Top 10 tax deductions and credits people miss, ranked by average value

Every year, taxpayers leave billions on the table — the IRS itself estimates that roughly one in five eligible workers fails to claim the Earned Income Tax Credit alone. The causes are mundane: people don't know a break exists, assume they don't qualify, or their software never asked the right question. Here are the ten most valuable commonly-missed deductions and credits, ranked by typical dollar value to the people who qualify. One distinction before the list: a credit cuts your tax bill dollar-for-dollar; a deduction only cuts taxable income, so a $1,000 credit beats a $1,000 deduction every time.

1. The EITC — the biggest miss in the entire tax code

The Earned Income Tax Credit pays working households up to $7,800+ (with three children, at 2025-era levels), it's fully refundable — meaning you get it even if you owe zero tax — and roughly 20% of eligible workers never claim it. The classic misses: people whose income dropped mid-career and don't realize they now qualify, workers without children (who can claim a smaller but real credit), and anyone below the filing threshold who skips filing entirely and forfeits the refund. If your household income is under roughly $65,000, check eligibility every single year — and note you can retroactively claim it by amending up to three years back.

2. The Saver's Credit — paid to do what you were doing anyway

Contribute to a 401(k) or IRA while earning a low-to-moderate income, and the Saver's Credit hands back 10–50% of up to $2,000 of contributions ($4,000 married). It's missed constantly by early-career workers, part-timers, and anyone in a low-income year — grad students with a job, semi-retirees, people between careers. A married couple earning $46,000 who put $4,000 into IRAs can receive a $2,000 credit: an instant 50% return before the investments earn a cent.

3–4. Education and dependent care credits

The American Opportunity Credit pays up to $2,500 per student for each of the first four undergraduate years — and up to $1,000 of it is refundable. It's missed when parents assume income limits disqualify them (the phase-out is generous), when a grandparent or the student could claim it and nobody coordinates, or when the 1098-T form goes unopened. The Child and Dependent Care Credit covers 20–35% of up to $3,000–$6,000 in daycare, preschool, after-school care, and — the famous miss — summer day camps, which qualify while overnight camps don't. Families who pay for camp out of habit and never file Form 2441 leave $600–$1,200 behind annually.

5–7. The above-the-line workhorses

These three don't require itemizing, which is exactly why people assume they can't claim them. HSA contributions made directly (outside payroll deduction) — common after leaving a job or when a spouse's plan qualifies — are deductible on your return, worth $300–$1,500 for typical contributions, but only if you remember Form 8889. The self-employed stack is rank six because gig workers routinely miss the trio: the home office deduction (the simplified method is $5 per square foot, up to $1,500, and audit anxiety about it is overblown for legitimate claims), the deduction for half of self-employment tax, and self-employed health insurance premiums — together often worth thousands. The traditional IRA deduction at rank seven gets missed by people who assume having a 401(k) kills it; the income phase-outs are higher than most guess, and a non-covered spouse has dramatically higher limits still.

8–10. State credits, student loans, and energy

State-level breaks are rank eight only because they vary — renters' credits, circuit-breaker property tax relief for seniors, and state-specific energy and childcare credits go unclaimed at even higher rates than federal ones, since tax software upsells state returns and users click through them fastest. The student loan interest deduction (up to $2,500 of interest, above the line) is small per person but missed by millions — especially parents who cosigned and pay directly, and borrowers who don't receive a 1098-E because interest fell under the reporting threshold. Energy credits round out the list: 30% of costs for heat pumps, insulation, windows, and panels under the residential energy credits — commonly missed by anyone whose contractor didn't mention the paperwork, and claimable only in the year of installation.

The bottom line

Ranked by value, the biggest missed tax breaks share a profile: refundable credits aimed at working households, claimed least by the people who qualify most. The fix costs one evening a year — run through this list before filing, answer your software's interview questions slowly instead of clicking past them, and check your state's credits by name. And if your income ever drops — a layoff, a career change, a new business's lean first year — that's precisely when the top of this list opens up to you, at exactly the moment you'll assume tax breaks are for other people. The code pays people who read it.