Tax Refund Calculator 2026
Enter your W-2 โ see your refund (or what you owe). Then adjust your W-4 to keep more per paycheck.
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How to Use This Calculator
Tab "My Refund"
Enter your W-2 Box 1 (gross wages) and Box 2 (federal tax withheld), filing status, and number of dependents. The calculator computes your AGI, applies the standard or itemized deduction, calculates federal tax, subtracts all eligible credits (CTC, EITC, education, child care, Saver's), and compares the result to what you already paid. Positive = refund. Negative = you owe. Open "More options" to add other income, retirement contributions, itemized deductions, and credits.
Tab "W-4 Adjust"
A big refund means you over-withheld โ the IRS held your money interest-free all year. Enter your last year's refund and pay frequency. The calculator tells you exactly how to change your W-4: how much to add to Step 3 (credits) to reduce withholding, or how much to enter in Step 4c (extra withholding) if you owed money. Shows your monthly impact and opportunity cost.
Tab "Standard vs Itemized"
With the OBBBA raising the SALT cap to $40,400 for 2026, many taxpayers who took the standard deduction under the old $10,000 cap should reconsider. Enter your potential itemized deductions โ mortgage interest, SALT (property + state income + local taxes), charity, and medical expenses โ and see which option saves more, with the exact tax savings at your marginal rate.
2026 Tax Changes (OBBBA)
Child Tax Credit: $2,200/child (up from $2,000). Refundable up to $1,700 (ACTC). Permanent with inflation indexing. Phase-out: $200K single / $400K MFJ.
SALT Cap: $40,400 for 2026 (was $10,000 under TCJA). MFS: $20,200. Phase-down for high income: 30% of MAGI over $505,000, floor $10,000. Annual 1% increases through 2029.
Senior Bonus Deduction: $6,000 per person age 65+ (both spouses can claim = $12,000 MFJ). Phase-out starts at $75K single / $150K MFJ. Available 2025-2028, regardless of itemizing.
Education Credits: AOTC now covers 5 years (was 4). LLC maximum raised to $3,000 (was $2,000). Expanded qualified expenses include online learning and credentialing.
Child & Dependent Care Credit: Maximum rate permanently raised to 50% (was 35%). Up to $1,500 credit for one child, $3,000 for two+.
Saver's Credit: 2026 is the last year โ replaced by Saver's Match starting 2027.
Standard Deductions (2026): Single $16,100 ยท MFJ $32,200 ยท HoH $24,150
Tax Brackets: 10% ยท 12% ยท 22% ยท 24% ยท 32% ยท 35% ยท 37% (TCJA made permanent)
The Formulas
AGI = Wages + Other Income + Capital Gains โ Above-the-Line Deductions
Taxable Income = max(0, AGI โ Deduction)
Federal Tax = Progressive bracket calculation on Taxable Income
Tax After Credits = Federal Tax โ Nonrefundable Credits โ Refundable Credits
Refund = Federal Tax Withheld โ Tax After Credits
Credit Ordering (matters!):
1. Nonrefundable credits (CTC nonrefundable portion, ODC, CDCC, LLC, Saver's) โ cannot reduce tax below $0
2. Refundable credits (CTC refundable portion up to $1,700/child, EITC, AOTC 40%) โ can create a refund even if tax is $0
EITC (Earned Income Tax Credit):
0 children: max $664 ยท 1 child: max $4,427 ยท 2 children: max $7,316 ยท 3+: max $8,231
Phase-out starts at $10,860 single / $18,140 MFJ (0 children), $23,890 / $31,160 (1+ children)
Investment income must be โค $12,200. MFS cannot claim EITC.
SALT Cap with Phase-Down:
Base cap = $40,400 (MFS: $20,200)
If MAGI > $505,000: cap reduced by 30% ร (MAGI โ $505,000), floor $10,000
Example: $600K MAGI โ reduction = 30% ร $95K = $28,500 โ effective cap = $11,900
Example
Sarah โ Marketing Manager in Denver, CO
$72,000 salary, single, 2 children under 17, $8,640 withheld (W-2 Box 2). No other income. $6,000 in child care expenses. Takes standard deduction.
Sarah's W-4 is over-withholding by $578/month. By adding $6,934 to her W-4 Step 3, she could keep an extra $267 per biweekly paycheck โ money she could put into a 529 plan or emergency fund instead of giving the IRS an interest-free loan.