The $10K SALT Cap โ How Much Does It Cost YOU?
The 2017 tax law capped the state and local tax (SALT) deduction at $10,000. For taxpayers in high-tax states like New Jersey, New York, and California, that means thousands in lost deductionsโand hundreds or thousands in extra federal tax. This calculator shows your exact impact and models what would happen if the cap were raised or removed.
Ready to run the numbers?
Why: The SALT cap disproportionately affects taxpayers in high-tax states. Understanding your exact impact helps with tax planning and advocacy.
How: We combine your state income tax (from rate ร income), property tax, and sales tax estimate. The deduction is capped at $10K. Tax impact = (total SALT โ cap) ร your marginal federal rate.
Run the calculator when you are ready.
Your SALT & Tax Info
Tax Impact at Different Cap Levels
Your SALT Components
Tax Impact Across Income Levels
Most Affected States (Avg SALT)
For educational and informational purposes only. Verify with a qualified professional.
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CalculateQuick Answer
The SALT deduction cap limits your federal itemized deduction for state and local taxes to $10,000. If your total SALT (state income tax + property tax + sales tax) exceeds $10K, you lose the excess as a deduction. Tax impact = deduction lost ร your marginal federal rate. High-tax states like NJ, NY, and CA are hit hardest.
Key Takeaways
- โข The $10,000 SALT cap was introduced by the Tax Cuts and Jobs Act (2017) and remains in effect through 2025 and beyond unless changed by Congress.
- โข Taxpayers in NJ, NY, CA, CT, and MD pay the highest average SALT and are most affected.
- โข Your tax impact = (Total SALT โ $10,000) ร marginal federal rate when SALT exceeds the cap.
- โข Proposals to raise the cap to $20K or $80K would reduce the impact for many filers.
Did You Know?
How Does the SALT Cap Work?
Total SALT
Add state income tax (or sales tax), local property tax, and any other qualifying state/local taxes. You can only deduct one of: income tax or sales tax.
Capped Deduction
Your SALT deduction is limited to $10,000 ($5,000 if married filing separately). Any amount above that cannot be deducted.
Tax Impact
Deduction lost ร marginal federal rate = extra federal tax. For example, losing $15,000 in deductions at 24% costs $3,600 in additional tax.
Expert Tips
SALT Cap by Cap Level
| Cap | Deduction Allowed | Typical Impact |
|---|---|---|
| $10K (Current) | Up to $10,000 | Highest impact in high-tax states |
| $20K (Proposed) | Up to $20,000 | Moderate relief |
| $80K (Proposed) | Up to $80,000 | Near-full relief for most |
| Unlimited | Full SALT | Pre-2018 rules |
Frequently Asked Questions
What is the SALT deduction cap?
The Tax Cuts and Jobs Act (2017) limited the state and local tax (SALT) deduction to $10,000 per year ($5,000 if married filing separately). Before 2018, taxpayers could deduct the full amount of state income, property, and sales taxes paid.
Who is most affected by the SALT cap?
Taxpayers in high-tax states (New Jersey, New York, California, Connecticut, Maryland) with combined SALT payments exceeding $10,000 are most affected. Higher earners in these states lose the largest dollar deductions.
Can I choose between sales tax and income tax?
Yes. You must choose either state/local income tax OR state/local sales tax as your deductionโyou cannot deduct both. Most taxpayers in states with income tax use the income tax option.
What if the SALT cap is raised or removed?
Proposals have included raising the cap to $20,000 or $80,000, or removing it entirely. This calculator models the tax impact at different cap levels so you can see potential savings if legislation changes.
Does the SALT cap apply to businesses?
The $10,000 cap applies to individuals and pass-through entities (S corps, partnerships) on Schedule A. C corporations deduct state taxes as business expenses without this cap.
How is the marginal rate used in the calculation?
The tax impact of a lost deduction equals the deduction amount times your marginal federal tax rate. For example, losing a $5,000 deduction at a 24% marginal rate costs you $1,200 in extra federal tax.
Key Statistics
Official Data Sources
โ ๏ธ Disclaimer: This calculator is for educational purposes only. Tax impact estimates use simplified assumptions. Actual results depend on your full tax situation, other deductions, AMT, and state-specific rules. Consult a tax professional for personalized advice. Not financial or legal advice.
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