2025 Tax Deadlines & 2025 Rates
Individual Tax Deadlines
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Form 1040 - Due April 15, 2026 (Inc. Extensions)
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Form 1040 w/ Extension - October 15, 2026
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Form 1040-ES Estimated Payment Vouchers
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April 15, 2025 (Voucher #1)
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June 17, 2025 (Voucher #2)
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September 16, 2025 (Voucher #3)
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January 15, 2026 (Voucher #4)
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2025 Individual Tax Rates
Standard Deduction - $16,100 (Single)
Standard Deduction - $32,200 (MFJ)
Standard Deduction - $24,150 (HOH)
Single Taxpayers
$12,400 or less
10%
$12,401 to $50,400
12%
Business Tax Deadlines
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Form 1065 Partnerships - Due March 15, 2026
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Form 1065 with extension - September 15, 2026​
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Form 1120S S-Corporations - Due March 15, 2026
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Form 1120S with extension - September 15, 2026
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Form 941 - Employer Quarterly Federal Tax Return
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Q1 2025 - April 30, 2025​
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Q2 2025 - July 31, 2025
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Q3 2025 - October 31, 2025
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Q4 2025 - January 31, 2026
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Form 940 - Federal Unemployment - January 31, 2026
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Forms W2 & W3 - January 31, 2026
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Forms 1099 - Misc - January 31, 2026
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Washington State Employment Security (SUTA)
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Q1 2025 - April 30, 2025
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Q2 2025 - July 31, 2025
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Q3 2025 - October 31, 2025
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Q4 2025 - January 31, 2026
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Washington Labor and Industries (Workers Comp)​
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Q1 2025 - April 30, 2025
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Q2 2025 - July 31, 2025
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Q3 2025 - October 31, 2025
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Q4 2025- January 31, 2026
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Washington Department of Revenue​​ Excise Tax
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Varies based on business reporting requirements​ (Annual, Quarterly, or Monthly)​​
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$50,401 to $105,700
22%
$105,701 to $201,775
24%
$201,776 to $256,225
32%
$256,226 to $640,600
35%
Over $640,601
37%
Married, Filing Joint Taxpayers
$24,000 or less
10%
2025 Corporate Tax Rates
Flat Tax Rate
21%
$24,801 to $100,800
12%
$100,801 to $211,400
22%
$211,401 to $403,550
24%
$403,551 to $512,450
32%
$512,451 to $768,700
35%
Over $768,701
37%
Head of Household Taxpayers
Up to $17,700
10%
$17,701 to $67,450
12%
$67,451 to $105,700
22%
$105,701 to $201,775
24%
$201,776 to $256,200
32%
$256,201 to $640,600
35%
Over $640,601
37%