 single ($185,000 married).

Home office deduction

If you’re self-employed and use part of your home exclusively for business, you can deduct a portion of home expenses:

Simplified method: $5 per square foot, up to 300 sq ft = max $1,500

Regular method: Calculate actual percentage of home used for business and deduct that portion of:

• Rent or mortgage interest
• Utilities
• Insurance
• Repairs and maintenance
• Depreciation

Important: This is only for self-employed individuals. W-2 employees can no longer deduct home office expenses (eliminated by 2017 tax law).

Strategy 3: Standard Deduction vs. Itemizing

Every year you must choose between taking the standard deduction or itemizing your deductions. This choice can make a difference of thousands of dollars.

Standard deduction amounts

Additional amounts: Add $1,500 if 65+ or blind ($1,950 if single/HOH)

When to itemize

Itemizing makes sense when your total itemized deductions exceed the standard deduction for your filing status.

You should itemize if you have:

• Large medical expenses (over 7.5% of AGI)
• Significant mortgage interest ($10,000+)
• High property taxes (hitting the $10,000 SALT cap)
• Large charitable donations
• Major casualty losses (in federally declared disaster areas)

Example: Married couple with $18,000 mortgage interest + $10,000 SALT + $8,000 charity = $36,000 itemized deductions. Since this exceeds the $29,200 standard deduction, they save $1,632 by itemizing (at 24% bracket).

When to take standard deduction

The standard deduction is better when:

• You don’t own a home
• You have low medical expenses
• Your charitable giving is minimal
• Your itemized deductions total less than the standard deduction

Post-2017 changes: The Tax Cuts and Jobs Act nearly doubled the standard deduction, making itemizing less common. About 90% of taxpayers now take the standard deduction, compared to 70% before 2018.

Bunching strategy

If your itemized deductions are close to the standard deduction, consider bunching — concentrating deductible expenses every other year:

Example without bunching:

• Year 1 itemized deductions: $26,000 → Take standard $29,200
• Year 2 itemized deductions: $26,000 → Take standard $29,200
• Total deductions over 2 years: $58,400

Example with bunching:

• Year 1 itemized deductions: $52,000 (prepay next year’s charity and property tax)
• Year 2 itemized deductions: $0 → Take standard $29,200
• Total deductions over 2 years: $81,200
• Extra savings: $5,472 (at 24% bracket)

This works well with charitable donations (make 2 years of donations in year 1) and property taxes (pay January bill in December if it helps you itemize).

Strategy 4: Timing of Investment Sales

When you sell investments can have enormous impact on taxes. With planning, you can legally reduce capital gains taxes.

Short-term vs. long-term capital gains

The holding period makes a huge difference:

Long-term capital gains rates:

Strategy: If you’re close to the 1-year mark, waiting just a few more days can cut your tax rate from 37% to 15% — a massive savings.

Tax-loss harvesting

One of the most powerful strategies is using losses to offset gains. When you sell an investment at a loss, you can use that loss to offset capital gains.

How it works:

• Capital losses first offset capital gains of the same type (short-term losses offset short-term gains)
• Excess losses can offset the other type of gains
• If you still have losses left, you can deduct up to $3,000 against ordinary income ($1,500 if married filing separately)
• Remaining losses carry forward indefinitely to future years

Example:

• You have $50,000 in long-term capital gains (would owe $7,500 in taxes)
• You sell losing positions for $30,000 loss
• Net gain: $20,000 (owe $3,000 instead of $7,500)
• Tax savings: $4,500

Wash sale rule

Be careful: The wash sale rule prevents you from claiming a loss if you buy the “substantially identical” security within 30 days before or after the sale.

Example of wash sale:

• Dec 10: Sell SPY (S&P 500 ETF) at a loss
• Dec 20: Buy SPY back
• Result: Loss is disallowed

How to avoid:

• Wait 31 days before repurchasing
• Buy a similar but not identical fund (sell SPY, buy VOO or IVV)
• Use the loss to offset gains instead of trying to claim it against income

0% capital gains bracket

If your income is low enough, you can pay 0% tax on long-term capital gains. This is powerful for retirees or anyone with a low-income year.

Thresholds for 0% rate:

• Single: Up to $47,025 total income
• Married: Up to $94,050 total income

Strategy: If you’re retired or taking a sabbatical, sell appreciated assets during low-income years to pay zero tax on gains.

Qualified Small Business Stock (QSBS)

If you invested in a qualified small business (under $50M in assets), you may be able to exclude up to $10 million in gains or 10x your investment (whichever is greater) if you held it for 5+ years.

This is one of the most generous tax breaks in the code and often overlooked by startup employees and angel investors.

NUA for employer stock

If you have highly appreciated company stock in your 401(k), the Net Unrealized Appreciation (NUA) strategy can save massive taxes:

• Take a lump-sum distribution from 401(k)
• Pay ordinary income tax only on the original cost basis
• Pay long-term capital gains tax on appreciation when you eventually sell
• Can save 15-20% in taxes vs. rolling everything to IRA

This is complex and requires careful planning, but can save six figures for executives with large employer stock holdings.

Strategy 5: Charitable Giving Strategies

Strategic charitable giving can reduce taxes while supporting causes you care about. Here are advanced strategies beyond basic cash donations.

Donor-Advised Funds (DAF)

A DAF allows you to:

1. Donate cash or appreciated assets and get an immediate tax deduction
2. Invest the funds for potential growth (tax-free)
3. Distribute to charities over time

Benefits:

• Bunch multiple years of donations in one year (itemize this year, take standard next year)
• Donate appreciated stock (avoid capital gains, deduct full value)
• Simplify record-keeping (one tax form vs. dozens from different charities)
• Take time deciding which charities to support

Example: You normally give $10,000/year to charity. Instead, contribute $50,000 to a DAF in one year, deduct it all that year (helps you itemize), then distribute $10,000/year for the next 5 years.

Donating appreciated assets

Never donate cash if you have appreciated stock or other assets. Here’s why:

Donating cash:

• Donate $10,000 cash
• Deduct $10,000
• Net cost: $10,000 - $2,400 tax savings = $7,600

Donating appreciated stock:

• Stock cost: $5,000, current value: $10,000
• Donate stock worth $10,000
• Deduct $10,000 (full market value)
• Avoid $750 capital gains tax
• Net cost: $10,000 - $2,400 deduction - $750 avoided tax = $6,850

You save an extra $750 by donating stock instead of cash.

Qualified Charitable Distributions (QCD)

If you’re 70½ or older, you can donate up to $105,000 (current limit) directly from your IRA to charity:

• Counts toward Required Minimum Distribution (RMD)
• Not included in your income (better than taking RMD and donating)
• Can donate even if you take standard deduction

Example: Age 75 with $50,000 RMD. Without QCD, you pay taxes on $50,000. With $20,000 QCD, you only pay taxes on $30,000 — saving $4,800 (at 24% rate).

Charitable Remainder Trust (CRT)

For large estates, a CRT allows you to:

• Donate highly appreciated assets
• Avoid capital gains tax
• Receive income for life
• Get partial tax deduction
• Remainder goes to charity at death

This is complex and expensive to set up, but can save hundreds of thousands in taxes for high-net-worth individuals.

Strategy 6: Planning for Next Year (Start Now)

The biggest mistake people make is thinking about taxes only in April. Effective tax planning happens throughout the year before.

Year-round tax planning calendar

January-March:

• Review last year’s return to identify missed opportunities
• Set up automatic retirement contributions for the year
• Establish a system to track deductible expenses (health, charity, business)
• Make Q1 estimated tax payment if self-employed (April 15)

April-June:

• Max out last year’s IRA contributions if you haven’t (deadline April 15)
• Review your W-4 withholding if you had a big refund or owed a lot
• Make Q2 estimated payment if self-employed (June 15)
• Consider mid-year tax projection to avoid surprises

July-September:

• Make Q3 estimated payment if self-employed (Sept 15)
• Review year-to-date income and withholding
• Adjust retirement contributions if needed
• Start thinking about year-end tax moves

October-December:

• December is crucial: Last chance for most tax planning
• Max out 401(k) and HSA contributions
• Harvest tax losses to offset gains
• Make charitable donations before Dec 31
• Prepay January property tax and mortgage payment if it helps you itemize
• Convert traditional IRA to Roth if you had a low-income year
• Make Q4 estimated payment (Jan 15 of next year)

December year-end strategies

Actions you must take by December 31 to affect this year’s taxes:

• Max out retirement accounts (401k, IRA, HSA)
• Realize capital losses (but watch wash sale rule)
• Donate to charity (must clear by Dec 31, or use credit card)
• Pay deductible expenses (medical, property tax, state income tax)
• Convert traditional IRA to Roth (if strategically advantageous)

What you can do after year-end:

• IRA contributions (until April 15 of next year)
• HSA contributions (until April 15 of next year)
• Nothing else — most tax planning must be done by Dec 31

Roth conversion planning

If you expect to be in a higher tax bracket in retirement, consider converting traditional IRA money to Roth while you’re in a lower bracket:

• Pay taxes now at lower rate
• Money grows tax-free forever
• No RMDs on Roth IRAs
• Tax-free inheritance for heirs

Strategy: Convert just enough each year to “fill up” your current tax bracket without jumping to the next one.

Tax projection

Don’t wait until April to know if you’ll owe taxes. Do a projection in November:

1. Estimate this year’s total income
2. Calculate deductions and credits
3. Compare to taxes withheld/estimated payments
4. Make adjustments if needed

This avoids underpayment penalties and gives you time to make final tax-saving moves.

How Monely Can Help with Tax Planning

Financial organization is essential for good tax planning. Knowing exactly how much you earn, how much you spend, and where every dollar goes is the first step to identifying tax-saving opportunities. This is where Monely becomes your ally.

Track deductible expenses: Record all spending on health, charity, business expenses, and other deductible items throughout the year. At year-end, you have a complete report of everything you can deduct without scrambling for receipts last minute.

Custom tags: Create tags like “Tax Deductible,” “Medical,” “Charity,” “Business Expense” to categorize spending that will impact your tax return. When it’s time to file, you filter by tag and have everything organized.

Investment tracking and capital gains: Log purchases and sales of assets, track results of each transaction, and know if you had gains or losses. This makes calculating capital gains easier and helps identify loss harvesting opportunities.

Retirement contribution tracking: Set up recurring monthly retirement contributions in Monely to track if you’re hitting your 401(k) or IRA goals throughout the year. You can create a specific financial goal for retirement savings and monitor progress.

Annual comprehensive reports: Generate complete reports of income, expenses, investments, and net worth. These reports serve as the foundation for your tax return and help identify inconsistencies or deduction opportunities.

Important date reminders: Set up reminders for crucial tax planning deadlines: year-end for retirement contributions, quarterly estimated tax payments, tax filing deadline, and payment due dates.

Monely doesn’t replace a CPA, but provides all the organization and tracking you need to make smarter decisions about your taxes. With accurate, up-to-date data, tax planning becomes less overwhelming and more of a real money-saving tool.

Conclusion

Personal tax planning isn’t just for the wealthy or those with accountants. It’s simply knowing the rules and using the benefits the law provides. Maxing out retirement accounts, taking advantage of all available deductions, choosing the right filing approach, strategically timing investment sales, and giving to charity smartly are 100% legal strategies that can save $2,000 to $15,000+ per year depending on your income.

The secret is starting now, not next April. Organize your records throughout the year, set up automatic retirement contributions, track deductible expenses, and plan investment sales strategically. These simple actions can represent savings equal to a month’s salary or more by year-end.

Remember: paying less tax legally isn’t just your right — it’s financial intelligence. The government offers these benefits to incentive healthy financial behaviors like saving for retirement, investing in health and education, and supporting charitable causes. Take advantage of these opportunities.

If you want to keep your finances organized all year and simplify next year’s tax planning, check out Monely — the personal finance app that helps you track spending, categorize deductible expenses, and monitor investments simply and efficiently.