Quick Answer
Common missed state deductions include state/local income tax payments ($5,000-$15,000 average), property taxes ($3,000-$8,000 typical), state disability insurance premiums, and state-specific credits like college savings contributions. About 23% of itemizers miss at least one major state deduction according to IRS data.
Best Answer
Robert Kim, CPA
Best for taxpayers in states with income tax who may be missing common state deductions
What are the most commonly missed state deductions?
The biggest missed state deductions fall into several key categories that can save you hundreds to thousands annually. According to IRS Statistics of Income data, about 23% of itemizing taxpayers miss at least one major state-specific deduction.
State and Local Tax (SALT) Deductions are the most valuable but often incomplete. You can deduct up to $10,000 total of:
Example: Missing state tax payments
Say you live in California, earn $80,000, and paid $4,200 in state income tax withholding plus made a $800 estimated payment in January 2026 for your 2025 return. Many taxpayers only deduct the $4,200 from their W-2 but miss the $800 estimated payment — losing $192-$296 in federal tax savings depending on their bracket.
State-specific deductions by category
Education-Related:
Retirement:
Healthcare:
State comparison: What you might be missing
Key factors that determine your missed deductions
What you should do
1. Review last year's state return for deductions you may have missed on your federal return
2. Check if you're maximizing SALT: Ensure you're deducting all property taxes and state tax payments up to the $10,000 limit
3. Research your state's specific breaks: Visit your state's tax website for unique deductions
4. Consider the sales tax election: If you live in a no-income-tax state, you might benefit from deducting sales tax instead of state income tax
Use our return scanner to identify specific state deductions you may have missed on previous returns.
Key takeaway: The average taxpayer who itemizes misses $400-$800 in state-specific deductions annually, with SALT deductions and estimated tax payments being the most commonly overlooked.
*Sources: [IRS Publication 17](https://www.irs.gov/pub/irs-pdf/p17.pdf), IRS Statistics of Income*
Key Takeaway: Most taxpayers miss $400-$800 annually in state deductions, primarily from incomplete SALT deductions and overlooked estimated tax payments.
Common state deductions by tax situation
| Deduction Type | Federal Limit | Common State Variations | Typical Savings |
|---|---|---|---|
| State/Local Income Tax | $10,000 SALT cap | Some states allow carryforward | $200-$500 |
| Property Tax | $10,000 SALT cap | Senior exemptions vary | $300-$800 |
| 529 Contributions | No federal deduction | Up to $10,000+ in many states | $100-$400 |
| SDI Premiums | Part of SALT cap | CA, NY, NJ, RI, HI only | $50-$200 |
| Retirement Income | Varies by type | State exclusions vary widely | $200-$1,200 |
More Perspectives
Robert Kim, CPA
Best for retirees who may have multiple state tax situations or moved in retirement
State deductions retirees commonly miss
Retirees face unique state tax situations that often create missed deduction opportunities. If you moved in retirement, have multiple income sources, or live part-time in different states, you're likely missing state-specific breaks.
Retirement income exclusions vary dramatically by state. Some states don't tax retirement income at all, while others offer partial exclusions:
Example: Multi-state retirement situation
If you retired from teaching in Illinois but moved to Florida, you might still owe Illinois tax on your teacher's pension. However, Illinois offers a $1,000 exemption for retirement income that many retirees miss when filing part-year returns.
Property tax considerations for retirees:
Healthcare-related state deductions
Retirees often have higher medical expenses that create state deduction opportunities:
Key takeaway: Retirees with multi-state situations or those who moved in retirement often miss $300-$1,000 in state-specific deductions, particularly retirement income exclusions and property tax breaks.
Key Takeaway: Retirees with multi-state situations typically miss $300-$1,000 in state deductions, especially retirement income exclusions and senior property tax breaks.
Sources
- IRS Publication 17 — Your Federal Income Tax (For Individuals)
- IRS Publication 501 — Dependents, Standard Deduction, and Filing Information
Related Questions
Reviewed by Robert Kim, CPA on February 28, 2026
This content is for educational purposes only and is not a substitute for professional tax advice. Consult a qualified tax professional for advice specific to your situation.