You can offset federal income tax with deductions and credits by stacking three tools the tax code makes available: deductions that reduce the income the IRS can tax, credits that cut your tax bill dollar-for-dollar, and capital losses that erase investment gains or chip away at ordinary income. For tax year 2026, the standard deduction alone shields $16,100 for a single filer and $32,200 for a married couple filing jointly before any other move you make. The bigger savings show up when you layer these tools so each one compounds the benefit of the others.
Start With the Standard Deduction
The standard deduction is the default. It reduces your taxable income by a flat amount tied to your filing status, and you don’t have to track a single receipt to claim it. For 2026:
- Single or married filing separately: $16,100
- Married filing jointly: $32,200
- Head of household: $24,150
These figures are adjusted for inflation each year.1Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill If your itemizable expenses don’t beat the standard amount, there’s nothing to gain by itemizing, which is why most filers stick with the default.
Taxpayers age 65 or older get an additional standard deduction under existing law. From 2025 through 2028, an enhanced deduction adds another $6,000 per qualifying person, or $12,000 when both spouses are 65 or older. It phases out once modified adjusted gross income passes $75,000 single or $150,000 joint.2Internal Revenue Service. Check Your Eligibility for the New Enhanced Deduction for Seniors
When Itemizing Beats the Standard Deduction
Itemizing swaps the flat amount for a list of specific expenses reported on Schedule A. It only pays off when those expenses add up to more than the standard deduction, and in practice that mostly means homeowners with sizable mortgages and taxpayers in high-tax states.
State and Local Taxes
SALT covers property taxes plus either state income taxes or state sales taxes, whichever is higher. You cannot deduct both income and sales taxes. For 2026, the combined SALT deduction caps at $40,400 for most filers, or $20,200 for married filing separately, and the cap climbs by roughly one percent per year through 2029.3Office of the Law Revision Counsel. 26 U.S. Code 164 – Taxes That’s well above the old $10,000 cap, which pulls more households across the itemizing threshold.
Mortgage Interest
Interest on up to $750,000 of mortgage debt used to buy, build, or substantially improve a primary or secondary residence is deductible. Married filing separately, the limit is $375,000.4Internal Revenue Service. Publication 936 (2025), Home Mortgage Interest Deduction In the early years of a mortgage, when most of each payment is interest, this one line item can push your itemized total past the standard deduction on its own.
Medical and Dental Expenses
Unreimbursed medical costs are deductible, but only the portion above 7.5 percent of your adjusted gross income. On an $80,000 AGI, only medical expenses over $6,000 count.5Office of the Law Revision Counsel. 26 USC 213 – Medical, Dental, Etc., Expenses Qualifying items include doctor visits, surgeries, prescriptions, certain long-term care costs, and health insurance premiums paid with after-tax dollars. The floor means this deduction really only helps in years with unusually heavy medical bills.
Charitable Contributions
Gifts to qualified nonprofits count toward your itemized total. Cash contributions to public charities are generally deductible up to 50 percent of AGI, with lower limits of 20 or 30 percent for certain property or organizations.6Internal Revenue Service. Charitable Contribution Deductions Any single donation of $250 or more needs a written acknowledgment from the organization. Weak documentation can cost you the entire deduction if the IRS looks.
Adjustments That Lower Your AGI Before You Choose
Above-the-line adjustments come off your income before you pick between the standard deduction and itemizing, so every taxpayer can use them. They carry a second benefit: because many credits and deductions phase out at higher AGI, cutting your AGI here can unlock or increase other tax breaks further down the return. These live on Schedule 1 and feed directly into the Form 1040 AGI line.7Internal Revenue Service. Schedule 1 (Form 1040) 2025 – Additional Income and Adjustments to Income
Health Savings Account Contributions
If you’re enrolled in a qualifying high-deductible health plan, every dollar you put into a Health Savings Account comes off your gross income. For 2026, the limits are $4,400 for self-only coverage and $8,750 for family coverage. Anyone 55 or older who isn’t yet on Medicare can add $1,000 as a catch-up. The account grows tax-free, and qualified medical withdrawals are never taxed.
Student Loan Interest
Up to $2,500 in interest paid on qualified student loans is deductible even if you take the standard deduction. For 2026, the deduction phases out between $85,000 and $100,000 in modified AGI for single filers, and between $175,000 and $205,000 for joint filers. Above the top of those ranges, the deduction is gone.
Half of Self-Employment Tax
Self-employed taxpayers pay both halves of Social Security and Medicare taxes. The code lets you deduct the employer-equivalent share as an above-the-line adjustment, calculated on Schedule SE and reported on Schedule 1.8Internal Revenue Service. Topic No. 554, Self-Employment Tax For anyone paying several thousand dollars in SE tax, this meaningfully lowers AGI and the income tax figured on it.
Retirement Contributions That Cut This Year’s Tax
Money you put into pre-tax retirement accounts is one of the most efficient ways to reduce this year’s income tax while building long-term savings.
401(k) and Similar Employer Plans
Pre-tax contributions to a traditional 401(k), 403(b), or similar plan come out of your wages before they hit your W-2. For 2026, you can defer up to $24,500. If you’re 50 or older, an additional $8,000 catch-up brings the total to $32,500.9Internal Revenue Service. Retirement Topics – 401(k) and Profit-Sharing Plan Contribution Limits Because these reductions apply to your W-2 income directly, they usually cut state income tax as well.
Traditional IRA
Traditional IRA contributions may also be deductible above the line, though the rules tighten when you or your spouse is covered by a workplace plan. For 2026, the contribution limit is $7,500, plus a $1,100 catch-up at 50 or older for a total of $8,600.10Internal Revenue Service. Retirement Topics – IRA Contribution Limits With a workplace plan in the picture, deductibility phases out at certain income levels. With no workplace plan on either side of a marriage, the full contribution is deductible regardless of income.
Credits That Reduce the Tax Itself
Credits beat deductions dollar for dollar. A $1,000 deduction saves you $220 in the 22 percent bracket; a $1,000 credit saves the full $1,000. Non-refundable credits can bring your tax down to zero but no further. Refundable credits can generate a payment even when you owe nothing.
Child Tax Credit
The Child Tax Credit is worth up to $2,200 for each qualifying child under 17 with a Social Security number. You get the full credit at or below $200,000 in income for single filers or $400,000 for joint filers; above those thresholds it shrinks by five percent of the excess. The credit is non-refundable, but up to $1,700 per child can come back as a refund through the Additional Child Tax Credit.11Internal Revenue Service. Child Tax Credit The amount is now indexed for inflation.
Earned Income Tax Credit
The EITC is fully refundable and aimed at lower-to-moderate-income workers. It scales up with earned income to a maximum, then phases out as income rises. For 2025 (the latest published figures), the maximums are:
- No qualifying children: $649
- One child: $4,328
- Two children: $7,152
- Three or more children: $8,046
Amounts adjust for inflation each year, so 2026 figures will run slightly higher.12Internal Revenue Service. Earned Income and Earned Income Tax Credit (EITC) Tables AGI ceilings also apply. Many eligible taxpayers never claim it because they don’t realize they qualify.
American Opportunity Tax Credit
The AOTC covers up to $2,500 per year in qualified tuition and related expenses for each eligible student during the first four years of post-secondary education. Forty percent (up to $1,000) is refundable.13Internal Revenue Service. American Opportunity Tax Credit The full credit is available at $80,000 or less in modified AGI for single filers and $160,000 or less for joint filers. It phases out entirely above $90,000 and $180,000 respectively. The student must be enrolled at least half-time and must not have finished four years of higher education.
Extra Deductions If You’re Self-Employed
Self-employment opens deductions that W-2 employees cannot claim. Recordkeeping matters here.
Qualified Business Income Deduction
Owners of sole proprietorships, partnerships, and S corporations may deduct up to 20 percent of qualified business income under Section 199A, which the One Big Beautiful Bill Act made permanent. It sits on your personal return and doesn’t require itemizing.14Internal Revenue Service. Qualified Business Income Deduction Income from a C corporation or W-2 job doesn’t qualify. At higher incomes, the deduction may be limited by W-2 wages paid or the value of business property. At lower incomes, the math is straightforward: subtract 20 percent of business profit before figuring tax on it.
Home Office Deduction
Regular and exclusive business use of part of your home opens a deduction for a portion of housing costs. The simplified method is $5 per square foot up to 300 square feet, capped at $1,500.15Internal Revenue Service. Simplified Option for Home Office Deduction The regular method deducts the actual proportional share of rent or mortgage interest, utilities, insurance, and repairs, often much more for a larger space. Remote employees working from home for an employer cannot claim it; this one belongs to the self-employed and certain independent contractors.
Using Capital Losses to Offset Gains and Income
When you sell an investment for less than you paid, the loss can wipe out taxable gains and even reduce ordinary income.
Netting Gains and Losses
Losses first cancel gains from the same tax year. Short-term losses match against short-term gains, long-term against long-term, and the leftovers combine. If you finish with a net loss, up to $3,000 of it comes off ordinary income like wages or business earnings. Married filing separately, the cap is $1,500 each.16Office of the Law Revision Counsel. 26 USC 1211 – Limitation on Capital Losses
Anything above $3,000 carries forward indefinitely. A rough year in the markets can shave taxes for a decade. Every transaction needs purchase dates, sale dates, and cost basis, reported on Form 8949.17Internal Revenue Service. Instructions for Form 8949 (2025)
The Wash Sale Rule
Selling a stock at a loss and buying it right back doesn’t work. If you acquire substantially identical stock or securities within 30 days before or after the sale, the loss is disallowed for that tax year.18Office of the Law Revision Counsel. 26 U.S. Code 1091 – Loss From Wash Sales of Stock or Securities The disallowed loss adds to the cost basis of the replacement shares, so you recover it eventually, but the timing you wanted is gone. Waiting at least 31 days before repurchasing, or switching to a similar but not substantially identical position in the interim, keeps the loss usable.
What Happens If You Overclaim
Aggressive offsets that tip into overstatement come with real costs. The IRS applies a 20 percent accuracy-related penalty to any underpayment stemming from negligence or a substantial understatement of income tax.19Office of the Law Revision Counsel. 26 U.S. Code 6662 – Imposition of Accuracy-Related Penalty on Underpayments A separate 20 percent penalty hits an excessive refund or credit claim unless you can show reasonable cause.20Office of the Law Revision Counsel. 26 U.S. Code 6676 – Erroneous Claim for Refund or Credit For gross valuation misstatements or undisclosed foreign financial assets, the rate rises to 40 percent. Documentation is the defense: receipts, acknowledgment letters, brokerage statements, and, for anything in a gray area, a written explanation of the position you took and the records behind it.