Tax Deductions Most People Miss — And How to Make Sure You're Not Leaving Money on the Table

Every year, Americans collectively leave billions of dollars on the table at tax time. Not because they're doing anything wrong — but because they simply don't know what they're entitled to claim. The tax code is sprawling, counterintuitive, and deliberately difficult to navigate without help. The IRS doesn't send you a reminder when you miss a deduction.

I've spent years covering consumer financial issues, and tax season is when I hear the most stories of preventable overpayments. This isn't about exotic loopholes for the wealthy — most of what I'm going to walk you through are deductions available to ordinary people that regularly go unclaimed. Let's fix that.

First: Standard Deduction vs. Itemizing

Before we get into specific deductions, a quick note on the standard deduction. For 2024, the standard deduction is $14,600 for single filers and $29,200 for married filing jointly. Most people take it because it's simpler and — post the 2017 Tax Cuts and Jobs Act — it's higher than what most people could claim by itemizing.

However, some deductions — including several I'll cover below — are available regardless of whether you itemize. These are called "above-the-line" deductions or adjustments to income, and they reduce your adjusted gross income (AGI) directly. Everyone should know about these, whether they itemize or not.

Deductions Available to Everyone (Above-the-Line)

Student Loan Interest

If you paid interest on student loans — federal or private — you can deduct up to $2,500 per year, even if you don't itemize. The deduction phases out at higher income levels (beginning at $75,000 for single filers in 2024), but many borrowers qualify and simply don't claim it. Check your loan servicer's January tax statement — they're required to send you the interest paid figure.

IRA Contributions

Contributions to a traditional IRA are potentially deductible, up to $7,000 per year ($8,000 if you're 50 or older). Whether you can deduct the full amount depends on your income and whether you or your spouse have access to a workplace retirement plan. Even partial deductibility is worth calculating. And here's a timing bonus: you have until the tax filing deadline — typically April 15 — to make a prior-year IRA contribution.

Health Savings Account (HSA) Contributions

If you have a high-deductible health plan, contributions you make directly to your HSA are fully deductible, regardless of whether you itemize. The 2024 limits are $4,150 for individuals and $8,300 for families. This is one of the most tax-advantaged accounts available to non-wealthy Americans — contributions go in pre-tax, grow tax-free, and come out tax-free for qualified medical expenses. Many people contribute through payroll and don't realize they can also make additional direct contributions.

Self-Employed Health Insurance Premiums

If you're self-employed and pay your own health insurance premiums, you can deduct 100% of those premiums from your income — for yourself, your spouse, and your dependents. This is a significant deduction that many freelancers and small business owners miss simply because they don't know it exists. It applies as long as you're not eligible for coverage through an employer or a spouse's employer.

Deductions for Itemizers Worth Knowing

If your itemizable deductions exceed the standard deduction, these are frequently overlooked:

Unreimbursed Medical Expenses

Medical and dental expenses that exceed 7.5% of your adjusted gross income can be deducted if you itemize. This threshold sounds high, but in a year with significant medical costs — a surgery, cancer treatment, dental work, mental health care — it can be very reachable. Deductible expenses include insurance premiums you pay out of pocket, prescription costs, medical equipment, and even mileage to and from medical appointments.

Charitable Contributions — Including Non-Cash Donations

Most people know cash donations to qualified charities are deductible if you itemize. What fewer people know is that non-cash donations — clothing, household goods, furniture, and vehicle donations — are also deductible at fair market value. Goodwill and similar organizations will often provide a valuation guide. You can also deduct mileage driven for charitable purposes and out-of-pocket expenses when volunteering.

State and Local Taxes (SALT)

You can deduct up to $10,000 in state and local taxes — including state income taxes or sales taxes (whichever is higher), plus property taxes. The $10,000 cap (currently set to expire after 2025, though Congress may extend or change it) has limited this deduction's value for higher earners in high-tax states, but for many middle-income itemizers it remains one of the largest available deductions.

Credits That Get Confused with Deductions

A quick but important distinction: deductions reduce your taxable income, while tax credits reduce your actual tax bill dollar for dollar. Credits are generally more valuable. Two that are commonly overlooked and often confused with deductions:

The Earned Income Tax Credit (EITC)

One of the most significant tax benefits available to lower and middle-income workers — and one of the most frequently unclaimed. For 2024, the maximum EITC for a family with three or more qualifying children is over $7,800. Even workers without children may qualify. The IRS estimates that roughly one in five eligible workers doesn't claim it. If your income falls in the eligible range, check your eligibility every year.

The Saver's Credit

If you contribute to a 401(k), IRA, or other retirement plan and your income falls below certain thresholds, you may qualify for the Saver's Credit — worth 10%, 20%, or 50% of your contribution, up to $2,000 for individuals. This is a direct credit against your tax bill, not just a deduction. It's designed specifically to reward lower-income workers for saving for retirement, and a substantial number of eligible people simply don't know it exists.

Practical Steps to Stop Leaving Money Behind

Keep Records Year-Round

Deductions you can't document aren't deductions you can claim. Keep receipts for charitable donations, medical expenses, and any business-related costs. A simple folder — physical or digital — is enough. The habit of capturing receipts in the moment takes seconds; reconstructing them in April takes hours.

Use Tax Software That Asks the Right Questions

Quality tax software — TurboTax, H&R Block, FreeTaxUSA — walks you through a series of questions designed to surface deductions and credits you qualify for. It's not foolproof, but it's significantly better than a blank form. If your situation is straightforward, free filing options exist through the IRS Free File program for households earning under $79,000.

The Bottom Line

The tax code isn't written to make it easy to find everything you're owed. That's exactly why knowing where to look matters. Student loan interest, HSA contributions, self-employed health premiums, charitable non-cash donations, the EITC, the Saver's Credit — these aren't exotic strategies. They're standard provisions that millions of qualifying Americans walk past every year.

This year, don't walk past them.